CN1807476A - Polycarboxylic acid copolymer, production method and use thereof - Google Patents

Abstract

Disclosed is polybasic carboxylic acid copolymer, a preparation method thereof, and filler for cement and cement compound, which contain the polybasic carboxylic acid copolymer. The polybasic carboxylic acid copolymer is characterized in that the polybasic carboxylic acid copolymer is prepared with the monomer component which contains unsaturated polymerize alkylene imine monomer(AI)and carboxylic monomer(B). The polybasic carboxylic acid copolymer and the filler for cement can be used to produce cement mixture which is of high water-reducing property and constructability or of the same water-reducing property and fluidity with common mixtures and is convenient to carry. The polybasic carboxylic acid and the filler for cement can also be used to produce hardened products with great intensity and durability and are suitable for producing concrete with super high strength. In certain embodiments, the polybasic carboxylic acid copolymer is of great water-reducing capability and can reduce the viscidity of the cement mixture, thus improving the constructability of the cement during the manufacturing process.

Description

Polycarboxylic acid copolymer and its production and use

The application is the national applications submitted to December 26 calendar year 2001 the dividing an application for the Chinese patent application of " polycarboxylic acid copolymer and its production and use " that number be 0182345.6 (international application no is PCT/JP01/11437), denomination of invention.

Technical field

The present invention relates to the polycarboxylic acid multipolymer, prepare method, cement admixture and the cement composition of polycarboxylic acid multipolymer.More particularly, the present invention relates to be effective as polycarboxylic acid multipolymer, the method for preparing the polycarboxylic acid multipolymer, the cement admixture that contains the polycarboxylic acid multipolymer and the cement composition that water reducer is used for ultra high strength concrete.

Background technology

The polycarboxylic acid multipolymer is as the cement admixture component in cement composition such as cement paste, plaster and the concrete.At present, when building civil engineering and building structure etc. with cement composition, they are absolutely necessary.The cement admixture that comprises this polycarboxylic acid multipolymer can be used as water reducer, and they can improve the flowability of cement composition, therefore can reduce the demand of cement composition to water, so they can effectively improve intensity, weather resistance of hardening product etc.This water reducer is more superior than naphthyl and other conventional water reducer aspect the diminishing capacity, and in many airs and the good effect of generation in the situation of water reducer on a large scale.

On the other hand, the ground of civil engineering and building structure etc. partly need have high strength or weather resistance, therefore, will use the concrete composition that has the so-called superstrength of high performance characteristics in the concrete family when building them.As for the used water reducer of this ultra high strength concrete, can use the high ultra high strength concrete water reducer of diminishing capacity, the water yield in the concrete is fully reduced, to reach high performance characteristics.At present, for instance, can use the multipolymer of methacrylic acid and polyethylene oxide methacrylic ester to be used for ultra high strength concrete as water reducer.But, when using this water reducer that is used for ultra high strength concrete to make ultra high strength concrete, described concrete viscosity height.Therefore, but need to improve the water reducer that is used for ultra high strength concrete of application property.

Put down at the open communique of Japan special permission-specification sheets of 07-215746 in, disclosed the purposes of the multipolymer of alkene ether and maleic anhydride as water reducer, described alkene ether has the oxyalkylene group that contains 2-40 carbon atom, and its end all has alkenyl group basically and contains the special groups of 1-24 carbon atom.But, in order to invent leeway aspect copolymer structure and the characteristic in addition successfully as the water reducer that reduces agent, particularly ultra high strength concrete.

The open communique 2000-191356 of Japan's special permission has disclosed a kind of cement dispersants that can be used as the ultra high strength concrete dispersion agent, its main ingredient is water-soluble ampholyte copolymer, described ampholyte copolymer by as the specific polyamine deutero-monomer of compd A, as the specific unsaturated carboxylic acid monomer of compd B and as the specific polyglycol deutero-monomer of Compound C with compd A: compd B: Compound C=10-40 weight %: 10-40 weight %: the ratio copolymerization of 50-80 weight % makes, but and has disclosed its application property aspect excellent property in the open air.

But, the water-soluble ampholyte copolymer for preparing by copolymerization A, compd B and Compound C among all embodiment of this open communique, when being used to prepare strong concrete, can make their viscosity ratio higher, it is difficult that shoveling work becomes, therefore, there is the problem of construction aspect in they.

Summary of the invention

The purpose of this invention is to provide a kind of polycarboxylic acid multipolymer and preparation method thereof, cement admixture and comprise the cement composition of described multipolymer according to what the above-mentioned state of the art was determined, but described polycarboxylic acid multipolymer can improve the diminishing capacity and the application property of cement composition etc., and makes their easier carryings under the mobile condition identical with the diminishing capacity.Another object of the present invention provides a kind of polycarboxylic acid multipolymer and cement admixture, and they can improve the intensity and the weather resistance of cement composition hardening product, therefore can be advantageously used in the ultra high strength concrete.Another purpose of the present invention provides the method for preparing the polycarboxylic acid multipolymer, the diminishing capacity height of described polycarboxylic acid multipolymer, but can reduce the viscosity of cement composition and improve the application property that uses in the cement process.

The inventor has done the taking a broad survey of polycarboxylic acid multipolymer of the relevant water reducer that can be used as ultra high strength concrete, the result, they notice the polycarboxylic acid multipolymer that obtains by comonomer component, and described monomer component comprises as the poly (alkylenimines) unsaturated monomer (A1) of basal component and unsaturated carboxylic acid monomer (B); And expect that this multipolymer can make the easier carrying of cement composition, so they can be used for ultra high strength concrete etc. when flowability is identical with the diminishing capacity.And, they find, described poly (alkylenimines) unsaturated monomer (A1) can have oxyalkylene group, and be suitable for being used in by the polycarboxylic acid multipolymer that comonomer component obtains in the concrete etc. of superstrength, described comonomer component also comprises the polyglycol unsaturated monomer (A3) as basal component, rather than above-mentioned monomer with oxyalkylene group.

They also find, the monomer composition that use contains the polycarboxylic acid multipolymer also can reach above-mentioned identical effect, described polycarboxylic acid multipolymer is comprised to have by copolymerization makes oxyalkylene group be attached to the monomer component of the polyglycol unsaturated monomer (A2) of the structure on the polyvalent alcohol residue and unsaturated monocarboxylic acid monomer (B '), perhaps comprises to have the hydroxy-end capped polyglycol unsaturated monomer (A2 ') and the monomer component of unsaturated carboxylic acid monomer (B) that make oxyalkylene group be attached to the structure on the polyvalent alcohol residue and make; And the described polycarboxylic acid multipolymer that obtains by the monomer component that comprises the polyglycol unsaturated monomer (A3) (rather than polyglycol unsaturated monomer (A2)) as basal component beyond these monomers of copolymerization is more suitable for being used in the ultra high strength concrete etc.

In addition, about the method for preparing the polycarboxylic acid multipolymer (this method comprises that copolymerization comprises monomer (A) with oxyalkylene group and the monomer mixture of unsaturated carboxylic acid monomer (B)), they find, when using the hydrophobic group chain-transfer agent that hydrophobic group is partly introduced described multipolymer, the cement admixture that comprises the polycarboxylic acid multipolymer that is obtained has shown high diminishing capacity, can reduce the viscosity of cement composition, but and improve the application property of described cement composition in using step.

In addition, they find, the easier carrying of cement composition when flowability is identical with the diminishing capacity, in cement composition, cement admixture comprises those polycarboxylic acid multipolymers, perhaps cement admixture has the calcium branch value of 10-900mPas and/or the cement coefficient of refrigeration of 0.05-1.0, and perhaps cement admixture satisfies concrete analytical value after its pH is transferred to 12-12.5 and purifying.Now, these discoveries have caused of the present invention finishing.

Therefore, the invention provides the polycarboxylic acid multipolymer that comprises the monomer component acquisition of poly (alkylenimines) unsaturated monomer (A1) and unsaturated carboxylic acid monomer (B) by copolymerization.

The present invention also provides to comprise by copolymerization has the polycarboxylic acid multipolymer that the monomer component that makes oxyalkylene group be attached to the polyglycol unsaturated monomer (A2) of the structure on the polyvalent alcohol residue and unsaturated monocarboxylic acid monomer (B ') obtains.

The present invention also provides to comprise by copolymerization has the polycarboxylic acid multipolymer that the monomer component that makes oxyalkylene group be attached to the hydroxy-end capped polyglycol unsaturated monomer (A2 ') of the structure on the polyvalent alcohol residue and unsaturated carboxylic acid monomer (B) obtains.

The present invention also provides the method for preparing the polycarboxylic acid multipolymer, and described method comprises the monomer (A) that uses the copolymerization of hydrophobic group chain-transfer agent to comprise to have oxyalkylene group and the monomer component of unsaturated carboxylic acid monomer (B).

The present invention also provides the polycarboxylic acid multipolymer that makes by the above-mentioned method for preparing the polycarboxylic acid multipolymer.

The present invention also provides the cement admixture that comprises above-mentioned polycarboxylic acid multipolymer.

And, the invention provides the calcium branch value with 10-900mPas and/or the cement admixture of 0.05-1.0 cement coefficient of refrigeration.

The present invention also provides a kind of cement admixture, when adjusting pH to 12-12.5 and subsequent purificn, determines that according to ultimate analysis it has the nitrogen content of 0.1-20 weight %; It allows to measure morpholine, 4-(2-hydroxyethyl) morpholine and 1,4-diox on pyrolysis GC-MASS; It shows the peak that does not have replat in GPC; Its weight-average molecular weight (Mw) is 5,000-300,000; In IR measured, it was at 1640-1660 centimetre ^-1The place demonstrates absorption peak, and its intensity is no more than at 1710-1630 centimetre ^-120% of the absorption peak strength that the place exists; ¹³Among the C-NMR, can measure the chemical shift signal of 60-61ppm and 69-68ppm; NMR-PEG content is that 10-99 weight % and TCAV are 3-900 milligram KOH/g.

At last, the present invention also provides a kind of cement composition, and described composition comprises water, cement and cement admixture at least, and described cement admixture can be used as described cement admixture.

Detailed description of the invention

Below, will describe the present invention in detail.

Polycarboxylic acid multipolymer of the present invention has (1) comprises the monomer component acquisition of poly (alkylenimines) unsaturated monomer (A1) and unsaturated carboxylic acid monomer (B) by copolymerization form; (2) comprise by copolymerization and have the form that the monomer component that makes oxyalkylene group be attached to the polyglycol unsaturated monomer (A2) (hereinafter abbreviate as sometimes " polyglycol unsaturated monomer (A2)) of the structure on the polyvalent alcohol residue and unsaturated monocarboxylic acid monomer (B ') obtains; (3) comprise by copolymerization and have the form that the monomer component that makes oxyalkylene group be attached to the hydroxy-end capped polyglycol unsaturated monomer (A2 ') (hereinafter abbreviate as sometimes " polyglycol unsaturated monomer (A2 ')) of the structure on the polyvalent alcohol residue and unsaturated carboxylic acid monomer (B) obtains.This polycarboxylic acid multipolymer can be to carry out the product that copolymerization obtains by monomer (A1) and monomer (A2) or monomer (A2 ') are mixed.Therefore, it can have by copolymerization and comprises the form that the monomer component as the poly (alkylenimines) unsaturated monomer (A1) of basal component and/or polyglycol unsaturated monomer (A2) or (A2 ') and unsaturated carboxylic acid monomer (B) obtains.These monomers respectively comprise only a kind of or two or more mixture.In this manual, described polyglycol unsaturated monomer (A2) comprises hydroxy-end capped polyglycol unsaturated monomer (A2 '), and described unsaturated carboxylic acid monomer (B) comprises unsaturated monocarboxylic acid monomer (B ').Described polyglycol unsaturated monomer (A2) is meant polyglycol unsaturated monomer (A2) in above-mentioned form (1), (2) or (3) or hydroxy-end capped polyglycol unsaturated monomer (A2 '); Described unsaturated carboxylic acid monomer (B) is meant unsaturated carboxylic acid monomer (B) in above-mentioned form (1), (2) or (3) or unsaturated monocarboxylic acid monomer (B ').

In the preferred embodiment of the invention, above-mentioned poly (alkylenimines) unsaturated monomer (A1) has oxyalkylene group.In above-mentioned polycarboxylic acid multipolymer with form (1), (2) or (3), these monomeric weight ratios make monomer (A1) and/or monomer (A2) account for 1-99 weight %, and monomer (B) accounts for 99-1 weight %.When these monomeric weight ratios were not in above-mentioned scope, the effect of the repeating unit that is formed by hereinafter described each monomer can not be brought into play effectively, therefore, can not make effect of the present invention reach satisfied degree.Be more preferably, monomer (A1) and/or monomer (A2) account for 20-95 weight %, and monomer (B) accounts for 80-5 weight %.Above-mentioned monomer (A1) and/or monomer (A2) and weight ratio (B) with monomer (A1) and/or monomer (A2) and (B) weight percentage of gross weight provide, described gross weight is regarded 100 weight % as.

In implementing process of the present invention, preferred above-mentioned monomer component also comprises above-mentioned monomer polyglycol unsaturated monomer (A3) in addition with oxyalkylene group.Above-mentioned monomer (A1) with oxyalkylene group is the poly (alkylenimines) unsaturated monomer (A1) that has oxyalkylene group in the form (1), perhaps in form (2) or (3), it is to have to make oxyalkylene group be attached to the polyglycol unsaturated monomer (A2) of the structure on the polyvalent alcohol residue.When comprising this polyglycol unsaturated monomer (A3), the present invention can obtain more effectively effect.In this case, monomer (A1) and/or monomer (A2) should account for 1-98 weight %, and monomer (B) accounts for 1-98 weight %, and monomer (A3) accounts for 1-98 weight %.Be preferably, monomer (A1) and/or monomer (A2) account for 1-80 weight %, and monomer (B) accounts for 1-50 weight %, and monomer (A3) accounts for 30-98 weight %.Be more preferably, monomer (A1) and/or monomer (A2) account for 1-50 weight %, and monomer (B) accounts for 1-40 weight %, and monomer (A3) accounts for 30-98 weight %.Especially preferred monomers (A1) and/or monomer (A2) account for 1-35 weight %, and monomer (B) accounts for 1-30 weight %, and monomer (A3) accounts for 25-98 weight %.More suitable is, monomer (A1) and/or monomer (A2) account for 1-20 weight %, and monomer (B) accounts for 1-30 weight %, and monomer (A3) accounts for 25-95 weight %.Above-mentioned monomer (A1) and/or (A2) or (A2 '), (B) and weight ratio (A3) with monomer (A1) and/or (A2), (B) and (A3) weight percentage of gross weight provide, described gross weight is regarded 100 weight % as.In implementing process of the present invention, as mentioned below, except above-mentioned monomer, can also use other monomer.When using other monomer, preferred monomers (A1) and/or (A2), (B) and (A3) main ingredient of overall conduct in monomer component.

As for polycarboxylic acid multipolymer of the present invention, can suppose the effect of the repeating unit that forms by poly (alkylenimines) unsaturated monomer (A1) and/or polyglycol unsaturated monomer (A2) in conjunction with unsaturated carboxylic acid monomer (B) and/or polyglycol unsaturated monomer (A3), but bring into play its effect in improving cement composition diminishing capacity and application property, be that the described repeating unit that is formed by unsaturated carboxylic acid monomer (B) is brought into play it and made the polycarboxylic acid multipolymer be adsorbed on effect on the cement granules, and because the wetting ability and the steric exclusion power of described oxyalkylene group, the repeating unit that forms by polyglycol unsaturated monomer (A3) bring into play its effect that improves aspects such as cement composition dispersibility and, have many nitrogen-atoms in described each molecule of repeating unit that forms by poly (alkylenimines) unsaturated monomer (A1), and have many Sauerstoffatoms by the repeating unit that polyglycol unsaturated monomer (A2) forms in each molecule, these are the monomeric units that also have branched structure separately; Because these facts can infer that above-mentioned interaction energy is brought into play effectively.When these effects obtain bringing into play, but the diminishing capacity of cement composition and application property can be improved, and when flowability is identical with the diminishing capacity, the cement composition that is more prone to carry can be provided.In addition, also can improve the intensity and the weather resistance of described hardening product.Therefore, the cement admixture that comprises polycarboxylic acid multipolymer of the present invention is suitable for use as the water reducer of ultra high strength concrete, and it is not only applicable to the concrete and the strong concrete of regular tenacity, also is applicable to the concrete of superstrength.Term " ultra high strength concrete " is meant common alleged a kind of concrete in the cement composition field, promptly aspect the intensity of hardening product, even when its water/cement proportion is reduced to conventional content when suitable, its intensity also is equivalent to or is higher than the concrete of conventional concrete kind.For example, even when the ratio of water/cement is not higher than 25 weight %, more is not higher than 20 weight %, particularly is not higher than 18 weight %, especially is not higher than 14 weight %, when being specially 12 weight %, but this concrete is presented at the application property level that can not occur any problem in the general use, and the demonstration of described hardening product is not less than 60N/mm ², be not less than 80N/mm more ², be not less than 100N/mm more ², particularly be not less than 120N/mm ², significantly be not less than 160N/mm ², especially be not less than 200N/mm ²Compressive strength.

Now, the monomer that forms polycarboxylic acid multipolymer of the present invention as monomer component has been described hereinafter.

Poly (alkylenimines) unsaturated monomer of the present invention (A1) can be any poly (alkylenimines) with polymerizable unsaturated group, and can for example make by the unsaturated compound reaction of poly (alkylenimines) with the functional group of amino with energy and above-mentioned poly (alkylenimines) or imino-reaction.In the present invention, preferred poly (alkylenimines) unsaturated monomer (A1) has oxyalkylene group.This poly (alkylenimines) unsaturated monomer (A1) can be any poly (alkylenimines) with unsaturated group and oxyalkylene group, and the compound that can be for example forms on the nitrogen-atoms of amino by oxyalkylene being added to poly (alkylenimines) and imino-and have can and the unsaturated compound of the functional group of hydroxyl, amino and/or the imino-reaction of above-claimed cpd react and make.The amino or the nitrogen-atoms on the imino-that will add oxyalkylene thereon are the nitrogen-atoms with active hydrogen atom.

As for unsaturated group being introduced by oxyalkylene being added in the compound that poly (alkylenimines) obtains, be used to obtain above-mentioned method with poly (alkylenimines) unsaturated monomer (A1) of oxyalkylene group, be suitable for using the method for the following stated: make hydroxyl and unsaturated compound carry out transesterification reaction, to introduce the method for unsaturated group as (methyl) vinylformic acid or (methyl) alkyl acrylate by oxyalkylene being added to the compound that poly (alkylenimines) obtains; Make amino and unsaturated compound carry out amidate action, to introduce the method for unsaturated group as (methyl) vinylformic acid or (methyl) alkyl acrylate by oxyalkylene being added to the compound that poly (alkylenimines) obtains; Make hydroxyl and epoxy compounds react the method for introducing unsaturated group as (methyl) glycidyl acrylate or (methyl) glycidyl allyl ether by oxyalkylene being added to the compound that poly (alkylenimines) obtains.

What be suitable for use as above-mentioned poly (alkylenimines) is alkylene imine homopolymer and multipolymer, they are by one or both or the multiple alkylene imine that contains 2-8 carbon atom such as ethylene imine, 2-methyl ethylene imine, 1,2-butylidene imines, 2,3-butylidene imines and 1,1-dimethyl ethylene imine etc.These may be used singly or in combin in them two or more.This poly (alkylenimines) has formed the poly (alkylenimines) chain of poly (alkylenimines) unsaturated monomer (A1), and above-mentioned poly (alkylenimines) chain can have any one in linear chain structure, branched structure and the three-dimensional crosslinking structure.And, also can use ethylene diamine, diethylenetriamine, Triethylenetetramine (TETA) and tetren etc.In their structure, this poly (alkylenimines) not only has uncle's amino usually, but also has primary amino and the secondary amino group (imino-) that contains active hydrogen atom respectively.

What be suitable for use as above-mentioned unsaturated compound is that unsaturated carboxylic acid is as (methyl) vinylformic acid, toxilic acid, fumaric acid and citraconic acid; Unsaturated carboxylic acid anhydrides is as (methyl) acrylic anhydride, maleic anhydride; Unsaturated carboxylic acid halogenide is as (methyl) vinylformic acid muriate; Esters of unsaturated carboxylic acids as (methyl) acrylic anhydride alkyl ester with the alkyl that contains 1-30 carbon atom, have the toxilic acid monoesters of the alkyl that contains 1-30 carbon atom and have the maleic acid diester of the alkyl that contains 1-30 carbon atom; And epoxy compounds is as (methyl) glycidyl acrylate and (methyl) allyl glycidyl.These may be used singly or in combin in them two or more.

