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Method for preparing multifunctional acrylic matting resin

A technology of matting resin and acrylic acid, which is applied in coatings, powder coatings, etc., can solve the problems of poor mechanical strength, poor surface scratch resistance, and high cost, and achieve homopolymerization process improvement, increase mechanical strength and surface abrasion resistance performance, enhance the effect of inherent advantages

Inactive Publication Date: 2012-05-30
宁波维楷化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Weather-resistant powder coating matting agents and most of them use physical matting agents, such as matting powder, wax powder, stearate, etc. Most of them have poor matting effect, and it is not easy to obtain low-light weather-resistant powder coatings
British Casamid2228 is a matting curing agent of a catalyst mixture of polybasic acid and amine. It has poor heat resistance, tends to yellow, and affects the storage stability of the powder.
Domestically, the matting resin of glycidyl acrylate copolymer has strong matting properties, but there are also problems such as poor compatibility, poor mechanical strength, poor surface scratch resistance, easy to produce fine patterns when matting, and excessive dosage will cause costs. too high

Method used

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  • Method for preparing multifunctional acrylic matting resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 125g of glycidyl methacrylate, 200g of methyl methacrylate, 52g of butyl acrylate, 20g of styrene, 7.94g of azobisethylbutyronitrile, and 3.97g of α-methylstyrene forming dimer in advance , then premix 3.97g of benzoyl peroxide and 79.4g of xylene, add 397g of xylene into a 1000ml four-necked reaction glass bottle and heat it to 110°C, slowly drop the above two components into In the four-necked reaction glass bottle, the dropwise addition time is 1.5 hours, and after the dropwise addition is completed, the temperature is kept at 110° C. for 1 hour. After the heat preservation is over, heat up and under vacuum conditions, slowly distill and recover xylene until no xylene is distilled out, then the distillation can be stopped. Pour the material into the receiving pan for cooling and crystallization. 405 g of crystals were obtained.

[0021] Put 405g of the matting resin synthesized by the first step reaction and 2g of hydroxyalkyl amide, pulverize the mixture on an...

Embodiment 2

[0023] Change methyl methacrylate to 125g, butyl acrylate to 37.5g, azobisethylbutyronitrile to 6.15g, and α-methylstyrene forming dimer to 3.075g and mix evenly, and then 3.075 g of benzoyl oxide and 61.5 g of xylene were premixed, and 307.5 g of xylene was added to a 1000 ml four-necked reaction glass bottle. The amounts and operating conditions of other substances were consistent with those in Example 1 to obtain 313 g of crystals.

[0024] 313g of the matting resin synthesized by the first step reaction and 1.5g of hydroxyalkylamide are pulverized on an ACM vertical mill, and then packaged. The softening point is 118.6°C, and the minimum extinction degree can reach 5°C.

Embodiment 3

[0026] Change methyl methacrylate to 250g, butyl acrylate to 75g, azobisethylbutyronitrile to 9.40g, and α-methylstyrene forming dimer to 4.70g and mix evenly, and then mix the 4.70 g of benzoyl and 94.0 g of xylene were premixed, and 470 g of xylene was added to a 1000 ml four-necked reaction glass bottle. The amounts and operating conditions of other substances were the same as those in Example 1 to obtain 480 g of crystals.

[0027] 480 g of the matting resin synthesized by the first step reaction and 2.2 g of hydroxyalkylamide are pulverized on an ACM vertical mill, and then packaged. The softening point is 116.2°C, and the minimum extinction degree can reach 6.2°C.

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Abstract

The invention relates to a method for preparing a multifunctional acrylic matting resin. The method comprises the following steps: using xylol as a solvent, using three functional monomers, namely glycidyl methacrylate and butyl acrylate, styrene and methyl methacrylate, to synthesize low-molecular-weight matting resin homopolymer under the action of azodiisobutyronitrile and benzoyl peroxide initiator and regulation of an alpha-vinyltoluene formed dimer molecular chain, and mixing the low-molecular-weight matting resin homopolymer and hydroxyalkylamide or triglycidyl isocyanurate to finally obtain the multifunctional matting resin. The method has the advantages that: the inherent advantages of the matting resin is improved through homopolymerization of the plurality of functional monomers and the glycidyl acrylate and optimized improvement on the homopolymerization process, and simultaneously improves the compatibility between the matting resin and powder base stock and reduces the using amount of a flatting agent; and the mechanical strength and the surface scuff resistance of the matting resin are improved through combined actions of mixing other curing agents.

Description

technical field [0001] The invention relates to a weather-resistant powder coating matting curing agent, mainly a preparation method of a multifunctional acrylic matting resin. Background technique [0002] Weather-resistant powder coating matting agents and most of them use physical matting agents, such as matting powder, wax powder, stearate, etc. Most of them have poor matting effects, and it is difficult to obtain low-light weather-resistant powder coatings. British Casamid2228 is a matting curing agent of a catalyst mixture of polybasic acid and amine. It has poor heat resistance, tends to yellow, and affects the storage stability of the powder. Domestically, the matting resin of glycidyl acrylate copolymer has strong matting properties, but there are also problems such as poor compatibility, poor mechanical strength, poor surface scratch resistance, easy to produce fine patterns when matting, and excessive dosage will cause costs. too high issue. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/14C08K5/20C08K5/3492C08F220/32C08F220/14C08F220/18C08F212/08C09D7/12C09D5/03
Inventor 陈雷光朱佩佩刘薇薇
Owner 宁波维楷化学有限公司
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