CN109232830A - A kind of preparation method of concrete slump retaining type reinforcing agent - Google Patents
A kind of preparation method of concrete slump retaining type reinforcing agent Download PDFInfo
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- CN109232830A CN109232830A CN201811090909.5A CN201811090909A CN109232830A CN 109232830 A CN109232830 A CN 109232830A CN 201811090909 A CN201811090909 A CN 201811090909A CN 109232830 A CN109232830 A CN 109232830A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/243—Phosphorus-containing polymers
- C04B24/246—Phosphorus-containing polymers containing polyether side chains
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
Abstract
The invention discloses a kind of preparation methods of concrete slump retaining type reinforcing agent, include the following steps: that (1) disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, then double trimethylsilyl vinyl phosphates are added, 4.5-5.5h is reacted at 50-60 DEG C, centrifuge washing is dry, obtains the graphene oxide of double bond modification；(2) graphene oxide, unsaturated acids, esterification monomer and water that polyether monomer, double bond are modified are added in reaction kettle, it is to be mixed to be uniformly dispersed；Then it is added at one time potassium peroxydisulfate, after 9-12min, the first solution and third solution is first added dropwise, after 9-12min, then the second solution is added dropwise；(3) after completion of dropwise addition, triisopropanolamine is added, then keeps the temperature, sodium metasilicate is added and is neutralized to get the concrete slump retaining type reinforcing agent is arrived.The present invention is using graphene oxide as template when aquation, to realize the order of aquation, it is microcosmic on change the pattern of hydrated product, realize the promotion of performance.
Description
Technical field
The invention belongs to build additive technical field, and in particular to a kind of preparation side of concrete slump retaining type reinforcing agent
Method.
Background technique
With the progress of modernized society of China, as city, traffic, water conservancy, agricultural construction main material concrete
Also more and more generally received by society, concrete usage amount is huge, and Chinese cement yield in 2017 is about 23.2 hundred million tons, and the whole nation is mixed
Solidifying soil additive usage amount is about 14,000,000 tons, and cubic amount of concrete is about 20 billion cubic meters, and concrete usage amount becomes the world the
One.
Compression strength and durability are the mostly important performance indicators of concrete.In the production process of commerical ready-mixed concrete,
In order to improve the working performance of concrete and improve the intensity of concrete, it is often necessary to each of proportion very little be added into concrete
The addition of kind concrete admixture (such as water-reducing agent, air entraining agent), these additives usually improves the working performance of concrete
Preferably, very limited to the improvement of concrete strength, and some additives are more sensitive, and the adaptability to concrete is not very
Good, this is but also these additives have been more limited in a particular application, and concrete intensifier compensates for
This defect basically reaches abundant aquation due to its high force dispersion flocculated particle, to improve the activity of cementitious material.
Concrete intensifier can be divided into inorganic, organic and inorganic and organic composite type by its material composition, early stage
Reinforcing agent is generally inorganic, has such as been come out for many years by the cement intensifier of substrate of natural zeolite.Organic is high polymer
Material cladding forms, and is the new varieties just occurred in recent years, but less, the relevant patent of mechanism research domestic at present
It is considerably less.Through the modified cement of concrete intensifier one can be tightly bonded in original concrete structure and steel construction
It rises, to effectively improve the compression strength of structure, flexural strength will also improve 2 to 3 times.
Summary of the invention
It is an object of the invention to overcome prior art defect, a kind of preparation side of concrete slump retaining type reinforcing agent is provided
Method.
