Room temperature curable organopolysiloxane composition

A polysiloxane, organo-based technology, applied in the field of organopolysiloxane compositions, can solve the problems of unacceptable, negative impact of working environment, expensive industrial applications, etc., to maintain adhesion and firm adhesion Effect

Inactive Publication Date: 2009-11-18
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the disilane alkane compound described and used in JP-A S64-60656 is highly volatile due to its low molecular weight and emits an odor, giving a negative influence on the working environment when preparing and curing the composition
Also, described in JP-A 2003-221506 has C 4 -C 10 Alkylene disilane alkane compounds are impractical and unacceptable for industrial applications due to their high cost due to the scarce value of the diene compounds from which they are prepared

Method used

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  • Room temperature curable organopolysiloxane composition
  • Room temperature curable organopolysiloxane composition
  • Room temperature curable organopolysiloxane composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Add 100 parts of colloidal calcium carbonate ( 300, Maruo Calcium Co., Ltd.). The mixture was homogeneously ground on a three-roll mill to form a base compound.

[0068] By combining 25 parts of polydimethylsiloxane with a viscosity of 5,000 mPa·s at both ends terminated with trimethylsiloxy groups, 10 parts of carbon black, 30 parts of bis(alkoxysilylalkyl) dimethicone Siloxane I (in Synthesis Example 1), 3 parts of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 0.1 part of dimethyltin dineodecanoate were mixed to prepare a curing agent. The base compound and curing agent were mixed at a weight ratio of 10:1 to obtain an RTV organopolysiloxane composition.

Embodiment 2

[0074] An RTV organopolysiloxane composition was prepared as in Example 1, except that 5 parts of N,N'-bis[3-(trimethoxysilyl)propyl]ethylenediamine was used instead of 3 parts of N-β-( Aminoethyl)-γ-aminopropyltrimethoxysilane, and the amount of dimethyltin dineodecanoate was changed from 0.1 part to 0.05 part.

Embodiment 3

[0078] An RTV organopolysiloxane composition was prepared as in Example 1, except that 3 parts of 3-(N-aminomethylbenzylamine)propyltrimethoxysilane and 2 parts of N,N,N',N' were used - Tetramethylguanidine instead of 3 parts of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

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Abstract

An RTV organopolysiloxane composition is provided comprising (A) a diorganopolysiloxane capped at both ends of its molecular chain with hydroxysilyl, alkoxysilyl or alkoxyalkoxysilyl and having a viscosity of 20-1,000,000 mPa-s at 25 DEG C, (B) a bis(alkoxysilylalkyl)disiloxane compound, and (C) a curing catalyst. The composition is fast curable into a silicone rubber which establishes a firm adhesion to substrates with an active surface such as float glass and maintains the adhesion even in a harsh environment as immersed in hot water over a long term.

Description

technical field [0001] This invention relates to organopolysiloxane compositions that cure to silicone rubber at room temperature, and more particularly to RTV organopolysiloxane compositions that cure rapidly and cure to adherent glass, heat reflective Glass, metal and plastics, as well as products that maintain long-lasting adhesion even in harsh environments. Background technique [0002] RTV organopolysiloxane compositions are known in the art, which include diorganopolysiloxanes, alkoxysilanes, containing Amino-based alkoxysilanes and curing catalysts. Although these compositions adhere quickly to the substrate when cured, the problem remains that the cured coating will detach from the substrate when submerged in water for a long time, especially from substrates with active surfaces such as float Glass or patterned glass separates. They cannot be used as sealing materials for structural bonding and secondary sealing of double-glazed elements where long-term bonding r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K5/57C08K5/5419C08K5/5445C08K5/31
CPCC08K5/5419C08L83/14C08L83/04
Inventor 岩崎功坂本隆文木村恒雄
Owner SHIN ETSU CHEM CO LTD
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