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Room-temperature-curable organopolysiloxane composition, and moulded product comprising cured product of said room-temperature-curable organopolysiloxane composition

An organosilicon compound, polysiloxane technology, applied in chemical instruments and methods, other chemical processes, coatings, etc., can solve the problem that room temperature-curable polyorganosiloxane compositions, low reactivity, and curability have not yet been found. Insufficient and other problems, to achieve the effect of excellent rapid curing, good storage stability and durability, and excellent rapid curing

Active Publication Date: 2017-02-22
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the dealcoholized type has insufficient curability due to its low reactivity with moisture in the air compared with other known types such as deoxime type, deacetate type, and acetone type.
[0007] Here, although room-temperature-curable polyorganosiloxane compositions capable of imparting excellent rapid curing properties and excellent moisture resistance to cured products have been developed, no room-temperature-curable polyorganosiloxane compositions useful for industrial production have been found. Silicone composition

Method used

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  • Room-temperature-curable organopolysiloxane composition, and moulded product comprising cured product of said room-temperature-curable organopolysiloxane composition
  • Room-temperature-curable organopolysiloxane composition, and moulded product comprising cured product of said room-temperature-curable organopolysiloxane composition
  • Room-temperature-curable organopolysiloxane composition, and moulded product comprising cured product of said room-temperature-curable organopolysiloxane composition

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Experimental program
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Effect test

Embodiment

[0093] Hereinafter, the present invention will be specifically described by showing synthesis examples, examples, and comparative examples, but the present invention is not limited to the following examples. In addition, in the following specific examples, "part" means "part by mass". In addition, the viscosity is shown as the measured value measured by using the rotational viscometer at 25 degreeC.

Synthetic example

[0095] A method for synthesizing a silicon-containing compound having two alkoxysilyl-1,2-vinylene groups on the same silicon atom as component B is as follows.

Synthetic example 1

[0097] Diacetylene dimethyl silane 35.0g (0.323mol), chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) 0.10 g of 0.5 wt % toluene solution and 50 mL of toluene were added to a 500 mL four-necked split flask equipped with a mechanical stirrer, a thermometer and a dropping funnel, and 83.01 g (0.678 mol) of trimethoxysilane was added dropwise. Thereafter, after stirring at 85° C. for 6 hours, distillation was carried out to obtain 106.2 g (90% recovery) of the silicon compound [bis(trimethoxysilyl-1,2-vinylidene group) represented below. ) dimethylsilane]. and to investigate the silicon compound 1 The curve of the HNMR spectrum, thereby being unambiguously confirmed as the bis(trimethoxysilyl-1,2-vinylidene)dimethylsilane (the following compound) of the target product (trans:cis=8:1 ). This reaction is shown in the following general formula [3].

[0098]

[0099] 1 H-NMR (400MHz, C 6 D. 6 , δ (ppm)): 0.00 (s, 6H), 3.36 (s, 18H), 6.47 (d, 2H), 7.10 (d, 2H)

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Abstract

This room-temperature-curable organopolysiloxane composition includes: component (A); 0.1-30 parts by mass of component (B) per 100 parts by mass of component (A); and 0.001-20 parts by mass of component (D) per 100 parts by mass of component (A). Component (A) is an organopolysiloxane represented by general formula (1) (in general formula (1): R1 represents hydrogen, or a substituted or unsubstituted C1-20 monovalent hydrocarbon group; the plurality of R1s may be the same or different; and n represents an integer of at least 1). Component (B) is an organic silicon compound which is represented by general formula (2), and which is characterized by having two silyl-vinylene groups provided to the same silicon atom (in general formula (2): R1 represents hydrogen, or a substituted or unsubstituted C1-20 monovalent hydrocarbon group; the plurality of R1s may be the same or different; R2 represents a substituted or unsubstituted C1-20 alkyl group, or a substituted or unsubstituted C3-20 cycloalkyl group; and a represents an integer from 1 to 3). Component (D) is a curing catalyst.

Description

technical field [0001] The present invention relates to a room-temperature-curable organopolysiloxane composition and an elastomer-like molded article (cured silicone rubber) obtained by curing the room-temperature-curable organopolysiloxane composition. Room-temperature-curable organopolysiloxane composition having a hydrolyzable silyl group and an organosilicon compound having a structure in which two silicon atoms are cross-linked through a carbon-carbon double bond as a curing agent (cross-linking agent), and the room-temperature-curable organopolysiloxane composition A molded product obtained by curing a permanent organopolysiloxane composition. Background technique [0002] Conventionally, various types of room-temperature-curable organopolysiloxane compositions are known, which are cured at room temperature to form elastomers (silicone rubber) by contacting with moisture in the air and crosslinking by condensation reaction. . In particular, the type that cures by re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K5/5425C09D183/06C09J183/06C09K3/10
CPCC09K3/10C08G77/16C08K5/57C08L83/00C08K5/5425C08L83/04C09D183/04C09J183/04C08L83/06C09D183/06C09J183/06C08G77/38C08L2205/025
Inventor 山口贵大坂本隆文
Owner SHIN ETSU CHEM CO LTD
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