Be suitable for being used for being added to oxyalkylene on the above-mentioned poly (alkylenimines) and be the oxyalkylene that contains 2-8 carbon atom such as oxyethane, propylene oxide, 1,4-butylene oxide ring, epoxy Trimethylmethane, 1,2-butylene oxide ring, 2,3-butylene oxide ring, trimethylammonium oxyethane, tetrahydrofuran, tetramethyl-ring oxidative ethane, butadiene monoxide and octylene oxide; Also has aliphatic epoxide such as diamyl oxyethane and dihexyl oxyethane; Cycloaliphatic epoxides such as trimethylene oxide, tetrahydrofuran, tetrahydrofuran (THF), tetrahydropyrans and octylene oxide; And aromatic epoxide such as Styrene oxide 98min., 1,1-phenylbenzene oxyethane etc.These may be used singly or in combin in them two or more.

As follows, the example that is used to obtain the reaction formula of above-mentioned poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group is to use the reaction formula of initiator by ethylene imine synthesizing polyethylene imines, have on the nitrogen-atoms of active hydrogen atom and prepare polymine-ethylene oxide adduct by oxyethane being added to polymine then, and carry out transesterification reaction with methacrylic acid.Also exist and comprise the synthesizing polyethylene imines, then oxyethane is added to polymine and has on the nitrogen-atoms of active hydrogen atom, and make the method for gained polymine-ethylene oxide adduct and glycidyl methacrylate reaction.

In the above-mentioned reaction formula, R ^aThe expression initiator, EO representative ring oxidative ethane ,-(EO) n-H represents that described group is added to by n ethylene oxide molecule and obtains on the nitrogen-atoms of band active hydrogen atom of polymine, MAA represents methacrylic acid.In the chemical formula symbol " ... " be meant that polymer chain continues in an identical manner.

Above-mentioned poly (alkylenimines) unsaturated monomer (A1) or the poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group have the poly (alkylenimines) chain.This poly (alkylenimines) chain should mainly be formed by ethylene imine.In this case, " mainly " is meant that when described poly (alkylenimines) chain was formed by two or more alkylene imine, with respect to all alkylene imine mole numbers, described alkylene imine was in the great majority.In the present invention, when the alkylene imine that accounts for described formation poly (alkylenimines) chain is most when being ethylene imine, described polycarboxylic acid multipolymer provides high-hydrophilic, therefore and bring into play its functional effect satisfactorily, as mentioned above, the ethylene imine that use can provide the conduct of above-mentioned functions effect to form the poly (alkylenimines) chain satisfactorily causes it to account for " great majority ", and therefore, this chain is mainly formed by them.

In above-mentioned statement, when ethylene imine accounted for " great majority " of alkylene imine of above-mentioned formation poly (alkylenimines) chain, its ratio was represented with the molecular fraction that accounts for all 100 molecular fraction alkylene imine.If it is lower than 50 moles of %, the wetting ability of poly (alkylenimines) chain may reduce.Preferably is that it is not less than 60 moles of %, is more preferably to be not less than 70 moles of %, especially is not less than 80 moles of %, preferably is not less than 90 moles of %.

As for above-mentioned poly (alkylenimines) unsaturated monomer (A1) or have the poly (alkylenimines) unsaturated monomer (A1) of oxyalkylene group, the average polymerization number of alkylene imine should be not less than 2 in each poly (alkylenimines) chain, but is no more than 300.If be lower than 2, the function of poly (alkylenimines) unsaturated monomer (A1) just can not be brought into play fully, if superelevation 300, the polymerizability of poly (alkylenimines) unsaturated monomer (A1) may reduce.Especially suitable is that it is not less than 3, better is to be no more than 200, is more preferably and is no more than 100, especially should not surpass 75, preferably is no more than 50.In this case, the average polymerization number of diethylenetriamine is 2, and the average polymerization number of Triethylenetetramine (TETA) is 3.

Among the present invention, polyglycol unsaturated monomer (A2) makes oxyalkylene group be attached to the polyglycol unsaturated monomer of the structure on the polyvalent alcohol residue for having.The polyglycol unsaturated monomer (A2 ') be hydroxy-end capped polyglycol unsaturated monomer (A2).

Above-mentioned polyvalent alcohol residue is meant to have the group that makes the structure that active hydrogen atom removes from polyvalent alcohol, but it is not limited to the group by forming with polyol reaction especially.As for the oxyalkylene that is added on the polyvalent alcohol hydroxyl, can be and above-mentioned those identical oxyalkylenes.

As for the method for the above-mentioned polyglycol unsaturated monomer of preparation (A2), can be following method, for example, (1) comprises the unsaturated group introducing by oxyalkylene being added to the method in the compound that obtains on the polyvalent alcohol; (2) comprise adding each mole unsaturated alcohol or unsaturated alcohol-polyglycol adducts and be not less than 1 mole of Racemic glycidol that formation is no less than two hydroxyls in each molecule, then oxyalkylene is added the method in the products therefrom.

In the aforesaid method (1), the appropriate method of introducing unsaturated group be comprise the hydroxyl that makes by oxyalkylene being added the compound that polyvalent alcohol obtains and unsaturated compound as (methyl) vinylformic acid or (methyl) methyl acrylate or similarly (methyl) alkyl acrylate carry out esterification or transesterification reaction, introduce the method for unsaturated group; Comprise making and react the method for introducing unsaturated group as (methyl) glycidyl acrylate or (methyl) glycidyl allyl ether by hydroxyl that oxyalkylene is added to the compound that polyvalent alcohol obtains and the epoxy compounds that contains 2-5 carbon atom; And the halogenation alkenyl compound that comprises and contain 2-5 carbon atom carries out the method that etherification reaction is introduced unsaturated group as (methyl) allyl chloride.The unsaturated compound that is suitable for being used for introducing unsaturated group is that unsaturated carboxylic acid is as (methyl) vinylformic acid, toxilic acid, fumaric acid and citraconic acid; Unsaturated carboxylic acid anhydrides is as (methyl) acrylic anhydride, maleic anhydride; Unsaturated carboxylic acid halogenide is as (methyl) vinylformic acid muriate; Esters of unsaturated carboxylic acids as (methyl) acrylic anhydride alkyl ester with the alkyl that contains 1-30 carbon atom, have the toxilic acid monoesters of the alkyl that contains 1-30 carbon atom and have the maleic acid diester of the alkyl that contains 1-30 carbon atom; And epoxy compounds is as (methyl) glycidyl acrylate and (methyl) glycidyl allyl ether.These may be used singly or in combin in them two or more.Especially, preferably contain the unsaturated group that is no less than 4 carbon atoms, be more preferably contain be no less than 5 carbon atoms unsaturated group as alkenyl compound type unsaturated group.Methylallyl and sec.-propyl (3-methyl-3-butylene) base is preferably allyl group.And, also preferred (methyl) acryloyl.

Above-mentioned polyvalent alcohol can be on average to have the compound that is no less than three hydroxyls in any molecule, this is not had particular restriction.In preferred embodiments, the compound that contains the polyvalent alcohol residue is made of three kinds of elements, i.e. carbon, hydrogen and oxygen.

Above-mentioned hydroxyl groups number should be no less than 3, and should not surpass 300.If be less than 3, the function of polyglycol unsaturated monomer (A2) can not be brought into play fully, if surpass 300, the polymerizability of polyglycol unsaturated monomer (A2) may reduce.Suitable is that it is no less than 4, is more preferably to be no less than 5, especially should be no less than 6.It should not surpass 100, is more preferably and is no more than 50, especially should not surpass 25.

What be suitable for use as polyvalent alcohol is many Racemic glycidols, glycerine, polyglycerol, trimethylolethane, TriMethylolPropane(TMP), 1,3,5-penta triol, butantetraol, tetramethylolmethane, Dipentaerythritol, Sorbitol Powder, Sorbitan, Sorbitol Powder-glycerol condensate, adonitol, arabitol, Xylitol, N.F,USP MANNITOL etc.Carbohydrate also is suitable for, for example hexose such as glucose, fructose, seminose, indoles sugar, sorbose, gulose, talose, tagatose, semi-lactosi, allose, psicose and altrose; Pentose class such as pectinose, ribulose, ribose, wood sugar, xylulose and lyxose; Tetrose class such as threose, erythrulose and erythrose; Other carbohydrate such as rhamnosyl, cellobiose, maltose, isomaltose, trehalose, sucrose, raffinose, gentianose and melizitose; By these deutero-sugar alcohols and saccharic acid (carbohydrate: glucose; Sugar alcohol: glucitol; Saccharic acid: glyconic acid) etc.And the derivative of above-claimed cpd part etherificate or partial esterification also is suitable for.These may be used singly or in combin in them two or more.

The polyvalent alcohol residue of polyglycol unsaturated monomer (A2) is by this compound formation.As for described unsaturated compound, can use above-mentioned similar compounds separately or be used in combination in them two or more.

In the aforesaid method (2), vinyl alcohol, (methyl) allyl alcohol, 3-butene-1-alcohol, Virahol (3-methyl-3-butene-1-alcohol), 3-methyl-2-butene-1,2-methyl-3-butene-2-alcohol, 2-methyl-2-butene-1-alcohol, 2-methyl-3-butene-1-alcohol etc. are suitable for use as unsaturated alcohol.As for unsaturated alcohol-polyglycol adducts, can use to have to make the polyglycol chain be added to the compound of the structure on this unsaturated alcohol.

At above-mentioned poly (alkylenimines) unsaturated monomer (A1) or respectively have in the polyglycol unsaturated monomer (A2) of oxyalkylene group, exist by adding group that a kind of oxyalkylene group forms or by adding the group that two or more oxyalkylene groups form.Can form by adding the group that two or more oxyalkylene groups form by one or both or multiple oxyalkylene group kind, and when group during by two or more oxyalkylene group kind forms, can be in any adding mode, promptly random addition, block addition, alternately mode such as addition adds two or more oxyalkylene group kinds.When having the many groups that formed by above-mentioned oxyalkylene group in each molecule, they can be identical or different.Be also referred to as " polyglycol chain " by the group that adds two or more oxyalkylene groups formation.

The group that is formed by above-mentioned oxyalkylene group is preferably the group that is mainly formed by oxyalkylene group.In this case, as previously mentioned, " mainly " be meant and have two or more oxyalkylene group kind time-likes in the monomer, and with respect to the number of the oxyalkylene group of all existence, described oxyalkylene group is in the great majority.Like this, improve the wetting ability of polycarboxylic acid multipolymer, and can bring into play its functional effect fully.

In above-mentioned statement, when oxyalkylene group accounted for " great majority ", its ratio was represented with the molecular fraction that accounts for all 100 molecular fraction alkylene imine.If it is lower than 50 moles of %, the wetting ability of poly (alkylenimines) chain may reduce.Preferably is that it is not less than 60 moles of %, is more preferably to be not less than 70 moles of %, especially is not less than 80 moles of %, preferably is not less than 90 moles of %.

As for above-mentioned poly (alkylenimines) unsaturated monomer (A1) or have the poly (alkylenimines) unsaturated monomer (A2) of oxyalkylene group, add oxyalkylene group average mol be preferably 0-300.If superelevation 300, these monomeric polymerizabilities may reduce.Especially suitable is, it is not less than 0.3, better is to be not less than 0.5, especially should not be lower than 1, preferably is not less than 2, but it should not surpass 270, better is to be no more than 250, especially should not surpass 220, preferably be no more than 200.If the average mol that institute adds oxyalkylene group in poly (alkylenimines) unsaturated monomer (A1) or the polyglycol unsaturated monomer is in this scope, the polycarboxylic acid multipolymer can not be brought into play the function of its raising cement composition flowability etc. fully.The average mol of above-mentioned adding is meant the mole number mean value of the oxyalkylene group in the group that every mole of described adding forms by the oxyalkylene group of poly (alkylenimines) unsaturated monomer (A1) or polyglycol unsaturated monomer (A2), or the mole number mean value of the oxyalkylene group on the described nitrogen-atoms that is added to every mole of poly (alkylenimines) band active hydrogen atom, described oxyalkylene group is used to form poly (alkylenimines) unsaturated monomer (A1), or the described oxyalkylene group mole number mean value that is added on every mole of hydroxyl groups, described oxyalkylene group is used to form polyglycol unsaturated monomer (A2), wherein, the average mol of above-mentioned adding is 0 o'clock, does not then have oxyalkylene group.

As for above-mentioned polyglycol unsaturated monomer (A2), when the monomer component that is using in preparation polycarboxylic acid multipolymer comprised unsaturated monocarboxylic acid monomer (B '), described to have at least one end that makes its oxyalkylene group that is attached to the structure on the polyvalent alcohol residue be hydroxyl.Preferably is that all oxyalkylene ends are hydroxyls.When at least one is alkyl in the end of described oxyalkylene group, may reduce the diminishing capacity of the cement admixture that comprises the polycarboxylic acid multipolymer.In above-mentioned polyglycol unsaturated monomer (A2 '), all oxyalkylene group ends are hydroxyl.

Above-mentioned poly (alkylenimines) unsaturated monomer (A1) perhaps respectively has the poly (alkylenimines) unsaturated monomer (A1) of oxyalkylene group or polyglycol unsaturated monomer (A2) and has and be not less than 500, but is not higher than 500,000 weight-average molecular weight, preferably is to be not less than 1,000, better be to be not less than 5,000, be more preferably and be not less than 8,000, especially be not less than 10,000, but better be not to be higher than 300,000, be more preferably and be not higher than 200,000, suitable more is not to be higher than 100,000, especially be not higher than 80,000.

In the present invention, described unsaturated carboxylic acid monomer (B) can be any those groups that have polymerizable unsaturated group and can form the group of carbanion.But, suitable is unsaturated monocarboxylic acid monomer (B ') and the unsaturated dicarboxylic acid monomer etc.

Above-mentioned unsaturated monocarboxylic acid monomer (B ') can be to have a kind of unsaturated group and a kind of monomer that can form the group of carbanion in the molecule.In preferred embodiments, compound is expressed as following general formula (1):

In above-mentioned general formula, R represents hydrogen atom or methyl, and M represents hydrogen atom, atoms metal, ammonium ion or organic amino group.

Be suitable in the above-mentioned general formula (1) as atoms metal M be the monovalent metal atom, for example, alkali metal atom such as lithium, sodium and potassium; Divalent metal atom, for example alkaline earth metal atom such as calcium and magnesium; And trivalent metal atom such as aluminium and iron.Be suitable for is alkanolamine such as ethanol amido, di-alcohol amido and trolamine base and triethylamine group as organic amino group.And it can be an ammonium ion.Being suitable for monomeric as this unsaturated monocarboxylic acid is vinylformic acid, methacrylic acid, Ba Dousuan etc. and their monovalent metal salt, divalent metal salt, ammonium salt and organic amine salt etc.Wherein, from improving the viewpoint of cement dispersive ability, should use methacrylic acid, monovalent metal salt, divalent metal salt, ammonium salt and organic amine salt etc., and be suitable for as unsaturated carboxylic acid monomer (B).

Above-mentioned unsaturated dicarboxylic acid monomer can be to have a kind of unsaturated group and two kinds of those monomers that can form the group of carbanion in any molecule.Suitable is toxilic acid, methylene-succinic acid, citraconic acid, fumaric acid etc. and their monovalent metal salt, divalent metal salt, ammonium salt and organic amine salt, or their acid anhydrides.

Except these, be suitable for as above-mentioned unsaturated carboxylic acid monomer (B) be unsaturated carboxylic acid monomer and contain half ester, the unsaturated dicarboxylic acid of the alcohol of 1-22 carbon atom and contain half amide, the unsaturated dicarboxylic acid monomer of the amine of 1-22 carbon atom and contain 2-4 carbon atom ethylene glycol half ester and toxilic acid and contain the half amide etc. of the ethylene glycol of 2-4 carbon atom.

Among the present invention, except that above-mentioned monomer with oxyalkylene group, described polyglycol unsaturated monomer (A3) has polymerisable unsaturated group and polyglycol chain, and be the form that comprises the monomer component acquisition of poly (alkylenimines) unsaturated monomer (A1) and unsaturated carboxylic acid monomer (B) by copolymerization, it is to be different from above-mentioned poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group, be to comprise and have the form that the monomer component that makes oxyalkylene group be attached to the polyglycol unsaturated monomer (A2) of the structure on the polyvalent alcohol residue and unsaturated monocarboxylic acid monomer (B) obtains by copolymerization, it is the monomer that is different from above-mentioned poly (alkylenimines) unsaturated monomer (A1), and be to comprise and have the form that the monomer component that makes oxyalkylene group be attached to the hydroxy-end capped polyglycol unsaturated monomer (A2 ') of the structure on the polyvalent alcohol residue and unsaturated carboxylic acid monomer (B) obtains by copolymerization, it can be the monomer that is different from above-mentioned polyglycol monomer (A2), and suitable polyglycol ester monomer and unsaturated alcohol-polyglycol adducts is arranged.Above-mentioned polyglycol ester monomer can be to have the monomer that makes the structure that described unsaturated group and polyglycol chain link together by ester bond.Suitable is unsaturated polyester glycol carboxylate, especially single (methyl) vinylformic acid (alkoxyl group) polyglycol ester.

Above-mentioned unsaturated alcohol-polyglycol adducts can be to have to make the polyglycol chain be added to the compound of the structure on the alcohol with unsaturated group.Suitable is vinyl alcohol-oxyalkylene addition compound, (methyl) allyl alcohol-oxyalkylene addition compound, 3-butene-1-alcohol-oxyalkylene addition compound, isoprene alcohol (3-methyl-3-butene-1-alcohol)-oxyalkylene addition compound, 3-methyl-2 butene-1s-alcohol-oxyalkylene addition compound, 2-methyl-3-butene-2-alcohol-oxyalkylene addition compound, 2-methyl-2-butene-1-alcohol-oxyalkylene addition compound and 2-methyl-3-butene-1-alcohol-oxyalkylene addition compound etc.This unsaturated alcohol-polyglycol adducts is preferably the compound with following general formula (2) expression:

In above-mentioned general formula (2), R ¹, R ²And R ³Can be identical or different, represent hydrogen atom or methyl separately.R ⁴Expression hydrogen atom or contain the alkyl of 1-20 carbon atom.R ^xCan be identical or different, representative contains the alkenyl of 218 carbon atoms separately, m represent to be added by R ^xThe average mol of the oxyalkylene group that O represents, its value is 1-300.X represent to contain 1-5 carbon atom the divalence alkenyl or when shown in adjacent carbon atom be vinyl when directly being connected mutually with Sauerstoffatom.

In above-mentioned general formula (2) by-(R ^xO)-two or more oxyalkylene group kinds of expression are when appearing in same unsaturated alcohol-polyglycol adducts, by-(R ^xO)-oxyalkylene group of expression can add by any way, promptly random addition, block addition, alternately addition etc.

Above-mentioned by-(R ^xO)-oxyalkylene addition compound formed by the oxyalkylene group that comprises 2-18 carbon atom of oxyalkylene group of expression.This oxyalkylene addition compound has by one or both or multiple oxyalkylene such as oxyethane, propylene oxide, 1,4-butylene oxide ring, epoxy Trimethylmethane, 1,2-butylene oxide ring, 2,3-butylene oxide ring.In these oxyalkylene addition compounds, optimization ethylene oxide, propylene oxide, 1,4-butylene oxide ring adducts.

Adding is by above-mentioned R ^xThe average mol of the oxyalkylene group that O represents is 1-300.If surpass 300, monomeric polymerizability can reduce.The m preferred range is to be not less than 2, and-(R ^xO) among the m-, the average mol of the oxyalkylene group that is added should be not less than 2.If m be lower than 2 or the average mol of the oxyalkylene group that added be lower than 2, just can not obtain enough wetting abilities and dispersion cement particulate steric hindrance, so just can not obtain good flowability.The m preferred range is to be not less than 3 still to be no more than 280.Be more preferably, m is not less than 5, better is to be not less than 10, especially is not less than 20.On the other hand, m is more preferably and is no more than 250, especially should not surpass 150.As for the average mol of the oxyalkylene group that is added, should be not less than 3 and still should not surpass 280.Being more preferably, being not less than 10, better is to be not less than 20.On the other hand, better be to be no more than 250, be more preferably and be no more than 200, especially should not surpass 150.The average mol that is added is meant the described mean value that forms the organic group mole number of each mole of monomer by addition reaction.As for described monomer, can use two or more and the different monomer mixture of oxyalkylene group average mol that is added.As for suitable mixture, can for example be two kinds add average mol m differ and be no less than 10 the monomer (A3) of (m differ should not less than 20) mixture, be no less than the mixture that three kinds of m differed and be no less than 10 monomer (A3) of (m differ should not less than 20).And, for the scope of mixing the m value of using, can with add average mol m in the 40-300 scope monomer (A3) and be in monomer (A3) mixing in the 1-40 scope (m differ and is no less than 10, should be no less than 20), perhaps will add average mol m in the 20-300 scope monomer (A3) and the monomer (A3) that is in the 1-20 scope mix (m differs and is no less than 10, should be no less than 20).

