CN110229262A - A kind of covering rheological agent and preparation method thereof - Google Patents
A kind of covering rheological agent and preparation method thereof Download PDFInfo
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- CN110229262A CN110229262A CN201910526619.9A CN201910526619A CN110229262A CN 110229262 A CN110229262 A CN 110229262A CN 201910526619 A CN201910526619 A CN 201910526619A CN 110229262 A CN110229262 A CN 110229262A
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- agent
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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
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a kind of covering rheological agents, its each component is calculated by the percentage of rheological agent gross mass, including cationic monomer 3-8%, anionic monomer 1-3%, hard monomer 25-35%, cross-linking monomer 1-5%, chain-transferring agent 0.1-0.4%, nonionic surfactant 0.25-0.8%, initiator 0.1-0.3%, reducing agent 0.02-0.1%, PH buffer 0.6-1%, preservative 0.1-0.4%, surplus is water.The invention also discloses the preparation methods of above-mentioned covering rheological agent, and reaction kettle is added in the main component for removing initiator and preservative and is heated up after mixing, sequentially add the 25% of initiator total amount in four stages and react simultaneously temperature control, finally cool down and product is made.Preparation method of the present invention is simple, can significantly improve the dispersibility, rheological characteristic, operation stability of coating Minerals granules of pigments, improves the covering etc. of coating, and then improve glossiness, smoothness and the whiteness of coating paper surface, while reducing coating cost.
Description
Technical field
The present invention relates to covering rheological agent more particularly to a kind of dispersing type in high-content calcium carbonate papermaking paint
Rheological agent.
Background technique
With the progress in epoch and the increasingly rise of people's demand, the demand of wrapping paper is more and more high-end.High low side packaging
The difference of paper, except paper base material, the mainly smoothness on its surface.Influence the factor of surface smoothness, mainly surface layer paper
Coarse situation and coating flowing and levelability and false fluid (viscosity of low sheraing is high, and the viscosity of high shear is low).It makes
The main component of paper coating is pigment, adhesive, rheological agent, dispersing agent, lubricant, water repellent agent, defoaming agent etc..Rheology therein
Agent plays the role of the runnability of coating and the Painting effect of coating very important.The ideal coating main spy to be had
Sign is: under low shear conditions there is relatively high viscosity to have relatively low viscosity under high shear conditions, has coating
Preferable dynamic water-retaining property.
In the prior art, the rheological agent level for papermaking paint used by producing is not good enough, it is difficult to meet large arch dam
Coating flowing and levelability, and the covering, smoothness and roughness that further cause coating do not reach requirement, coating
Dynamic water-retaining property be not it is very good, increase the manufacture difficulty of paper.When calcium carbonate is as coating coating pigment, the mobility of coating
Preferably, but because calcium carbonate particle diameter distribution is wide, it is easy to make that coating gloss is low, covering is low, poor water retention property.
Therefore, those skilled in the art is dedicated to developing a kind of dispersing type in high-content calcium carbonate papermaking paint
Rheological agent can improve coating covering, improve coating operation stability.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to papermaking paints in the prior art
Rheological property it is poor, covering is low, the defect of poor water retention property.
To achieve the above object, the present invention provides a kind of covering rheological agents, and each component is by rheological agent gross mass
Percentage calculates, including cationic monomer 3-8%, anionic monomer 1-3%, hard monomer 25-35%, cross-linking monomer 1-5%, chain
Transfer agent 0.1-0.4%, nonionic surfactant 0.25-0.8%, initiator 0.1-0.3%, reducing agent 0.02-0.1%,
PH buffer 0.6-1%, preservative 0.1-0.4%, surplus are water.