Technical scheme is as follows:
A kind of preparation method of concrete slump retaining type reinforcing agent, includes the following steps:
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 1-5, is reacted at 50-60 DEG C
4.5-5.5h, centrifuge washing is dry, obtains the graphene oxide of double bond modification；
(2) by the polyether monomer of 100 parts by weight, the graphene oxide of 5-10 parts by weight double bond modification, 10 parts by weight insatiable hungers
It is added in reaction kettle with acid, 5-10 parts by weight esterification monomer and 100 parts by weight water, it is to be mixed to be uniformly dispersed；Then disposable
1-3 parts by weight potassium peroxydisulfate is added, after 9-12min, the first solution and third solution is first added dropwise, after 9-12min, then is added dropwise the
Two solution；
(3) after completion of dropwise addition, the triisopropanolamine of 5-10 parts by weight is added, then keeps the temperature 55-65min, sodium metasilicate is added
It carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived；
Wherein, polyether monomer is carboxyl terminated vinyl ether epoxy, and esterification monomer is polyethyleneglycol diacrylate, and first is molten
Liquid is the aqueous solution of reducing agent, and wherein the concentration of solute is 4-6wt%, and the second solution is unsaturated phosphate ester monomer, unsaturation
The aqueous solution of Arrcostab and chain-transferring agent, wherein the concentration of solute is 45-55wt%；Third solution is the aqueous solution of oxidant,
Wherein the concentration of solute is 7-9wt%, and unsaturated phosphate ester monomer is acrylyl oxy-ethyl phosphate, di(2-ethylhexyl)phosphate (acrylic acid hydroxyl
Ethyl) ester or phosphoric acid hydrogen two (methylacryoyloxyethyl) ester, unsaturated alkyl ester is hydroxy-ethyl acrylate, acrylic acid hydroxypropyl
Ester, hydroxyethyl methacrylate or hydroxy propyl methacrylate.
In a preferred embodiment of the invention, the molecular weight of the carboxyl terminated vinyl ether epoxy is 3000.
In a preferred embodiment of the invention, the unsaturated acids is acrylic acid, itaconic acid or maleic acid.
In a preferred embodiment of the invention, the polyethylene glycol in the polyethyleneglycol diacrylate is PEG-
200, PEG-400 or PEG-600.
In a preferred embodiment of the invention, the reducing agent be sodium formaldehyde sulfoxylate, it is vitamin C, sodium hydrogensulfite, secondary
Sodium phosphate or 2- hydroxyl -2- sulfinatoacetic acid dipotassium.
In a preferred embodiment of the invention, the dosage of the reducing agent is the 2-5wt% of the polyether monomer.
In a preferred embodiment of the invention, the chain-transferring agent is thioacetic acid, 3- mercaptopropionic acid, 2- sulfydryl
Propyl alcohol or mercaptoethanol.
In a preferred embodiment of the invention, the oxidant is hydrogen peroxide, ammonium persulfate, sodium peroxydisulfate or mistake
Potassium sulfate.
In a preferred embodiment of the invention, the dosage of the oxidant is the 2-5wt% of the polyether monomer.
In a preferred embodiment of the invention, the polyether monomer, unsaturated phosphate ester monomer, unsaturated alkyl
The mass ratio of ester and chain-transferring agent is 100: 5-10: 5-10: 1-3.
The beneficial effects of the present invention are:
1, the present invention is using graphene oxide as template when aquation, to realize the order of aquation, it is microcosmic on change
The pattern for having become hydrated product realizes the promotion of performance；
2, the present invention can form the feature of new silicon oxygen bond using silane with hydrolysis product of cement, from hydrolysis product of cement
The angle of C-S-H gel polymerisation degree is enhanced, and the mechanical property of concrete is promoted using the flexibility of organic molecule；
3, in preparation method of the invention, the speed of the molecule release adsorption group containing ester group is significantly larger than phosphorous acidic group point
The rate of release of son, therefore esters can be introduced, the adsorption group of early stage is provided, and phosphate molecule provides the absorption base in later period
Group, reaching in longer time has enough adsorption groups to provide, and meets the needs of disperse cement particles.
Specific embodiment
Technical solution of the present invention is further explained and described below by way of specific embodiment.
Embodiment 1
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 3, is placed at 50 DEG C and reacts 5h,
Centrifuge washing is dry, obtains the graphene oxide of double bond modification.
(2) oxygen for modifying the carboxyl terminated vinyl ether epoxy (molecular weight 3000) of 100 parts by weight, 5 parts by weight double bonds
Graphite alkene, 10 parts by weight of acrylic acid, 7.5 parts by weight polyethyleneglycol diacrylates (PEG-200) and 100 parts by weight water are added
It is to be mixed to be uniformly dispersed into reaction kettle；Then it is added at one time 1 parts by weight potassium peroxydisulfate, then after 10min, is first added dropwise
After 10min, then the second solution is added dropwise in one solution and third solution.
