CN113321777A - Epoxy graft modified water-based acrylic resin and preparation method thereof - Google Patents
Epoxy graft modified water-based acrylic resin and preparation method thereof Download PDFInfo
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- CN113321777A CN113321777A CN202110573424.7A CN202110573424A CN113321777A CN 113321777 A CN113321777 A CN 113321777A CN 202110573424 A CN202110573424 A CN 202110573424A CN 113321777 A CN113321777 A CN 113321777A
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- 239000004925 Acrylic resin Substances 0.000 title claims abstract description 52
- 229920000178 Acrylic resin Polymers 0.000 title claims abstract description 52
- 239000004593 Epoxy Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 16
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims abstract description 97
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims abstract description 42
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000178 monomer Substances 0.000 claims abstract description 39
- 239000003822 epoxy resin Substances 0.000 claims abstract description 38
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 38
- 239000003999 initiator Substances 0.000 claims abstract description 30
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 21
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 21
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011259 mixed solution Substances 0.000 claims abstract description 19
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000010992 reflux Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical group CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 39
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 21
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 21
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 21
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 239000003973 paint Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- -1 acrylic ester Chemical class 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920006313 waterborne resin Polymers 0.000 description 2
- 239000013035 waterborne resin Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
Classifications
-
- 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
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Epoxy Resins (AREA)
- Graft Or Block Polymers (AREA)
Abstract
The invention discloses an epoxy graft modified water-based acrylic resin and a preparation method thereof, wherein the epoxy graft modified water-based acrylic resin comprises the following steps: comprises 5-9 parts of ethyl acrylate, 10-14 parts of methyl methacrylate, 10-15 parts of butyl methacrylate, 15-20 parts of styrene, 4-6 parts of methacrylic acid, 0.5-0.7 part of first initiator, 0.1-0.4 part of second initiator, 25-30 parts of n-butyl alcohol, 8-15 parts of epoxy resin and 6-8 parts of neutralizer. Preparation: (1) mixing ethyl acrylate, methyl methacrylate, butyl methacrylate, styrene, methacrylic acid, a first initiator, a second initiator and part of n-butyl alcohol to form a mixed monomer; (2) mixing the epoxy resin with the residual n-butanol, and heating and dissolving to obtain a mixed solution; (3) adding part of mixed monomers into the mixed solution, and heating to reflux; when a small amount of monomer is polymerized, adding the residual mixed monomer for polymerization reaction; (4) and after the polymerization reaction, cooling, and adding a neutralizing agent to adjust the pH value of the system to obtain the epoxy graft modified waterborne acrylic resin.
Description
Technical Field
The invention relates to the technical field of chemical coatings, and particularly relates to an epoxy graft modified water-based acrylic resin and a preparation method thereof.
Background
The existing epoxy resin for paint is mostly solvent type, a large amount of organic solvent is needed to be added in the preparation and use processes, the epoxy resin has the serious defect of environmental pollution caused by volatilization of the organic solvent, and the epoxy resin has high cost and is not easy to store. With the gradual shrinkage of the solvent-based market which is the enhancement of environmental awareness of people, the water-based market enters a rapid development period, but the performance of general water-based products can hardly meet the actual production requirements, for example, the water-based acrylic resin has the problems of poor water resistance, weak mechanical strength and insufficient adhesive force.
Aiming at the problems, the invention designs the epoxy modified waterborne acrylic resin, which not only makes up the defects of waterborne acrylic, but also embodies the performance of epoxy resin.
Disclosure of Invention
The invention aims to provide an epoxy graft modified waterborne acrylic resin and a preparation method thereof; the invention adopts the epoxy grafted modified acrylic resin to improve the mechanical property of the obtained resin, combines the advantages of the acrylic resin and the epoxy resin, has the requirement of environmental protection and has wide market prospect.
The invention is realized by the following technical scheme:
the epoxy graft modified waterborne acrylic resin is characterized by comprising the following components in parts by weight: 5-9 parts of ethyl acrylate, 10-14 parts of methyl methacrylate, 10-15 parts of butyl methacrylate, 15-20 parts of styrene, 4-6 parts of methacrylic acid, 0.5-0.7 part of first initiator, 0.1-0.4 part of second initiator, 25-30 parts of n-butyl alcohol, 8-15 parts of epoxy resin and 6-8 parts of neutralizer. The epoxy graft modified waterborne acrylic resin provided by the invention adopts the epoxy graft modified acrylic resin to improve the mechanical property of the obtained resin material, combines the advantages of the acrylic resin and the epoxy resin, and has the environmental protection requirement and wide market prospect.
