Foaming bi-component organic silicon pouring sealant and preparation method thereof

A silicone potting adhesive and two-component technology, applied in the field of silicone potting adhesive and its preparation, can solve the problems of poor foaming uniformity, difficulty in controlling foaming degree and speed, and achieve uniform foaming and flame retardancy. The effect of good performance and simple production process

Inactive Publication Date: 2019-05-31
西卡(江苏)工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing low-density foamed silicone rubber, its foaming degree and speed are difficult to control, so the foaming uniformity in the obtained low-density foamed silicone rubber is relatively poor

Method used

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  • Foaming bi-component organic silicon pouring sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 50 parts of 2000mPa·s α,ω-dihydroxy polydimethylsiloxane, 45 parts of aluminum hydroxide, 40 parts of aluminum oxide and 10 parts of 30mPa·s polyfunctional hydroxyl silicone resin into 1000L high-speed In a stirred tank, stir in vacuum for 2 hours, the vacuum degree is -0.95MPa, then add 50 parts of 1000mPa·s α,ω-dihydroxy polydimethylsiloxane, 5 parts of hydrogen content of 0.75% Hydrogen-containing silicone oil, 1 part of 2-methyl-3-butyn-2-ol, 3 parts of MQ silicone resin treated with fluoroalcohol, 5 parts of octanol, mixed and stirred at high speed for 0.5h, and then vacuum degassed to obtain component A ; Prereact 100 parts of alkoxy-terminated polydimethylsiloxane with a viscosity of 1000 mPa·s and 10 parts of aminosilane oligomers at a temperature of 100 ° C for 0.5 h, cool to room temperature and mix 25 parts of polysilicic acid Ethyl ester, 20 parts of dimethyldiethoxysilane, 5 parts of KH-792 and 0.05 parts of dioctyltin dilaurate were added to the reacto...

Embodiment 2

[0022] Add 50 parts of 2000mPa·s α,ω-dihydroxypolydimethylsiloxane, 35 parts of aluminum hydroxide, 30 parts of aluminum oxide and 15 parts of 50mPa·s polyfunctional hydroxyl silicone resin into 1000L high-speed In a stirred tank, stir in vacuum for 2 hours, the vacuum degree is -0.95MPa, then add 50 parts of 1000mPa·s α,ω-dihydroxypolydimethylsiloxane, 15 parts of hydrogen content of 0.75% Hydrogen-containing silicone oil, 2 parts of 3-methyl-1-pentyn-3-ol, 10 parts of MQ silicone resin treated with fluoroalcohol, 10 parts of octanol, mixed and stirred at high speed for 0.5h, and then vacuum degassed to obtain component A ; Pre-react 100 parts of alkoxy-terminated polydimethylsiloxane with a viscosity of 1000 mPa·s and 15 parts of aminosilane oligomers at a temperature of 100 ° C for 0.5 h, cool to room temperature and mix 20 parts of orthosilicic acid Add propyl ester, 15 parts of methyltriethoxysilane, 5 parts of KH-792 and 0.3 parts of dioctyltin dilaurate into the reactor...

Embodiment 3

[0024] Add 50 parts of 2000mPa·s α,ω-dihydroxypolydimethylsiloxane, 70 parts of alumina and 20 parts of 30mPa·s polyfunctional hydroxyl silicone resin into a 1000L high-speed stirring tank at room temperature, and stir in vacuum 2h, the vacuum degree is -0.95MPa, then cool to room temperature and add 50 parts of 1000mPa·s α,ω-dihydroxypolydimethylsiloxane, 25 parts of hydrogen-containing silicone oil with a hydrogen content of 0.75%, 5 parts 2-Methyl-3-butyn-2-ol, 15 parts of MQ silicone resin treated with fluoroalcohol, 15 parts of octanol, mixed and stirred at high speed for 0.5h, and then vacuum degassed to obtain component A; 100 parts of viscosity was 1000mPa·s alkoxy-terminated polydimethylsiloxane, 20 parts of aminosilane oligomers were pre-reacted at 100°C for 0.5h, and after cooling to room temperature, 30 parts of polyethyl silicate, 20 parts of dimethicone Methyldiethoxysilane, 5 parts of KH-792 and 0.8 parts of dioctyltin dilaurate were added to the reactor, stirre...

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Abstract

The invention discloses a foaming bi-component organic silicon pouring sealant which comprises a component A and a component B with the weight ratio of (5.5-6.5):1. The component A comprises, by weight, 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 1-20 parts of polyhydroxy polysiloxane, 5-50 parts of foaming agents, 20-90 parts of fillers, 0-5 parts of inhibitors, 1-15 parts of fluoro-alcohol treated MQ silicon resin and 1-15 parts of foaming rate-accelerating additives. The component B comprises, by weight, 100 parts of curing agent carriers, 40-60 parts of silane crosslinking agents, 10-20 parts of silane coupling adhesion accelerators and 0.05-1 part of catalysts. The foaming rate-accelerating additives are one or two of diphenyl silanediol and octanol. The invention further discloses a preparation method of the foaming bi-component organic silicon pouring sealant. The bi-component organic silicon pouring sealant has the advantages of simple production technology, foaming uniformity, high foam strength, good flame resistance, excellent storage performance and the like.

Description

technical field [0001] The invention relates to a silicone potting glue and a preparation method thereof, in particular to a two-component silicone potting glue for foaming and a preparation method thereof. Background technique [0002] It is difficult to control the foaming degree and speed of the existing low-density foamed silicone rubber, so the uniformity of foaming in the prepared low-density foamed silicone rubber is relatively poor. Contents of the invention [0003] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a two-component silicone potting compound for foaming, which can solve the problem of foaming uniformity of the two-component silicone potting compound. Another object of the present invention is to provide a method for preparing a two-component silicone potting compound for foaming. [0004] The technical solution of the present invention is as follows: a two-component silicone potting comp...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K13/02C08K3/22C08K5/05C08J9/04
Inventor 段理垒张建忠张雷
Owner 西卡(江苏)工业材料有限公司
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