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Organosilicon ingredient toughened methyl silicone resin and preparation method thereof

A technology of methyl silicone resin and organosilicon, which is applied in the field of methyl silicone resin and its preparation, can solve problems such as easy cracking and cracks, and achieve the effects of good heat and humidity resistance, simple preparation process, high hardness and abrasion resistance

Active Publication Date: 2015-09-16
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 to provide a kind of methyl silicone resin toughened by organic silicon components with high hardness, good flexibility and high temperature resistance, which overcomes the brittleness of existing methyl silicone resins It is easy to crack during the process, and the formed coating film often has the disadvantage of cracks when the external environment changes continuously.

Method used

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  • Organosilicon ingredient toughened methyl silicone resin and preparation method thereof
  • Organosilicon ingredient toughened methyl silicone resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation of silicone component toughened methyl silicone resin

[0039] ① Prepare the following components: 15g deionization, 1g acid catalyst acetic acid, 40g methyltrimethoxysilane, 5g phenyltrimethoxysilane, 0.1g curing agent tetramethylammonium hydroxide, 0.1g leveling agent, Save for later use;

[0040] ②Put a 250mL round-bottomed flask in a water bath, add 24 g of vinyltriethoxysiloxane and 1.44 g of Speier catalyst in sequence, stir in a water bath at room temperature, and then dropwise add 80 g of terminal Hydrogen silicone oil, control the temperature of the reaction solution ≤ 80°C, after the dropwise addition, continue to stir for 2 hours, then continue to react at 80°C for 2 hours to obtain the organosilicon component, save it for later use, wherein the amount of vinyl siloxane added is the same as The molar ratio of SiH groups in hydrogen-terminated silicone oil is 1:1; the amount of platinum catalyst is 0.03wt% of the amount of vinyl siloxane...

Embodiment 2

[0045] Example 2 Preparation of silicone component toughened methyl silicone resin

[0046] ① Prepare the following components: 14.8g acidic silica sol silica, 1.2g acid catalyst acetic acid, 46g methyltriethoxysilane, 5g phenyltrimethoxysilane, 1.2g silane coupling agent γ-(2,3 -propylene oxide) propyltrimethoxysilane, 0.1g curing agent tetramethylammonium hydroxide, 0.1g leveling agent, save for subsequent use;

[0047] 2. Prepare the organosilicon component by the same method as in Example 1, and save it for future use;

[0048] ③In a 100ml round bottom flask, add the acidic silica sol silicon prepared in step ①, acidic catalyst acetic acid, methyltriethoxysilane, phenyltrimethoxysilane, and silane coupling agent in sequence, and stir and mix at room temperature After 4 hours, add 4g of the silicone component prepared in step ②, and then stir and react at 80°C for 2 hours to obtain a hydrolyzed prepolymerized product, add the curing agent tetramethylammonium hydroxide and ...

Embodiment 3

[0050] Example 3 Preparation of silicone component toughened methyl silicone resin

[0051] ① Prepare each component: 14.8g acidic silica sol silica, with an average particle size of 12nm, 1.2g acidic catalyst acetic acid, 46g methyltriethoxysilane, 5g phenyltrimethoxysilane, 1.2g coupling agent γ-( 2,3-propylene oxide) propyltrimethoxysilane, 40mg curing agent aluminum acetylacetonate, 0.1g leveling agent, save for later use;

[0052] 2. Prepare the organosilicon component by the same method as in Example 1, and save it for future use;

[0053] ③In a 100ml round bottom flask, first add 20g of ethanol and 2g of acetic acid aqueous solution with a pH value of 4~5, then add 2g of the organic silicon component prepared in step ②, stir at room temperature for 2 hours, then continue at 80°C React for 2 hours to obtain the hydrolysis prepolymerization product of the organosilicon component; in another 100ml round bottom flask, add the acidic silica sol, acidic catalyst, methyltriet...

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Abstract

The invention relates to organosilicon component toughened methyl silicone resin and a preparation method thereof. The resin contains the ingredients in gram by weight: 2-30g of organosilicon component, 20-40g of deionized water or acidic silica sol, 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 and 0-0.5g of leveling agent, wherein the organosilicon component is synthesized from terminal-hydrogen silicone oil and vinyl siloxane in the presence of a catalyst. The resin disclosed by the invention has the biggest advantage that a film formed material is endowed with very good flexibility, wet-heat resistance and high-temperature resistance while high hardness for the methylsilicone 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 methyl silicone resin toughened by organosilicon components 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 film often cracks or even peels off from the substrate when the external environment changes continuously. These defects grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D7/12C08G77/38
Inventor 陈子辉刘仲阳王李军
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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