Further, the composition comprises the following components in parts by weight: 5 parts of ethyl acrylate, 11 parts of methyl methacrylate, 10 parts of butyl methacrylate, 15 parts of styrene, 4 parts of methacrylic acid, 0.7 part of first initiator, 0.3 part of second initiator, 30 parts of n-butyl alcohol, 10 parts of epoxy resin and 6 parts of neutralizer.
Further, the first initiator is Benzoyl Peroxide (BPO).
Further, the second initiator is dicumyl peroxide (DCP).
Further, the epoxy resin is E-44 epoxy resin.
Further, the neutralizing agent is triethylamine.
The preparation method of the epoxy graft modified waterborne acrylic resin is characterized by comprising the following steps:
(1) uniformly mixing 5-9 parts of ethyl acrylate, 10-14 parts of methyl methacrylate, 10-15 parts of butyl methacrylate, 15-20 parts of styrene, 4-6 parts of methacrylic acid, 0.5-0.7 part of first initiator, 0.1-0.4 part of second initiator and part of n-butyl alcohol to form a mixed monomer;
(2) mixing 8-15 parts of epoxy resin with the rest n-butanol, and heating and stirring until the epoxy resin is dissolved to obtain a mixed solution; specifically, 8-15 parts of epoxy resin and the rest of n-butanol are mixed in a four-neck flask provided with a stirrer, a condenser tube, a thermometer and a dropping funnel, and are heated and stirred until dissolved to obtain a mixed solution;
(3) adding part of the mixed monomer into the mixed solution, and heating to reflux temperature; when a small amount of monomer is polymerized, adding the rest mixed monomer for polymerization reaction;
(4) after polymerization, cooling, and then adding 6-8 parts of neutralizing agent to adjust the pH value of the system to obtain the epoxy graft modified waterborne acrylic resin. The epoxy graft modified waterborne acrylic resin is synthesized into the waterborne resin with good water resistance, high hardness, high adhesive force and impact resistance by the technical scheme of using low molecular weight epoxy graft modified waterborne acrylic ester and the corresponding synthesis process.
Further, in the step (1), the ethyl acrylate, the methyl methacrylate, the butyl methacrylate, the styrene, the methacrylic acid, the first initiator, the second initiator and 60-80% of n-butanol are mixed and stirred uniformly to form a mixed monomer. Specifically, the n-butanol is used as a solvent; in the step (1), 60-80% of total n-butanol is used for dissolving the monomers, and the rest 20-30% of n-butanol is used for mixing with the epoxy resin in the next step.
Further, in the step (3), one third of the mixed monomer is added into the mixed solution, and the temperature is raised to 115-120 ℃ for reflux; when a small amount of monomer is polymerized, the residual mixed monomer is slowly dripped into the mixed solution within 2 to 3 hours to carry out polymerization reaction for 3 to 5 hours.
Further, after the polymerization reaction in the step (4), cooling to 40-50 ℃, and then adding the neutralizing agent to adjust the pH of the system to 7-8, so as to obtain the high-resistance epoxy graft modified waterborne acrylic resin.
The preparation method of the epoxy graft modified waterborne acrylic resin comprises the steps of uniformly mixing styrene, methyl methacrylate, butyl methacrylate, methacrylic acid, n-butyl alcohol, Benzoyl Peroxide (BPO) and dicumyl peroxide (DCP); adding epoxy resin and n-butanol into a four-neck flask provided with a stirrer, a condenser pipe, a thermometer and a dropping funnel, heating and stirring until the epoxy resin and the n-butanol are dissolved, adding 1/3 mixed monomer, heating to a reflux temperature, slowly dropping the rest mixed monomer when a small amount of monomer is polymerized, and finishing dropping about 2-3 hours; and then keeping the temperature of 115 ℃ and 120 ℃ for 3-5 hours, completely polymerizing, cooling to 40-50 ℃, adding triethylamine for neutralization, adjusting the pH value of the system to be about 7-8, and discharging to obtain the epoxy graft modified waterborne acrylic resin.
The invention has the beneficial effects that:
(1) the epoxy graft modified waterborne acrylic resin is synthesized into the waterborne resin with good water resistance, high hardness, high adhesive force and impact resistance by the technical scheme of using low molecular weight epoxy graft modified waterborne acrylic ester and the corresponding synthesis process.
(2) The epoxy graft modified waterborne acrylic resin disclosed by the invention improves the mechanical property of the obtained resin material by adopting the epoxy graft modified acrylic resin, has the advantages of both the acrylic resin and the epoxy resin, and has the environmental protection requirement and wide market prospect.
