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Preparation technique of organic silicon resin for high temperature resisting powder paint

A technology for powder coating and preparation process, which is applied in powder coatings, coatings and other directions, can solve the problems of high temperature resistance of powder coatings and high toxicity in the coating industry, and achieve the effects of protecting the environment, good economic benefits, and reducing the degree of gelation

Inactive Publication Date: 2010-06-09
胡孟进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to solve the problem that the high temperature resistant silicone resin prepared by the existing method is used in the coating industry, the toxicity is high and the general low pollution powder coating is not resistant to high temperature. The present invention provides a special silicone resin for high temperature resistant powder coating Resin preparation process, using this method to synthesize low-pollution and high-temperature-resistant solid silicone resin, and can fully meet the processing requirements of powder coatings

Method used

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  • Preparation technique of organic silicon resin for high temperature resisting powder paint
  • Preparation technique of organic silicon resin for high temperature resisting powder paint
  • Preparation technique of organic silicon resin for high temperature resisting powder paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Raw material composition ratio by mass

[0025] Dimethyldichlorosilane 99.9% purity 80 parts

[0026] Monomethyltrichlorosilane Purity>99% 120 parts

[0027] Diphenyldichlorosilane Purity>99% 120 parts

[0028] One-phenyltrichlorosilane Purity>99% 80 parts

[0029] Ester group-containing silicone coupling agent purity > 99% 120 parts

[0030] b. Fully mix the above-mentioned organosilicon monomers in proportion and add them into 600 parts of benzene solvent, add 1200 parts of methyl ethyl ketone and 600 parts of water, control the temperature at 5°C, carry out co-hydrolysis, and then add 1 part of catalyst ring Lead alkanoate telomerization polycondensation, add 140 parts of regulator epoxy-based silicone low molecular weight, reduce gel degree, remove solvent under vacuum negative pressure condition, cool and press tablet to obtain solid product.

[0031] The performance of the prepared silicone resin is basically good, the softening point and leveling property ...

Embodiment 2

[0033] a. Raw material composition ratio by mass

[0034] Dimethyldichlorosilane 99.9% purity 60 parts

[0035] Monomethyltrichlorosilane Purity>99% 110 parts

[0036] Diphenyldichlorosilane Purity>99% 110 parts

[0037] One-phenyltrichlorosilane Purity>99% 60 parts

[0038] Methyl vinyl dichlorosilane purity > 99% 65 parts

[0039] Methyl hydrodichlorosilane Purity>99% 60 parts

[0040] Hydroxyl-containing organosilicon coupling agent purity>99% 100 parts

[0041] b. Fully mix the above-mentioned organosilicon monomers in proportion, add them to 800 parts of benzene solvent, add 1800 parts of butyl ethyl ether and 900 parts of water, control the temperature at 10°C, carry out co-hydrolysis, and then add 0.8 parts of catalyst Platinum salt telomerization and polycondensation, adding 180 parts of regulator hydroxy silicone low molecular weight to reduce the degree of gelation, removing the solvent under vacuum and negative pressure, cooling and pressing to obtain a solid p...

Embodiment 3

[0044] a. Raw material composition ratio by mass

[0045] Dimethyldichlorosilane 99.9% purity 60 parts

[0046] Monomethyltrichlorosilane Purity>99% 120 parts

[0047] Diphenyldichlorosilane purity>99% 60 parts

[0048] One-phenyltrichlorosilane Purity>99% 110 parts

[0049] Epoxy-containing organosilicon coupling agent purity >99% 140 parts

[0050]b. Fully mix the above-mentioned organosilicon monomers in proportion and add them to 500 parts of benzene solvent, add 1800 parts of methyl ethyl ketone and 1000 parts of water, control the temperature below 10°C, carry out co-hydrolysis, and then add 1 part Catalyst zinc acetate for telomerization and polycondensation, add 140 parts of regulator hydroxyorganosilicon low molecular weight, reduce gel degree, remove solvent under vacuum negative pressure condition, cool and press tablet to obtain solid product.

[0051] The obtained silicone resin has good performance, but it has a slight gel, and the processing performance is g...

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Abstract

The present invention relates to silicone resin preparing process, and is especially process of preparing silicone resin specially for heat resistant powder paint. The silicone resin specially for heat resistant powder paint is prepared through adding the mixture of common silicone monomer and special silicone monomer in water insoluble organic solvent with boiling point lower than 100 deg.c, co-hydrolyzing in water and ketone, ether or ester at temperature lower than 25 deg.c, catalytically polycondensating and regulating activity with regulator, evaporating out solvent, cooling and tabletting. The silicone resin specially is applied for heat resistant powder paint, and has environment friendship and construction safety.

Description

technical field [0001] The invention relates to a preparation process of organosilicon resin, in particular to a preparation process of special organosilicon resin for high-temperature-resistant powder coatings. Background technique [0002] Silicone resin has been widely recognized as a high-temperature resistant coating. The traditional preparation method is to process it into a toluene solution with a solid content of about 50%, and sell it as a solvent-based resin. [0003] The preparation method of solvent-based resin is as follows: figure 1 As shown, this solvent-based silicone resin is suitable for preparing high-temperature-resistant and high-insulation coatings for various purposes. The coating processing methods are as follows: figure 2 As shown, it can be seen that this method will produce greater toxicity and pollute the environment during operation. In order to protect the environment and reduce pollution, the development of the paint industry is mainly to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/16C09D5/03C08G77/60
Inventor 胡孟进王亚维
Owner 胡孟进
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