CN113773704B - PVC (polyvinyl chloride) water-based primer and preparation method thereof - Google Patents
PVC (polyvinyl chloride) water-based primer and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D107/00—Coating compositions based on natural rubber
- C09D107/02—Latex
-
- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or 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 a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2407/00—Characterised by the use of natural rubber
- C08J2407/02—Latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Adhesives Or Adhesive Processes (AREA)
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Abstract
The invention belongs to the technical field of PVC adhesive tapes, and particularly relates to a PVC water-based primer and a preparation method thereof, wherein the primer comprises latex and acrylic resin which is crosslinked with the latex, the acrylic resin is prepared by emulsion polymerization of butyl acrylate, methyl methacrylate, hydroxyethyl and methacrylic acid in water, and the solid content of the acrylic resin is 45-50%. The primer provided by the invention has the characteristic that the tackifying effect is not ineffective at high temperature.
Description
Technical Field
The invention belongs to the technical field of PVC adhesive tapes, and particularly relates to a PVC water-based primer and a preparation method thereof.
Background
In the prior art, in order to improve the adhesion between the PVC substrate and the adhesive surface layer, a primer is generally applied between the PVC substrate and the adhesive surface layer. In the existing primer, toluene, xylene and the like are used as solvents, so that the environment is seriously polluted, and the health of production personnel and hot-pressing operators is injured; and the existing primer has the problem of bonding failure at high temperature, and the quality of the PVC adhesive tape is seriously influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: providing a water-based primer which does not lose the tackifying effect at high temperature;
further provides a preparation method of the water-based primer.
In order to solve the technical problems, the invention provides a PVC water-based primer, which comprises latex and acrylic resin crosslinked with the latex, wherein the acrylic resin is formed by emulsion polymerization of butyl acrylate, methyl methacrylate, hydroxyethyl and methacrylic acid in water, and the solid content of the acrylic resin is 45-50%.
Further provides a preparation method of the PVC water-based primer, which comprises the following steps:
s1, mixing and stirring the emulsifier, butyl acrylate, methyl methacrylate, hydroxyethyl ester and methacrylic acid in proportion, wherein the stirring speed is 120rpm, and adjusting the pH value to 8-9 by using sodium bicarbonate to obtain pre-emulsion;
s2, adding pure water into the pre-emulsion, stirring, and dropwise adding the pre-emulsion into the reaction kettle for 5-6 hours;
s3, dissolving the initiator by using pure water to obtain an initiating solution;
s4, dropwise adding the priming solution into the reaction kettle for 10min, and stirring for 30 min;
s5, uniformly mixing the to-be-initiated liquid and the pre-emulsion, adding the defoaming agent, the wetting agent, the latex and the isopropanol, stirring, continuing to add the defoaming agent and the anti-aging agent after stirring for 2 hours, and continuing to stir to obtain the primer.
The invention has the beneficial effects that: butyl acrylate, methyl methacrylate, hydroxyethyl, methacrylic acid, an initiator and an emulsifier are subjected to emulsion polymerization reaction in water to form stable acrylic resin emulsion, so that the adhesive force of the primer to the PVC base material is improved; meanwhile, methyl methacrylate is a hard monomer, so that the tensile strength, the polymer cohesion and the heat resistance of the acrylic resin are improved through the hard monomer; the adhesion force of the primer and the PVC substrate is further improved by mutually crosslinking the latex and the acrylic resin.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The PVC water-based primer comprises latex and acrylic resin which is mutually crosslinked with the latex, wherein the acrylic resin is formed by emulsion polymerization of butyl acrylate, methyl methacrylate, hydroxyethyl and methacrylic acid in water, and the solid content of the acrylic resin is 45-50%.
Wherein, butyl acrylate, methyl methacrylate, hydroxyethyl, methacrylic acid, initiator and emulsifier are subjected to emulsion polymerization reaction in water to form stable acrylic resin emulsion, thereby improving the adhesive force of the primer to the PVC base material.