As for above-mentioned R ⁴, if carbonatoms surpasses 20, the wetting ability of polycarboxylic acid multipolymer became strong, can not obtain good dispersive ability.From the viewpoint of dispersive ability, R ⁴Embodiment preferred is alkyl or the hydrogen atom that contains 1-20 carbon atom, better be contain be no more than 10 carbon atoms, be more preferably be no more than 3 carbon atoms, especially be no more than 2 carbon atoms alkyl.In order to reach emanate performance and make the air capacity that adds in the cement composition enough of good preventing, preferably contain the alkyl that is not less than 5 carbon atoms, and preferably contain the alkyl that is no more than 20 carbon atoms.The alkyl that more preferably contains 5-10 carbon atom.In the described alkyl, preferred saturated alkyl and unsaturated alkyl.These alkyl can be straight chain or side chain.

Above-mentioned unsaturated alcohol-polyglycol adducts can be above-mentioned a kind of.Suitable is the polyoxyethylene glycol mono vinyl ether, the polyoxyethylene glycol mono allyl ether, polyethyleneglycol (2-methyl-2-propenyl) ether, polyethyleneglycol (crotyl) ether, polyethyleneglycol (3-methyl-3-butenyl) ether, polyethyleneglycol (3-methyl-2 butenyl) ether, polyethyleneglycol (2-methyl-3-butenyl) ether, polyethyleneglycol (2-methyl-2-butene base) ether, polyethyleneglycol (1,1-dimethyl-2-propenyl) ether, polyethylene glycol-propylene glycol list (3-methyl-3-butenyl) ether, methoxy poly (ethylene glycol) list (3-methyl-3-butenyl) ether, oxyethyl group polyethyleneglycol (3-methyl-3-butenyl) ether, 1-propoxy-polyethyleneglycol (3-methyl-3-butenyl) ether, cyclohexyloxy polyethyleneglycol (3-methyl-3-butenyl) ether, 1-octyloxy polyethyleneglycol (3-methyl-3-butenyl) ether, nonyl alkoxyl group polyethyleneglycol (3-methyl-3-butenyl) ether, lauryl alkoxyl group polyethyleneglycol (3-methyl-3-butenyl) ether, octadecyl alkoxyl group polyethyleneglycol (3-methyl-3-butenyl) ether, phenoxy group polyethyleneglycol (3-methyl-3-butenyl) ether, naphthyloxy polyethyleneglycol (3-methyl-3-butenyl) ether, the methoxy poly (ethylene glycol) mono allyl ether, oxyethyl group polyoxyethylene glycol mono allyl ether, phenoxy group polyoxyethylene glycol mono allyl ether, methoxy poly (ethylene glycol) list (2-methyl-2-propenyl) ether, oxyethyl group polyethyleneglycol (2-methyl-2-propenyl) ether, phenoxy group polyethyleneglycol (2-methyl-2-propenyl) ether etc.

Above-mentioned (alkoxyl group) polyglycol list (methyl) acrylate is preferably the compound shown in the following general formula (3):

In the above-mentioned general formula (3), R ⁵Expression hydrogen atom or methyl, R ^xCan be identical or different, expression contains the alkenyl of 2-18 carbon atom, R separately ⁶Expression hydrogen atom or contain the alkyl of 1-30 carbon atom, and p represent to be added by R ^xThe average mol of the oxyalkylene group that O represents, its value is 2-300.

As for added in the above-mentioned general formula (3) by-(R ^xO)-expression oxyalkylene group and R ^xThe average mol p of the oxyalkylene group that O represents, can be with above-mentioned general formula (2) indication identical.From improve the angle of esterification yied with (methyl) vinylformic acid, preferably use (methyl) vinylformic acid that ethylene oxide moiety is added on the position of ester bond.

Added by R ^xThe average mol p of the oxyalkylene group that O represents is 2-300.If p surpasses 300, monomeric polymerizability can reduce.The p preferred range is to be not less than 2, and-(R ^xO) among the p-, the average mol of the oxyalkylene group that is added should be not less than 2.If p be lower than 2 or the average mol of the oxyalkylene group that added be lower than 2, just can not obtain enough wetting abilities and dispersion cement particulate steric hindrance, so just can not obtain good flowability.The p preferred range is to be not less than 3 still to be no more than 280.Be preferably, p is not less than 5, is more preferably and is not less than 10, especially is not less than 20.On the other hand, p is no more than 250, is more preferably and is no more than 200, especially should not surpass 150.As for the average mol of the oxyalkylene group that is added, should be not less than 5 and still should not surpass 250.Being more preferably, being not less than 10, better is to be not less than 20.On the other hand, better be to be no more than 200, be more preferably and be no more than 150.The average mol that is added is meant the described mean value that forms the organic group mole number of each mole of monomer by addition reaction.As for described monomer, can use two or more and the different monomer mixture of oxyalkylene group average mol that is added.As for suitable mixture, can be for example two kinds add average mol p differ and be no less than 10 the monomer (A3) of (p differ should not less than 20) mixture, be no less than the mixture that three kinds of p differed and be no less than 10 monomer (A3) of (p differ should not less than 20).And, for the scope of mixing the p value of using, can with add average mol p in the 40-300 scope monomer (A3) and be in monomer (A3) mixing in the 2-40 scope (p differ and is no less than 10, should be no less than 20), perhaps will add average mol p in the 20-300 scope monomer (A3) and the monomer (A3) that is in the 2-20 scope mix (p differs and is no less than 10, should be no less than 20).

As for above-mentioned R ⁶, if carbonatoms surpasses 30, the wetting ability of polycarboxylic acid multipolymer became strong, can not obtain good dispersive ability.From the viewpoint of dispersive ability, R ⁶Embodiment preferred is alkyl or the hydrogen atom that contains 1-20 carbon atom, better be contain be no more than 10 carbon atoms, be more preferably be no more than 3 carbon atoms, especially be no more than 2 carbon atoms alkyl.In order to reach emanate performance and make the air capacity that adds in the cement composition enough of good preventing, preferably contain the alkyl that is not less than 5 carbon atoms, preferably contain the alkyl that is no more than 20 carbon atoms.The alkyl that more preferably contains 5-10 carbon atom.In the described alkyl, preferred saturated alkyl and unsaturated alkyl.These alkyl can be straight chain or side chain.

Above-mentioned (alkoxyl group) polyglycol list (methyl) acrylate can be above-mentioned a kind of, but suitable is the esterification products of (methyl) vinylformic acid and alkoxyl group polyglycol, described alkoxyl group polyglycol adds to any Fatty Alcohol(C12-C14 and C12-C18) that contains 1-30 carbon atom by the oxyalkylene group that the 1-300 mole is contained 2-18 carbon atom, the reaction that contains the alicyclic alcohol (as hexalin) of 3-30 carbon atom and contain on the unsaturated alcohol of 3-30 carbon atom makes, and described Fatty Alcohol(C12-C14 and C12-C18) is methyl alcohol for example, ethanol, the 1-propyl alcohol, the 2-propyl alcohol, the 1-butanols, the 2-butanols, the 1-amylalcohol, the 2-amylalcohol, the 3-amylalcohol, the 1-hexanol, the 2-hexanol, the 3-hexanol, octanol, 2-ethyl-1-hexanol, nonyl alcohol, lauryl alcohol, the pure and mild stearyl alcohol of hexadecyl; Described unsaturated alcohol is (methyl) allyl alcohol, the pure and mild 3-methyl of 3-butene-1-3-butene-1 alcohol for example.

Be suitable for is given below those (methyl) vinylformic acid (alkoxyl group) polyoxyethylene glycol (polyglycol that contains 2-4 carbon atom) ester as esterification products:

Single (methyl) vinylformic acid methoxy poly (ethylene glycol) ester, single (methyl) vinylformic acid methoxyl group { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid methoxyl group { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid methoxyl group { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxyethyl group macrogol ester, single (methyl) vinylformic acid oxyethyl group { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid oxyethyl group { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxyethyl group { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid propoxy-macrogol ester, single (methyl) vinylformic acid propoxy-{ polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid propoxy-{ polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid propoxy-{ polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid butoxy macrogol ester, single (methyl) vinylformic acid butoxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid butoxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid butoxy { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid pentyloxy macrogol ester, single (methyl) vinylformic acid pentyloxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid pentyloxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid pentyloxy { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid hexyloxy macrogol ester, single (methyl) vinylformic acid hexyloxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid hexyloxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid hexyloxy { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in heptan base macrogol ester, single (methyl) vinylformic acid oxygen in heptan base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid oxygen in heptan base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in heptan base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid octyloxy macrogol ester, single (methyl) vinylformic acid octyloxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid octyloxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid octyloxy { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in ninth of the ten Heavenly Stems base macrogol ester, single (methyl) vinylformic acid oxygen in ninth of the ten Heavenly Stems base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid oxygen in ninth of the ten Heavenly Stems base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in ninth of the ten Heavenly Stems base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in last of the ten Heavenly stems base macrogol ester, single (methyl) vinylformic acid oxygen in last of the ten Heavenly stems base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid oxygen in last of the ten Heavenly stems base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid oxygen in last of the ten Heavenly stems base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid undecane oxygen base macrogol ester, single (methyl) vinylformic acid undecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid undecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid undecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid dodecyloxy macrogol ester, single (methyl) vinylformic acid dodecyloxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid dodecyloxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid dodecyloxy { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid tridecane oxygen base macrogol ester, single (methyl) vinylformic acid tridecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid tridecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid tridecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid tetradecyloxyaniline macrogol ester, single (methyl) vinylformic acid tetradecyloxyaniline { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid tetradecyloxyaniline { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid tetradecyloxyaniline { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid pentadecane oxygen base macrogol ester, single (methyl) vinylformic acid pentadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid pentadecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid pentadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid n-Hexadecane oxygen base macrogol ester, single (methyl) vinylformic acid n-Hexadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid n-Hexadecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid n-Hexadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid heptadecane oxygen base macrogol ester, single (methyl) vinylformic acid heptadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid heptadecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid heptadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid octadecane oxygen base macrogol ester, single (methyl) vinylformic acid octadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid octadecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid octadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid nonadecane oxygen base macrogol ester, single (methyl) vinylformic acid nonadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid nonadecane oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid nonadecane oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid cyclopentyloxy macrogol ester, single (methyl) vinylformic acid pentamethylene oxygen base { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid pentamethylene oxygen base { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid pentamethylene oxygen base { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid cyclohexyloxy macrogol ester, single (methyl) vinylformic acid hexamethylene alkoxyl group { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid hexamethylene alkoxyl group { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid hexamethylene alkoxyl group { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester.

As for above-mentioned list (methyl) vinylformic acid (alkoxyl group) polyglycol ester, suitable not only have the compound shown in the above-mentioned general formula (2), and also have single (methyl) vinylformic acid phenoxy group macrogol ester, single (methyl) vinylformic acid phenoxy group { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid phenoxy group { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid phenoxy group { polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid (methyl) allyloxy macrogol ester, single (methyl) vinylformic acid (methyl) allyloxy { polyoxyethylene glycol-(gathering) propylene glycol } ester, single (methyl) vinylformic acid (methyl) allyloxy { polyoxyethylene glycol-(gathering) butyleneglycol } ester, single (methyl) vinylformic acid (methyl) allyloxy polyoxyethylene glycol-(gathering) propylene glycol-(gathering) butyleneglycol } ester.

Be suitable for being not only list (methyl) vinylformic acid (alkoxyl group) polyglycol ester, and also have single toxilic acid (alkoxyl group) polyglycol ester, two toxilic acids (alkoxyl group) polyglycol ester etc. as above-mentioned polyglycol ester is monomeric.As for this monomer, suitable is as described below.

By the alkyl polyglycol with above-mentionedly go back half ester and the diester that the saturated dicarboxylic acid monomer forms, described alkyl polyglycol adds to the alcohol that contains 1-22 carbon atom by the oxyalkylene that contains 2-4 carbon atom with the 1-300 mole or contains on the amine of 1-22 carbon atom and makes; By half ester and diester that above-mentioned unsaturated dicarboxylic acid monomer and polyglycol form, the average mol that adds the alcohol that contains 2-4 carbon atom in the described polyglycol is 2-300; Two (methyl) vinylformic acid (gathering) diol ester is as two (methyl) vinylformic acid triglycol ester, two (methyl) vinylformic acid (gathering) glycol ester, two (methyl) vinylformic acid polypropylene glycol ester and two (methyl) vinylformic acid (gathering) ethylene glycol-(gathering) propylene glycol ester; Two toxilic acids (gathering) diol ester is as two toxilic acid triglycol esters and two toxilic acid macrogol esters etc.

Except above-mentioned monomer (A1), (A2), (B) with (A3), if need, the monomer component that is used to form polycarboxylic acid multipolymer of the present invention also comprises another monomer (C).Be suitable for as follows as another monomer (C).These may be used singly or in combin in them two or more.

Styrenic such as vinylbenzene, bromostyrene, chlorostyrene and vinyl toluene; Diene such as 1,3-butadiene, isoprene and iso-butylene; (methyl) acrylate is as (methyl) methyl acrylate, (methyl) ethyl propenoate, (methyl) butyl acrylate, (methyl) vinylformic acid pentyl ester, (methyl) Ethyl acrylate, (methyl) decyl acrylate and (methyl) lauryl acrylate; Alpha-olefin such as hexene, heptene and decene; Alkyl vinyl ether such as ethylene methacrylic ether, ethyl vinyl ether and butyl vinyl ether; Vinyl acetate such as vinyl-acetic ester; With allyl ester such as allyl acetate;

By above-mentioned unsaturated dicarboxylic acid monomer and contain diester that the alcohol of 1-22 carbon atom forms, by above-mentioned unsaturated dicarboxylic acid with contain diamines that the amine of 1-22 carbon atom forms and by above-mentioned unsaturated dicarboxylic acid monomer with contain the diester that the glycol of 2-4 carbon atom forms;

Difunctionality (methyl) acrylate is as two (methyl) vinylformic acid hexylene glycol ester, three (methyl) vinylformic acid trishydroxymethyl propyl ester and two (methyl) vinylformic acid trishydroxymethyl propyl ester; Unsaturated sulfonic acid such as vinyl sulfonic acid ester, (methyl) allyl sulphonic acid ester, 2-(methyl) acryloyl ethylsulfonic acid ester, 3-(methyl) acryloyl propyl sulfonic acid ester, 3-(methyl) acryloyl-2-hydroxypropyl sulphonate, 3-(methyl) propylene-2-hydroxypropyl sulfophenyl ether, 3-(methyl) acryloyl-2-hydroxyl propoxy-iodo-benzoic acid ester, 4-(methyl) acryloyl butyl sulfonic acid ester, (methyl) acrylamide methylsulphonic acid, (methyl) acrylamide ethylsulfonic acid, 2-methyl propane sulfonic acid (methyl) acrylamide and styrene sulfonic acid, and their univalent metal salt, divalent metal salt, ammonium salt and organic amine salt.

Unsaturated amine is as (methyl) acrylamide, (methyl) acryl alkylamide, N-methylol (methyl) acrylamide and N, N-dimethyl (methyl) acrylamide; Allylic cpd such as allyl alcohol; Unsaturated amino compounds is as (methyl) vinylformic acid dimethylamino ethyl ester; Vinyl Ether and allyl ethers such as methoxy poly (ethylene glycol) mono vinyl ether, polyoxyethylene glycol mono vinyl ether, methoxy poly (ethylene glycol) list (methyl) allyl ethers and polyethyleneglycol (methyl) allyl ethers;

(methyl) acrylic compound is as (methyl) Hydroxyethyl Acrylate, (methyl) vinylformic acid hydroxy propyl ester, (methyl) vinylformic acid methoxyl group ethyl ester, (methyl) vinylformic acid ethoxy ethyl ester, (methyl) vinylformic acid butoxyethyl group ethyl ester and (methyl) vinylformic acid methoxyl group propyl ester.

Now just prepare the method for polycarboxylic acid multipolymer of the present invention, will the method for the described monomer component of copolymerization be described as follows.

As for above-mentioned copolyreaction, can use any known polymerization process, as the solution polymerization or the mass polymerization of monomer component and polymerization starter as described in using.As for described polymerization starter, can use knownly, suitable is persulphate such as ammonium persulphate, Sodium Persulfate and Potassium Persulphate; Hydrogen peroxide; Azo-compound such as azo two-2-methyl propanamide hydrochloride and Diisopropyl azodicarboxylate; Superoxide such as benzoyl peroxide, lauroyl peroxide and cumene hydroperoxide etc.And, as for promotor, can be used in combination reductive agent such as sodium bisulfite, S-WAT, Mohr's salt, burnt sodium sulfite, formaldehyde sodium sulfoxylate and xitix; And amine compound such as quadrol, sodium ethylene diamine tetracetate and glycine etc.These polymerization starters and promotor can be used separately or can be used in combination two or more.

In above-mentioned copolymerization process, can use chain-transfer agent as required.Can be used as this chain-transfer agent be one or both or multiple known in the art those.But preferably use the hydrophobic chain transfer agent.

In above-mentioned copolymerization process, when described monomer component comprises one or more monomers with oxyalkylene group (A), promptly have the poly (alkylenimines) unsaturated monomer (A1) of oxyalkylene group and polyglycol unsaturated monomer (A2) and (A3) time, preferably use the hydrophobic chain transfer agent.When described monomer (A) with oxyalkylene group is polyglycol ester monomer and/or unsaturated alcohol-polyglycol adducts, be more preferably the hydrophobic chain transfer agent.When using described hydrophobic chain transfer agent, will introduce in the described multipolymer from the hydrophobic group of hydrophobic chain transfer agent.The described method for preparing the polycarboxylic acid multipolymer has constituted another aspect of the present invention, and described method comprises the monomer (A) that uses the copolymerization in the above described manner of hydrophobic chain transfer agent to comprise to have oxyalkylene group and the monomer component of unsaturated carboxylic acid monomer (B).

Also can bring into play function of the present invention by the polycarboxylic acid multipolymer that this method for preparing the polycarboxylic acid multipolymer obtains, and constitute another aspect of the present invention.

Be suitable for is to have the mercaptan compound or its solubleness in 25 ℃ of water that comprise the alkyl that is no less than 3 carbon atoms to be no more than 10% compound as above-mentioned hydrophobic chain transfer agent.Suitable is above-mentioned chain-transfer agent, amine-thiol chain transfer agents such as butyl sulfhydryl, spicy thioalcohol, decyl mercaptan, lauryl mercaptan, hexadecyl mercaptan, Stearyl mercaptan, cyclohexyl mercaptan, thiophenol, thiol octyl acetate, 2 mercaptopropionic acid monooctyl ester, 3-thiohydracrylic acid monooctyl ester, thiohydracrylic acid 2-ethylhexyl, sad 2-sulfydryl ethyl ester, 1,8-dimercapto-3,6-dioxo octane, the pure and mild lauryl mercaptan of decane trithio; Halogenide such as tetracol phenixin, carbon tetrabromide, methylene dichloride, bromofom and bromo trichloroethane; Unsaturated hydrocarbon compound such as α-Jia Jibenyixierjuwu, α-terpinene, γ-Song Youxi, limonene and terpinolene etc.These may be used singly or in combin two or more.Wherein, should contain and have the amine-thiol chain transfer agents that comprises the alkyl that is no less than 3 carbon atoms.