The present invention selects cationic monomer and anionic monomer, makes its copolymerization, and with the reasonable chain alkyl monomer of compatibility,
Hard monomer, cross-linking monomer and other components such as chain-transferring agent, nonionic surfactant etc. one work, and it is positive and negative that a kind of band is made
The nanometer cladodification Molecularly Imprinted Polymer of two kinds of charges (both sexes), this copolymer containing there are two types of charge possess preferably in coating
Using effect, so that inorganic pigment granules preferably disperse, to obtain good coating rheological property.
In covering rheological agent of the invention, the cationic monomer is acrylic amine, diallyl amine, triallyl
Amine, N, N- dimethylacrylate, N, TMSDMA N dimethylamine base ethyl propylene acid esters, N, N- dimethylaminoethyl methacrylate, two
Methyl diallyl ammonium chloride, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylyl oxy-ethyl-trimethyl salmiac, methyl
Acryloxypropyl trimethyl ammonium chloride, methacryloxypropyl methylbenzyl ammonium chloride, methacryloxypropyl diformazan
One of base ethyl sulfuric acid ammonium, methacryloxypropyl front three ammonium methyl sulphate are a variety of.
Preferably, the cationic monomer is dimethyl diallyl ammonium chloride, methylacryoyloxyethyl trimethyl
Ammonium chloride, acrylyl oxy-ethyl-trimethyl salmiac, methacryloxypropyl trimethyl ammonium chloride, methacryloxypropyl
One of methylbenzyl ammonium chloride, methacryloxypropyl dimethyl ethyl ammonium sulfate are a variety of.
The anionic monomer is acrylic acid, methacrylic acid, maleic anhydride, itaconic acid, fumaric acid, 2- acrylamide
One of base -2- methyl propane sulfonic acid, methylpropene sodium sulfonate, benzene sulfonic acid sodium salt, 2- acrylamide-2-methylpro panesulfonic acid are more
Kind.
Preferably, the anionic monomer is acrylic acid, in methacrylic acid, maleic anhydride, itaconic acid, fumaric acid
It is one or more.
The hard monomer is styrene, a- methyl styrene, 4- t-butyl styrene, vinyltoluene, chlorobenzene second
Alkene, isobornyl methacrylate, methyl methacrylate, butyl methacrylate, methacrylonitrile, diacrylate new penta 2
One of alcohol ester, phenyl methacrylate are a variety of.
Preferably, the hard monomer is one of styrene, a- methyl styrene, 4- t-butyl styrene or more
Kind.
The cross-linking monomer is hydroxyethyl methacrylate, ethyleneglycol dimethacrylate, polyethylene glycol dimethyl propylene
Olefin(e) acid ester, polytetramethylene glycol double methacrylate, 1.6- hexanediyl ester, dihydroxymethyl tristane diacylate, season
One of penta tetrol triacrylate, trimethylolpropane trimethacrylate are a variety of.
The chain-transferring agent is one of isopropanol, mercaptoethanol, lauryl mercaptan or a variety of.
The nonionic surfactant is PEG400, PEG600, alkyl phenol polyoxyethylene ether, polyoxyethylene fatty acid
One of ester, fatty acid glyceride are a variety of.
The initiator is azodiisobutyronitrile, potassium peroxydisulfate, ammonium persulfate, dibenzoyl peroxide, hydrogen peroxide, nitre
One of sour cerium ammonium is a variety of.
Preferably, the initiator is one or both of potassium peroxydisulfate, ammonium persulfate.With other initiator phases
Than potassium peroxydisulfate, the reactivity of ammonium persulfate are high, and price is low.
The reducing agent be one of sodium sulfite, sodium pyrosulfite, sodium thiosulfate, rongalite or
It is a variety of.
The PH buffer is one or both of sodium bicarbonate, sodium carbonate.
The preservative is 1,2- phenylpropyl alcohol isothiazoline -3- ketone.
