Organic polysiloxane composition solidifying at room temperature

A polysiloxane, room temperature curing technology, used in other chemical processes, chemical instruments and methods, adhesives, etc., can solve the problem of inability to obtain mechanical properties, and achieve the effect of long operation time

Inactive Publication Date: 2011-08-10
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Japanese Patent No. 3210424 (Patent Document 11) discloses an organopolysiloxane whose ends are terminated with silanol groups, a trisiloxane having two alkoxy groups, a tri- or tetra-alkoxysilane, and A composition composed of its partial hydrolyzate and a curing catalyst, but because alkoxysilane is used as a crosslinking agent, the amount of catalyst is reduced in order to ensure a sufficient pot life, so sufficient mechanical properties cannot be obtained

Method used

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  • Organic polysiloxane composition solidifying at room temperature
  • Organic polysiloxane composition solidifying at room temperature
  • Organic polysiloxane composition solidifying at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 100 parts by mass of dimethyl polysiloxane with a viscosity of 700 mPa·s blocked with hydroxyl groups at both ends, and a dimethyl polysiloxane with a viscosity of 700 mPa·s blocked with a trimethoxysilyl group connected by a silethylene group Composition 1 was prepared by adding 0.2 part by mass of tin dioctoate to 25 parts by mass of dimethylpolysiloxane and mixing uniformly.

Embodiment 2

[0075] Except that in Example 1, the addition amount of dimethylpolysiloxane with a viscosity of 700 mPa·s blocked with a trimethoxysilyl group through the connection of silethylene groups was 50 parts by mass. , Composition 2 was prepared in the same manner as in Example 1.

Embodiment 3

[0081] 35 parts by mass of dimethyl polysiloxane with a viscosity of 50,000 mPa·s blocked with hydroxyl groups at both ends, 40 parts by mass of colloidal calcium carbonate, and a compound with a viscosity of 100 mPa·s blocked with trimethylsiloxy groups at both ends Add 25 parts by mass of dimethylpolysiloxane and 20 parts by mass of dimethylpolysiloxane with a viscosity of 30,000 mPa·s blocked by trimethoxysilyl groups connected by silethylene groups at both ends Composition 4 was prepared by mixing 0.2 parts by mass of tin dioctoate evenly.

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Abstract

The invention provides a room temperature curable organopolysiloxane composition that facilitates to secure a very long pot life, is free from a trouble caused by a silane monomer component derived from a volatile crosslinker, can be also used suitably as a two liquid type RTV, and further can change into a cured product having a good rubber elasticity. The room temperature curable organopolysiloxane composition is characterized by comprising: (A) 100 pts. by mass of an organopolysiloxane with the both ends of the molecular chain blocked with hydroxy groups, (B) 1-200 pts. by mass of a polysiloxane having a hydrolyzable silyl group through an alkylene bond in the molecule, and (C) 0.01-10 pts. by mass of a catalyst.

Description

technical field [0001] The present invention relates to a room temperature curable organopolysiloxane composition, which can maintain a very long working time, and there is basically no volatilization of reactive silane compounds when uncured, and is suitable for sealants, adhesives, coatings agent or casting encapsulant. technical background [0002] Condensation-curing silicone-based sealants, adhesives, coating agents, and potting encapsulant compositions are used in many fields such as construction, electrical electronics, transportation aircraft, electrical parts, and home appliances. Generally, in the condensation-curable silicone-based sealant, adhesive, coating agent, and potting encapsulant composition used in these applications, a hydrolyzable group having at least three silicon atoms in one molecule is used. Agglomerated organosilicon compounds and / or their partial hydrolyzates are used as crosslinking agents. It essentially refers to trifunctional hydrolyzable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/14C08K3/36C09D183/14C09J183/14C09K3/10
Inventor 木村恒雄
Owner SHIN ETSU CHEM IND CO LTD
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