If need, above-mentioned hydrophobic chain transfer agent can be used in combination with one or both or multiple hydrophilic chain transfer agent.As for this hydrophilic chain transfer agent, can use known in the art those.Suitable is amine-thiol chain transfer agents such as mercaptoethanol, thioglycerin, thiol guanidine-acetic acid, thiohydracrylic acid, 2 mercaptopropionic acid, 3-thiohydracrylic acid, mercaptosuccinic acid and mistabrom; Primary alconol such as 2-amino third-1-alcohol; Secondary alcohol such as Virahol; Phosphoric acid, Hypophosporous Acid, 50 and salt thereof are (for example, sodium hypophosphite, potassium hypophosphite), sulfurous acid, hydrogen sulfurous acid, SODIUM HYDROSULPHITE, inclined to one side two sulfuric acid and their salt (for example, S-WAT, sodium bisulfite, V-Brite B, sodium metabisulfite, potassium sulfite, Potassium hydrogen sulfite, potassium hyposulfite, Potassium hydrogen sulfite) partially and similarly lower oxyde and salt.

As for the method that above-mentioned chain-transfer agent is added in the reaction vessel, can use continuous adding method as drip and add in batches.Described chain-transfer agent can join separately in the reaction vessel, perhaps in advance with the monomer with oxyalkylene group (A) or the mixing such as unsaturated carboxylic acid monomer (B), solvent that constitute described monomer component.

Can carry out above-mentioned copolyreaction in batches or continuously.Solvent (situation about needing in the copolymerization step) as for using can use any known solvent, and suitable be water; Alcohol is as methyl alcohol, ethanol and Virahol; Aromatics or aliphatic hydrocarbon such as benzene,toluene,xylene, hexanaphthene and normal heptane; Ester such as ethyl acetate; Ketone such as acetone and methylethylketone.These may be used singly or in combin two or more.Wherein, from the solubleness and the product polycarboxylic acid multipolymer of described monomer component, should use to be selected from water and to contain one or both or multiple solvent in the lower alcohol of 1-4 carbon atom.

As for described monomer component and polymerization starter etc. are added method in the reaction vessel with above-mentioned copolymerization process, suitable is to comprise all monomers are added in the reaction vessel, then toward wherein adding the method that polymerization starter carries out copolyreaction; Comprise some monomer components are added in the reaction vessel, then toward wherein adding the method that polymerization starter and residual set of monomers assign to carry out copolyreaction; And comprise polymer solvent is added in the reaction vessel, then toward wherein adding the method that all monomer components and polymerization starter carry out copolyreaction.In these methods, because the molecular weight distribution very narrow (sharply) of product multipolymer, preferably include by in reaction vessel, dripping the method that polymerization starter and monomer carry out copolyreaction continuously, can improve the cement dispersiveness thus, to improve the flowability of cement composition.

In above-mentioned copolymerization process, can roughly select described copolyreaction temperature and other copolyreaction condition by method, solvent, polymerization starter and the chain-transfer agent of employed copolyreaction.Usually the temperature of preferred described copolyreaction is not less than 0 ℃, is not higher than 150 ℃.Preferably is, is not less than 40 ℃, is more preferably and is not less than 50 ℃, especially is not less than 60 ℃, and still, it better is not to be higher than 120 ℃, is more preferably not to be higher than 100 ℃, especially is not higher than 85 ℃.

Can use by above-mentioned copolyreaction method and make the main ingredient of multipolymer as cement admixture.When needs, can after further with the alkaline matter neutralization, use.What should be used as alkaline matter is inorganic salt such as monovalence and divalent metal oxyhydroxide, muriate and carbonate; Ammonia and organic amine etc.

In above-mentioned copolymerization process, the copolyreaction of monomer component should be carried out under above-mentioned unsaturated carboxylic acid monomer (B) neutralizes the degree of 0-60%.The degree of neutralization of unsaturated carboxylic acid monomer represents that with the molecular fraction of unsaturated carboxylic acid monomer in the salt form (B), the total mole number of unsaturated carboxylic acid monomer (B) is regarded 100 moles of % as here.When the degree of neutralization of unsaturated carboxylic acid monomer (B) surpassed 60 moles of %, the polymeric degree can not raise in the copolymerization step, so product multipolymer possibility molecular weight is lower, and productive rate also can reduce.Be preferably, be no more than 50 moles of %, be more preferably and be no more than 40 moles of %, be more preferably and be no more than 30 moles of %, especially good is to be no more than 20 moles of %, preferably is no more than 10 moles of %.

Being suitable in the method for using above-mentioned unsaturated carboxylic acid monomer (B) to carry out copolyreaction under the degree of neutralization of 0-60 mole % is to be included in the unsaturated carboxylic acid monomer (B) that does not carry out making under the neutral condition all sour forms, promptly all unsaturated carboxylic acid monomers (B) (wherein, M in the above-mentioned general formula (1) is a hydrogen atom) method of carrying out copolymerization, form after salt form such as sodium salt or the ammonium salt method that under the degree of neutralization of 0-60 mole %, makes unsaturated carboxylic acid monomer (B) carry out copolymerization with comprising neutralizing with alkaline matter.

As mentioned above, can obtain polycarboxylic acid multipolymer of the present invention by comonomer component.As for the molecular weight of this multipolymer, determine and should be not less than 500 but be not higher than 500,000 with the weight-average molecular weight (Mw) that polyoxyethylene glycol equivalent benchmark is represented by gel permeation chromatography (hereinafter referred to as " GPC ").When being lower than 500, the diminishing capacity of polycarboxylic acid multipolymer can reduce, and when being higher than at 500,000 o'clock, the diminishing capacity of polycarboxylic acid multipolymer and the effect of losing that prevents to cave in can reduce.Better be to be not less than 5,000, be more preferably and be not less than 8,000.And better be not to be higher than 300,000, be more preferably and be not higher than 100,000.In this manual, the weight-average molecular weight of multipolymer is definite value under following given gpc measurement condition.

In order to analyze the cement admixture that comprises in the multipolymer of the present invention, feasible method is that (1) is analyzed under the condition of not carrying out any processing, the method that (2) are analyzed after low molecular compound such as residual monomer and water-fast material such as defoamer are removed.Method shown below is suitable for the method as the described polymkeric substance of purifying.

The polymer purification condition

Polymer purification condition 1

1. use the NaOH aqueous solution of 30 weight % that pH is transferred to 12-12.5.

2. use vaporizer to concentrate cement admixture (polymers soln), in 50 ℃ vacuum drier, be evaporated to drying then.

3. use soxhlet's extractor with the material that solvent (for example, Anaesthetie Ether, sherwood oil) extraction makes thus, be separated into soluble part and insoluble part.

4. insoluble part is made into the solution of the about 40-50 weight of concentration %, then solution is carried out dialysis or ultrafiltration, to remove low molecular weight compositions, as residual monomer etc.The molecular weight boundary of material to be separated is selected (1000,3500,8000,15000) according to the molecular weight of the residual monomer that GPC determines.

Polymer purification condition 2

1. the NaOH aqueous solution with 30 weight % transfers to 12-12.5 with pH.

2. concentrate cement admixture (aqueous solutions of polymers) with vaporizer, in 50 ℃ of vacuum driers, be evaporated to drying then.

3. extract the material that makes thus with soxhlet's extractor with solvent (for example Anaesthetie Ether, sherwood oil), be separated into soluble part and soluble part.

4. use ultra-filtration membrane (boundary molecular weight 6,000) to make cement admixture carry out ultrafiltration.Select the boundary molecular weight according to the molecular weight (13,000) of residual monomer among the GPC.The cycling rate of telomerized polymer solution makes the pressure of ultra-filtration membrane top hole pressure and ultra-filtration membrane import be not less than 0.01MPa.

Filtrate concentration: be adjusted to 0.1-10 weight %

Terminal point: remove residual monomer with affirmations such as NMR, liquid chromatographies.

Ultra-filtration equipment

Funakoshi：FILTRATION SYSTEM PS-24001

Beam (pencil) pattern piece (product of Asahi Kasei Co.)

Model: AIP-0013

Material: hollow-fibre membrane: polyacrylonitrile (PAN)

Shell: polysulfones

Tackiness agent: Resins, epoxy

Specification: film internal diameter (mm): 0.8mm

The quantity of used film: 100 films

Effective film area (cm ²): 170

Nominal boundary molecular weight: 6,000

Working conditions: maximum working pressure (kPa): 100

Significant temp (℃): 50

Effective pH scope: 2-10

Module size (mm): 20 φ * 130L

As mentioned above, make polycarboxylic acid multipolymer of the present invention by comonomer.In solid matter, the TCAV of this multipolymer or cement admixture (total carboxylic acid's value) should be not less than 3mg KOH/g, and is no more than 900mg KOH/g.When it was lower than 3mg KOH/g, the polycarboxylic acid multipolymer was adsorbed onto speed on the cement with slack-off, made need reach the diminishing capacity for a long time and/or can reduce the diminishing capacity.If surpass 900mgKOH/g, the speed that the polycarboxylic acid multipolymer is adsorbed onto on the cement will become too fast, and cement granules is reunited, and can reduce the diminishing capacity and the effect of the loss that prevents to cave in.Better be to be not less than 5mg KOH/g, be more preferably and be not less than 10mg KOH/g, suitable more is to be not less than 15mg KOH/g, especially suitable is to be not less than 20mg KOH/g, preferably be not less than 25mg KOH/g, and it better is no more than 500mg KOH/g, be more preferably and be no more than 400mg KOH/g, suitable more is to be no more than 300mg KOH/g, and especially suitable is to be no more than 200mg KOH/g, preferably is no more than 150mg KOH/g.In this manual, the value that records under the measuring condition of the described TCAV TCAV (total carboxylic acid's value) that is hereinafter to be given.

As for the NMR-PEG content of polycarboxylic acid multipolymer of the present invention, should be not less than 10 weight %, should not surpass 99 weight %.If be lower than 10 weight %, be used to disperse the cement particulate to disperse the quantitative change of group few, so just make cement granules reunite, and can reduce the diminishing capacity and increase intractability.When it surpassed 99 weight %, the polycarboxylic acid multipolymer was adsorbed onto speed on the cement with slack-off, makes need reach the diminishing capacity for a long time and/or can reduce the diminishing capacity.Better be to be not less than 50 weight %, be more preferably and be not less than 60 weight % that suitable more is to be not less than 65 weight %, especially suitable is to be not less than 70 weight %.And be preferably it and be no more than 98 weight %, be more preferably and be no more than 97 weight %, suitable more is to be no more than 95 weight %, and especially suitable is to be no more than 93 weight %, preferably is no more than 93 weight %.In this manual, described NMR-PEG content is by the measured value of NMR-PEG content measuring method shown in hereinafter.

In polycarboxylic acid multipolymer of the present invention, comprise the form that the monomer component of poly (alkylenimines) unsaturated monomer (A1) and unsaturated carboxylic acid monomer (B) makes by copolymerization and should have the nitrogen content that is not less than 0.001 weight % and is no more than 20.0 weight %.When it was lower than 0.001 weight %, the weight percentage of poly (alkylenimines) unsaturated monomer diminished, and had wherein used the cement composition of described multipolymer to become and had been difficult to carrying.When surpassing 20 weight %, the amine content of polycarboxylic acid multipolymer uprises, and in multipolymer and the effect of carbonyl generation intensive, may reduce the diminishing capacity thus.Better be to be not less than 0.01 weight %, be more preferably and be not less than 0.05 weight % that suitable more is to be not less than 0.1 weight %, especially suitable is to be not less than 0.5 weight %, preferably is not less than 1.0 weight %.And it better is to be no more than 15.0 weight %, is more preferably and is no more than 10.0 weight %, and suitable more is to be no more than 8.0 weight %, and especially suitable is to be no more than 5.0 weight %, preferably is no more than 3.0 weight %.

Below listed GPC molecular weight measurement condition in the invention process process, ¹H-NMR (400MHz, 200MHz) measuring condition, ¹³C-NMR measuring condition, IR measuring condition, pyrolysis GC-MASS measuring condition, solids content measuring condition and NMR-PEG content measurement condition.

GPC molecular weight measurement condition

Used packed column: Tosoh TSk buffering packed column SWXL+TSK gel

G4000SWXL+G3000SWXL+G2000SWXL

Elutriant: sodium acetate trihydrate (115.6g) is dissolved in comprises 10,999g water and 6 in the mixed solvent of 001g vinyl cyanide, and further is adjusted to pH6.0 with described solution with 30% aqueous sodium hydroxide solution, as elutriant.

Sampling volume: 100 microlitres

Sample concentration: 0.5 weight %

Elutriant flow: 0.8 milliliters/second

Packed column temperature: 35 ℃

Standard specimen: polyoxyethylene glycol, weight-average molecular weight (Mw) 272,500,219,000,85,000,46,000,24,000,12,600,4,250,7,100,1,470

Detector: Waters, Japanese differential refractive index detector

Analysis software: Waters, Japanese MILLENNIUM Ver.2.18

＜ ¹H-NMR measuring condition (400MHz) 〉

Model: Varian ' s Unity plus (400MHz)

Probe: four utmost point auto-switch probes

Observation target nucleus: proton (resonant frequency 400.0)

Measuring condition: 90-degree pulse 22.5 microseconds (45 degree impulse radiation)

3.0 seconds waiting time

Accumulate 16 times

＜ ¹H-NMR measuring condition (200MHz) 〉

Model: Varian ' s Geminin 2000 (200MHz)

Probe: CH switch probe

Observation target nucleus: proton (resonant frequency 199.9)

Measuring condition: 90-degree pulse 10 microseconds (45 degree impulse radiation)

1.25 seconds waiting time

Accumulate 16 times

＜ ¹³C-NMR measuring condition 〉

Model: Varian ' s Unity plus (400MHz)

Probe: four utmost point auto-switch probes

Observation target nucleus: carbon nuclear (resonant frequency 100.6)

Measuring condition: 90-degree pulse 15.1 microseconds (with 1/3 90 degree impulse radiations)

¹H pulse output 38dB

0.939 second waiting time

Accumulate 25,000 times

＜IR measuring condition 〉

Model: BIO-RAD ' s FT-IR

Measuring method: germanium dish film formation method

(about 0.03 milliliter) 5% aqueous copolymers solution is dripped on the germanium dish.The dry-off moisture (25 ℃, 0.001MPa or lower, 10 minutes or longer) of in vacuum drier, (can selecting to use the moisture eliminator that is connected on the vacuum pump).

＜TCAV (total carboxylic acid's value) measuring condition 〉

Model: Hiranuma Sangyo automatic titrator COM-550

The 0.1 mol sodium hydroxide (reagent of Wako Pure Chemical Industries) that is used for volumetric analysis, fn (factor)

The 0.1 mol hydrochloric acid (reagent of Wako Pure Chemical Industries) that is used for volumetric analysis,

Solvent: deionized water/vinyl cyanide=50/50 (volume %)

(1) in 100 ml beakers accurately (behind the radix point four) weighing 1 gram cement admixture (counting the 0.2-0.5 gram with solid matter) (Wg).

(2) with the material in 50 milliliters of solvent cut beakers.

(3) add above-mentioned aqueous hydrochloric acid (5 milliliters), confirm that pH was not higher than for 3 (should not be higher than 2.5) afterwards, use above-mentioned aqueous sodium hydroxide solution to carry out potentiometric titration.

(4) needed amount of sodium hydroxide (V milliliter) during determining from first flex point to second flex point.

The fn:0.1 mol oxyhydroxide factor

NV (weight %): solid substance concentration in the cement composition

TCAV＝(V×0.1×fn×56.11)/(W×NV)mg KOH/g

＜pyrolysis GC-MASS measuring condition 〉

Pyrolysis gas chromatography-mass spectroscopy

Model: Hitachi N-5000, four polar forms

Packed column: GL Science ' s DB-l (0.25mm * 30m * 0.25 μ m)

590 ℃ of Curie-point pyrolyzer measuring methods

Heating schedule :-150 ℃ of 50 ℃ of (keeping 5 minutes)-(5 ℃/minute)-(10 ℃/minute)-250 ℃ (keeping 5 minutes)

＜solids content measuring condition 〉

Accurately weighing about 0.5 restrains cement admixture in the aluminium cup.Under nitrogen gas stream, heating was taken out the aluminium cup after 1 hour in 130 ℃ moisture eliminator, and cooling is 10 minutes in moisture eliminator, weighs then.Calculate solids content according to the weight of the cement admixture that weighs up and the weight of heating back residue.

＜NMR-PEG content measurement condition 〉

As ¹Observed during H NMR (200MHz) measures, determine at the peak at 3.3-4.2ppm place weight percentage (appear at methacrylic acid methoxy base polyoxyethylene glycol-OCH ₂CH ₂-the peak of peak same position).

Measure summary: use calibration curve, determine to be contained in the polymkeric substance weight percentage at peak, 3.3-4.2ppm place according to the ratio of weight ratio between polymkeric substance and the interior mark material (trioxane) and NMR integrated value.

Preparation polymkeric substance: remove after the residual monomer by dialysis etc., in vacuum drier, described polymkeric substance drying to its moisture content is no more than 0.1 weight %.Carry out purifying, make in NMR 4.9-5.2ppm place any other peak not occur.

Trioxane: the one-level reagent of Wako Pure Chemical Industries is adjusted to moisture content and is no more than 0.05 weight %.

Moisture content measuring method: Karl Fishcher method

Be used to set up the material of calibration curve: pre-determine-OCH ₂CH ₂-with the weight ratio of polymer A or methacrylic acid methoxy base polyoxyethylene glycol gross weight.

Above-mentioned polymer A: " Shin-Nakamura Kagaku product, M-90G/ sodium methacrylate=70/30 (weight %), Mw20,000-30,000 " accurately determines initiator, chain-transfer agent, residual monomer and material purity etc., pre-determines-OCH ₂CH ₂The weight ratio of-relative gross weight.

Weight: weighing is accurate to 0.1 milligram.

Polycarboxylic acid multipolymer of the present invention is suitable for the main ingredient as cement admixture.The cement admixture that comprises polycarboxylic acid multipolymer of the present invention also constitutes one aspect of the present invention.

The calcium branch value can provide the cement composition of easier carrying for 10-900mPas and/or cement coefficient of refrigeration for the cement admixture of 0.05-1.0, even when mobile when identical with the diminishing capacity.This cement admixture has also constituted another feature of the present invention.

As described herein, the method for determining calcium branch value and cement coefficient of refrigeration below will be described.

＜cement coefficient of refrigeration measuring method 〉

Reagent and appointed condition

Ordinary Portland cement (JIS R 5210): using viscosity, mu (e) (following defined) is 5,000-6, the cement batch of material of the Taiheiyo Cement of 000mPas.

Defoamer: oxyalkylene defoamer, the ninth of the ten Heavenly Stems oxygen base polypropylene glycol-polyoxyethylene glycol (add propylene oxide average mol by 20, the average mol of adding oxyethane be 3), with respect to the amount of solid matter, add cement admixture amount adopt amount with 0.5 weight %.

The standard sand of strength of cement test usefulness: JIS R 5201

Plaster mixer: Howard N-50 type, capacity are 5 liters

Rotating speed 1: rotation 139rpm, revolution 61rpm

Rotating speed 2: rotation 285rpm, revolution 125rpm

Scraper: make by stainless steel, with reference to figure 2

Teraoka ' s Newdes cup (300 milliliters): with reference to figure 3

Helipath rotational viscosimeter: TV-20 type

Viscometer/rotating shaft T-A/10rpm (Toshi Sangyo product)

The add-on of cement admixture: in all cases, in the add-on of solid matter

Air content measurement method: about 450 milliliters of plaster are added in 500 milliliters of graduated graduated cylinders measurement volumes and weight.Density with used cement, sand and deionized water is the basic calculation air content.

Measuring method

Place the plaster agitator with being used for the standard sand that strength of cement tests at the ordinary Portland cement of 25 ℃ of following damping (1080 gram) and 1350 grams respectively, after rotation stirring in 10 seconds, the cement admixture and the defoamer that add 1270 gram deionized waters (25 ℃) and predetermined amount, continue to stir 1-3 minute with rotating speed 1, stirred 2 minutes with rotating speed 2 afterwards, form mixture C.

Whole mixture C is placed plastic cylinder container (1.2 liters of capacity, 90 millimeters of lower end diameter, upper end diameter are 110 millimeters, highly are 140 millimeters), finish stirring after 1 minute 20 seconds, use scraper with in 5 seconds to the right 5 times and left 5 times mode stir described mixture once more.1/3 of described mixture C is added the miniature slump cone be positioned on the Stainless Steel Disc (upper diameter is that 50 millimeters, lower diameter are 100 millimeters, highly is 150 millimeters), and smash with the glass stick spiral and to stir 25 times.Clog 1/3 more in the same manner, and smash with glass stick and to stir 25 times.Clog remaining 1/3 in an identical manner.After the 10 minute total time that begins to stir, each miniature slump cone of vertical-lift, and measure " maximum length " and " length orthogonal " that mixture C is sprawled with it on Stainless Steel Disc, the mean value that writes down these two values is as flow valuve (mm).

