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Modified acrylic resin for automobile paint, preparation method and bottom-in-one paint for automobile

A technology of acrylic resin and bottom surface, applied in the direction of coating, etc., can solve the problems that the coating is difficult to meet, and achieve the effect of strong adhesion, high hardness and good paint film performance

Active Publication Date: 2021-08-10
亿美(新丰)实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of implementing the embodiments of the present application, the inventors of the present application found that the current water-based automotive paint resins, due to the performance and characteristics of the resins, are difficult to meet the requirements of the prepared coatings while having excellent protection for the car body. Pleasing appearance effect

Method used

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  • Modified acrylic resin for automobile paint, preparation method and bottom-in-one paint for automobile
  • Modified acrylic resin for automobile paint, preparation method and bottom-in-one paint for automobile
  • Modified acrylic resin for automobile paint, preparation method and bottom-in-one paint for automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This example provides a modified acrylic resin for automotive paint, the main chain of the modified acrylic resin comprises structural units A, B and C;

[0058] The general formula of the structural unit A is:

[0059] where R 1 is a substituent containing at least one hydroxyl group;

[0060] The general formula of the structural unit B is:

[0061] where R 2 Include at least one of a hydrogen atom, a hydroxyl group or an alkyl group;

[0062] In the general formula of the structural unit B, when the dashed part exists, it represents a naphthyl group; when the dashed part does not exist, it represents a benzene ring.

[0063] That is, the general formula of structural unit B is:

[0064]

[0065] The general formula of the structural unit C is:

[0066] where R 3 is alkyl or alkoxy.

[0067] Preferably, the structural unit A includes:

[0068]

[0069]

[0070] Preferably, the structural unit B includes:

[0071]

[0072] Preferably, the st...

Embodiment 2

[0076] This example provides a preparation method of modified acrylic resin for automotive paint, specifically: under the protection of inert gas, adding monomers containing structural units A, B and C into water, then adding initiator, emulsifier and toluene for heating reaction , and after the reaction is completed and cooled, the modified acrylic resin for automobile paint is obtained by distillation under reduced pressure.

[0077] When preparing modified acrylic resin for automotive paint, the mass ratio of monomer solution, initiator, emulsifier, toluene and water (100-200): (10-20): (5-10): (10-50): (300~500).

[0078] Among them, the inert gas is preferably nitrogen, the water is deionized water, the initiator is potassium persulfate, and the emulsifier is OP-10. During preparation, under nitrogen protection, 10 mL of toluene was added to the flask and heated to 95°C. Then open the dropping funnel and slowly drop the structural unit solution into the flask. The dropp...

Embodiment 3

[0080] This example provides an all-in-one paint for vehicle bottom surface, including the following components in parts by weight:

[0081] 20-30 parts of modified acrylic resin for automobile paint, or 20-30 parts of modified acrylic resin for automobile paint prepared by the above-mentioned preparation method, 20-40 parts of pigment, 0.5-1 part of leveling agent, 0.5-1.0 part of defoamer, 0.5-1.0 part of anti-settling agent, 1.0-1.5 part of dispersant, 1.0-1.5 part of thickener, 0.5-1.0 part of ultraviolet absorber, 10-20 parts of curing agent, and 20-40 parts of water.

[0082] Among them, the pigment includes titanium dioxide. The leveling agent includes at least one of WACKER HDK@N20, HDK@N20D and HDK@T30. The defoamer includes at least one of DISPERBYK-118 and DISPERBYK-2158. The anti-settling agent is at least one of Hemings P200X anti-settling agent and BYK ANTI-TERRA-203. The dispersant is at least one of BYK DISPERBYK-118 or DISPERBYK-2158. The thickener was Roh...

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Abstract

Embodiments of the present invention provide a modified acrylic resin for automobile paint, a preparation method, and a bottom-surface-integrated paint for automobiles. Among them, the main chain of the modified acrylic resin contains structural units A, B and C, wherein the structural unit A is a methacrylate containing a hydroxyl group, the structural unit B contains a substituted styrene structure, and the structural unit C contains a vinyl silane structure. The preparation method of the modified acrylic resin provided by the embodiment of the present invention has simple steps, not harsh process conditions, and low equipment requirements. In addition to environmental friendliness, the automotive bottom-surface all-in-one paint provided by the embodiment of the present invention is easy to construct, has good paint film performance, high hardness, strong adhesion, high gloss, and good weather resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a modified acrylic resin for automobile paint, a preparation method and a vehicle bottom surface integrated paint. Background technique [0002] With the vigorous development of the automotive industry, automotive coatings have undergone four major upgrades. After the initial oil-based coatings developed into nitro-based coatings, synthetic resin coatings based on alkyd and phenolic appeared. Developed electrophoretic coatings and high-quality synthetic resins, such as epoxy coatings, aminoalkyd coatings, acrylic coatings, polyester coatings and polyurethane coatings, etc., and developed environmentally friendly coatings in recent years. [0003] Most of the traditional car paints use oil-based paints, that is, a large amount of organic solvents are used in car paints, resulting in a large amount of volatile components VOC (Volatile Organic Compound) in the paint. D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/20C08F212/08C08F212/12C08F212/14C08F212/32C08F230/08C09D133/14
CPCC08F220/20C09D143/04
Inventor 钱晓飞毛建方
Owner 亿美(新丰)实业有限公司
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