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Modified acrylic resin for automobile paint, preparation method and automobile primer-topcoat paint

A technology of acrylic resin and automotive paint, applied in the direction of coating, etc., can solve the problems such as coating is difficult to meet, achieve strong adhesion, improve high and low temperature resistance and water resistance, and improve adhesion

Active Publication Date: 2019-12-20
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 automobile primer-topcoat paint
  • Modified acrylic resin for automobile paint, preparation method and automobile primer-topcoat paint
  • Modified acrylic resin for automobile paint, preparation method and automobile primer-topcoat paint

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 includes 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 Including 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 a dotted line part exists, it represents a naphthyl group; when a dotted line 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 an alkyl or alkoxy group.

[0067] Preferably, the structural unit A comprises:

[0068]

[0069]

[0070] Preferably, the structural unit B comprises:

[0071]

[0072] ...

Embodiment 2

[0076] This example provides the preparation method of modified acrylic resin for automobile paint, specifically: under the protection of inert gas, add the monomers containing structural units A, B and C into water, then add initiator, emulsifier and toluene to heat and react After the reaction is completed and cooled, the modified acrylic resin for automotive 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] Wherein, 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, add 10 mL of toluene into the flask and heat to 95°C. Then open the dropping funnel, slowly drop the structural unit solution into the flask, finish dropping within 4 hours...

Embodiment 3

[0080] This example provides a kind of vehicle bottom and surface all-in-one paint, comprises the following components in parts by weight:

[0081] The above-mentioned 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 parts of anti-settling agent, 1.0-1.5 parts of dispersant, 1.0-1.5 parts of thickener, 0.5-1.0 parts of ultraviolet absorber, 10-20 parts of curing agent, 20-40 parts of water.

[0082] Wherein, the pigment includes titanium dioxide. The leveling agent includes at least one of Wacker HDK@N20, HDK@N20D and HDK@T30. The antifoaming agent includes at least one of DISPERBYK-118 and DISPERBYK-2158. The anti-settling agent is at least one of Elements P200X anti-settling agent and BYK ANTI-TERRA-203. The dispersant is at least one of BYK DISPERBYK-118 or DISPERBYK-2158. Th...

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Abstract

The embodiment of the invention provides modified acrylic resin for automobile paint, a preparation method and automobile primer-topcoat paint. A main chain of the modified acrylic resin comprises structural units A, B and C, wherein the structural unit A is hydroxyl-containing methacrylate, the structural unit B comprises a structure of substituted styrene, and the structural unit C comprises a structure of vinyl silane. The preparation method of the modified acrylic resin provided by the embodiment of the invention has the advantages of simple steps, non-harsh process conditions and low equipment requirement. Besides environmental friendliness, the automobile primer-topcoat paint provided by the embodiment of the invention has the advantages of easy construction, good paint film performance, high hardness, high adhesive force, high glossiness 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 paints, a preparation method and an automobile bottom-surface-in-one paint. Background technique [0002] With the vigorous development of the automobile industry, automotive coatings have undergone four major upgrades. After the initial oily coatings developed into nitro paints, synthetic resin coatings mainly based on alkyd and phenolic resins appeared. Electrophoretic coatings and high-quality synthetic resins have been developed, such as epoxy coatings, amino alkyd coatings, acrylic coatings, polyester coatings, and polyurethane coatings. In recent years, environmentally friendly coatings have also been developed. [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 Compou...

Claims

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Application Information

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Patent Type & Authority Applications(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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