Air content is adjusted under the condition of 2.0-4.0 volume %, with respect to ordinary Portland cement, the add-on of described cement admixture (in solid matter) has nothing in common with each other, graph of a relation between the add-on of drawing and the flow valuve (mm) is defined as providing the add-on of the required cement admixture of 200mm flow valuve.(add-on in this case is defined as " standard add-on ".) the flow valuve scope planted agent that measures at 200 ± 25mm of described flow valuve repeats twice at least, at the flow valuve scope planted agent of 200 ± 50mm triplicate at least.When described air content did not drop in the scope of 2.0-4.0 volume %, the amount of defoamer was not 0.5 weight %, determines the add-on of defoamer and cement admixture, and flow valuve and air content are all dropped on separately in the specialized range.

Then, 600g is added in the plaster mixer at 25 ℃ of ordinary Portland cements of nursing one's health down, and after 10 seconds, add 150g deionized water (25 ℃), add cement admixture and defoamer respectively with above-mentioned determined standard add-on simultaneously with rotating speed 1 stirring.Mixed 50 seconds, and, adhered to cement paste on the plaster mixer wall and in 30 seconds, break into pieces and peel off then in case after stopping.Then, with rotating speed 1 restir 3 minutes 40 seconds, form mixture D.

Whole mixture D is placed Teraoka ' s Newdes cup (300 milliliters), and use scraper with in 60 seconds 30 times to the right, 30 times mode stirs left, obtains uniform cement paste agent dispersion.

Knead described mixture after d to 10 minute total time from beginning machinery, begin to measure viscosity at Helipath rotational viscosimeter (position adjustments to 175 of rotating shaft milliliter scale=count from the bottom high 3.8 centimetres).Measure viscosity during after beginning to measure viscosity 2 minutes, be recorded as viscosity, mu (d).

600 gram ordinary Portland cements and 240 gram deionized waters are added in the plaster mixer (not adding cement admixture and defoamer), stir, form mixture E to stir identical mode with mixture D.Measure viscosity in the mode identical with mixture D, and the viscosity when measuring after beginning viscosity is surveyed the Portland amount 2 minutes.Measurement is carried out 2 times, and the mean value of two values of record is as viscosity, mu (e).The ratio of viscosity, mu (d)/viscosity, mu (e) is recorded as the cement coefficient of refrigeration.

＜calcium branch value measuring method 〉

Reagent and appointed condition

Lime carbonate: the product of Nippon Funka Kogyo, SS#80

Calcium hydroxide: the product of Wako Pure Chemical Industries

Toyoura quartz sand: the product of Toyoura Keiseki Kogyo

Plaster mixer: Howard N-50 type, capacity are 5 liters

Rotating speed 1: rotation 139rpm, revolution 61rpm

Rotating speed 2: rotation 285rpm, revolution 125rpm

Scraper: make by stainless steel, with reference to figure 2

Teraoka ' s PACK-ACE (600 milliliters)

The intimate mixing device: 1,000rpm; With reference to figure 4

Brookfield viscometer: rotation number 6rpm, rotor No.2; After setting 30 seconds, rotor begins rotation.

The add-on of cement admixture: in all cases, in the add-on of solid matter

Measuring method

With down the lime carbonate of conditioning (300 gram) and 0.3 gram calcium hydroxide and 250 restrain the Toyoura quartz sands and places plaster mixer at 25 ℃ respectively, stir after 30 seconds with rotating speed 1, the cement admixture that adds 75 gram deionized waters (25 ℃) and predetermined amount, under the condition of rotating speed 2 integral body was further stirred 5 minutes, form mixture A.

Whole mixture A is placed plastic cylinder container (1.2 liters of capacity, 90 millimeters of lower end diameter, upper end diameter are 110 millimeters, highly are 140 millimeters), added after the deionized water 30 minutes and 58 minutes, use scraper with in 30 seconds to the right 15 times also left 15 times mode stir described mixture.

Described mixture A added to place diameter on the stainless steel disk be the hollow cylinder of 55 millimeters and 50 millimeters.After the adding deionized water 1 hour, the vertical-lift cylindrical vessel, and measure " maximum length " and " length orthogonal " that mixture is sprawled with it on Stainless Steel Disc, the mean value that writes down these two values is as flow valuve (mm).

By changing the add-on (in solid matter) of cement admixture, determine the add-on that provides the 160mm flow valuve required with respect to lime carbonate.(this add-on is defined as " standard calcium add-on ".)

Then, place Teraoka ' s PACK-ACE (600ml) (plastic cylinder container with 75 gram deionized waters (25 ℃) and at the 25 ℃ of 300 gram lime carbonate nursed one's health down and the cement admixtures of standard calcium add-on, upper end diameter is 87mm, lower end diameter is 80mm, highly be 120mm), use stainless steel bar (width 9m, thickness 2mm) in 3 minutes, also to stir for 90 times for 90 times then to the right left, and, form mixture B with intimate mixing device restir 9 minutes.

Transferring to 100ml threaded pipe (Glass Containers, diameter 35mm, height 100mm) before, in 25 ℃ of waters bath with thermostatic control, mixture b is nursed one's health, and use stainless steel bar (width 9m, thickness 2mm) in 3 minutes, also stirs for 180 times left for 180 times to the right, before transferring to the 100ml threaded pipe, obtain enough divided calcium carbonate prose style free from parallelisms.In the 100ml threaded pipe, add mixture B to height 80mm.Use Brookfield viscometer to measure the viscosity of mixture B from beginning to stir after 60 minutes with the intimate mixing device, and the value of record rotation beginning in the time of 180 seconds, as the calcium branch value.

Above-mentioned cement admixture has shown that the calcium branch value is that 10-900mPas and/or cement coefficient of refrigeration are 0.05-1.0.

When in cement composition, using above-mentioned cement coefficient of refrigeration to surpass 1.0 cement admixture, but the application property variation of described composition, and be difficult to carrying.The cement composition that uses the cement coefficient of refrigeration to be lower than 0.05 cement admixture is easy to be separated into cement paste and granule (sand, stone), a large amount of water of emerging, and becoming is difficult to carry.Described coefficient value should be not less than 0.05, better is to be not less than 0.1, is more preferably and is not less than 0.2.And it should not surpass 0.95, better is to be no more than 0.90, is more preferably and is no more than 0.85, especially should not surpass 0.80.

When using above-mentioned calcium branch value to surpass the cement admixture of 90mPas in cement composition, the viscosity of described composition increases, and becomes to be difficult to carrying.It is low to use the calcium branch value to be lower than the cement composition viscosity of cement admixture of 10mPas, and separate easily becomes cement paste and granule (sand, stone), a large amount of water of emerging, and becoming is difficult to carry.Described value should be not less than 10mPas, but is no more than 850mPas.Especially suitable is to be not less than 50mPas, preferably is not less than 100mPas.And it better is to be no more than 800mPas, is more preferably and is no more than 750mPas, especially should not surpass 700mPas, preferably is no more than 650mPas.

When after transferring to pH12-12.5, carrying out purifying, cement admixture also can provide the cement composition of being convenient to carry, at this moment mobile and diminishing capacity is in same levels, and the nitrogen content of described cement admixture is measured as 0.1-20 weight % through ultimate analysis, detects morpholine, 4-(2-hydroxyethyl) morpholine and 1 in pyrolysis GC-MASS, the 4-diox, not having replat at the GPC medium wave peak, is 5 in weight-average molecular weight (Mw) shown in the IR measurement, 000-300,000, it is at 1640-1660cm ^-1The intensity of place's absorption peak is no more than at 1710-1630cm ^-120% of place's absorption peak, ¹³Among the C-NMR, to signal, NMR-PEG content is 10-99 weight %, and TCAV is 3-900mg KOH/g at the chemical shift position sensing of 60-61ppm and 69-68ppm.This cement admixture has also constituted another aspect of the present invention.

When the above-mentioned nitrogen content of comprehensive evaluation, pyrolysis GC-MASS, IR and ¹³During the C-NMR measuring result, show that described cement admixture comprises above-mentioned poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group.Like this, the cement admixture that drops in the above-mentioned respective range of described these analytical values comprises above-mentioned poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group.And GPC provides a peak, and promptly crest does not have replat, shows that the poly (alkylenimines) unsaturated monomer (A1) with oxyalkylene group is in copolymerized state, is not only admixture.Described IR measurement has shown the existence of amido linkage, and shows not have any polyamine monomer of copolymerization or acrylamide etc., but copolymerization have a poly (alkylenimines) unsaturated monomer (A1) of oxyalkylene group.

When carrying out purifying by the following stated method, above-mentioned cement admixture provides the analytical value that drops in above-mentioned each scope.

(cement admixture purification process)

1. use the NaOH aqueous solution of 30 weight % that pH is transferred to 12-12.5.

2. use vaporizer to concentrate cement admixture (aqueous solutions of polymers), in 50 ℃ vacuum drier, be evaporated to drying then.

3. use soxhlet's extractor with the material that solvent (for example, Anaesthetie Ether, sherwood oil) extraction makes thus, be separated into soluble part and insoluble part.

4. insoluble part is made the solution that concentration is about 40-50 weight %, carry out dialysis or ultrafiltration then, remove low-molecular-weight component, as residual monomer etc.Select boundary molecular weight (1,000,3,500,8,000,15,000) according to the molecular weight of residual monomer among the GPC.

Of the present invention this on the one hand in, pyrolysis GC-MASS, GPC, IR, ¹³The measuring condition of C-NMR, TCAV and NMR-PEG content is identical with the measuring condition of above-mentioned polycarboxylic acid multipolymer.

If be lower than 0.1 weight % with nitrogen content after the aforesaid method purifying in ultimate analysis, described cement admixture makes the cement composition that has wherein used this cement admixture be difficult to carrying, if described nitrogen content surpasses 20 weight %, the diminishing capacity may reduce.Described nitrogen content should be not less than 0.5 weight %, better is not less than 1.0 weight %.And it better is to be no more than 10 weight % to be no more than 15 weight %, is more preferably and is no more than 8 weight %, especially should not surpass 3 weight %.Described nitrogen content is the nitrogen-atoms weight ratio with respect to the solid matter of 100 weight % in the cement admixture.

When in above-mentioned pyrolysis GC-MASS, detect morpholine in the cement admixture,, 4-(2-hydroxyethyl) morpholine and 1, during the 4-diox, wherein used the carrying easily that becomes of the cement composition of this cement admixture.

In GPC, above-mentioned cement admixture requires to show the crest that does not have replat.Term " crest that does not have replat " is meant, as shown in Figure 1, the terminal point from the starting point of crest to crest in GPC figure has only two flex points.As for weight-average molecular weight (Mw), if be lower than 5,000, then the diminishing capacity can reduce, if surpass 300,000, the diminishing capacity can reduce with the effect that prevents the avalanche loss.It should be lower than 8,000, preferably is lower than 10,000.And it should not surpass 300,000, preferably is no more than 500,000.Described weight-average molecular weight is the value that records under above-mentioned gpc measurement condition.

In IR measured, above-mentioned cement admixture showed that it is at 1640-1660cm ^-1The intensity of place's absorption peak is no more than at 1710-1630cm ^-120% of place's absorption peak.This means and in multipolymer, have amido linkage hardly.Suitable is, at 1640-1660cm ^-1The intensity of place's absorption peak is no more than at 1710-1630cm ^-115% of place's absorption peak strength better is to be no more than 10%, is more preferably and is no more than 5%, and especially suitable is to be no more than 3%.

Above-mentioned ¹³Among the C-NMR, when at the chemical shift position sensing of 60-61ppm and 69-68ppm during, use the carrying easily that becomes of the cement composition of this cement admixture to signal.

When above-mentioned NMR-PEG content is lower than 10 weight %, be used to disperse the cement particulate to disperse the amount of group not enough, make and reduced the reunion that cement granules occurs the diminishing capacity thus and increased the carrying difficulty.When surpassing 99 weight %, need just can show for a long time the diminishing ability or reduce the diminishing capacity.Suitable is, is not less than 50 weight %, better is to be not less than 60 weight %, is more preferably and is not less than 65 weight %, especially is not less than 70 weight %.And it should not surpass 98 weight %, better is to be no more than 97 weight %, is more preferably and is no more than 95 weight %, especially is no more than 93 weight %, preferably is no more than 93 weight %.

When above-mentioned TCAV is lower than 3mg KOH/g, needs just can show for a long time the diminishing ability or reduce the diminishing capacity.When it surpassed 900mg KOH/g, cement granules can be reunited, and reduced the diminishing capacity thus and prevented avalanche loss effect.It should not be lower than 5mg KOH/g, better is to be not less than 10mg KOH/g, is more preferably and is not less than 15mgKOH/g, especially is not less than 20mg KOH/g, preferably is not less than 25mg KOH/g.And it should not surpass 500mgKOH/g, better is to be no more than 400mg KOH/g, is more preferably and is no more than 300mg KOH/g, especially is no more than 200mg KOH/g, preferably is no more than 150mg KOH/g.

As for the preferred embodiment of cement admixture or cement composition, can mention above-mentioned (1) and comprise the embodiment that comprises the polycarboxylic acid multipolymer that the monomer component of poly (alkylenimines) unsaturated monomer (A1) and unsaturated carboxylic acid monomer (B) makes by copolymerization; (2) comprise the embodiment that comprises the polycarboxylic acid multipolymer that the monomer component of polyglycol unsaturated monomer (A2) and unsaturated carboxylic acid monomer (B ') makes by copolymerization; (3) comprise the embodiment that comprises the polycarboxylic acid multipolymer that the monomer component of polyglycol unsaturated monomer (A2 ') and unsaturated carboxylic acid monomer (B) makes by copolymerization; (4) comprise the embodiment that makes the polycarboxylic acid multipolymer by the monomer component of the monomer (A) that uses the copolymerization of hydrophobic chain transfer agent to comprise to have oxyalkylene group and unsaturated carboxylic acid monomer (B); The calcium branch value of described cement admixture is that 10-900mg KOH/g and/or cement coefficient of refrigeration are 0.05-0.9; Be adjusted to after pH12-12.5 and the purifying, the analytical value of described cement composition drops in above-mentioned each scope.In this case, the preferred embodiment of polycarboxylic acid multipolymer is identical with above-mentioned those.Promptly, in embodiment (1), above-mentioned poly (alkylenimines) unsaturated monomer (A1) should have oxyalkylene group, and in embodiment (1), (2) and (3), above-mentioned monomer component should comprise above-mentioned monomer polyglycol unsaturated monomer (A3) in addition with oxyalkylene group.Described embodiment (1), (2), (3) and (4) can suitably be mixed.

Cement admixture of the present invention below is described.

Cement composition such as cement paste, plaster and concrete etc. can add together with above-mentioned cement admixture, and use.

Suitable above-mentioned cement composition is usually the used composition that comprises cement, water, fine granular, thick granule etc.These can add together with fine powder such as dust, blast-furnace slag, silicon ash, liquefaction silicon ash and Wingdale.This composition that comprises water, cement and cement admixture has at least also constituted one aspect of the invention, and described used cement admixture is exactly described cement admixture.

Suitable above-mentioned cement is silicate cements such as common, Gao Kuaigu, superelevation are solid soon, middle heat, white; Fusion silicate cement kind such as high alumina cement, silicate dust cement, silicate portland blast-furnace slag cement, pyrolytic silicon dioxide cement, high workability cement etc.As for every m ³The formula ratio of cement described in the concrete and unit water-content (being used to prepare high-durability and strong concrete), described unit water-content is preferably 100-185kg/m ³, the ratio of water/cement is 10-70%.Be preferably, the unit water-content is 100-175kg/m ³, the ratio of water/cement is 10-65%.What can be used as granule is gravel, rubble, water slag, circulation granule, fire-resistant granule etc.

The method that above-mentioned cement admixture is added in the cement composition there is not particular restriction.As for the amount that adds the cement admixture in the cement composition, preferred polycarboxylic acid multipolymer of the present invention is 0.01-10 weight %, regards whole cement weight as 100 weight %.If be lower than 0.01 weight %, cause performance not enough.If it is surpass 10 weight %, then uneconomical.Described weight percentage is in solid matter.

The above-mentioned cement composition that is high workability not only can be used for ultra high strength concrete, also can be used for precast concrete, be used for the concrete of centrifugal mo(u)lding, the concrete that is used for vibrating compacting, steam cure concrete, gunning concrete etc., and can be used in plaster or the concrete kind that needs high workability, as medium mobile concrete (concrete of avalanche value in the 22-25cm scope), high-flowing concrete (the avalanche value is not less than 25cm, and the concrete of avalanche yield point value in the scope of 50-70cm), from compacted concrete and self-leveling material.

The cement dispersants that above-mentioned cement admixture can use usually in the art with those and know mixes use.Cement dispersants well known and that use is not had particular restriction, comprise having the poly carboxylic acid dispersion agent that has polyoxyalkylene chain and carboxyl in sulfonic sulfonic acid dispersion agent and the various molecule in the various molecules.

As for the sulfonic acid dispersion agent, for example can be sulfonated lignin; Polyol derivative; Naphthyl sulfonic acid-formaldehyde condensation products; Melamine sulfonic acid-formaldehyde condensation products; Poly styrene sulfonate; Sulfamic acid compound such as amino-aryl sulfonic acid-P-F condenses etc.As for the polycarboxylic acid dispersion agent, for example can be that the open communique of sulfamic acid compound such as Japan special permission puts down-the described amino-aryl sulfonic acid of 01-113419-P-F condenses; The open communique of Japan special permission puts down-the described cement dispersants of 07-267705, and described cement dispersants comprises as the salt of multipolymer of the list of component (a) (methyl) vinylformic acid polyglycol ester cpds and (methyl) acrylic compound and/or described multipolymer, as the hydrolysate of the multipolymer of polyglycol list (methyl) allyl ether compound of component (b) and maleic anhydride and/or described multipolymer and/or its salt, as multipolymer and/or its salt of the maleic acid ester of polyglycol list (methyl) allyl ether compound of component (c) and polyglycol compound; JP 2508113 described concrete additives, described concrete additive comprise as the multipolymer of (methyl) vinylformic acid polyglycol ester of component A and (methyl) vinylformic acid (or its salt), as the specific polyethylene glycol-propylene glycol compound of B component and as the specific surfactant of component C; The open communique of Japan special permission is clear-multipolymer of the described list of 62-216950 (methyl) polyalkylene glycol acrylate (propylene glycol) ester or single (allyl group) ether of polyoxyethylene glycol (propylene glycol), (methyl) allyl sulphonic acid (or its salt) and (methyl) vinylformic acid (or its salt);

The open communique of Japan special permission puts down-multipolymer of 01-226757 described (methyl) polyalkylene glycol acrylate (propylene glycol) ester, (methyl) allyl sulphonic acid (or its salt) and (methyl) vinylformic acid (or its salt); The open communique of Japan special permission puts down-multipolymer of 05-36377 described (methyl) polyalkylene glycol acrylate (propylene glycol) ester, (methyl) allyl sulphonic acid (or its salt) or right-(methyl) allyl benzene sulfonic acid (or its salt) and (methyl) vinylformic acid (or its salt); The open communique of Japan special permission puts down-multipolymer of the described polyethyleneglycol of 04-149056 (methyl) allyl ethers and toxilic acid (or its salt); The open communique of Japan special permission puts down-have the α of amino, the multipolymer of β-unsaturated monomer in 05-170501 described (methyl) polyalkylene glycol acrylate ester, (methyl) allyl sulphonic acid (or its salt), (methyl) vinylformic acid (or its salt), single (methyl) acrylic acid alkyl glycol, list (methyl) vinylformic acid polyglycol and the molecule; The multipolymer of the described polyethyleneglycol of 06-191918 (methyl) allyl ethers, list (methyl) polyalkylene glycol acrylate ester, list (methyl) alkyl acrylate, (methyl) vinylformic acid (or its salt) and (methyl) allyl sulphonic acid (or its salt) or right-(methyl) allyl benzene sulfonic acid (or its salt) is openly put down in Japan's special permission; The open communique of Japan special permission puts down-multipolymer or its hydrolysate or its salt of 05-43288 described alkoxyl group polyglycol mono allyl ether and maleic anhydride; Japan authorization communique is clear-the described polyoxyethylene glycol mono allyl ether of 58-38380, toxilic acid and can with monomeric multipolymer or its salt or its ester of these monomer copolymerizations; Japan authorization communique is clear-the described list of 59-18338 (methyl) vinylformic acid polyglycol ester monomer, (methyl) Acrylic Acid Monomer and can with the monomeric multipolymer of these monomer copolymerizations; The open communique of Japan special permission is clear-62-119147 described have sulfonic (methyl) acrylate and (if the words that need) can with the monomeric multipolymer of these monomer copolymerizations; The open communique of Japan special permission puts down-and the multipolymer and the alkene end-blocking polyoxyalkylene derivative of 06-271347 described alkoxyl group polyglycol mono allyl ether and maleic anhydride carry out the product that esterification makes; The open communique of Japan special permission is usual-and the multipolymer and the hydroxy-end capped polyoxyalkylene derivative of 06-298555 described alkoxyl group polyglycol mono allyl ether and maleic anhydride carry out the product that esterification makes; The open communique of Japan special permission is clear-62-68806 described by oxyethane is added alkene ether monomer that specific unsaturated alcohol such as 3-methyl-3-butene-1-alcohol makes, unsaturated carboxylic acid monomer and can with monomeric multipolymer or its salt of these monomer copolymerizations; Perhaps similar polycarboxylic acid (or its salt).These cement dispersants may be used singly or in combin two or more in them.Especially in the above-mentioned cement dispersants that is used in combination, should be used in combination the various polycarboxylic acid dispersion agents that have polyoxyalkylene chain and carboxyl in the molecule,, list those multipolymers in the table 1 as the exemplary of polycarboxylic acid dispersion agent.