(3) after completion of dropwise addition, the triisopropanolamine of 5 parts by weight is added, then keeps the temperature 60min, a certain amount of silicic acid is added
Sodium carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived.
Wherein the first solution is sodium formaldehyde sulfoxylate solution, and the dosage of sodium formaldehyde sulfoxylate is the 2- of carboxyl terminated vinyl epoxy ether monomer
5wt%, wherein the concentration of solute is 5wt%, and the second solution is acrylyl oxy-ethyl phosphate, hydroxy-ethyl acrylate and sulfydryl second
The solution of acid composition, wherein the concentration of solute is 50wt%；Third solution is hydrogen peroxide solution, and the dosage of hydrogen peroxide is carboxyl end group
The 2-5wt% of vinyl epoxy ether monomer, wherein the concentration of solute is 8wt%, carboxyl terminated vinyl ether epoxy, acryloyl-oxy second
The mass ratio of base phosphate, hydroxy-ethyl acrylate and thioacetic acid is 100: 5: 10: 1
Embodiment 2
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 5, is placed at 60 DEG C and reacts 5h,
Centrifuge washing is dry, obtains the graphene oxide of double bond modification.
(2) oxygen for modifying the carboxyl terminated vinyl ether epoxy (molecular weight 3000) of 100 parts by weight, 10 parts by weight double bonds
Graphite alkene, 10 parts by weight itaconic acids, 5 parts by weight polyethyleneglycol diacrylates (PEG-400) and 100 parts by weight water are added to
It is to be mixed to be uniformly dispersed in reaction kettle；Then 2 parts by weight potassium peroxydisulfates are added at one time and are first added dropwise first then after 10min
After 10min, then the second solution is added dropwise in solution and third solution.
(3) after completion of dropwise addition, the triisopropanolamine of 10 parts by weight is added, then keeps the temperature 60min, a certain amount of silicic acid is added
Sodium carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived.
Wherein the first solution is ascorbic aqueous solution, and ascorbic dosage is carboxyl terminated vinyl epoxy ether monomer
2-5wt%, wherein the concentration of solute be 5wt%, the second solution be di(2-ethylhexyl)phosphate (hydroxy ethyl) ester, hydroxypropyl acrylate and
The aqueous solution of 3- mercaptopropionic acid, wherein the concentration of solute is 50wt%；Third solution is the aqueous solution of ammonium persulfate, ammonium persulfate
Dosage be carboxyl terminated vinyl epoxy ether monomer 2-5wt%, wherein the concentration of solute be 8wt%, carboxyl terminated vinyl ring
Oxygen ether, di(2-ethylhexyl)phosphate (hydroxy ethyl) ester, hydroxypropyl acrylate and 3- mercaptopropionic acid mass ratio be 100: 8: 7: 2
Embodiment 3
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 1, is placed at 50 DEG C and reacts 5h,
Centrifuge washing is dry, obtains the graphene oxide of double bond modification.
(2) the carboxyl terminated vinyl ether epoxy (molecular weight 3000) of 100 parts by weight, 7.5 parts by weight double bonds are modified
Graphene oxide, 10 parts by weight of maleic, 10 parts by weight polyethyleneglycol diacrylates (PEG-600) and 100 parts by weight water add
Enter into reaction kettle, it is to be mixed to be uniformly dispersed；Then 3 parts by weight potassium peroxydisulfates are added at one time first to be added dropwise then after 10min
After 10min, then the second solution is added dropwise in first solution and third solution.
(3) after completion of dropwise addition, the triisopropanolamine of 6 parts by weight is added, then keeps the temperature 60min, a certain amount of silicic acid is added
Sodium carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived.
