Silicone-modified methacrylic resin as well as preparation method and application thereof

A technology of methacrylic acid and methacrylate, applied in the direction of coating, etc., can solve the problems of limited application and expensive POSS, and achieve the effects of improved heat resistance, improved stain resistance, and increased glass transition temperature

Inactive Publication Date: 2013-05-08
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Silicone resin is a cross-linked semi-inorganic polymer with Si-O-Si as the main chain and organic groups connected to silicon atoms. It has excellent heat resistance and weather resistance, as well as excellent electrical insulation and chemical resistance. Drug resistance, hydrophobicity and flame retardancy, and polysilsesquioxanes (polysilsesquioxanes, PSSQ) is a class of structural formula (RSiO 3 / 2 ) n silicone resin with a special nanostructure, many scholars at home and abroad have studied polyhedral oligomeric silsesquioxane (Polyhedral Oligomeric Silsesquioxane, POSS) to modify polymethyl methacrylate PMMA has achieved good results, but currently POSS is extremely expensive and its applications are extremely limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 100g of the 50% methacrylate copolymer P1 solution prepared in Comparative Example 1 above, add 25g of methyl MQ silicone resin (M / Q=0.9, hydroxyl 1.1wt%, purchased from Jilin Huafeng Organic Silicon Co., Ltd.), 5g of zinc acetate was mixed uniformly to obtain a silicone-modified methacrylic resin. At this time, the ratio of the methacrylic resin, silicone resin, organic solvent and catalyst was 100:50:100:10.

[0032] Then take a sample of 10g of the coating film, first place it at 80°C for 10 minutes, then place it in an oven at 180°C for 1 hour to solidify, take it out, cool it, and measure the softening point, Glass transition temperature Tg, water contact angle, water absorption and coating stain resistance. The test results are listed in Table 1.

Embodiment 2

[0034] Take 100g of the 50% methacrylate copolymer P1 solution prepared in Comparative Example 1 above, add 200g of butanone, methyl MQ silicone resin (M / Q=0.65, hydroxyl 2.3wt%), purchased from Guangzhou Delta Silicone Technology Development Co., Ltd.) 35g, zinc acetylacetonate 5g, mix well to obtain silicone resin modified methacrylic resin, at this time the ratio of methacrylic resin, silicone resin, organic solvent and catalyst is 100:70:500:10.

[0035] Then take a sample of 10g of the coating film, first place it at 70°C for 20 minutes, then place it in an oven at 180°C for 1 hour to solidify, take it out, cool it, and measure the softening point, Glass transition temperature Tg, water contact angle, water absorption and coating stain resistance. The test results are listed in Table 1.

Embodiment 3

[0037] Take 100g of the 50% methacrylate copolymer P1 solution prepared in Comparative Example 1 above, add methyl MQ silicone resin (M / Q=0.85, 0.7wt% hydroxyl, 9.3wt% ethoxy, purchased from Jilin Huafeng Organic Silicon Co., Ltd.) 10g, stannous octoate 0.1g, mix evenly to obtain silicone resin modified methacrylic resin, at this time the ratio of methacrylic resin, silicone resin, organic solvent and catalyst is 100:20:100:0.2.

[0038] Then take a sample of 10g of the coating film, first place it at 100°C for 10 minutes, then place it in an oven at 180°C for 1 hour to solidify, take it out, cool it, and measure the softening point, Glass transition temperature Tg, water contact angle, water absorption and coating stain resistance. The test results are listed in Table 1.

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Abstract

The invention relates to modified methacrylic resin, and discloses silicone-modified methacrylic resin as well as a preparation method and application thereof. The silicone-modified methacrylic resin is prepared from 100 parts of functional methacrylate copolymer, 20-70 parts of active MQ silicone, 100-500 parts of organic solvent, and 0.2-10 parts of catalyst in a manner of evenly mixing. The silicone-modified methacrylic resin is firstly kept still for 10-20 minutes at 70-100 DEG C, and then cured for 1-2 hours at 140-180 DEGC to obtain a heat-resistant hydrophobic coating of the silicone-modified methacrylic resin. The heat resistance of the silicone-modified methacrylic resin disclosed by the invention is obviously improved; the glass-transition temperature can be up to over 250 DEG C; the hydrophobicity and the stain resistance are obviously improved; the water contact angle of a copolymer film can be up to over 120 DEG C; the water absorption of three days is smaller than 0.1%; and the stain resistance is level zero.

Description

technical field [0001] The invention relates to a modified methacrylic resin, in particular to a silicone modified methacrylic resin and its preparation method and application. Background technique [0002] Methacrylate polymer has excellent weather resistance, light resistance, oil resistance, good adhesion to polar and non-polar surfaces, etc. Difference. The glass transition temperature Tg of polymethyl methacrylate is only 105°C, the heat distortion temperature is only 95°C, and the service temperature is <80°C. With the increase of the side chain ester group segment, the polymer Tg drops rapidly. Both the heat deflection temperature and service temperature of a polymer depend on the Tg of the polymer. Therefore, trying to improve Tg without affecting other properties is one of the research and application directions of high heat-resistant methacrylic resin. [0003] Methacrylate polymers contain a large number of ester groups, have strong hygroscopicity, and poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09D187/00C09D5/00
Inventor 黄月文罗广建王绥经刘伟区
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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