Table 1

Monomer 1		Monomer 2	Ratio (weight %)
					Kind	The average mol that adds	Kind	Monomer	1	Monomer 2
PGM	15	SMAA	70	30
					PGM	25	SMAA	80	20
PGM	120	SMAA	90	10
					PGA	15	SA	80	20
PGA	25	SA	85	15
					PGA	120	SA	90	10
IPN	10	SMA	75	25
					IPN	50	SMA	85	15
IPN	100	SMA	92	8
					PAL	35	SMA	80	20
PML	75	SMA	90	10
					IPN	10	SA	80	20
IPN	50	SA	85	15
					IPN	100	SA	92	8
PAL	35	SA	80	20
					PAL	150	SA	85	15
PML	75	SA	85	15
					PML	120	SA	95	5

PAL: polyoxyethylene glycol mono allyl ether

PML: polyethyleneglycol methallyl ether

IPM: polyethyleneglycol (3-methyl-3-butenyl) ether

PGM: methacrylic acid methoxy base gathers the second diester

PGA: the vinylformic acid methoxyl group gathers the second diester

SMAA: sodium methacrylate

SA: sodium acrylate

SMA: sodium maleate

When being used in combination described cement dispersants, preparation weight between above-mentioned cement admixture and the above-mentioned cement dispersants should be at 5-95: between the 95-5, be more preferably 10-90: 90-10, though it can not come clearly to determine according to used cement dispersants kind and mixing formula, measuring condition and other factors.

And above-mentioned cement admixture can be used in combination with other cement admixture.As for described other cement admixture, suitable have known other cement admixture (mixture) shown below.

(1) water-soluble macromolecular substance; Unsaturated carboxylic acid polymer such as polyacrylic acid (sodium salt), polymethyl acrylic acid (sodium salt), polymaleic acid (sodium salt) and vinylformic acid-maleic acid sodium salt; Polyoxyethylene or polyoxypropylene polymer or its multipolymer are as polyoxyethylene glycol and polypropylene glycol; Nonionic cellulose ether such as methylcellulose gum, ethyl cellulose, Walocel MT 20.000PV, Natvosol, carboxymethyl cellulose, carboxyethyl cellulose and hydroxypropylcellulose; The polysaccharide that forms by microbial fermentation, as yeast glucan, xanthan gum, β-1,3-dextran (can be straight or branched, for example heat be coagulated polysaccharide, paramylum, pachyman, small nut grape lance sugar, laminaran); Polyacrylamide; Polyvinyl alcohol, starch; Starch phosphate salt; Sodiun alginate; Gel; Contain amino acrylic copolymer and deutero-quaternized products etc. thus;

(2) polymer emulsion: the multipolymer of various vinyl monomers (as (methyl) alkyl acrylate).

(3) retarding agent; Oxo carboxylic acid (or its salt) and inorganic or organic salt such as glyconic acid, glucoheptonic acid, arabonic acid, oxysuccinic acid and citric acid and its sodium salt, sylvite, calcium salt, magnesium salts, ammonium salt and triethanolamine salt; Carbohydrate such as monose, disaccharides, trisaccharide etc., oligose such as glucose, fructose, semi-lactosi, sucrose, wood sugar, apiose, ribose and isomerized sugar, oligose such as dextrin, polysaccharide such as dextran, molasses and contain these sugared similar mixtures; Sugar alcohol such as sorbyl alcohol; Magnesium silicofluoride; Phosphoric acid and its salt or boric acid ester; Aminocarboxylic acid and its salt; Caustic solubility protein; Humic acid; Weibull; Phenols; Polyvalent alcohol such as glycerine; Phosphonic acids and its derivative are as amino three (methylene phosphonic acids), 1-hydroxy ethylene-1,1-di 2 ethylhexyl phosphonic acid, ethylenediamine tetraacetic (methylene phosphonic acid), diethylenetriamine five (methylene phosphonic acid) and these sour an alkali metal salts and alkaline earth salt etc.;

(4) accelerator or fast hard agent; Soluble calcium salt such as calcium chloride, calcium nitrite, nitrocalcite, Calcium Bromide and calcium iodide; Muriate such as iron(ic) chloride and magnesium chloride; Vitriol; Potassium hydroxide; Sodium hydroxide; Carbonate; Thiosulphate; Formic acid and formate such as calcium formiate; Alkanolamine; High-alumina cement; Ca aluminosilicate etc.;

(5) mineral oil antifoam agent; Kerosene, whiteruss etc.;

(6) fat or oily defoamer; Animal/vegetables oil, sesame oil, Viscotrol C, oxyalkylene addition compound that obtains from these oil etc.;

(7) fatty acid defoamer; Oleic acid, stearic acid, oxyalkylene addition compound that obtains from these acid etc.;

(8) fatty acid ester defoamer; Single ricinolic acid glyceryl ester, alkenyl succinic derivative, mono laurate sorbitol ester, three oleic acid sorbitol esters, natural wax etc.;

(9) oxyalkylene defoamer; Polyoxyalkylene is as (gathering) oxygen ethene-(gathering) oxypropylene adducts; (gathering) oxyalkyl ether such as glycol ether heptyl ether, polyoxyethylene oil ether, polyoxy propylidene butyl ether, polyoxyethylene-polyoxypropylene 2-ethylhexyl ether and the oxygen ethene-oxypropylene adducts that contains the higher alcohols of 12-14 carbon atom; (gathering) oxyalkylene (alkyl) aryl ethers such as polyoxy propylidene phenyl ether and polyoxyethylene nonylplenyl ether; The alkynes ether that makes from the addition polymerization of acetylene alcohol by oxyalkylene, as 2,4,7,9-tetramethyl--5-decine-4,7-glycol, 2,5-dimethyl-3-hexin-2,5-two pure and mild 3-methyl isophthalic acid-butine-3-alcohol; (gathering) oxyalkylene fatty acid ester such as glycol ether oleic acid ester, diethylene glycol monolaurate and Unister E 275; (gathering) oxyalkylene Span such as polyoxyethylene sorbitan monolaurate and polyoxyethylene sorbitol trioleate; (gathering) oxyalkylene alkyl (aryl) ether sulfuric acid such as polyoxypropylene methyl ether sodium sulfate and polyoxyethylene dodecyl phenol ether sodium sulfate; (gathering) oxyalkylene alkyl phosphate is as (gathering) oxygen ethene stearyl phosphoric acid ester; (gathering) oxyalkylene alkylamine such as polyoxyethylene lauryl amine; Polyoxyalkylene acid amides etc.;

(10) pure defoamer; Octanol, cetyl alcohol, acetylene alcohol, dibasic alcohol etc.;

(11) acid amides defoamer; Acrylate polyamine etc.;

(12) phosphoric acid ester defoamer; Tributyl phosphate, sodium octyl phosphate etc.;

(13) metallic soap defoamer; Aluminum stearate, calcium oleate etc.;

(14) silicone antifoam agent; Dimethyl silicone oil, siloxanes is stuck with paste, silicone emulsion, organically-modified polysiloxane (organopolysiloxane such as dimethyl polysiloxane), fluorosilicon oil etc.;

(15) AE (aerating) agent; Sodium resinate, saturated or unsaturated fatty acids, hydroxyl sodium stearate, lauryl sulfate, ABS (alkylbenzene sulfonate), LAS (linear alkyl benzene sulfonate salt), alkane sulfonate, polyoxyethylene alkyl (phenyl) ether, polyoxyethylene alkyl (phenyl) ether sulfuric ester and its salt, polyoxyethylene alkyl (phenyl) ether phosphate and its salt, proteinaceous substances, the alkenyl sulfo-succinic acid, alpha-olefin sulphonate etc.;

(16) other tensio-active agent; Add to the monobasic fatty alcohol (as Stearyl alcohol or stearyl alcohol) that contains 6-30 carbon atom by the oxyalkylene (as oxyethane and/or propylene oxide) that will be no less than 10 moles, the monobasic alicyclic alcohol (as abietinol) that contains 6-30 carbon atom, a mercaptan (as lauryl mercaptan) that contains 6-30 carbon atom, the alkylphenol (as nonyl phenol) that contains 6-30 carbon atom, contain the amine (as n-Laurylamine) of 6-30 carbon atom or contain the polyoxyalkylene derivative that makes on the carboxylic acid (as lauric acid or stearic acid) of 6-30 carbon atom; Comprise two alkyl diphenyl ether sulfonates that contain the phenyl of sulfo group, it can contain alkyl or the alkoxy substituent that links together by ehter bond; Various aniorfic surfactant, various cationic surfactants such as alkylamine acetate and alkyl trimethyl ammonium chloride; Various nonionic surface active agent; Various amphotericses etc.;

(17) water-resisting agent; Lipid acid (salt), fatty acid ester, fatty and oily, siloxanes, paraffin, pitch, wax etc.:

(18) rust-preventive agent; Nitrite, phosphoric acid salt, zinc oxide etc.;

(19) antichecking agent; Polyoxyalkylene alkyl; Alkanediol such as 2-methyl-2,4-pentanediol etc.;

(20) expansion admixture; The ettringite material, coal etc.

As for other known cement admixture (mixture), that can address has a cement wetting agent, and thickening material prevents separating agent, flocculation agent, the reagent that shrinks when reducing drying improves strength reagent, from flow agent, rust-preventive agent, aberration agent, mycocide, blast-furnace slag, flying dust, the slag ash, frit ash, shell ash, silicon-dioxide smog, SiO 2 powder, gypsum etc.These known cement admixtures can be separately or in them two or more combine use.

In above-mentioned cement composition, the combination 1 of the following component of mentioning except cement and water)-7) can be used as particularly preferred example:

1) as the combination of (1) cement admixture of the present invention He (2) oxyalkylene type defoamer of two kinds of main ingredients.The ratio of the relative cement admixture (1) of oxyalkylene type defoamer (2) is 0.001-10 quality % preferably.

2) comprise three kinds of basal components, i.e. the combination of (1) cement admixture of the present invention, (2) polycarboxylic acid dispersion agent and (3) oxyalkylene type defoamer.Weight ratio between cement admixture (1) and the multipolymer (2) should be more preferably in the scope of 10/90-90/10 in the scope of 5/95-95/5.The ratio of relative cement admixture (1) of oxyalkylene type defoamer (3) and polycarboxylic acid dispersion agent (2) total amount is 0.001-10 quality % preferably.

3) comprise two kinds of basal components, promptly have the combination of the sulfonic acid dispersion agent of sulfonic acid group in (1) cement admixture of the present invention and (2) molecule.Useful sulfonic acid dispersion agent is lignosulfonic acid, naphthyl sulfonic acid-formaldehyde condensation products; Melamine sulfonic acid-formaldehyde condensation products; Poly styrene sulfonate; Amino-aryl sulfonic acid-P-F condenses and similar thionamic acid dispersion agent.The weight ratio that has in cement admixture (1) and the molecule between the sulfonic acid dispersion agent (2) of sulfonic acid group should be more preferably at 10/90-90/10 in the scope of 5/95-95/5.

4) comprise two kinds of basal components, i.e. the combination of (1) cement admixture of the present invention and (2) sulfonated lignin.Weight ratio between cement admixture (1) and the sulfonated lignin (2) should be more preferably in the 10/90-90/10 scope in the scope of 5/95-95/5.

5) as the combination of (1) cement admixture of the present invention He (2) anti-separating agent of two kinds of main ingredients.Useful anti-separating agent is nonionic cellulose ether and similar various thickening material.The mixed weight ratio of cement admixture (1) and anti-separating agent (2) is 10/90-99.99/0.01 preferably, is more preferably 50/50-99.9/0.1.The cement composition that contains this combination is suitable as high-flowing concrete, from fill concrete and self-leveling material.

6) as the combination of (1) cement admixture of the present invention He (2) retarding agent of two kinds of main ingredients.Useful retarding agent is hydroxycarboxylic acid (as glyconic acid (salt) and citric acid (salt)), sugar (as glucose), sugar alcohol (as Sorbitol Powder) and phosphonic acids as amino three (methylene phosphonic acids) etc.Mixed weight ratio between cement admixture (1) and the retarding agent (2) is 50/50-99.9/0.1 preferably, is more preferably 70/30-99/1.

7) as the combination of (1) cement admixture of the present invention He (2) accelerator of main ingredient.Useful accelerator is soluble calcium salt such as calcium chloride, calcium nitrite and nitrocalcite; Muriate such as iron(ic) chloride and magnesium chloride; Thiosulphate; Formic acid and formate such as calcium formiate etc.Mixed weight ratio between cement admixture (1) and the accelerator (2) is 10/90-99.9/0.1 preferably, is more preferably 20/80-99/1.

Above-mentioned cement admixture not only can be used in combination with above-mentioned cement dispersants known in the art and/or cement admixture (mixture), and can be used to improve cement composition adulterant dispersed and/or foam inhibition performance and be used in combination.

As for the method in above-mentioned cement admixture and the above-mentioned cement dispersants adding cement composition, preferably this cement admixture and cement dispersants are mixed, cement admixture is provided, be convenient to thus it is attached in the cement composition.

The cement composition that comprises above-mentioned cement admixture is excellent property aspect mobile and mobile confining force, therefore, but aspect diminishing capacity and application property also excellent property, in addition, also provide intensity and weather resistance good hardening product.Therefore, the cement admixture that comprises polycarboxylic acid multipolymer of the present invention is applicable to ultra high strength concrete, and can provide the effect that enough is used for ultra high strength concrete as water reducer.

As for prescription, used material and blending means or in above-mentioned ultra high strength concrete, can be with reference to (2001-9.) in Japanese architecture institute annual report (Northeast), the 197-200 page or leaf, the 56th annual meeting report summaries of Japan Institution of Civil Engineers, the V part, V-137 (" about the symposial of the intensity of ultrahigh-strength cement performance ") (2001), the explanation among the 274-275.It is for reference that mode has by the following examples provided some preferred embodiments of the present invention.

Table 2

Concrete formulation-1 (design air content is 2.0 volume %)

W/C (weight %)	S/a (volume %)	Unit weight (Kg/m 3)				The plaster mixing time
							W	C	S	G
		25.0	47.2	150	600						772	861	60
22.0	45.0					682	703
		20.0	42.9		750			646
18.0	40.1					833	577
		16.0	36.3		938			490	90
14.0	30.5					1071	378			120

Below, reference table 2 is discussed.

" W/C (weight %) " is the weight percentage of water for cement, and " s/a (volume %) " is the percent by volume of fine granular with respect to total (fine granular+thick).W is the unit water-content, and C is the unit cement content, and s is a unit fine granule content, and G is the thick content of unit.A is the absolute volume of total (fine granular+thick), and s is the absolute volume of fine granular.

(used material)

Cement: the silicon ash concrete (density=3.08g/cm of Ube Mitsubishi Cement preparation ³, Blaine specific surface area=5,600cm ²/ g)

Fine granular: (density=2.57g/cm3 under saturated surface-dried condition absorbs=2.15%, F.M.=2.76) to Ohigawa Lu Sha

Thick: the Oume rubble (density=2.65g/cm3 under saturated surface-dried condition, solids content=0.59, F.M.=6.74, M.S.=20mm)

(blending means)

According to following program, use 55 liters to strengthen each 30 liters of batch of material of twin shaft mixing tank mixing.

Described cement and fine granular are mixed together 10 seconds, mixing water and add wherein cement admixture then, with described mixture remix for some time, the described time is table 2 defined " plaster mixing time (second) ".Afterwards, mix thick, carry out 90 seconds mixing again, form ultra high strength concrete and mix.

Table 3

Concrete formulation-2

Low-heat portland cement and meticulous silicon come powder with 9: 1 weight ratio blended powder systems

(design air content is 2.0 volume %)

W/B (weight %)	S/a (volume %)	Unit weight (Kg/m 3)
							W	C	SF	S	G
		30.0	47.2	160	533	0						794	861
22.0	45.0						150	614	68	729
		18.0	42.9	750	83	603
15.0	40.1							900	100	463
		12.0	36.3	1125	-	-

Below, reference table 3 is discussed.

" W/C (weight %) " is the weight percentage of water for binding agent (cement and silicon ash), and " s/a (volume %) " is the percent by volume of fine granular with respect to total (fine granular and thick granule).W is the unit water-content, and B is the unit binder content, i.e. the mixing total amount (B=C+SF) at cement and meticulous wollastonite powder end, and C is the unit cement content, and SF is a unit meticulous wollastonite powder end content, and S is a unit fine granule content, and G is the thick content of unit.A is the absolute volume of total (fine granular and thick granule), and s is the absolute volume of fine granular.

(used material)

Cement: low-heat portland cement (density=3.22g/cm ³, Blaine specific surface area=3,280cm ²/ g)

Fine granular: the Ohigawa Lu Sha (density=2.57g/cm under saturated surface-dried condition ³, absorb=2.15%, F.M.=2.76)

Thick: the Oume rubble (density=2.65g/cm under saturated surface-dried condition ³, solids content=0.59, F.M.=6.74, M.S.=20mm)

(blending means)

According to following program, use 55 liters to strengthen each 30 liters of batch of material of twin shaft mixing tank mixing.

Described cement, meticulous wollastonite powder end and fine granular are mixed together 60 seconds, and mixing water and adding cement admixture wherein after definite plaster mixes, were mixing 30 seconds then.Afterwards, mix thick, carry out 90 seconds mixing again, form ultra high strength concrete and mix.

Brief Description Of Drawings

Fig. 1 is with reference to the GPC crest, is used to illustrate the example that does not have the crest of replat situation and have the crest situation of replat.

Fig. 2 is the synoptic diagram that is used for the scraper (being made by stainless steel) of definite cement coefficient of refrigeration and calcium branch value.

Fig. 3 is the synoptic diagram that is used for the Newdes cup (300mL) (Teraola Co. product) of definite cement coefficient of refrigeration and calcium branch value.

Fig. 4 is the synoptic diagram of water screw (four leaves) that is used for determining the intimate mixing device of calcium branch value.

Fig. 5 is when using ordinary Portland cement to settle the standard add-on according to cement coefficient of refrigeration measuring method in an embodiment, with respect to the diagram that concerns between described reagent (multipolymer) add-on of cement and the flow valuve.

Fig. 6 is when settling the standard the calcium add-on according to calcium branch value measuring method in an embodiment, with respect to the diagram that concerns between described reagent (multipolymer) add-on of used cement and the gained flow valuve.

Fig. 7 has shown the gpc measurement result (the not GPC of purified product figure and crest data) of not purifying polycarboxylic acids multipolymer prepared among the embodiment 8.

Fig. 8 has shown the gpc measurement result (the GPC figure and the crest data of purified product) of the polycarboxylic acid multipolymer of prepared and subsequent purificn among the embodiment 8.

Fig. 9 has shown the H-NMR measuring result (the not H-NMR of purified product figure) of not purifying polycarboxylic acids multipolymer prepared among the embodiment 8.

Figure 10 has shown the H-NMR measuring result (the H-NMR figure of purified product) of the polycarboxylic acid multipolymer of prepared and subsequent purificn among the embodiment 8.