Wherein the first solution is the aqueous solution of sodium hydrogensulfite, and the dosage of sodium hydrogensulfite is carboxyl terminated vinyl ether epoxy
The 2-5wt% of monomer, wherein the concentration of solute is 5wt%, and the second solution is phosphoric acid hydrogen two (methylacryoyloxyethyl) ester, first
The aqueous solution of base hydroxy-ethyl acrylate and 2- mercaprol, wherein the concentration of solute is 50wt%；Third solution is potassium peroxydisulfate
Aqueous solution, the dosage of potassium peroxydisulfate is the 2-5wt% of carboxyl terminated vinyl epoxy ether monomer, and wherein the concentration of solute is
8wt%；Carboxyl terminated vinyl ether epoxy, phosphoric acid hydrogen two (methylacryoyloxyethyl) ester, hydroxyethyl methacrylate and 2- mercapto
The mass ratio of base propyl alcohol is 100: 10: 5: 3.
Embodiment 4
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 5, is placed at 60 DEG C and reacts 5h,
Centrifuge washing is dry, obtains the graphene oxide of double bond modification.
(2) oxygen for modifying the carboxyl terminated vinyl ether epoxy (molecular weight 3000) of 100 parts by weight, 8 parts by weight double bonds
Graphite alkene, 10 parts by weight of acrylic acid, 5-10 parts by weight polyethyleneglycol diacrylate (PEG-400) and 100 parts by weight water add
Enter into reaction kettle, it is to be mixed to be uniformly dispersed；Then 1.5 parts by weight potassium peroxydisulfates are added at one time first to drip then after 10min
Add the first solution and third solution, after 10min, then the second solution is added dropwise.
(3) after completion of dropwise addition, the triisopropanolamine of 6 parts by weight is added, then keeps the temperature 60min, a certain amount of silicic acid is added
Sodium carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived.
Wherein the first solution is the aqueous solution of 2- hydroxyl -2- sulfinatoacetic acid dipotassium, 2- hydroxyl -2- sulfinatoacetic acid
The dosage of dipotassium is the 2-5wt% of carboxyl terminated vinyl epoxy ether monomer, and wherein the concentration of solute is 5wt%；Second solution is
The aqueous solution of di(2-ethylhexyl)phosphate (hydroxy ethyl) ester, hydroxy propyl methacrylate and mercaptoethanol, wherein the concentration of solute be
50wt%；Third solution is the aqueous solution of sodium peroxydisulfate, and the dosage of sodium peroxydisulfate is the 2- of carboxyl terminated vinyl epoxy ether monomer
5wt%, wherein the concentration of solute is 8wt%；Carboxyl terminated vinyl ether epoxy, di(2-ethylhexyl)phosphate (hydroxy ethyl) ester, methyl-prop
The mass ratio of olefin(e) acid hydroxypropyl acrylate and mercaptoethanol is 100: 6: 9: 1.5.
Embodiment 1 to 4 is synthesized to obtained concrete slump retaining type reinforcing agent, using standard cement, volume presses cement quality
0.2%, according to GB 8076-2008 " concrete admixture " and GB/T 50081-2002 " normal concrete mechanical property test
Method standard ", survey concrete crushing strength and 28d shrinking percentage.Concrete mix are as follows: cement 360kg/m3, sand 803kg/m3、
Stone 982kg/m3, in 210 ± 10mm, acquired results are as shown in table 1 for slump control.
The concrete performance for the sample that table 1 is synthesized using embodiment
| Sample | Benchmark | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Initial slump | 210 | 205 | 210 | 215 | 210 |
| The slump after 1h | 160 | 200 | 210 | 210 | 205 |
| 7d compression strength/MPa | 18.6 | 19.4 | 20.4 | 21.2 | 18.7 |
| 28d compression strength/MPa | 30.4 | 33.6 | 34.9 | 32.7 | 33.1 |
| 90d compression strength/MPa | 33.8 | 35.2 | 37.1 | 34.6 | 36.7 |
| 28d shrinkage ratio/% | 100 | 65 | 60 | 55 | 45 |
As shown in Table 1, using concrete slump retaining type reinforcing agent prepared by the present invention, have function of slump protection good, agent on crack resistance of concrete
Compressive Strength height and the low feature of shrinking percentage.