(3) The preparation method of the epoxy graft modified waterborne acrylic resin determines a synthesis process, selects E-44 epoxy resin, adds the epoxy resin and a solvent (n-butanol) together in the early stage of reaction, controls the reaction temperature at 115-120 ℃, and prepares the resin with excellent mechanical property and stability.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An epoxy graft modified waterborne acrylic resin comprises the following components in parts by weight: 5 parts of ethyl acrylate, 11 parts of methyl methacrylate, 10 parts of butyl methacrylate, 15 parts of styrene, 4 parts of methacrylic acid, 0.7 part of Benzoyl Peroxide (BPO), 0.3 part of dicumyl peroxide (DCP), 30 parts of n-butyl alcohol, 10 parts of E-44 epoxy resin and 6 parts of triethylamine (neutralizer).
The preparation method of the epoxy graft modified waterborne acrylic resin described in the embodiment 1 comprises the steps of firstly preparing a four-neck flask, and matching with a stirrer, a condenser tube, a thermometer and a dropping funnel, wherein the interior of the flask is clean and has no impurities; preparing the required raw material components comprising: 5 parts of ethyl acrylate, 11 parts of methyl methacrylate, 10 parts of butyl methacrylate, 15 parts of styrene, 4 parts of methacrylic acid, 0.7 part of Benzoyl Peroxide (BPO), 0.3 part of dicumyl peroxide (DCP), 30 parts of n-butyl alcohol, 10 parts of E-44 epoxy resin and 6 parts of triethylamine; the preparation process comprises the following steps:
(1) uniformly mixing 5 parts of ethyl acrylate, 11 parts of methyl methacrylate, 10 parts of butyl methacrylate, 15 parts of styrene, 4 parts of methacrylic acid, 0.7 part of benzoyl peroxide (a first initiator), 0.3 part of dicumyl peroxide (a second initiator) and 70% of n-butyl alcohol (equivalent to 21 parts of n-butyl alcohol) to form a mixed monomer;
(2) mixing 10 parts of E-44 epoxy resin and the rest 9 parts of n-butanol in a four-neck flask provided with a stirrer, a condenser tube, a thermometer and a dropping funnel, and heating and stirring until the mixture is dissolved to obtain a mixed solution;
(3) adding 1/3 mixed monomer into the mixed solution, heating to 115 ℃ and refluxing; when a small amount of monomer is polymerized, slowly dripping the residual 2/3 mixed monomer into the mixed solution for about 2.5 hours, and maintaining the polymerization reaction at 115 ℃ for 3.5 hours;
(4) after the polymerization reaction, cooling to 40 ℃, and then adding triethylamine to adjust the pH value of the system to 7, thereby obtaining the epoxy grafted modified waterborne acrylic resin.
Example 2
An epoxy graft modified waterborne acrylic resin comprises the following components in parts by weight: 7 parts of ethyl acrylate, 14 parts of methyl methacrylate, 12 parts of butyl methacrylate, 16 parts of styrene, 5 parts of methacrylic acid, 0.5 part of Benzoyl Peroxide (BPO), 0.4 part of dicumyl peroxide (DCP), 25 parts of n-butanol, 15 parts of E-44 epoxy resin and 7 parts of triethylamine (neutralizer).
The preparation method of the epoxy graft modified waterborne acrylic resin in the embodiment 2 comprises the steps of firstly preparing a four-mouth flask, and matching with a stirrer, a condenser tube, a thermometer and a dropping funnel, wherein the interior of the flask is clean and has no impurities; preparing the required raw material components comprising: 7 parts of ethyl acrylate, 14 parts of methyl methacrylate, 12 parts of butyl methacrylate, 16 parts of styrene, 5 parts of methacrylic acid, 0.5 part of Benzoyl Peroxide (BPO), 0.4 part of dicumyl peroxide (DCP), 25 parts of n-butanol, 15 parts of E-44 epoxy resin and 7 parts of triethylamine; the preparation process comprises the following steps:
(1) uniformly mixing 7 parts of ethyl acrylate, 14 parts of methyl methacrylate, 12 parts of butyl methacrylate, 16 parts of styrene, 5 parts of methacrylic acid, 0.5 part of benzoyl peroxide (a first initiator), 0.4 part of dicumyl peroxide (a second initiator) and 60% of n-butyl alcohol (which is equal to 15 parts of n-butyl alcohol) to form a mixed monomer;
(2) mixing 15 parts of E-44 epoxy resin and the rest 10 parts of n-butanol in a four-neck flask provided with a stirrer, a condenser tube, a thermometer and a dropping funnel, and heating and stirring until the mixture is dissolved to obtain a mixed solution;
(3) adding 1/3 mixed monomer into the mixed solution, heating to 120 ℃ and refluxing; when a small amount of monomer is polymerized, slowly dripping the residual 2/3 mixed monomer into the mixed solution for about 2 hours, and maintaining the polymerization reaction at 120 ℃ for 3 hours;
(4) after the polymerization reaction, cooling to 50 ℃, and then adding triethylamine to adjust the pH value of the system to 8, thereby obtaining the epoxy grafted modified waterborne acrylic resin.