Figure 11 has shown the C-NMR measuring result (the not C-NMR of purified product figure) of not purifying polycarboxylic acids multipolymer prepared among the embodiment 8.

Figure 12 has shown the C-NMR measuring result (the C-NMR figure of purified product) of the polycarboxylic acid multipolymer of prepared and subsequent purificn among the embodiment 8.

Figure 13 has shown the IR measuring result (the not IR of purified product figure) of not purifying polycarboxylic acids multipolymer prepared among the embodiment 8.

Figure 14 has shown the IR measuring result (the IR figure of purified product) of the polycarboxylic acid multipolymer of prepared and subsequent purificn among the embodiment 8.

Figure 15 is the titration curve that obtains in the prepared polycarboxylic acid multipolymer potentiometric titration of embodiment 8, and described potentiometric titration is carried out (the not potentiometric titration curve of purified product) by the TCAV measuring method.

Figure 16 is when carrying out proton N MR by the NMR-PEG content measuring method when measuring, the H-NMR figure of the polycarboxylic acid multipolymer of the prepared and subsequent purificn of embodiment 8.

Figure 17 is the enlarged view of Figure 12 in the 60-80ppm part.

The best mode that carries out an invention

Following examples have been described the present invention in more detail.But these embodiment never limit the scope of the invention.If do not stipulate in addition that " % " is meant " weight % ".

Embodiment 1

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger is housed, the 500 parts of polymine-ethylene oxide adducts (is the compound that obtains on the active hydrogen atom of 600 polymine by 3 moles of (on average) oxyethane being added to Mw) of packing into, use nitrogen purging conversion unit inside while stirring, and material is cooled to 20 ℃ or following in nitrogen atmosphere.When described reactive system remains on 20 ℃ or when following, in 1 hour, add 44.3 parts of glycidyl methacrylate.After finishing adding, stirred 1 hour, make polymine-ethylene oxide adduct monomer (polymine-EO adducts macromonomer) 20 ℃ or following continuation.

Embodiment 2

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger is housed, the 500 parts of polymine-ethylene oxide adducts (is the compound that obtains on the active hydrogen atom of 600 polymine by 3 moles of (on average) oxyethane being added to Mw) of packing into, use nitrogen purging conversion unit inside while stirring, and material is cooled to 20 ℃ or following in nitrogen atmosphere.When described reactive system remains on 20 ℃ or when following, in 1 hour, add 51.2 parts of methacrylic anhydrides.After finishing adding, stirred 1 hour, make polymine-ethylene oxide adduct monomer (polymine-EO adducts macromonomer) 20 ℃ or following continuation.

Embodiment 3

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 984.3 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic polymine-EO adducts macromonomer in the 166.0 parts of methacrylic acids, 208.5 parts of embodiment 1,250.0 parts of water and 15.7 parts make the aqueous solution (503.5 gram) of mix monomer as the monomer solution of the 3-thiohydracrylic acid of chain-transfer agent and 200.0 part of 10.4% ammonium persulfate aqueous solution in 2 hours, drip and comprise 625.5 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane:.Finish after the dropping, again 0.0 part of 10.4% ammonium persulfate aqueous solution of Dropwise 5 in 0.5 hour.Then, kept 2 hours down at 80 ℃ again, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 17,400 polycarboxylic acid multipolymer.

Embodiment 4

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 117.2 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic polymine-EO adducts macromonomer in the 25.2 parts of methacrylic acids, 25.3 parts of embodiment 1,30.0 parts of water and 2.8 parts make the aqueous solution of mix monomer as the monomer solution of the 3-thiohydracrylic acid of chain-transfer agent and 24.0 part of 10.4% ammonium persulfate aqueous solution in 2 hours, drip and comprise 69.5 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane:.Finish after the dropping, in 0.5 hour, drip 6.0 part of 10.4% ammonium persulfate aqueous solution again.Then, kept 2 hours down at 80 ℃ again, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 14,000 polycarboxylic acid multipolymer.

Embodiment 5

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 1458.2 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.23), 149.5 parts of vinylformic acid, 203.0 parts of water and 20.2 parts of aqueous solution in 2 hours, drip and comprise 581.7 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent, comprise the monomer solution of synthetic polymine-EO adducts macromonomer and 198.8 parts of water among 198.8 parts of embodiment 1 and the aqueous solution that 248.0 part of 15% sodium persulfate aqueous solution made mix monomer.Finish after the dropping, in 0.5 hour, drip 62.0 part of 15% sodium persulfate aqueous solution again.Then, under 80 ℃, kept again 2 hours, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 11,300 polycarboxylic acid multipolymer.

Embodiment 6

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 1455.3 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.23), 189.2 parts of vinylformic acid, 202.9 parts of water and 20.8 parts of monomer solutions as the 3-thiohydracrylic acid of chain-transfer agent, the aqueous solution that comprises synthetic polymine-EO adducts macromonomer and 201.9 parts of water among 201.9 parts of embodiment 1 and 248 part of 15% sodium persulfate aqueous solution make the aqueous solution of mix monomer in 2 hours, drip and comprise 539 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane:.Finish after the dropping, in 0.5 hour, drip 62 part of 15% sodium persulfate aqueous solution again.Then, under 80 ℃, kept again 2 hours, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 11,000 polycarboxylic acid multipolymer.

Embodiment 7

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 117.2 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic polymine-EO adducts macromonomer in the 25.2 parts of methacrylic acids, 25.3 parts of embodiment 2,30 parts of water and 2.8 parts make the aqueous solution of mix monomer as the monomer solution of the 3-thiohydracrylic acid of chain-transfer agent and 24.0 part of 10.4% ammonium persulfate aqueous solution in 2 hours, drip and comprise 69.5 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane:.Finish after the dropping, in 0.5 hour, drip 6.0 part of 10.4% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 2 hours, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 12,000 polycarboxylic acid multipolymer.

Embodiment 8

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 984.3g water of packing into was used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic polymine-EO adducts macromonomer, 250g water and 18g make mix monomer as the monomer solution and the 200g10.4% ammonium persulfate aqueous solution of the 3-thiohydracrylic acid of chain-transfer agent in the 187.6g methacrylic acid, 208.5g embodiment 1 the aqueous solution in 2 hours, drip and comprise 603.9g monomethyl vinylformic acid methoxy poly (ethylene glycol) ester (the average addition mole number of oxyethane:.Finish after the dropping, again Dropwise 5 0g10.4% ammonium persulfate aqueous solution in 30 minutes.Then, kept 2 hours down at 80 ℃ again, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 12,300 polycarboxylic acid multipolymer.

Embodiment 9

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 187.3g deionized water of packing into was heated to 65 ℃ with reactive system in nitrogen atmosphere, add the aqueous hydrogen peroxide solution of 3.1g30% then.In 3 hours toward the mixing solutions that wherein drips the IPN-25 aqueous solution, 1.2gL-xitix and the 2.0g1-spicy thioalcohol comprise 532.0g 80% with comprise 71.6g vinylformic acid and the mixing solutions of 36.8g deionized water.Finish after the dropping, again in 1.5 hours at 65 ℃ of described mixtures of following slaking, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is adjusted to pH7, obtains weight-average molecular weight and be the aqueous solution of 36,300 polycarboxylic acid multipolymer.

Comparative Examples 1

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 99.7g water of packing into was used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), the monomer solution of 21g methacrylic acid, 24.7g water and 0.66g3-thiohydracrylic acid and comprise the 1.2g ammonium persulphate and the initiator solution of 23.8g water in 4 hours and 5 hours, drip in the reaction vessel respectively and comprise 79g monomethyl vinylformic acid methoxy poly (ethylene glycol) ester (the average addition mole number of oxyethane:.Finish after the dropping of initiator solution, under 80 ℃, kept again 1 hour, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is neutralized to pH7.0, the acquisition weight-average molecular weight is 24,000 polycarboxylic acid multipolymer.

The plaster preparation method

In plaster mixer (trade mark: N-50, the product of Tesco) with the slow speed of revolution do to mix the Taiheiyo ordinary Portland cement (trade mark: the product of Taiheiyo Cement, 800g) and 400gToyoura quartz sand 30 seconds.Then, add the water that 180g contains the multipolymer for preparing in the polycarboxylic acid multipolymer for preparing among the embodiment or the Comparative Examples described herein in the dark compound, and mix by high rotating speed and to prepare described plaster in 5 minutes toward cement and husky doing.So that its solid matter weight percentage adds the polycarboxylic acid multipolymer of each embodiment or the multipolymer of Comparative Examples with respect to the amount that cement weight accounts for table 4 indicating value.Mixing condition in the dry blend plaster mixer is identical with each stucco blend of preparation.

Evaluation method

(1) the plaster homogenizing time

In 5 minutes high rotating speed mixing processes after adding 180g contains the water of polycarboxylic acid multipolymer or multipolymer described herein in the dark compound of doing of cement and sand, plaster becomes the required time of homogeneous (second) can be determined by visual inspection, and is recorded as the plaster homogenizing time.It is described that the results are shown in Table 4.

(2) flow valuve

Add after the entry 6 minutes, toward placing hollow cylinder container on the stainless steel plate (diameter is 55mm, highly is 50mm) the prepared plaster of impouring.Then, this hollow cylinder container of vertical-lift, the diameter along orthogonal two directional survey plaster are sprawled on stainless steel plate writes down its mean value, as flow valuve (mm).Higher flow valuve shows mobile high.The results are shown in Table 4.

(3) run through the time

In the cement paste agent container with definition among the prepared plaster impouring JIS R 5201, after leaving standstill 15 minutes or 75 minutes, the tip of the Vicat probe device of the master bar that definition is housed among the JIS R 5201 contact with plaster in the cement paste agent container, make it the whereabouts then.Master bar reaches the required time record in cement paste agent container bottom for running through the time (second).Running through the time longly more shows that the viscosity of cement is high more.The results are shown in Table 4.

Table 4

	The polycarboxylic acid multipolymer			Multipolymer
					Embodiment 3	Embodiment 7	Embodiment 8	Comparative Examples 1
	Add-on (weight %/cement)	0.53	0.53	0.49					0.32
Flow valuve (millimeter)					190	186	196	192
	Plaster runs through the time (second) after 15 minutes	0.9	0.91	0.44					0.95
Plaster runs through the time (second) after 75 minutes					1.26	1.3	0.59	1.65

When the plaster after between the polycarboxylic acid multipolymer of multipolymer that compares Comparative Examples 1 and embodiment 15 minutes and 75 minutes runs through the time, with regard to Comparative Examples 1 multipolymer, its time of running through after 75 minutes is 1.65 seconds, and with regard to the polycarboxylic acid multipolymer of embodiment, it is very short that it runs through the time, it is 0.59-1.30 second, show and use the plaster comparison of the copolymer of Comparative Examples 1, the viscosity of described plaster is lower, the multipolymer of described Comparative Examples 1 does not contain polymine-EO adducts macromonomer, and the polycarboxylic acid multipolymer of described embodiment comprises polymine-EO adducts macromole.Therefore, can find, comprise the polymine-polycarboxylic acid multipolymer of EO adducts macromonomer and can effectively reduce the viscosity of plaster.

Embodiment 10

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen/air admission pipe and reflux exchanger are housed, pack into 300 parts of Sorbitol Powder-ethylene oxide adducts (by add 10 moles of compounds that (on average) oxyethane makes toward the Sorbitol Powder hydroxyl) and 0.08 part of sodium hydroxide, and in air atmosphere, temperature is risen to 90 ℃.When reactive system is remained on 90 ℃, in 1 hour, add 22.9 parts of glycidyl methacrylate.Finish after the adding, continue down to stir 2 hours, make Sorbitol Powder-ethylene oxide adduct monomer (Sorbitol Powder-EO adducts macromonomer) at 90 ℃.

Embodiment 11

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 82.5 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic Sorbitol Powder-EO adducts macromonomer, 64.6 parts of water and 2.88 parts of monomer solution and 22.5 part of 4.6% ammonium persulfate aqueous solution in the 22.5 parts of methacrylic acids, 25.2 parts of embodiment 10 in 3 hours, drip and comprise 72.3 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent.Finish after the dropping, in 1 hour, drip 7.5 part of 4.6% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 1 hour, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 16,300 polycarboxylic acid multipolymer.

Embodiment 12

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen/air admission pipe and reflux exchanger are housed, pack into 400 part of three second tetramine-ethylene oxide adduct (by toward three second tetramines-the NH group adds 10 moles of compounds that (on average) oxyethane makes), and in air atmosphere, temperature is risen to 90 ℃.When reaction system is remained on 90 ℃, in 1 hour, add 30.6 parts of glycidyl methacrylate.Finish after the adding, continue down to stir 2 hours, make three second tetramine-ethylene oxide adduct monomer (three second tetramine-EO adducts macromonomer) at 90 ℃.

Embodiment 13

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 83.6 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic three second tetramine-EO adducts macromonomer, 64.6 parts of water and 1.78 parts of monomer solution and 22.5 part of 4.6% ammonium persulfate aqueous solution in the 22.5 parts of methacrylic acids, 25.2 parts of embodiment 12 in 3 hours, drip and comprise 72.3 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent.Finish after the dropping, in 1 hour, drip 7.5 part of 4.6% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 1 hour, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 17,000 polycarboxylic acid multipolymer.

Embodiment 14

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen/air admission pipe and reflux exchanger are housed, pack into 300 parts of polyglycerols (n=10)-ethylene oxide adduct (by adding 4 moles of compounds that (on average) oxyethane makes) and 0.08 part of sodium hydroxide toward the hydroxyl of polyglycerol, and in air atmosphere, temperature is risen to 90 ℃.When reaction system is remained on 90 ℃, in 1 hour, add 30.2 parts of glycidyl methacrylate.Finish after the adding, continue down to stir 2 hours, make polyglycerol-ethylene oxide adduct monomer (polyglycerol-EO adducts macromonomer) at 90 ℃.

Embodiment 15

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 82.5 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic polyglycerol-EO adducts macromonomer, 64.6 parts of water and 2.88 parts of monomer solution and 22.5 part of 4.6% ammonium persulfate aqueous solution in the 22.5 parts of methacrylic acids, 25.2 parts of embodiment 14 in 3 hours, drip and comprise 72.3 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent.Finish after the dropping, in 1 hour, drip 7.5 part of 4.6% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 1 hour, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 18,900 polycarboxylic acid multipolymer.

Embodiment 16

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 83.6 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.25), synthetic three second tetramine-EO adducts macromonomer, 64.6 parts of water and 1.78 parts of monomer solution and 22.5 part of 4.6% ammonium persulfate aqueous solution in the 22.5 parts of methacrylic acids, 25.2 parts of embodiment 12 in 3 hours, drip and comprise 72.3 parts of monomethyl vinylformic acid methoxy poly (ethylene glycol) esters (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent.Finish after the dropping, in 1 hour, drip 7.5 part of 4.6% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 1 hour, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 47,000 polycarboxylic acid multipolymer.

Embodiment 17

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen/air admission pipe and reflux exchanger are housed, pack into 400 part of three second tetramine-ethylene oxide adduct (by toward three second tetramines-the NH group adds 10 moles of compounds that (on average) oxyethane makes), and in air atmosphere, temperature is risen to 90 ℃.When reaction system is remained on 90 ℃, in 1 hour, add 24.6 parts of glycidyl allyl ethers.Finish after the adding, continue down to stir 2 hours, make three second tetramine-ethylene oxide adduct monomer (three second tetramine-EO adducts macromonomer (2)) at 90 ℃.

Embodiment 18

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 83.6 parts of water of packing into were used nitrogen purging conversion unit inside while stir, and material is heated to 80 ℃ in nitrogen atmosphere.50), synthetic three second tetramine-EO adducts macromonomer (2), 64.6 parts of water and 1.78 parts of monomer solution and 22.5 part of 4.6% ammonium persulfate aqueous solution in the 22.5 parts of methacrylic acids, 25.2 parts of embodiment 17 in 3 hours, drip and comprise 72.3 parts of polyethyleneglycols (3-methyl-3-butenyl) ether (average addition mole number of oxyethane: as the 3-thiohydracrylic acid of chain-transfer agent.Finish after the dropping, in 1 hour, drip 7.5 part of 4.6% ammonium persulfate aqueous solution again.Then, under 80 ℃, kept again 1 hour, polyreaction is finished, obtain weight-average molecular weight thus and be the aqueous solution of 19,000 polycarboxylic acid multipolymer.

Use the copolymer plaster of embodiment 16 and 18, obtain fluid plaster thus.Plaster preparation condition: at plaster mixer (trade mark: do mixed 800gTaiheiyo ordinary Portland cement (trade mark with the slow speed of revolution the product of N-50 Tesco), the product of Taiheiyo Cement) and husky 30 seconds of 400g Toyoura standard, then, in the dark compound of doing of cement and sand, add the water that 180g contains the multipolymer of preparation among 1.6g (solid matter meter) embodiment 26 or 28, and prepared described plaster in 5 minutes by high rotating speed mixing.The cement coefficient of refrigeration is measured

By above-mentioned＜cement coefficient of refrigeration measuring method 〉, the add-on that settles the standard, viscosity, mu and cement coefficient of refrigeration.

Be displayed in Table 5 reagent (multipolymer) with respect to the add-on of cement and the flow valuve of those grades used or that when settling the standard add-on, find, and shown the relation between them among Fig. 5.Standard add-on, flow valuve, the viscosity after 2 minutes and cement coefficient of refrigeration have been displayed in Table 6.

Table 5

Reagent	Add-on (weight %/cement)	Flow valuve (millimeter)
			The multipolymer of embodiment 3	0.350	167.0
0.380	193.0
		0.400		211.0
The multipolymer of embodiment 4	0.270				169.0
		0.280	208.0
	0.290			247.0
		The multipolymer of embodiment 8	0.310		157.0
0.315	188.5
			0.320	209.0
The multipolymer of embodiment 9	0.260				163.5
		0.270	194.0
	0.280			224.5
		The multipolymer of embodiment 11	0.250		104.0
0.300	188.5
			0.315	212.5
The multipolymer of embodiment 13	0.230				188.0
		0.240	200.0
	The multipolymer of embodiment 15			0.250	186.0
0.260		199.0
			0.270	212.0
The multipolymer of Comparative Examples 1		0.210			186.0
	0.220		221.5

In table 5, the add-on of reagent is the add-on of solid matter matrix with respect to cement in all cases.

Table 6

	Standard add-on (weight %/cement)	Flow valuve (millimeter)	Viscosity, mu after 2 minutes (d) (mPas)	Cement coefficient of refrigeration (μ (d)/μ (e))
					The multipolymer of embodiment 3	0.387	200	5190	0.915
The multipolymer of embodiment 4	0.278	200	4700	0.829
					The multipolymer of embodiment 8	0.318	200	4950	0.873
The multipolymer of embodiment 9	0.272	200	1840	0.325
					The multipolymer of embodiment 11	0.307	200	4690	0.827
The multipolymer of embodiment 13	0.240	200	4520	0.797
					The multipolymer of embodiment 15	0.262	200	1530	0.270
The multipolymer of Comparative Examples 1	0.214	200	14200	2.504

Mix the 2 minutes viscosity of mixture E afterwards fully:

5680mPa·s

5660mPa·s

μ(e)＝5670mPa·s

In table 6, the viscosity, mu (e) of finishing mixture E when mixing 2 minutes afterwards is 5,670mPas.

When the cement coefficient of refrigeration between the multipolymer of the multipolymer that compares Comparative Examples 1 and embodiment 3,4,8,11,13 or 15, the coefficient of the multipolymer of Comparative Examples 1 is 2.0 or higher, and the coefficient of the multipolymer of embodiment 3,4,8,11,13 or 15 is very low, promptly 1.0 or below, the multipolymer of described Comparative Examples 1 does not contain EO adducts macromonomer, and the multipolymer of embodiment 3,4,8,11,13 or 15 contains EO adducts macromonomer separately.As for the multipolymer of embodiment 9, its cement coefficient of refrigeration is also very low, promptly 0.3 or below.

Below shown explanation to the Toyoura quartz sand.

The Toyoura quartz sand

Standard sieve, is held back material and is no more than 1% by 300 microns

Standard sieve, is held back material and is no less than 95% by 106 microns

Volume density (kg/L) is not less than 1.50

Shown respectively that in table 7 and 8 size-grade distribution (is trapped in the material on the standard sieve: %) and chemical constitution.