Those of ordinary skill in the art still are able to it is found that when technical solution of the present invention changes in following ranges
To same as the previously described embodiments or similar technical solution, protection scope of the present invention is still fallen within:
A kind of preparation method of concrete slump retaining type reinforcing agent, includes the following steps:
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl is then added
The mass ratio of phosphate, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 1-5, is reacted at 50-60 DEG C
4.5-5.5h, centrifuge washing is dry, obtains the graphene oxide of double bond modification；
(2) by the polyether monomer of 100 parts by weight, the graphene oxide of 5-10 parts by weight double bond modification, 10 parts by weight insatiable hungers
It is added in reaction kettle with acid, 5-10 parts by weight esterification monomer and 100 parts by weight water, it is to be mixed to be uniformly dispersed；Then disposable
1-3 parts by weight potassium peroxydisulfate is added, after 9-12min, the first solution and third solution is first added dropwise, after 9-12min, then is added dropwise the
Two solution；
(3) after completion of dropwise addition, the triisopropanolamine of 5-10 parts by weight is added, then keeps the temperature 55-65min, sodium metasilicate is added
It carries out being neutralized to pH=7-8 to get the concrete slump retaining type reinforcing agent is arrived；
Wherein, polyether monomer is carboxyl terminated vinyl ether epoxy, and esterification monomer is polyethyleneglycol diacrylate, and first is molten
Liquid is the aqueous solution of reducing agent, and wherein the concentration of solute is 4-6%, and the second solution is unsaturated phosphate ester monomer, unsaturated alkane
The aqueous solution of base ester and chain-transferring agent, wherein the concentration of solute is 45-55wt%；Third solution is the aqueous solution of oxidant,
The concentration of middle solute is 7-9%, and unsaturated phosphate ester monomer is acrylyl oxy-ethyl phosphate, di(2-ethylhexyl)phosphate (hydroxy ethyl)
Ester or phosphoric acid hydrogen two (methylacryoyloxyethyl) ester, unsaturated alkyl ester are hydroxy-ethyl acrylate, hydroxypropyl acrylate, methyl
Hydroxy-ethyl acrylate or hydroxy propyl methacrylate.
The molecular weight of the carboxyl terminated vinyl ether epoxy is 3000.The unsaturated acids is acrylic acid, itaconic acid or horse
Come sour.Polyethylene glycol in the polyethyleneglycol diacrylate is PEG-200, PEG-400 or PEG-600.The reducing agent
For sodium formaldehyde sulfoxylate, vitamin C, sodium hydrogensulfite, sodium hypophosphite or 2- hydroxyl -2- sulfinatoacetic acid dipotassium.The chain-transferring agent
For thioacetic acid, 3- mercaptopropionic acid, 2- mercaprol or mercaptoethanol.The oxidant is hydrogen peroxide, ammonium persulfate, persulfuric acid
Sodium or potassium peroxydisulfate.The polyether monomer, unsaturated phosphate ester monomer, unsaturated alkyl ester and chain-transferring agent mass ratio be
100∶5-10∶5-10∶1-3。
The foregoing is only a preferred embodiment of the present invention, the range that the present invention that therefore, it cannot be limited according to is implemented, i.e.,
Equivalent changes and modifications made in accordance with the scope of the invention and the contents of the specification should still be within the scope of the present invention.