The present invention also provides a kind of preparation methods of above-mentioned covering rheological agent, include the following steps:
(1) it according to the mass percent of each component, by water, chain-transferring agent, nonionic surfactant, PH buffer, goes back
Former agent, cationic monomer, anionic monomer, hard monomer and cross-linking monomer are added reaction kettle and are uniformly mixed；
(2) it is passed through steam into reaction kettle, is heated to 60-90 DEG C in high-speed stirred；
(3) mixing speed is reduced, heating is stopped, the 25% of initiator total amount is added, reaction opens cooling water when starting, and protects
Temperature is held to stablize；
(4) reaction after sixty minutes, is added the 25% of initiator total amount for the second time, and temperature is kept to stablize；
(5) after sixty minutes, the 25% of initiator total amount is added in third time for reaction, and temperature is kept to stablize；
(6) it reacts after sixty minutes, the 25% of the 4th addition initiator total amount, the flow by controlling cooling water improves anti-
Answer 2-4 DEG C of temperature；
(7) after sixty minutes, cooling obtains distributed rheological agent for reaction.
Rheological agent produced by the present invention is light yellow transparent liquid, at room temperature viscosity < 500cps, and it is steady to save half a year viscosity
It is fixed.
The mechanism of action of covering rheological agent of the invention are as follows: product of the invention is grafted a large amount of zwitterions on main chain
And other monomers, form the high molecular polymer of special construction；A large amount of existing cation groups make Polymer adsorption
On calcium carbonate granule surface, wrapping layer is formed.Calcium carbonate granule separation and regular arrangement are uniformly dispersed and avoid carbon by the wrapping layer
Sour calcium particle itself wad a quilt with cotton coagulation shallow lake；And complexing is generated from each other, enhance coating low-shear viscosity to a certain degree and is supported
Resistance to stress.In addition, there are more hydrophilic radicals, such as-OH in product, the hydrone in coating can be consolidated, coating is promoted and protects
It is aqueous.
Therefore comparison market existing product, product of the present invention are added in coating, while realizing effective dispersion paints also
It includes (1) and promotes coating low-shear viscosity, (2) promote coating water retention, and (3) higher resistance stress applies in coating process
Expect that immediate viscosity is promoted, promotes coating masks, planarization, and then improve the smoothness and roughness at paper.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is the action principle figure of covering rheological agent of the invention.
Specific embodiment
Its each component of covering rheological agent provided by the invention is calculated by the percentage of rheological agent gross mass, including cation
Monomer 3-8%, anionic monomer 1-3%, hard monomer 25-35%, cross-linking monomer 1-5%, chain-transferring agent 0.1-0.4%, it is non-from
Sub- surfactant 0.25-0.8%, initiator 0.1-0.3%, reducing agent 0.02-0.1%, PH buffer 0.6-1%, anti-corrosion
Agent 0.1-0.4%, surplus are water.
Fig. 1 is the action principle figure of covering rheological agent of the invention.Be grafted on main chain a large amount of zwitterions and other
Monomer forms the high molecular polymer of special construction；A large amount of existing cation groups make Polymer adsorption in carbonic acid
Calcium particle surface forms wrapping layer, and as shown in fig. 1, which is uniformly dispersed calcium carbonate granule separation and regular arrangement
It avoids calcium carbonate granule itself from wadding a quilt with cotton coagulation shallow lake, and generates complexing from each other, enhancing coating low sheraing to a certain degree is viscous
Degree and resistance stress；Since there is also more hydrophilic radicals, such as-OH, the hydrone in coating can be consolidated, coating is promoted and protects
It is aqueous.