Table 7

Project	Size-grade distribution (being retained in the material on the standard sieve) %				Volume density (Kg/L)
						300μm	212μm	150μm	106μm
	Embodiment	0.1	50.0	95.7						99.5	1.52

Table 8

Chemical constitution

Lg. loss	SiO 2	Al 2O 3	Fe 2O 3	CaO	MgO
						0.5	92.6	3.7	0.7	0.5	0.2

Proportion=about 2.64

The calcium branch value

By above-mentioned＜calcium branch value measuring method〉add-on that settles the standard and calcium branch value.Be displayed in Table 9 reagent (multipolymer) with respect to the add-on of cement and the flow valuve that when settling the standard add-on, obtains, and shown the relation between them among Fig. 6.Table 10 has shown standard add-on and calcium branch value.

Table 9

Reagent	Add-on (weight %/cement)	Flow valuve (millimeter)
			The multipolymer of embodiment 8	0.16	97
0.17	122
		0.18		144
0.19	163
		The multipolymer of Comparative Examples 1		0.14	127
0.15	165
			0.16	182
0.17	210

In table 9, the add-on of reagent (cement admixture) is all add-ons with respect to the solid matter matrix of cement.

Table 10

	Standard calcium add-on (weight %/cement)	Calcium branch value (mPas)
			The multipolymer of embodiment 1	0.188	625
The multipolymer of Comparative Examples 1	0.150	1780

The result

When the calcium branch value between the multipolymer of multipolymer that compares Comparative Examples 1 and embodiment 8, the calcium branch value of the multipolymer of Comparative Examples 1 is 1,780mPas, and the calcium branch value of the multipolymer of embodiment 8 is very low, be 625mPas, the described relatively multipolymer of Comparative Examples 1 does not contain polymine-EO adducts macromonomer, and the multipolymer of embodiment 8 comprises polymine-EO adducts macromonomer.

Compare " plaster runs through the time after 75 minutes ", " cement coefficient of refrigeration " and " calcium branch value ", described " plaster runs through the time after 75 minutes " indicated the viscosity of plaster, and described " cement coefficient of refrigeration " and " calcium branch value " have been indicated the processing property of cement admixture.

Table 11

	Plaster penetration time (second) after 75 minutes	Cement coefficient of refrigeration (μ (d)/μ (e))	Calcium branch value (mPas)
				The multipolymer of embodiment 8	0.59	0.873	625
The multipolymer of embodiment 9	-	0.325	-
				The multipolymer of Comparative Examples 1	1.65	2.504	1780

When cement coefficient of refrigeration between the multipolymer of multipolymer that compares Comparative Examples 1 and embodiment 8 and calcium branch value, the cement coefficient of refrigeration of the multipolymer of Comparative Examples 1 and calcium branch value are respectively 2.0 or higher and 1,780mPas, and the cement coefficient of refrigeration of the multipolymer of embodiment 8 and calcium branch value are respectively 1.0 or following and 625mPas, the described relatively multipolymer of Comparative Examples 1 does not contain EO adducts macromonomer, and the multipolymer of embodiment 8 comprises EO adducts macromonomer.When cement coefficient of refrigeration and calcium branch value were low, it is shorter that the plaster after 75 minutes runs through the time, and what can obtain to be easier to carry makes things convenient for the blended concrete, and the plaster after described 75 minutes runs through the time has indicated and make things convenient for the concrete carrying easiness of blended.The cement coefficient of refrigeration of the multipolymer of embodiment 9 is very low, promptly 0.4 or below, and described multipolymer makes and makes things convenient for the blended concrete to carry easily.

The analysis of embodiment 8 polymkeric substance

Unless otherwise indicated, use measuring condition as herein described.

In Fig. 7, shown the GPC figure that purified polymer not has the crest data, shown among Fig. 8 that purified polymer (purified product) has the GPC figure of crest data.Fig. 9 has shown the not H-NMR figure of purified polymer, and Figure 10 has shown the H-NMR figure of purified product.Figure 11 has shown the not C-NMR figure of purified polymer, and Figure 12 has shown the C-NMR figure of purified product.Figure 13 has shown the not IR figure of purified polymer, and Figure 14 has shown the IR figure of purified product.Figure 15 has shown used potentiometric titration curve in the TCAV of definite not purified polymer.Figure 16 has shown H-NMR figure used in the NMR-PEG content of determining purified product.Figure 17 has shown the enlarged view of the 60-80ppm part of Figure 12.

＜purification condition 〉

Use polymer purification condition 2 as herein described.

＜ultimate analysis 〉

Purifying: H not, 8.5 weight %, C, 50.8 weight %, N, 1.1 weight %

Purified product: H, 8.6 weight %, C, 52.3 weight %, N, 1.2 weight %

Measurement belongs to the nitrogen of polymine-EO adducts macromonomer.

＜pyrolysis GC-MASS 〉

Purified product: measure methacrylic acid, methacrylic acid hydroxyl ethyl ester, methacrylic acid ethoxy ethyl ester, polyoxyethylene glycol (n=2-4), 1,4-diox, 9-hat-3 ethers, 12-crown-4-ether, morpholine, 4-(hydroxyethyl) morpholine, 4-(2-amino-ethyl) morpholine etc.

To measure morpholine and its derivative in the purified product, can confirm to exist to join the functional group that poly (alkylenimines) forms by oxyethane.Therefore, can confirm the copolyreaction of polymine-EO adducts macromonomer.To measure methacrylic acid ethoxy ethyl ester and polyoxyethylene glycol (n=2-4), the copolyreaction of confirmation form methacrylic acid polyethylene glycol.

<GPC>

Purifying: Mw12 not, 300, Mn7,900, Mp9,300

Purified product: Mw15,600, Mn8,900, Mp13,900

For purified product, can determine that the crest of residual monomer diminishes.

<H-NMR>

From Fig. 9 and Figure 10, can determine to belong to polymine-EO adducts macromonomer-the N-CH-crest.

<C-NMR>

From Figure 11 and Figure 12, can determine to belong to the crest of carbon atom adjacent in polymine-EO adducts macromonomer with nitrogen-atoms.Do not find any crest that belongs to acid amides C=O group.60.4 and the 68.4ppm place define crest.

<IR>

Be displayed in Table 12 the result that IR analyzes.Do not find any stretching vibration that belongs to acid amides C=O.

Table 12

Absorption region		The vibration of key
			Purifying not	Purified product
3371cm -1	3366cm -1				OH and NH stretching vibration
		2870cm -1	2869cm -1	The CH stretching vibration
1719cm -1	1718cm -1				C=O stretching vibration (ester)
		1568cm -1	1579cm -1	C=O stretching vibration (carboxylate salt)
1454cm -1	1451cm -1				The CH flexural vibration
		1351cm -1	-	The CH flexural vibration
1107cm -1	1110cm -1				C-O-C stretching vibration (ester)
		1040cm -1	About 1040cm -1	The NH flexural vibration

<TCAV>

Copolymer solids content: 38.5 weight %, sample size: 1.1256g

From first flex point to the required amount of sodium hydroxide of second flex point: the initial pH2.60 of 13.161mL, the pH at the first flex point place is 3.50, the pH at the second flex point place is 9.94

fn：1.003，TCAV：65.8mg KOH/g

＜NMR-PEG content 〉

The weight of the purified product of sampling: 0.0441g

The weight of sampling De trioxane: 0.0455g

Integrated value ratio in NMR is at 3.3-4.2ppm Chu trioxane/crest: 0.8781

Heavy water: 1.2413g

Working curve material: use polymer A as herein described

In the polymer A-OCH ₂CH ₂-weight ratio: 55.180 weight %

The working curve of setting up: [Y]=0.851[X]-0.0031

[X]: the integrated value ratio among the NMR

The weight ratio of [Y]: trioxane/polymer A

(NMR-PEG content)=0.0455 * 0.5518/0.0441/ (0.851 * 0.8781-0.0031) * 100=76.5 weight %

The copolymer A, B, C and the D that are mixed with the multipolymer of embodiment 8 below the use carry out the plaster test.

Copolymer A: PGM25/ sodium methacrylate=80/20 weight %, weight-average molecular weight 20,000

Multipolymer B:PGM100/ sodium methacrylate=90/10 weight %, weight-average molecular weight 50,000

Multipolymer C:IPN50/ sodium maleate=85/15 weight %, weight-average molecular weight 30,000

Multipolymer D:IPN25/ sodium acrylate=90/10 weight %, weight-average molecular weight 25,000

PGM25: the monomethyl vinylformic acid methoxy poly (ethylene glycol) average mol 25 of oxyethane (add)

PGM100: the monomethyl vinylformic acid methoxy poly (ethylene glycol) average mol 100 of oxyethane (add)

IPN50: polyethyleneglycol (3-methyl-3-butenyl) the ether average mol 50 of oxyethane (add)

IPN25: polyethyleneglycol (3-methyl-3-butenyl) the ether average mol 25 of oxyethane (add)

The plaster test

The product of Taiheiyo Cement) and 400gToyoura quartz sand 30 seconds at plaster mixer (trade mark: the product of N-50 Tesco) do to mix 800g Taiheiyo ordinary Portland cement (trade mark: with the slow speed of revolution.Then, add the above-mentioned multipolymer that 240g contains ratio shown in the water of embodiment 8 multipolymers and the table 13 in the dark compound, and knead by high rotating speed and to prepare described plaster in 5 minutes toward cement and husky doing.

Toward placing hollow cylinder container on the stainless steel plate (diameter is 55mm, highly is 50mm) the prepared plaster of impouring.Then, this hollow cylinder container of vertical-lift, the diameter along orthogonal two directional survey plaster are sprawled on stainless steel plate writes down its mean value, as flow valuve (mm).Higher flow valuve shows mobile high.The results are shown in Table 13.

Table 13

		Multipolymer blending ratio (weight %)	The total amount of used multipolymer (weight %/cement)	Flow valuve (mm)
					The multipolymer of embodiment 8	Copolymer A	50/50	1.5	102
Multipolymer B	50/50	1.5	98
				Multipolymer C		50/50	1.5	95
Multipolymer D	50/50	1.5	102

In table 13, used total amount be in each multipolymer solid matter with respect to the summation of cement.

Even can determine and other polycarboxylic acid copolymer in combination use, also can obtain satisfied flow valuve.

Embodiment 19

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 185.8g deionized water of packing into was heated to 65 ℃ with reactive system in nitrogen atmosphere, add the aqueous hydrogen peroxide solution of 3.1g 30% then.In 3 hours toward wherein drip comprise 530.0g 80% pass through 25 moles of ethylene oxide are added the mixing solutions of the 3-polyethyleneglycol that methyl-3-butene-1-alcohol makes (3-methyl-3-butenyl) ether (this paper is called " the IPN-25 ") aqueous solution, 1.2g L-xitix and 3.9g1-spicy thioalcohol and comprise 71.3g vinylformic acid and the mixing solutions of 38.7g deionized water.Finish after the dropping, again in 1.5 hours at 65 ℃ of described mixtures of following slaking, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is adjusted to pH7, obtains weight-average molecular weight and be the aqueous solution of 21,900 polycarboxylic acid multipolymer.

Embodiment 20

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger is housed, pack into the aqueous solution and the 218.2g deionized water of IPN25 of 271.4g 80%, in nitrogen atmosphere, reaction system is heated to 65 ℃, adds the aqueous hydrogen peroxide solution of 2.6g 30% then.The past mixing solutions that wherein drips the mixing solutions of the IPN-25 aqueous solution, 1.0gL-xitix and the 2.6g1-spicy thioalcohol that comprise 271.4g 80% and comprise 56.9g vinylformic acid 2-hydroxy methacrylate, 19.8g vinylformic acid and 13.3g deionized water in 3 hours.Finish after the dropping, again in 1.5 hours at 65 ℃ of described mixtures of following slaking, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is adjusted to pH7, obtains weight-average molecular weight and be the aqueous solution of 23,600 polycarboxylic acid multipolymer.

Comparative Examples 2

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger was housed, the 185.5g deionized water of packing into was heated to 65 ℃ with reaction system in nitrogen atmosphere, add the aqueous hydrogen peroxide solution of 3.1g 30% then.In 3 hours toward the mixing solutions that wherein drips the IPN-25 aqueous solution, 1.2gL-xitix and the 4.0g 3-thiohydracrylic acid comprise 529.9g 80% with comprise 71.3g vinylformic acid and the mixing solutions of 38.7g deionized water.Finish after the dropping, again in 1.5 hours at 65 ℃ of described mixtures of following slaking, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is adjusted to pH7, obtains weight-average molecular weight and be the aqueous solution of 21,500 polycarboxylic acid multipolymer.

Comparative Examples 3

In the glass reaction equipment that thermometer, agitator, dropper, nitrogen enter pipe and reflux exchanger is housed, pack into the aqueous solution and the 218.1g deionized water of IPN25 of 271.8g 80%, in nitrogen atmosphere, reaction system is heated to 65 ℃, adds the aqueous hydrogen peroxide solution of 2.6g 30% then.The past mixing solutions that wherein drips the mixing solutions of the IPN-25 aqueous solution, 1.0g L-xitix and the 1.9g 3-thiohydracrylic acid that comprise 271.8g 80% and comprise 57.0g vinylformic acid 2-hydroxy methacrylate, 19.8g vinylformic acid and 13.2g deionized water in 3 hours.Finish after the dropping, again in 1.5 hours at 65 ℃ of described mixtures of following slaking, polyreaction is finished.With 30% aqueous sodium hydroxide solution reaction mixture is adjusted to pH7, obtains weight-average molecular weight and be the aqueous solution of 23,600 polycarboxylic acid multipolymer.

Evaluation method

(1) plaster preparation method

The product of Taiheiyo Cement) and 1 do to mix 1 at plaster mixer (trade mark: N-50, the product of Tesco) with the slow speed of revolution, (trade mark:, 350g is used for the standard sand 10 seconds of strength of cement test (JIS R 5201) to 080g Taiheiyo ordinary Portland cement.Then, add the water that 324g contains the multipolymer of preparation in the polycarboxylic acid multipolymer of preparation in embodiment 9 or 19 or the Comparative Examples described herein 2 in the dark compound, and mix by the slow speed of revolution and to prepare described plaster in 5 minutes toward cement and husky doing.So that its solid matter weight percentage adds the polycarboxylic acid multipolymer of each embodiment or the multipolymer of Comparative Examples with respect to the amount that cement weight (hereinafter referred to as " add-on ") accounts for table 14 indicating value.Mixing condition in the dry blend plaster mixer is identical with each stucco blend of preparation.

(flow measurement method)

Hop to it mixed 6.5 minutes after, toward placing the middle prepared plaster of impouring of miniature slump cone on the stainless steel plate (base diameter=100 millimeter, upper diameter=50 millimeter, highly=150 millimeter).After begin to stir 10 minutes, each miniature slump cone of vertical-lift, the diameter along orthogonal two directional survey plaster are sprawled on stainless steel plate writes down its mean value, as flow valuve (mm).

(add-on is determined method)

Carry out flow valuve and measure when changing add-on, determine the add-on of flow valuve when 190-200mm, the results are shown in Table 14.

(paste preparation method)

With 600g Taiheiyo ordinary Portland cement (trade mark: the product of Taiheiyo Cement) place plaster mixer (trade mark: the product of N-50 Tesco).Did mixed 10 seconds with the slow speed of revolution.Then, add the water that 180g contains the multipolymer for preparing in the polycarboxylic acid multipolymer of preparation among the embodiment 9 or 19 of the definite add-on of institute in the table 14 or the Comparative Examples described herein 2 in the dark compound toward cement and husky doing, and under the slow speed of revolution, mixed 1 minute, then, stop the rotation, the cement that sticks on the wall surface in 30 seconds is partly scraped off, and then the beginning slow speed of revolution mixes, finish mixing after 5 minutes.It is the disposable beaker of 8cm that prepared 400cc is partly placed diameter, and measures its viscosity with Helipath rotational viscosimeter (BrookfieldDV-II/ rotating shaft A91/10 rotation).In this case, the position with rotating shaft transfers to from bottom 3.5cm place.Be controlled in 23 ℃ of following spaces in temperature and measure, the viscosity measurement position of paste or temperature just can not be affected like this.After hopping to it mixed 10 minutes, begin to measure, and viscosity changes in time with the Helipath rotational viscosimeter.Be displayed in Table 14 the viscosity of paste and the state of paste after 3 minutes.

		Embodiment 9	Embodiment 19	Comparative Examples 2
					The polycarboxylic acid multipolymer	Chain-transfer agent	The 1-spicy thioalcohol	The 1-spicy thioalcohol	The 3-thiohydracrylic acid
Weight-average molecular weight	36300	21900	21500
				Plaster		Add-on (weight %/cement)	0.183	0.13	0.127
Flow valuve (mm)	199	192	193
					The cement paste	Add-on (weight %/cement)	0.183	0.13	0.127
The viscosity mPas of paste after 3 minutes)	1120	2880	8320
				The paste state		Homogeneous, no floating matter waterborne	Homogeneous, no floating matter waterborne	Cement precipitation is arranged at the bottom, and waterborne have a small amount of floating matter

When the paste viscosity between the multipolymer that compares Comparative Examples 2 and embodiment 9 or 19, the paste viscosity of the multipolymer of Comparative Examples 2 is 8.320 (mPas), and the paste viscosity of the multipolymer of embodiment 9 or 19 is very low, be 1.120-2.880, the multipolymer of described Comparative Examples 2 is to use hydrophilic chain transfer agent 3-thiohydracrylic acid synthetic, and the multipolymer of embodiment 9 or 19 is to use hydrophobic chain transfer agent 1-spicy thioalcohol synthetic.This shows that the multipolymer that contains by using the hydrophobic grouping that the hydrophobic chain transfer agent introduces compares with the multipolymer Comparative Examples 2 that does not contain this hydrophobic grouping, and its paste viscosity is very low.Find that simultaneously it is uniformly that described paste state is compared with Comparative Examples, and the multipolymer of embodiment is not observed any over-water floats.

Industrial applicability

But having the polybasic carboxylic acid copolymer of above-mentioned structure, the present invention can provide good diminishing capacity and the application properties such as cement composition, and can improve thus intensity and the durability of the product after the sclerosis, therefore when it is used as the component of cement admixture, it is applicable to cement paste, plaster, concrete etc., especially ultra high strength concrete.

Claims (8)

1. polycarboxylic acid multipolymer, described polycarboxylic acid multipolymer comprise by copolymerization and have the monomer component that makes oxyalkylene group be attached to the polyglycol unsaturated monomer (A2) of the structure on the polyvalent alcohol residue and unsaturated monocarboxylic acid monomer (B ') and make.

2. polycarboxylic acid multipolymer, described polycarboxylic acid multipolymer comprise to have by copolymerization makes oxyalkylene group be attached to polyglycol unsaturated monomer structure, hydroxy-end capped on the polyvalent alcohol residue (A2 ') and the monomer component of unsaturated monocarboxylic acid monomer (B) makes.

3. the method for preparing the polycarboxylic acid multipolymer, described method comprise the monomer (A) that uses the copolymerization of hydrophobic chain transfer agent to comprise to have oxyalkylene group and the monomer component of unsaturated carboxylic acid monomer (B).

4. the described method for preparing the polycarboxylic acid multipolymer of claim 3 is characterized in that described hydrophobic chain transfer agent is to have the amine-thiol chain transfer agents that comprises the alkyl that is no less than 3 carbon atoms.

5. polycarboxylic acid multipolymer, described polycarboxylic acid multipolymer is made by claim 3 or the 4 described methods that prepare the polycarboxylic acid multipolymer.

6. cement admixture, described cement admixture comprises claim 1,2 or 5 described polycarboxylic acid multipolymers.

7. cement admixture, the calcium branch value of described cement admixture is that 10-900mPas and/or cement coefficient of refrigeration are 0.05-1.0.

8. during purifying, the determined nitrogen content of ultimate analysis is 0.1-20 weight % after being adjusted to pH12-12.5 for cement admixture, described cement admixture,

In pyrolysis GC-MASS, can measure morpholine, 4-(2-hydroxyethyl) morpholine and 1, the 4-diox,

In GPC, show the crest that does not have replat,

Weight-average molecular weight (Mw) is 300,000,

In IR measures, be presented at 1640-1660 centimetre ^-1The absorption peak at place, its intensity is no more than at 1710-1630 centimetre ^-120% of the absorption peak strength that the place exists,

¹³Among the C-NMR, can measure the chemical shift signal at 60-61ppm and 69-68ppm place,

NMR-PEG content is that 10-99 weight % and TCAV are 3-900 milligram KOH/g.

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