Methyl methacrylate, as one of the hard monomers, is copolymerized with other monomers to effectively increase the hardness and tensile strength of the copolymer resin, and at the same time, to increase the cohesion of the polymer and the heat resistance of the primer.
The latex and the acrylic resin are mutually crosslinked, so that the adhesion of the primer to the PVC base material and the viscose surface layer is further improved through the latex.
Specifically, the PVC water-based primer comprises latex, butyl acrylate, methyl methacrylate, hydroxyethyl ester, isopropanol, sodium bicarbonate, an emulsifier, a wetting agent, an anti-aging agent, methacrylic acid, a defoaming agent, an initiator and water.
Further, the PVC water-based primer comprises the following components in percentage by weight:
35-45% of latex, 30-35% of water, 5-15% of butyl acrylate, 5-15% of methyl methacrylate, 1-4% of hydroxyethyl ester, 4-6% of isopropanol, 0.5-0.7% of sodium bicarbonate, 0.4-0.6% of emulsifier, 1-2% of wetting agent, 0.2-0.3% of anti-aging agent, 0.1-0.4% of methacrylic acid, 0.1-0.2% of defoaming agent and 0.1-0.2% of initiator.
Preferably, the PVC water-based primer consists of the following components in percentage by weight:
37% of latex, 33% of water, 10% of butyl acrylate, 9% of methyl methacrylate, 3.2% of hydroxyethyl ester, 5% of isopropanol, 0.6% of sodium bicarbonate, 0.5% of emulsifier, 1% of wetting agent, 0.25% of anti-aging agent, 0.2% of methacrylic acid, 0.15% of defoaming agent and 0.1% of initiator.
Wherein the emulsifier is at least one selected from anionic emulsifier and nonionic emulsifier.
Preferably, the emulsifier is sodium dodecyl sulfate.
Specifically, the preparation method of the PVC water-based primer comprises the following steps:
s1, mixing and stirring the emulsifier, butyl acrylate, methyl methacrylate, hydroxyethyl ester and methacrylic acid in proportion, wherein the stirring speed is 120rpm, and adjusting the pH value to 8-9 by using sodium bicarbonate to obtain a pre-emulsion;
s2, adding pure water into the pre-emulsion, stirring, and dropwise adding the pre-emulsion into the reaction kettle for 5-6 hours;
s3, dissolving the initiator by using pure water to obtain an initiating solution;
s4, dropwise adding the priming solution into the reaction kettle for 10min, and stirring for 30 min;
s5, uniformly mixing the to-be-initiated liquid and the pre-emulsion, adding the defoaming agent, the wetting agent, the latex and the isopropanol, stirring, continuing to add the defoaming agent and the anti-aging agent after stirring for 2 hours, and continuing to stir to obtain the primer.
Further, the mass ratio of the amount of the pure water added in S2 to the amount of the pure water added in S3 was 95: 5.
Preferably, in S5, the addition amounts of the antifoaming agent added for the first time and the antifoaming agent added for the second time are 0.067wt% and 0.122wt%, respectively.
Further, the temperature of the reaction kettle is 90-94 ℃, and the preferable temperature is 91 ℃.
Preferably, the primer prepared by the preparation method of the PVC water-based primer has an acrylic resin solid content of 46%.
Example 1
The PVC water-based primer is prepared from the following components in percentage by weight:
37% of latex E20, 33% of water, 10% of butyl acrylate, 9% of methyl methacrylate, 3.2% of hydroxyethyl ester, 5% of isopropanol, 0.6% of sodium bicarbonate, 0.5% of emulsifier ER-10, 1% of wetting agent WE3321, 0.211% of antioxidant 1005, 0.2% of methacrylic acid, 0.189% of defoamer 810 and 0.1% of sodium persulfate.
