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Deep-drawing-resistant water-based acrylic modified polyester resin and preparation method thereof

A technology of water-based acrylic and modified polyester, which is applied in the direction of polyester coatings and coatings. It can solve the problems of poor paint film gloss, ethanol resistance, and impact resistance, and achieve good hydrolysis resistance and storage stability. Good mechanical stability and high hardness

Active Publication Date: 2019-05-10
ZHEJIANG TIANNU GROUP PAINT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hydroxyl-containing resins used in amino baking varnishes are generally water-based emulsion type acrylic resins. The gloss and ethanol resistance of paint films prepared from such resins are poor; the impact resistance of thicker paint films is poor, so it is not suitable for Where flexibility is required

Method used

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  • Deep-drawing-resistant water-based acrylic modified polyester resin and preparation method thereof
  • Deep-drawing-resistant water-based acrylic modified polyester resin and preparation method thereof
  • Deep-drawing-resistant water-based acrylic modified polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: prepare acrylic acid prepolymer A:

[0023] Weigh 160 kilograms of ethylene glycol butyl ether and 150 kilograms of glycidyl tert-carbonate into a reactor equipped with a stirring device, a reflux condensing device, a dropping device and a temperature control device, and heat up to 120-130 ° C under stirring. 200 kg of methyl methacrylate, 160 kg of styrene, 100 kg of butyl acrylate, 90 kg of lauryl methacrylate, 80 kg of methacrylic acid and 15 kg of di-tert-butyl peroxide form a mixed monomer, in the reaction system Add 70% of the total amount of the mixed monomer dropwise, and finish dripping under stirring for 3 hours; add 30 kg of KH570 to the remaining mixed monomer, and add dropwise to the reaction system within 1.5 hours under stirring; keep warm for 0.5-1 hour, The remaining 5 kg of initiator was added to the remaining 40 kg of co-solvent, and added to the reaction system, kept stirring at 130° C. for 1 hour, cooled and discharged.

Embodiment 2

[0024] Embodiment 2: Preparation of acrylic acid prepolymer B:

[0025] Weigh 160 kilograms of ethylene glycol butyl ether and 150 kilograms of glycidyl tert-carbonate into a reactor equipped with a stirring device, a reflux condensing device, a dropping device and a temperature control device, and heat up to 120-130 ° C under stirring. 200 kg of methyl methacrylate, 160 kg of styrene, 100 kg of butyl acrylate, 90 kg of lauryl methacrylate, 80 kg of methacrylic acid and 15 kg of di-tert-butyl peroxide form a mixed monomer, in the reaction system Add 70% of the total amount of the mixed monomer dropwise, and finish dripping under stirring for 3 hours; add 60 kg of KH570 to the remaining mixed monomer, and add dropwise to the reaction system within 1.5 hours under stirring; keep warm for 0.5 to 1 hour, The remaining 5 kg of initiator was added to the remaining 40 kg of co-solvent, and added to the reaction system, kept stirring at 130° C. for 1 hour, cooled and discharged.

Embodiment 3

[0026] Embodiment 3: prepare acrylic acid prepolymer C:

[0027] Weigh 160 kilograms of ethylene glycol butyl ether and 150 kilograms of glycidyl tert-carbonate into a reactor equipped with a stirring device, a reflux condensing device, a dropping device and a temperature control device, and heat up to 120-130 ° C under stirring. 170 kilograms of methyl methacrylate, 110 kilograms of styrene, 180 kilograms of butyl acrylate, 90 kilograms of lauryl methacrylate, 80 kilograms of methacrylic acid and 15 kilograms of di-tert-butyl peroxide form a mixed monomer, in the reaction system Add 70% of the total amount of the mixed monomer dropwise, and finish dripping under stirring for 3 hours; add 30 kg of KH570 to the remaining mixed monomer, and add dropwise to the reaction system within 1.5 hours under stirring; keep warm for 0.5-1 hour, The remaining 5 kg of initiator was added to the remaining 40 kg of co-solvent, and added to the reaction system, kept stirring at 130° C. for 1 ho...

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Abstract

The invention relates to the technical field of paint preparation, in particular to deep-drawing-resistant water-based acrylic modified polyester resin and a preparation method thereof. The preparation method includes the steps: firstly, performing free radical polymerization on acrylate mixed monomers with preset acid values (hydroxyl values), vinyl siloxane and tert-carboxylic acid glycidyl ester in organic solvents to form an acrylic prepolymer; secondly, esterifying the acrylic prepolymer with monoacid, polyacid and polyols, and synthesizing the water-based acrylic modified polyester resinafter neutralization. Amino baking paint is prepared from the resin and completely methylated amino resin or high-imino-group amino resin, a paint film is full and bright, and the amino baking paintis good in adhesion, high in hardness, good in impact resistance, good in cup drawing and applicable to places requiring high toughness.

Description

technical field [0001] The invention relates to the technical field of paint preparation, in particular to an acrylic modified polyester resin and a preparation method thereof. Background technique [0002] Amino baking varnish has the advantages of bright color, brightness, hardness, water resistance, impact resistance, etc., so it is widely used in industrial products with high decorative requirements. The traditional amino baking varnish is composed of amino resin and hydroxyl resin in a certain proportion, and is heated and cured at high temperature to form a complex network polymer. Pack and protect. At present, the hydroxyl-containing resins used in amino baking varnishes are generally water-based emulsion type acrylic resins. The gloss and ethanol resistance of paint films prepared from such resins are poor; the impact resistance of thicker paint films is poor, so it is not suitable for Where flexibility is required. Contents of the invention [0003] The purpose...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/85C09D167/02C09D133/12
Inventor 姚飞董月林杨立峰王炳华
Owner ZHEJIANG TIANNU GROUP PAINT MFG
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