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Table 1: the constituent and its mass percent (%) of distributed rheological agent in embodiment 1-3
Embodiment 1
Covering rheological agent provided in this embodiment, preparation method are as follows:
In a kettle be added 60 parts of deionized waters, 5 parts of cationic monomer diallyldimethylammonChloride Chlorides, 1 part of yin from
Sub- monomeric acrylic, 30 parts of hard monomer styrene, 2 parts of cross-linking monomer hydroxyethyl methacrylates, 0.2 part of chain-transferring agent sulfydryl second
Alcohol, 0.4 part of nonionic surfactant alkyl phenol polyoxyethylene ether, 0.1 part of reducing agent sodium sulfite, 0.8 part of PH buffer carbon
Sour hydrogen sodium unlatching is uniformly mixed, and is heated to 60 DEG C, keeps the temperature 10-20 minutes；
Accelerate mixing speed, and be warming up to 90 DEG C, keeps the temperature 10-20 minutes；
Mixing speed is reduced, the 25% of initiator total amount (0.2 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) is added
(i.e. 0.05 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) starts reaction and temperature is kept to stablize；
Reaction after sixty minutes, is added the 25% of initiator total amount for the second time, and temperature is kept to stablize；
After sixty minutes, the 25% of initiator total amount is added in third time for reaction, and temperature is kept to stablize；
It reacts after sixty minutes, the 25% of the 4th addition initiator total amount, control reaction temperature promotes 2-4 DEG C, i.e. 92-94
℃；
Reaction after sixty minutes, is cooled to 80 DEG C, 0.3 portion of preservative 1 is added, 2- phenylpropyl alcohol isothiazoline -3- ketone can be prepared by
Covering rheological agent, appearance are weak yellow liquid, and viscosity at ambient temperature < 500cps can stablize storage half a year.
Embodiment 2
In a kettle be added 60 parts of deionized waters, 6 parts of cationic monomer diallyldimethylammonChloride Chlorides, 1 part of yin from
Sub- monomeric acrylic, 28 parts of hard monomer styrene, 3 parts of cross-linking monomer hydroxyethyl methacrylates, 0.2 part of chain-transferring agent sulfydryl second
Alcohol, 0.6 part of nonionic surfactant alkyl phenol polyoxyethylene ether, 0.1 part of reducing agent sodium sulfite, 0.6 part of PH buffer carbon
Sour hydrogen sodium unlatching is uniformly mixed, and is heated to 60 DEG C, keeps the temperature 10-20 minutes；
Accelerate mixing speed, and be warming up to 90 DEG C, keeps the temperature 10-20 minutes；
Mixing speed is reduced, the 25% of initiator total amount (0.2 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) is added
(i.e. 0.05 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) starts reaction and temperature is kept to stablize；
Reaction after sixty minutes, is added the 25% of initiator total amount for the second time, and temperature is kept to stablize；
After sixty minutes, the 25% of initiator total amount is added in third time for reaction, and temperature is kept to stablize；
It reacts after sixty minutes, the 25% of the 4th addition initiator total amount, control reaction temperature promotes 2-4 DEG C, i.e. 92-94
℃；
Reaction after sixty minutes, is cooled to 80 DEG C, 0.3 portion of preservative 1 is added, 2- phenylpropyl alcohol isothiazoline -3- ketone can be prepared by
Covering rheological agent, appearance are weak yellow liquid, and viscosity at ambient temperature < 500cps can stablize storage half a year.
Embodiment 3
60 parts of deionized waters, 8 parts of cationic monomer diallyldimethylammonChloride Chlorides, 0.5 part of yin are added in a kettle
Ion monomer acrylic acid, 25 parts of hard monomer styrene, 4 parts of cross-linking monomer hydroxyethyl methacrylates, 0.4 part of chain-transferring agent sulfydryl
Ethyl alcohol, 0.7 part of nonionic surfactant alkyl phenol polyoxyethylene ether, 0.1 part of reducing agent sodium sulfite, 0.7 part of PH buffer
Sodium bicarbonate unlatching is uniformly mixed, and is heated to 60 DEG C, keeps the temperature 10-20 minutes；
Accelerate mixing speed, and be warming up to 90 DEG C, keeps the temperature 10-20 minutes；
Mixing speed is reduced, the 25% of initiator total amount (0.3 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) is added
(i.e. 0.075 part of ammonium persulfate and potassium peroxydisulfate 1:1 mixture) starts reaction and temperature is kept to stablize；
Reaction after sixty minutes, is added the 25% of initiator total amount for the second time, and temperature is kept to stablize；
After sixty minutes, the 25% of initiator total amount is added in third time for reaction, and temperature is kept to stablize；
It reacts after sixty minutes, the 25% of the 4th addition initiator total amount, control reaction temperature promotes 2-4 DEG C, i.e. 92-94
℃；
Reaction after sixty minutes, is cooled to 80 DEG C, 0.3 portion of preservative 1 is added, 2- phenylpropyl alcohol isothiazoline -3- ketone can be prepared by
Covering rheological agent, appearance are weak yellow liquid, and viscosity at ambient temperature < 500cps can stablize storage half a year.