The preparation method of the PVC water-based primer comprises the following steps:
s1, mixing and stirring 0.5kg of emulsifier ER-10, 10kg of butyl acrylate, 9kg of methyl methacrylate, 3.2kg of hydroxyethyl ester and 0.2kg of methacrylic acid at the stirring speed of 120rpm, and adjusting the pH value to 8 by using sodium bicarbonate to obtain a pre-emulsion;
s2, adding 31.35kg of pure water into the pre-emulsion, stirring, dropwise adding the pre-emulsion into a reaction kettle for 5 hours, and controlling the temperature of the reaction kettle at 91 ℃;
s3, dissolving 0.1kg of sodium persulfate by using 1.65kg of pure water to obtain a priming solution;
s4, dropwise adding the priming solution into the reaction kettle for 10min, and stirring for 30 min;
s5, uniformly mixing the liquid to be initiated with the pre-emulsion, adding 0.067kg of defoaming agent 810, 1kg of wetting agent, 37kg of latex and 5kg of isopropanol, stirring, continuously adding 0.122kg of defoaming agent 810 and 0.211kg of anti-aging agent 1005 after stirring for 2 hours, and continuously stirring until the mixture is uniformly stirred to obtain a primer;
the primer prepared by the preparation method of the PVC water-based primer has the acrylic resin solid content of 46%.
Example 2
PVC water primer, which is different from the primer in the embodiment 1: the PVC water-based primer is prepared from the following components in percentage by weight:
45% of latex E20, 35% of water, 5% of butyl acrylate, 5% of methyl methacrylate, 1% of hydroxyethyl ester, 5.1% of isopropanol, 0.7% of sodium bicarbonate, 0.4% of emulsifier ER-10, 2% of wetting agent WE3321, 0.3% of antioxidant 1005, 0.1% of methacrylic acid, 0.2% of defoamer 810 and 0.2% of sodium persulfate, the acrylic resin solids content being 45%.
Example 3
PVC water primer, which is different from the primer in the embodiment 1: the PVC water-based primer is prepared from the following components in percentage by weight:
35% of latex E20, 30% of water, 11.5% of butyl acrylate, 11.4% of methyl methacrylate, 4% of hydroxyethyl ester, 4% of isopropanol, 0.5% of sodium bicarbonate, 0.6% of emulsifier ER-10, 2% of wetting agent WE3321, 0.2% of antioxidant 1005, 0.4% of methacrylic acid, 0.2% of defoamer 810 and 0.2% of sodium persulfate, the acrylic resin solids content being 50%.
Comparative example 1
PVC water primer, which is different from the primer in the embodiment 1: natural rubber RSS3 was used instead of latex E20.
Comparative example 2
PVC water-borne primer, which is different from the primer in the embodiment 1 in that: the acrylic resin solids content of the primer was 55%.
Test example 1
The primer prepared in examples 1-3 and comparative examples 1-2 and 3M N-200 were respectively coated on the surface of a PVC substrate, the thickness was 2 μm, and an adhesive surface layer was continuously coated on the surface of the primer, the adhesive surface layer was selected from 502 adhesive, the thickness was 12 μm, two groups of the same experimental tapes were prepared, two groups of the same experimental tapes were bonded together in an environment of 25 ℃, and then immediately peeled off from each other, and the separation between the adhesive surface layer and the primer on the tape was tested in 10 times, 20 times, and 30 times, respectively, and the separation was regarded as unqualified, and the separation was regarded as qualified, and the test results are shown in table 1:
TABLE 1
| Item | Within 10 times | Within 20 times | Within 30 times |
| Example 1 | Qualified | Qualified | Qualified |
| Example 2 | Qualified | Qualified | Qualified |
| Example 3 | Qualified | Qualified | Qualified |
| Comparative example 1 | Qualified | Fail to be qualified | Fail to be qualified |
| Comparative example 2 | Qualified | Fail to be qualified | Fail to be qualified |
| 3M N-200 | Qualified | Qualified | Qualified |
As can be seen from Table 1, the primer and the adhesive surface layer are separated from each other in 20 times in the comparative example 1 and the comparative example 2, and the examples 1 to 3 and 3M N to 200 show good connectivity in 30 peeling experiments.
Detection example 2
The difference from test example 1 is that the test tapes are all placed in an oven at 150 ℃ for heating for 10min before testing at 25 ℃, and the test results are shown in table 2:
TABLE 2
As can be seen from Table 2, the adhesion promotion effect of the coating agent in examples 1 to 3 is not lost at high temperature, while the adhesion promotion effect of 3M N-200 is lost within 20 times, and the adhesive surface layer and the primer layer are mutually separated.
