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A kind of latex particle toughened methyl silicone resin and preparation method thereof

A technology of methyl silicone resin and methyl trialkoxy silane, which is applied in the field of latex particle toughened methyl silicone resin and its preparation, can solve the problems of easy cracking and cracks, and achieve the avoidance of bursting, high hardness, Effects of Avoiding Cracking Behavior

Active Publication Date: 2017-03-29
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is: provide a kind of latex particle toughened methyl silicone resin, this resin overcomes the brittleness of existing methyl silicone resin, is easy to crack during the curing process, and the formed coating, in the outside world The disadvantage of cracks often occurs when the environment is constantly changing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ① Prepare each component according to the following formula

[0033] Deionization 50g; acid catalyst acetic acid 1g; methyltrimethoxysilane 40g; emulsion is anionic polyacrylic acid emulsion (CT-6910) 5g (based on its latex particle content); curing agent is tetramethylammonium hydroxide 0.1g ;

[0034] ②In a 250mL round bottom flask, add deionized water, acidic catalyst and methyltrialkoxysilane in sequence, stir and react at 25°C for 2 hours to complete the hydrolysis pre-polymerization, then add the emulsion and stir for 3 minutes to mix well;

[0035] ③ After adding the curing agent to the liquid material obtained in step ②, stir for 3 minutes and mix evenly to obtain the methyl silicone resin toughened by latex particles.

[0036] Coat the methyl silicone resin toughened by the latex particles obtained in Example 1 on the tin plate, the coating thickness is controlled at <50 μm, pre-dried at 60°C for 10 minutes, and then cured at 80°C for 1 hour, and the obtained ...

Embodiment 2

[0038] ① Prepare each component according to the following formula

[0039] Deionization 50g; acidic catalyst acetic acid 1g; methyltrimethoxysilane 40g; phenyltrimethoxysilane 5g; the emulsion is anionic polyacrylic acid emulsion (CT-6910) 40g (based on the latex particle content); the curing agent is Tetramethylammonium hydroxide 0.1g;

[0040] ②In a 250mL round-bottomed flask, add deionized water, acid catalyst, methyltrimethoxysilane and phenyltrimethoxysilane in sequence, and stir at 25°C for 2 hours to complete the hydrolysis prepolymerization, then add the emulsion and stir for 5 minutes well mixed;

[0041] ③ After adding the curing agent to the liquid material obtained in step ②, stir for 3 minutes and mix evenly to obtain the methyl silicone resin toughened by latex particles.

[0042] Coat the methyl silicone resin toughened by the latex particles obtained in Example 2 on the tin plate, the coating thickness is controlled at <50 μm, pre-dried at 60°C for 10 minute...

Embodiment 3

[0044] ① Prepare each component according to the following formula

[0045] Deionization 20g; acid catalyst is acetic acid 0.5g; methyltrimethoxysilane 50g; phenyltrimethoxysilane 5g; emulsion is cationic polyacrylic acid emulsion (JH-1840) 2g (based on its latex particle content); curing The agent is tetramethylammonium hydroxide 0.1g, leveling agent 0.2g;

[0046] ②In a 250mL round bottom flask, add the emulsion first, then add deionized water, acid catalyst, methyltrimethoxysilane and phenyltrimethoxysilane to the emulsion in turn, stir at room temperature for 4 hours to complete the hydrolysis prepolymerization;

[0047] ③ After adding curing agent and leveling agent to the liquid material obtained in step ②, stir for 3 minutes and mix evenly to obtain the methyl silicone resin toughened by latex particles.

[0048] Use the methyl silicone resin toughened by the latex particles obtained in Example 3 to coat on the PMMA plate, the coating film thickness is controlled at <5...

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Abstract

The invention relates to latex particle toughened methyl silicone resin and a preparation method thereof. The resin disclosed by the invention contains the ingredients in gram by weight: 2-50g of emulsion metered by latex particle content, 0-60g of deionized water, 30-80g of methyl trialkoxysilane, 0-30g of tetra-alkoxysilane, 0-15g of phenyl trialkoxysilane, 0-10g of dimethyl dialkoxysilane, 0-10g of silane coupling agent, 0-10g of acidic catalyst, 0.02-0.5g of curing agent, 0-15g of ethanol or isopropanol, 0-0.5g of leveling agent and 0-0.5g of antifoamer. The resin disclosed by the invention has the biggest advantage that a very good toughening effect can be realized by latex particles of a small volume of emulsion, and a film formed material is endowed with very good flexibility while high hardness for the methyl silicone resin is maintained. The preparation method is simple, is good in environmental friendliness and facilitates large-scale production. The surface protection effect for hard or flexible transparent and opaque plastic parts is good.

Description

technical field [0001] The invention relates to a latex particle toughened methyl silicone resin and a preparation method thereof. It is especially suitable for the surface protection of hard or flexible transparent and opaque plastic parts, as well as for the weather protection of metal surfaces and stone materials. Background technique [0002] Methyl silicone resin is a kind of MeSiO 1.5 , Me 2 SiO, Me 3 SiO 0.5 and SiO 2 Chain link combination as the main polysiloxane product. This product has the advantages of being hard and transparent, less weight loss at high temperature, etc. It is widely used in wear-resistant and hardened coatings, high-temperature resistant mica binders and resistance coatings. However, due to the brittleness of methyl silicone resin, it is easy to crack during the curing process, and the formed coating often cracks or even peels off from the substrate when the external environment changes continuously. These defects greatly limit the appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D133/00C09D163/00C09D7/12C08G77/04
Inventor 陈子辉刘仲阳王李军
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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