Example 3
An epoxy graft modified waterborne acrylic resin comprises the following components in parts by weight: 9 parts of ethyl acrylate, 10 parts of methyl methacrylate, 15 parts of butyl methacrylate, 20 parts of styrene, 6 parts of methacrylic acid, 0.6 part of Benzoyl Peroxide (BPO), 0.1 part of dicumyl peroxide (DCP), 30 parts of n-butyl alcohol, 8 parts of E-44 epoxy resin and 8 parts of triethylamine (neutralizer).
The preparation method of the epoxy graft modified waterborne acrylic resin in the embodiment 3 comprises the steps of firstly preparing a four-neck flask, and matching with a stirrer, a condenser tube, a thermometer and a dropping funnel, wherein the interior of the flask is clean and has no impurities; preparing the required raw material components comprising: 9 parts of ethyl acrylate, 10 parts of methyl methacrylate, 15 parts of butyl methacrylate, 20 parts of styrene, 6 parts of methacrylic acid, 0.6 part of Benzoyl Peroxide (BPO), 0.1 part of dicumyl peroxide (DCP), 30 parts of n-butanol, 8 parts of E-44 epoxy resin and 8 parts of triethylamine; the preparation process comprises the following steps:
(1) uniformly mixing 9 parts of ethyl acrylate, 10 parts of methyl methacrylate, 15 parts of butyl methacrylate, 20 parts of styrene, 6 parts of methacrylic acid, 0.6 part of benzoyl peroxide (a first initiator), 0.1 part of dicumyl peroxide (a second initiator) and 80% of n-butyl alcohol (equivalent to 24 parts of n-butyl alcohol) to form a mixed monomer;
(2) mixing 8 parts of E-44 epoxy resin and the rest 6 parts of n-butanol in a four-neck flask provided with a stirrer, a condenser tube, a thermometer and a dropping funnel, and heating and stirring until the mixture is dissolved to obtain a mixed solution;
(3) adding 1/3 mixed monomer into the mixed solution, heating to 115 ℃ and refluxing; when a small amount of monomer is polymerized, slowly dripping the residual 2/3 mixed monomer into the mixed solution for about 3 hours, and maintaining the polymerization reaction at 115 ℃ for 5 hours;
(4) after the polymerization reaction, cooling to 40 ℃, and then adding triethylamine to adjust the pH value of the system to 7, thereby obtaining the epoxy grafted modified waterborne acrylic resin.
The process of the invention comprises the steps of firstly, uniformly mixing styrene, methyl methacrylate, butyl methacrylate, methacrylic acid, n-butanol, benzoyl peroxide and dicumyl peroxide; adding epoxy resin and n-butyl alcohol into a four-neck flask provided with a stirrer, a condenser pipe, a thermometer and a dropping funnel, heating and stirring until the epoxy resin and the n-butyl alcohol are dissolved, adding 1/3 mixed monomer, heating to a reflux temperature, slowly dropwise adding the rest mixed monomer for polymerization reaction when a small amount of monomer is polymerized, cooling after the reaction, and adding triethylamine for neutralization to prepare the epoxy graft modified waterborne acrylic resin with good water resistance, high hardness, high adhesive force and impact resistance; the prepared resin has excellent mechanical properties, has the advantages of both acrylic resin and epoxy resin, meets the requirement of environmental protection, and has wide market prospect.
And (3) performance testing:
the epoxy graft modified waterborne acrylic resin obtained in the above examples 1 to 3 was subjected to tests of butanone-rub resistance, water resistance, adhesion, hardness and flexibility, and the specific test procedures were as follows: firstly, respectively coating the resins prepared in the embodiments 1 to 3 on tinplate, and then baking to form a paint film; butanone-resistant wiping: dipping a butanone reagent by using gauze, and wiping a paint film; and (3) testing water resistance: namely, soaking the paint film in water; and (3) testing the adhesive force: sliding a blade for hundreds of grids, and then sticking the adhesive tape to see the falling degree of the paint film; and (3) hardness testing: using pencils with different hardness to scratch the paint film, and if the paint film is scratched, scratching the paint film; flexibility test: the bent membrane sheet showed no cracking at the bend, and the results are shown in table 1 below:
table 1 shows the results of the tests on the epoxy-grafted modified waterborne acrylic resins of examples 1 to 3
The flexibility can indirectly show that the epoxy graft modified waterborne acrylic resin has good impact resistance, and tests in Table 1 show that the epoxy graft modified waterborne acrylic resin prepared by the invention has good water resistance, high hardness, high adhesive force, good impact resistance and excellent mechanical properties.