In conclusion, according to the PVC water-based primer and the preparation method thereof provided by the invention, butyl acrylate, methyl methacrylate, hydroxyethyl ester, methacrylic acid, an initiator and an emulsifier are subjected to emulsion polymerization reaction in water to form a stable acrylic resin emulsion, so that the adhesive force of the primer to a PVC base material is improved; meanwhile, methyl methacrylate is a hard monomer, so that the tensile strength, the polymer cohesion and the heat resistance of the acrylic resin are improved through the hard monomer; the adhesion between the primer and the PVC base material is further improved by mutually crosslinking the latex and the acrylic resin.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (7)
- The PVC water-based primer is characterized by comprising latex and acrylic resin which is crosslinked with the latex, wherein the acrylic resin is formed by polymerizing butyl acrylate, methyl methacrylate, hydroxyethyl and methacrylic acid in water in an emulsion manner, and the solid content of the acrylic resin is 45-50%;the PVC water-based primer consists of the following components in percentage by weight:35-45% of latex, 30-35% of water, 5-15% of butyl acrylate, 5-15% of methyl methacrylate, 1-4% of hydroxyethyl ester, 4-6% of isopropanol, 0.5-0.7% of sodium bicarbonate, 0.4-0.6% of emulsifier, 1-2% of wetting agent, 0.2-0.3% of anti-aging agent, 0.1-0.4% of methacrylic acid, 0.1-0.2% of defoaming agent and 0.1-0.2% of initiator;the latex was latex E20.
- 2. The PVC waterborne primer according to claim 1, which is characterized by comprising the following components in percentage by weight:37% of latex, 33% of water, 10% of butyl acrylate, 9% of methyl methacrylate, 3.2% of hydroxyethyl ester, 5% of isopropanol, 0.6% of sodium bicarbonate, 0.5% of emulsifier, 1% of wetting agent, 0.25% of anti-aging agent, 0.2% of methacrylic acid, 0.15% of defoaming agent and 0.1% of initiator.
- 3. The PVC waterborne primer according to claim 1, wherein the emulsifier is at least one selected from the group consisting of anionic emulsifiers and nonionic emulsifiers.
- 4. The preparation method of the PVC water-based primer according to any one of claims 1 to 3, characterized by comprising the following steps:s1, mixing and stirring the emulsifier, butyl acrylate, methyl methacrylate, hydroxyethyl ester and methacrylic acid in proportion, wherein the stirring speed is 120rpm, and adjusting the pH value to 8-9 by using sodium bicarbonate to obtain a pre-emulsion;s2, adding pure water into the pre-emulsion, stirring, and dropwise adding the pre-emulsion into the reaction kettle for 5-6 hours;s3, dissolving the initiator by using pure water to obtain an initiating solution;s4, dropwise adding the priming solution into the reaction kettle for 10min, and stirring for 30 min;s5, uniformly mixing the to-be-initiated liquid and the pre-emulsion, adding the defoaming agent, the wetting agent, the latex and the isopropanol, stirring, continuing to add the defoaming agent and the anti-aging agent after stirring for 2 hours, and continuing to stir to obtain the primer.
- 5. The method for producing a PVC water-based primer according to claim 4, wherein the mass ratio of the amount of the pure water added in S2 to the amount of the pure water added in S3 is 95: 5.
- 6. The method for preparing the PVC water primer according to claim 4, wherein the addition amounts of the defoaming agent added for the first time and the defoaming agent added for the second time in S5 are 0.067wt% and 0.122wt%, respectively.
- 7. The preparation method of the PVC waterborne primer according to claim 4, wherein the temperature of the reaction kettle is 90-94 ℃.
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| CN101974299B (en) * | 2010-10-11 | 2012-07-04 | 新丰杰力电工材料有限公司 | High temperature-resistant polyacrylate pressure-sensitive adhesive emulsion and preparation method and application thereof |
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