Coating and paper test
Coating: GCC-95 (calcium carbonate pigment) and water are first added in blender；Unlatching mixing speed is 7000-
7500 revs/min, dispersing agent is then added, adds china clay and stirs 10 minutes, it is fully dispersed, latex is then added, stirs 3 points
Clock is fully dispersed, adds converted starch, and stirring 3 minutes fully dispersed, sequentially adds water repellent agent, lubricant and rheology
Agent is sufficiently stirred 30 minutes, finally using 20% caustic soda adjusting coating system pH between 9-11.
5 groups of parallel formulation for coating material assessment experiments are designed, it is unique the difference is that being the difference of added rheological agent, Paint evaluation
Formula is as shown in table 2.
Table 2: each Paint evaluation formula of T1-T5 is tested
Coating dosage of each component is the dry weight weight relative to GCC-95 (calcium carbonate pigment), such as embodiment 1 in table 2
(T-3) in, the dosage of GCC-95 is 90 parts, and the dosage of rheological agent is 0.13 part.
The coating of T-1 to T-5 is coated with laboratory room small-sized coating machine, is tested for the property after coating, extremely by T-1
The results are shown in Table 3 for T-5 coating and paper test.
Table 3:T-1 is to T-5 coating and paper test result
Interpretation of result:
From table 2, table 3 as can be seen that after 0.13 part of rheological agent is only used only, the coating of configuration rises in 4400rpm
Stage viscosity is high and 4400rpm decline stage viscosity is low, shows that coating has very strong stress to resist；With good water-retaining property；
Paper after being coated with simultaneously has preferable smoothness and lower roughness, and paper is more smooth, high-end.
In conclusion covering rheological agent of the invention has the advantage that
1, production, preparation process are simple, and no harmful bi-products generate, and viscosity of the coating can be reduced when configuring coating and promotes painting
Material is prepared to be contained admittedly, improves speed, improving production efficiency.
2, high shear excellent in coating process enhances coating levelability, planarization, improves paper surface smoothness
And roughness.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of covering rheological agent, which is characterized in that its each component by rheological agent gross mass percentage calculate, including sun from
It is sub- monomer 3-8%, anionic monomer 1-3%, hard monomer 25-35%, cross-linking monomer 1-5%, chain-transferring agent 0.1-0.4%, non-
Ionic surface active agent 0.25-0.8%, initiator 0.1-0.3%, reducing agent 0.02-0.1%, PH buffer 0.6-1%, prevent
Rotten agent 0.1-0.4%, surplus are water；Wherein,
The cationic monomer is acrylic amine, diallyl amine, triallylamine, N, N- dimethylacrylate, N, N- bis-
Methylamino ethyl propylene acid esters, N, N- dimethylaminoethyl methacrylate, dimethyl diallyl ammonium chloride, methacryl
Oxy-ethyl-trimethyl salmiac, acrylyl oxy-ethyl-trimethyl salmiac, methacryloxypropyl trimethyl ammonium chloride, methyl
Acryloxypropyl methylbenzyl ammonium chloride, methacryloxypropyl dimethyl ethyl ammonium sulfate, methacryloxypropyl
One of front three ammonium methyl sulphate is a variety of；
The anionic monomer is acrylic acid, methacrylic acid, maleic anhydride, itaconic acid, fumaric acid, 2- acrylamido -2-
One of methyl propane sulfonic acid, methylpropene sodium sulfonate, benzene sulfonic acid sodium salt, 2- acrylamide-2-methylpro panesulfonic acid are a variety of.
