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High-acid-value carboxyl acrylic acid matting resin and epoxy polyester type powder coating containing same

A high acid value carboxylic acrylic acid and carboxylic acrylic acid technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., to achieve the effects of increased impact strength, low cost, and low coating gloss

Active Publication Date: 2018-11-02
武汉荣邦华泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the matting application of existing pure epoxy and epoxy polyester powder coatings in low-gloss and light-colored systems and to expand and strengthen the promotion and application of carboxylic acrylic resins in the field of powder coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the high carboxyl group content acrylic acid matting resin of the present embodiment: add 1000ml toluene in the 3000ml four-necked flask with stirring, thermometer and reflux device, drop tank, 280 grams of acrylic acid, 180 grams of styrene, 130 grams of ethyl acrylate Esters, 100 g n-butyl acrylate, 180 g methyl methacrylate, 30 g isooctyl acrylate, 100 g cycloaliphatic acrylate NCA, 50 g (BPO) benzoyl peroxide initiator, 3 g dodecyl Alkyl mercaptan is completely dissolved, put into the dropping funnel, heat the toluene to 110 degrees, keep reflux and start to drop, control the reaction temperature between 110-150, drop it in 2 hours, continue to keep warm for 1.5 hours, The solvent is removed in vacuo to give a white or light yellow transparent solid resin. number 1. The measured acidity is 216.2, the molecular weight is 4500-4800, and the glass transition temperature is 52.8°C.

Embodiment 2

[0039] The preparation method of the high carboxyl acrylic acid matting resin of the present embodiment is as follows: add 1000ml toluene in the 3000ml four-necked flask with stirring, thermometer and reflux device, drop tank, mix 320 grams of acrylic acid, 180 grams of styrene, 60 grams of acrylic acid Ethyl esters, 120 g n-butyl acrylate, 80 g methyl acrylate, 120 g methyl methacrylate, 120 g cycloaliphatic acrylate NCA, 50 g (BPO) benzoyl peroxide initiator, 3 g dodecyl Alkyl mercaptan is completely dissolved, put into the dropping funnel, heat the toluene to 110 degrees, keep reflux and start to drop, control the reaction temperature between 110-150, drop it in 2 hours, continue to keep warm for 1.5 hours, The solvent is removed in vacuo to give a white or light yellow transparent solid resin. number 2. The measured acidity is 248.1, the molecular weight is 5100-5500, and the glass transition temperature is 61.2°C.

Embodiment 3

[0041] The preparation method of the high carboxyl acrylic acid matting resin of the present embodiment is as follows: with stirring, thermometer and reflux device, add 1000ml xylene in the 3000ml four-neck flask of dropping tank, add 250 grams of acrylic acid and 100 grams of methacrylic acid, 180 g styrene, 80 g ethyl acrylate, 120 g n-butyl acrylate, 100 g methyl acrylate, 170 g methyl methacrylate, 50 g (BPO) di-tert-butyl peroxide initiator, 2 g dodecane Base mercaptan makes it dissolve completely, puts into dropping funnel, heats up xylene and heats up to 140 degree, keeps reflux and starts to add dropwise, controls reaction temperature between 110-150°C, drops after 2 hours, and continues to insulate for 1.5 hours, The solvent is removed in vacuo to give a white or light yellow transparent solid resin. number 3. The measured acidity is 256.8, the molecular weight is 5500-5800, and the glass transition temperature is 54.2°C.

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Abstract

The invention discloses high-acid-value carboxyl acrylic acid matting resin and epoxy polyester type powder coating containing same. The high-acid-value carboxyl acrylic acid matting resin is preparedby co-polymerizing the following various monomers in percentage by weight: 28-35% of an acrylic acid functional monomer, 15-20% of styrene, 0-10% of methyl acrylate, 5-15% of ethyl acrylate, 5-15% ofn-butyl acrylate, 0-5% of ethylhexyl acrylate, 10-15% of any one or combination of alicyclic acrylate, isobornyl acrylate or isobornyl methacrylate, and 10-20% of methyl methacrylate, wherein the acrylic acid functional monomer is one or a mixture of two of acrylic acid or methacrylic acid.

Description

technical field [0001] The invention relates to the technical field of chemical raw material production, in particular to a high acid value carboxylic acrylic acid matting resin used for pure epoxy or epoxy polyester powder coatings, a preparation method thereof and epoxy polyester powder coatings containing the same. Background technique [0002] At present, the low-gloss matting used for pure epoxy and epoxy polyester powder coatings on the market is mainly B68 chemical matting agents containing cyclic amidines and physical matting agents containing glycidyl acrylate polymers. The former It is easy to yellow when baked at high temperature. It is not suitable for light-colored powders, and it cannot achieve low light for epoxy-polyester powders. In pure epoxy powders, the strength and bending are very poor. The latter contains acrylate polymers of glycidyl methacrylate. Powder coatings made of this type of matting agent are unstable in later storage, have poor temperature r...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F212/08C08F220/18C08F220/14C09D163/00C09D167/00C09D133/02C09D5/03
CPCC09D163/00C08F220/06C09D5/033C08L2201/08C08L2205/03C08K2003/3045C08K2003/2241C08L67/00C08L33/02C08K13/02C08K3/22C08K3/30C08F220/14C08F220/1808C08F220/1804C08F220/18C08F212/08C08F220/1802
Inventor 万里城
Owner 武汉荣邦华泰科技有限公司
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