The above-mentioned preferred embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention. Obvious variations or modifications of the present invention are within the scope of the present invention.
Claims (10)
1. The epoxy graft modified waterborne acrylic resin is characterized by comprising the following components in parts by weight: 5-9 parts of ethyl acrylate, 10-14 parts of methyl methacrylate, 10-15 parts of butyl methacrylate, 15-20 parts of styrene, 4-6 parts of methacrylic acid, 0.5-0.7 part of first initiator, 0.1-0.4 part of second initiator, 25-30 parts of n-butyl alcohol, 8-15 parts of epoxy resin and 6-8 parts of neutralizer.
2. The epoxy graft modified waterborne acrylic resin of claim 1, which comprises the following components in parts by weight: 5 parts of ethyl acrylate, 11 parts of methyl methacrylate, 10 parts of butyl methacrylate, 15 parts of styrene, 4 parts of methacrylic acid, 0.7 part of first initiator, 0.3 part of second initiator, 30 parts of n-butyl alcohol, 10 parts of epoxy resin and 6 parts of neutralizer.
3. The epoxy graft modified waterborne acrylic resin of claim 1 or 2, wherein the first initiator is benzoyl peroxide.
4. The epoxy graft modified waterborne acrylic resin of claim 1 or 2, wherein the second initiator is dicumyl peroxide.
5. The epoxy graft modified waterborne acrylic resin of claim 1 or 2, wherein the epoxy resin is an E-44 epoxy resin.
6. The epoxy graft modified waterborne acrylic resin of claim 1 or 2, wherein the neutralizing agent is triethylamine.
7. The method for preparing the epoxy graft modified waterborne acrylic resin as claimed in any one of claims 1 to 6, wherein the method comprises the following steps:
(1) uniformly mixing the ethyl acrylate, the methyl methacrylate, the butyl methacrylate, the styrene, the methacrylic acid, the first initiator, the second initiator and part of the n-butanol to form a mixed monomer;
(2) mixing the epoxy resin with the rest n-butanol, and heating to dissolve to obtain a mixed solution;
(3) adding part of the mixed monomer into the mixed solution, and heating to reflux; when a small amount of monomer is polymerized, adding the rest mixed monomer for polymerization reaction;
(4) and after the polymerization reaction, cooling, and then adding the neutralizer to adjust the pH value of the system to obtain the epoxy graft modified waterborne acrylic resin.
8. The method for preparing the epoxy graft modified waterborne acrylic resin according to claim 7, wherein in the step (1), the ethyl acrylate, the methyl methacrylate, the butyl methacrylate, the styrene, the methacrylic acid, the first initiator, the second initiator and 60-80% of the n-butanol are mixed and stirred uniformly to form a mixed monomer.
9. The method as claimed in claim 7, wherein one third of the mixed monomer is added into the mixture in step (3), and the mixture is heated to 115-120 ℃ for reflux; when a small amount of monomer is polymerized, the residual mixed monomer is slowly dripped into the mixed solution within 2 to 3 hours to carry out polymerization reaction for 3 to 5 hours.
10. The method for preparing epoxy graft modification waterborne acrylic resin according to claim 9, wherein the epoxy graft modification waterborne acrylic resin is obtained by cooling to 40-50 ℃ after the polymerization reaction in the step (4), and then adding the neutralizing agent to adjust the pH of the system to 7-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110573424.7A CN113321777A (en) | 2021-05-25 | 2021-05-25 | Epoxy graft modified water-based acrylic resin and preparation method thereof |
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| CN202110573424.7A CN113321777A (en) | 2021-05-25 | 2021-05-25 | Epoxy graft modified water-based acrylic resin and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116200073A (en) * | 2023-03-10 | 2023-06-02 | 广州市哲铭油墨涂料有限公司 | Water-based ink with quick-drying function and preparation method thereof |
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2021
- 2021-05-25 CN CN202110573424.7A patent/CN113321777A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116200073A (en) * | 2023-03-10 | 2023-06-02 | 广州市哲铭油墨涂料有限公司 | Water-based ink with quick-drying function and preparation method thereof |
| CN116200073B (en) * | 2023-03-10 | 2023-10-13 | 广州市哲铭油墨涂料有限公司 | Water-based ink with quick-drying function and preparation method thereof |
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