2. covering rheological agent as described in claim 1, which is characterized in that the hard monomer is styrene, a- methylbenzene second
Alkene, 4- t-butyl styrene, vinyltoluene, chlorostyrene, isobornyl methacrylate, methyl methacrylate, first
One of base butyl acrylate, methacrylonitrile, diacrylic acid pentyl diol ester, phenyl methacrylate are a variety of.
3. covering rheological agent as described in claim 1, which is characterized in that the cross-linking monomer is hydroxyethyl methacrylate second
Ester, ethyleneglycol dimethacrylate, polyethylene glycol dimethacrylate, polytetramethylene glycol double methacrylate, 1.6- hexylene glycol two
Acrylate, dihydroxymethyl tristane diacylate, pentaerythritol triacrylate, trimethylolpropane trimethacrylate
One of or it is a variety of.
4. covering rheological agent as described in claim 1, which is characterized in that the chain-transferring agent be isopropanol, mercaptoethanol,
One of lauryl mercaptan is a variety of.
5. covering rheological agent as described in claim 1, which is characterized in that the nonionic surfactant be PEG400,
One of PEG600, alkyl phenol polyoxyethylene ether, polyoxyethylene fatty acid ester, fatty acid glyceride are a variety of.
6. covering rheological agent as described in claim 1, which is characterized in that the initiator is azodiisobutyronitrile, over cure
One of sour potassium, ammonium persulfate, dibenzoyl peroxide, hydrogen peroxide, ammonium ceric nitrate are a variety of.
7. covering rheological agent as described in claim 1, which is characterized in that the reducing agent is sodium sulfite, pyrosulfurous acid
One of sodium, sodium thiosulfate, rongalite are a variety of.
8. covering rheological agent as described in claim 1, which is characterized in that the PH buffer is sodium bicarbonate, sodium carbonate
One or both of.
9. covering rheological agent as described in claim 1, which is characterized in that the preservative is 1,2- phenylpropyl alcohol isothiazoline-
3- ketone.
10. a kind of preparation method of covering rheological agent as claimed in any one of claims 1-9 wherein, which is characterized in that including
Following steps:
(1) according to the mass percent of each component, by water, chain-transferring agent, nonionic surfactant, PH buffer, reducing agent,
Cationic monomer, anionic monomer, hard monomer and cross-linking monomer are added reaction kettle and are uniformly mixed；
(2) it is passed through steam into reaction kettle, is heated to 60-90 DEG C in high-speed stirred；
(3) mixing speed is reduced, heating is stopped, the 25% of initiator total amount is added, cooling water is opened in reaction when starting, keep temperature
Degree is stablized；
(4) reaction after sixty minutes, is added the 25% of initiator total amount for the second time, and temperature is kept to stablize；
(5) after sixty minutes, the 25% of initiator total amount is added in third time for reaction, and temperature is kept to stablize；
(6) it reacts after sixty minutes, the 25% of the 4th addition initiator total amount, the flow for passing through control cooling water, which improves, reacts warm
2-4 DEG C of degree；
(7) after sixty minutes, cooling obtains distributed rheological agent for reaction.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114635309A (en) * | 2022-02-22 | 2022-06-17 | 江苏博汇纸业有限公司 | Papermaking method for high-conductivity water environment |
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| CN104558406A (en) * | 2015-01-27 | 2015-04-29 | 江苏富淼科技股份有限公司 | Preparation method of amphoteric polyacrylamide dispersion liquid |
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