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Normal temperature cured organic polysiloxane composition

A polysiloxane and room temperature curing technology, which is applied in the field of room temperature curable organopolysiloxane compositions, can solve the problems of reducing catalysts and failing to obtain sufficient mechanical properties, and achieve the effect of long operating life

Active Publication Date: 2006-09-06
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 organopolysiloxanes having both ends capped with silanol groups, trisiloxanes having two alkoxy groups, tri- or tetraalkoxy The combination of silane and its partial hydrolyzate and curing catalyst, but since any of them uses alkoxysilane as crosslinking agent, in order to ensure sufficient usable time, the amount of catalyst must be reduced, so it cannot be fully obtained. Composition of mechanical properties

Method used

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  • Normal temperature cured organic polysiloxane composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 100 parts by mass of dimethylpolysiloxane with a viscosity of 700 mPa·s terminated with hydroxyl groups at both ends, and 25 parts by mass of dimethyl polysiloxane with a viscosity of 900 mPa·s terminated with trimethoxysilyl groups through siloxane bonds. Add 0.2 parts by mass of tin dioctoate to the base polysiloxane, mix until uniform, and prepare composition 1.

Embodiment 2

[0083] 35 parts by mass of dimethyl polysiloxane with a viscosity of 50,000 mPa·s terminated with hydroxyl groups, 40 parts by mass of colloidal calcium carbonate, and 25 parts by mass of both ends with a viscosity of 100 mPa·s terminated with a trimethylsiloxane group. s of dimethyl polysiloxane, 10 mass parts of dimethyl polysiloxane with a viscosity of 900 mPa·s whose two ends are terminated by trimethoxysilane groups through siloxane bonds, and 0.2 mass parts of tin dioctoate , and mix until uniform to prepare composition 4.

Embodiment 3

[0085] In Example 2, Composition 5 was prepared in the same manner as in Example 2, except that 1 part by mass of dioctyltin dilaurate was used instead of 0.2 parts by mass of tin dioctoate.

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Abstract

The invention provides an organopolysiloxane compound used as sealing substance, bonding agent, coating agent and embedding agent and characterized by long operational time, no happen of unsuitable condition caused by volatile silane. The compound is characterized in that: it comprises (A) 100 units (by weight) of organopolysiloxane with hydroxyl group sealing the two ends; (B) organopolysiloxane 1-100 units by weight, R1 is alkyl with same or different carbon number of 1-6,or alkoxy with 2-10carbon number; R2 is same or different substituted or unsubstituted hydrocarbon radical; m is integral number between 1-3; k is integral number 10 or that larger than 10); (C) tin catalyst 0.01-10 units by weight.

Description

technical field [0001] The present invention relates to a room temperature useful as a polysiloxane-based sealant, adhesive, coating or potting agent that can ensure a very long pot life and that the reactive silane compound hardly volatilizes when uncured. Curable organopolysiloxane composition. Background technique [0002] Condensation-curing polysiloxane-based sealants, adhesives, coating agents, and potting agents are used in many fields such as construction, electrical electronics, conveyors, electrical installation parts, and home appliances. Generally, condensation-curable polysiloxane-based sealant, adhesive, coating agent, or potting agent compositions used for these applications use, as a crosslinking agent, one molecule having at least 3 silicon-bonded A silane compound with a hydrolyzable group on the atom and / or a partial hydrolyzate thereof. Specifically, there are alkyltrimethoxysilane, alkyltributyryloxysilane, alkyltriacetoxysilane, alkyltriisopropionylox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/14C08K3/36C08K3/26
Inventor 木村恒雄今井启介荒木正
Owner SHIN ETSU CHEM IND CO LTD
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