Preparation method of waterborne acrylic resin with high heat resistance and product obtained by preparation method

A water-based acrylic, heat-resistant technology, applied in coatings, fire-resistant coatings, etc., can solve the problems of poor heat resistance, low hardness, anti-pigment exudation and anti-yellowing, etc., to achieve high heat resistance, good resistance The effect of thermal performance

Active Publication Date: 2018-03-23
广东立得新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of poor heat resistance, poor anti-pigment exudation and anti-yellowing properties, low hardness, and poor corrosion resistance of water-based acrylic resins in the prior art

Method used

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  • Preparation method of waterborne acrylic resin with high heat resistance and product obtained by preparation method
  • Preparation method of waterborne acrylic resin with high heat resistance and product obtained by preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, the preparation of a kind of water-based acrylic resin with high heat resistance

[0032] S1 Add 25 parts of dihydrazide carbonate to dimethyl sulfoxide and stir evenly, then add 4 parts of novolak epoxy resin for chain extension modification reaction, react at a temperature of 150°C for 15 minutes, distill under reduced pressure, and remove the solvent , to obtain modified hydrazide;

[0033] S2 Add 160 parts of dipropylene glycol methyl ether, 25 parts of α-methylstyrene, 18 parts of acrylic acid, 8 parts of butyl acrylate and 10 parts of methyl methacrylate into the reaction kettle, blow nitrogen, and stir at 100 rpm. Mix well and heat to 100°C;

[0034] S3 mixes 24 parts of maleic anhydride mixed solution with 3 parts of dicumyl peroxide, and stirs evenly. The maleic anhydride mixed solution is composed of maleic anhydride and styrene in a weight ratio of 1:1 to obtain a mixed solution;

[0035] S4 Add the mixed solution obtained in step S3 dropwise ...

Embodiment 2

[0038] Embodiment 2, the preparation of a kind of water-based acrylic resin with high heat resistance

[0039]S1 Add 28 parts of dihydrazide carbonate to dimethyl sulfoxide and stir evenly, then add 5 parts of novolac epoxy resin for chain extension modification reaction, react at a temperature of 155 °C for 18 minutes, distill under reduced pressure, and remove the solvent , to obtain modified hydrazide;

[0040] S2 Add 170 parts of dipropylene glycol methyl ether, 30 parts of α-methylstyrene, 20 parts of acrylic acid, 12 parts of butyl acrylate and 15 parts of methyl methacrylate into the reaction kettle, blow nitrogen, and stir at 150rpm. Mix well and heat to 120°C;

[0041] S3 mixes 28 parts of maleic anhydride mixed solution with 4 parts of dicumyl peroxide, and stirs evenly. The maleic anhydride mixed solution is composed of maleic anhydride and styrene in a weight ratio of 1:1 to obtain a mixed solution;

[0042] S4 Add the mixed solution obtained in step S3 dropwise ...

Embodiment 3

[0045] Embodiment 3, the preparation of a kind of water-based acrylic resin with high heat resistance

[0046] S1 Add 30 parts of dihydrazide carbonate to dimethyl sulfoxide and stir evenly, then add 5 parts of novolac epoxy resin for chain extension modification reaction, react at a temperature of 160°C for 20 minutes, distill under reduced pressure, and remove the solvent , to obtain modified hydrazide;

[0047] S2 Add 180 parts of dipropylene glycol methyl ether, 35 parts of α-methylstyrene, 25 parts of acrylic acid, 16 parts of butyl acrylate and 20 parts of methyl methacrylate into the reaction kettle, blow nitrogen, and stir at a speed of 200rpm. Mix well and heat to 130°C;

[0048] S3 mixes 30 parts of maleic anhydride mixed solution with 5 parts of dicumyl peroxide, and stirs evenly. The maleic anhydride mixed solution is composed of maleic anhydride and styrene in a weight ratio of 1:1 to obtain a mixed solution;

[0049] S4 Add the mixed solution obtained in step S...

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Abstract

The invention belongs to the field of chemical coatings and in particular relates to a preparation method of waterborne acrylic resin with high heat resistance. The preparation method of the waterborne acrylic resin with the high heat resistance, provided by the invention, comprises the following steps: carrying out chain extension reaction on dihydrazide carbonate by utilizing phenolic epoxy resin to obtain modified dihydrazide carbonate; then carrying out free radical polymerization to obtain waterborne acrylic resin with a main chain containing a maleic anhydride annular structure; adding the modified dihydrazide carbonate into the waterborne acrylic resin with the main chain containing the maleic anhydride annular structure and reacting to obtain the waterborne acrylic resin. The waterborne acrylic resin with the high heat resistance, which is prepared by the preparation method, has relatively high heat resistance; when the waterborne acrylic resin is applied to a coating, the rigidity, oil leakage resistance, pigment leakage resistance and yellow seepage resistance can be effectively improved; meanwhile, the waterborne acrylic resin also has the advantages of strong water resistance and corrosion resistance and is relatively ideal waterborne acrylic resin which is used for the coating and has high heat resistance.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and in particular relates to a preparation method of a water-based acrylic resin with high heat resistance and an obtained product. Background technique [0002] With the enhancement of social environmental awareness, the coatings with water-based acrylic resin as the main linking material are more and more widely used by people. At present, there are two ways to improve the heat resistance of this type of acrylic resin, one is to use vinyl monomers with imide side groups to copolymerize, and the other is to amidate the copolymerized maleic anhydride. kind of scheme. The former has no commercial promotion value due to its high cost, and the latter needs to form a certain amount of imide structure to show obvious heat resistance, which greatly limits the application range of this resin. [0003] Modern research has found that the copolymerization of different types of acrylic monomers can improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/12C08F220/06C08F220/18C08F220/14C08F222/08C08F212/08C09D125/16C09D7/65
CPCC08F212/12C08L2201/08C09D5/18C09D125/16C08L63/00C08F220/06C08F220/1804C08F220/14C08F222/08C08F212/08
Inventor 姚杰冲陈耀敬赵璐林广源张小团
Owner 广东立得新材料科技有限公司
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