Claims (10)
1. a kind of preparation method of concrete slump retaining type reinforcing agent, characterized by the following steps:
(1) it disperses graphene oxide in dehydrated alcohol, ultrasonic disperse, double trimethylsilyl vinyl phosphoric acids is then added
The mass ratio of ester, graphene oxide and double trimethylsilyl vinyl phosphates is 1: 1-5, reacts 4.5- at 50-60 DEG C
5.5h, centrifuge washing is dry, obtains the graphene oxide of double bond modification；
(2) by the polyether monomer of 100 parts by weight, 5-10 parts by weight double bond modify graphene oxide, 10 parts by weight unsaturated acids,
5-10 parts by weight esterification monomer and 100 parts by weight water are added in reaction kettle, to be mixed to be uniformly dispersed；Then it is added at one time 1-
After 9-12min, the first solution and third solution is first added dropwise in 3 parts by weight potassium peroxydisulfates, and after 9-12min, then to be added dropwise second molten
Liquid；
(3) after completion of dropwise addition, the triisopropanolamine of 5-10 parts by weight is added, then keeps the temperature 55-65min, sodium metasilicate is added and carries out
PH=7-8 is neutralized to get the concrete slump retaining type reinforcing agent is arrived；
Wherein, polyether monomer is carboxyl terminated vinyl ether epoxy, and esterification monomer is polyethyleneglycol diacrylate, and the first solution is
The aqueous solution of reducing agent, wherein the concentration of solute is 4-6wt%, and the second solution is unsaturated phosphate ester monomer, unsaturated alkyl
The aqueous solution of ester and chain-transferring agent, wherein the concentration of solute is 45-55wt%；Third solution is the aqueous solution of oxidant, wherein
The concentration of solute is 7-9wt%, and unsaturated phosphate ester monomer is acrylyl oxy-ethyl phosphate, di(2-ethylhexyl)phosphate (hydroxy ethyl)
Ester or phosphoric acid hydrogen two (methylacryoyloxyethyl) ester, unsaturated alkyl ester are hydroxy-ethyl acrylate, hydroxypropyl acrylate, methyl
Hydroxy-ethyl acrylate or hydroxy propyl methacrylate.
2. preparation method as described in claim 1, it is characterised in that: the molecular weight of carboxyl terminated vinyl ether epoxy is 3000.
3. preparation method as described in claim 1, it is characterised in that: the unsaturated acids is acrylic acid, itaconic acid or Malaysia
Acid.
4. preparation method as described in claim 1, it is characterised in that: the polyethylene glycol in the polyethyleneglycol diacrylate
For PEG-200, PEG-400 or PEG-600.
5. preparation method as described in claim 1, it is characterised in that: the reducing agent is sodium formaldehyde sulfoxylate, vitamin C, sulfurous acid
Hydrogen sodium, sodium hypophosphite or 2- hydroxyl -2- sulfinatoacetic acid dipotassium.
6. preparation method as described in claim 1, it is characterised in that: the dosage of the reducing agent is the 2- of the polyether monomer
5wt%.
7. preparation method as described in claim 1, it is characterised in that: the chain-transferring agent be thioacetic acid, 3- mercaptopropionic acid,
2- mercaprol or mercaptoethanol.
8. preparation method as described in claim 1, it is characterised in that: the oxidant is hydrogen peroxide, ammonium persulfate, persulfuric acid
Sodium or potassium peroxydisulfate.
9. preparation method as described in claim 1, it is characterised in that: the dosage of the oxidant is the 2- of the polyether monomer
5wt%.
10. preparation method as described in claim 1, it is characterised in that: the polyether monomer, unsaturated phosphate ester monomer, no
The mass ratio of saturated alkyl ester and chain-transferring agent is 100: 5-10: 5-10: 1-3.
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| CN114014975A (en) * | 2021-11-09 | 2022-02-08 | 云南森博混凝土外加剂有限公司 | Concrete reinforcing agent and preparation method thereof |
| CN114349386A (en) * | 2021-12-28 | 2022-04-15 | 重庆建研科之杰新材料有限公司 | Concrete water reducing agent and preparation method and application thereof |
| CN114478962A (en) * | 2021-12-27 | 2022-05-13 | 科之杰新材料集团有限公司 | Slump loss prevention early-strength functional monomer, slump loss prevention early-strength polycarboxylate superplasticizer and preparation method thereof |
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| CN114014975A (en) * | 2021-11-09 | 2022-02-08 | 云南森博混凝土外加剂有限公司 | Concrete reinforcing agent and preparation method thereof |
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| CN114478962B (en) * | 2021-12-27 | 2023-08-25 | 科之杰新材料集团有限公司 | Slump-retaining early-strength functional monomer, slump-retaining early-strength polycarboxylate superplasticizer and preparation method thereof |
| CN114349386A (en) * | 2021-12-28 | 2022-04-15 | 重庆建研科之杰新材料有限公司 | Concrete water reducing agent and preparation method and application thereof |
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