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A kind of high-scratch-resistant high-temperature varnish and its preparation method

A technology of high-temperature varnish and conversion temperature, applied in the direction of coating, etc., can solve the problems of poor scratch resistance and achieve high scratch resistance

Active Publication Date: 2015-11-25
浙江曼得丽涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor scratch resistance of high-temperature varnishes for automobile bodies in the prior art, to provide an acrylic-amino type finish varnish with high scratch resistance for automobile exterior coating and its preparation method

Method used

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  • A kind of high-scratch-resistant high-temperature varnish and its preparation method
  • A kind of high-scratch-resistant high-temperature varnish and its preparation method
  • A kind of high-scratch-resistant high-temperature varnish and its preparation method

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preparation example Construction

[0020] In the preparation method of the above-mentioned high-temperature varnish, the high-temperature varnish is prepared according to the following components and weight percentages:

[0021] Thermosetting acrylic resin 30-40%;

[0022] Anti-sagging resin 14-22%;

[0023] Amino resin 20-28%;

[0024] Organic solvent 10-25%;

[0025] Catalyst 0.1-1.2%;

[0026] Auxiliary 1.4-6.5%.

[0027] The usage of preferred scheme preparation method of the present invention and the varnish provided by the present invention are as follows:

[0028] Preparation method: Put all the resins (including thermosetting acrylic resin, anti-sagging resin, amino resin) into the mixer and stir for 15 minutes; then add catalyst and all additives, and add appropriate amount of solvent (as long as the viscosity is easy to stir. can), stirred for 30 minutes; then added the remaining solvent, stirred for 15 minutes; the varnish provided by the present invention was obtained.

[0029] The usage of th...

Embodiment 1

[0033] The following examples illustrate the varnishes provided by the invention and their preparation.

[0034] 30.0 parts by weight of thermosetting acrylic resin A (Tg: -10°C, acid value 10.0, hydroxyl value 120mgKOH / g), 21.0 parts by weight of anti-sagging resin (Setalux91795VX-60 of Nuplex) and 24.0 parts by weight of amino resin (methylated Melamine formaldehyde resin) was added in the stirrer, stirred for 30 minutes; Added p-toluenesulfonic acid catalyst of 0.6 weight part, 0.5 weight part auxiliary agent (including 0.1 weight organosilicon leveling agent, 0.2 weight acrylic acid leveling agent, 0.2 weight anti Prickly heat auxiliary agent BYK390), and finally add 23.9 parts by weight of an organic solvent (Solvesso100 of Jiang Haitian Company), and stir for 15 minutes; the varnish T1 provided by the invention is obtained.

Embodiment 2

[0036] The following examples illustrate the varnishes provided by the invention and their preparation.

[0037] Prepare the varnish according to the method of Example 1, the difference is that the resin components and content are: 40.0 parts by weight of thermosetting acrylic resin B (Tg: -10°C, acid value 7.5, hydroxyl value 90mgKOH / g), 15.0 parts by weight Anti-sag resin (Setalux91795VX-60 of Nuplex) and 25.0 parts by weight of amino resin (methylated melamine formaldehyde resin), other components and content are identical with embodiment 1 (organic solvent (Solvesso100 of Jianghaitian company) in this formula content is 18.9 parts by weight). The varnish T2 provided by the present invention is obtained.

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Abstract

The invention discloses a high-temperature varnish, comprising thermosetting acrylic resin, anti-sagging resin, amino resin, organic solvent, catalyst and assistant, wherein the thermosetting acrylic resin contains thermosetting acrylic resin I; the glass transition temperature of the thermosetting acrylic resin I is not more than -5 DEG C, the hydroxyl resin is 50-120mg KOH / g and acid value is 7.5-15; the thermosetting acrylic resin is 30-40wt% of total content of the high-temperature varnish. The high-temperature varnish provided by the invention has high scratch resistance.

Description

technical field [0001] The invention relates to a high-temperature varnish, in particular to an acrylic-amino type finish varnish with high anti-scratch performance for automobile exterior coating and a preparation method thereof. Background technique [0002] In order to prevent rust and look beautiful, the car body needs to be sprayed with multiple layers of organic paint on its surface. With the development of science, the performance requirements of these coatings are getting higher and higher. At the same time, the EU's environmental protection requirements for various products are also getting higher and higher. RoHS) and the EU regulation "Registration, Evaluation, Authorization and Restriction of Chemicals" (REACH) regulations have been implemented successively, and there are more restrictions on organic coatings. For multi-coated car bodies, the performance of the topmost organic coating is critical. [0003] At present, the common paints for automobile body are p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D133/02C09D133/04C09D161/20C09D161/32C09D7/12
Inventor 刘合文王法蒙飞
Owner 浙江曼得丽涂料有限公司