Title:
LIQUID-ADDITION-CURABLE FLUOROSILICONE COMPOSITION, SILICONE RUBBER, AND MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2023/008042
Kind Code:
A1
Abstract:
[Problem] Under the above-mentioned situations, the present invention addresses the problem of providing: a liquid-addition-curable fluorosilicone composition which has a small compression permanent strain value after curing by heating, retains the mechanical strength thereof, and can be used suitably particularly for injection molding; a fluorosilicone rubber which is produced by curing the composition by heating; and a molded article which is produced from the fluorosilicone rubber. [Solution] Provided is an addition-curable fluorosilicone composition which has a liquid form at 23°C and is characterized by comprising: (A) an organopolysiloxane that is represented by general formula (1) (wherein R1's independently represent a group selected from an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms and an aralkyl group having 7 to 12 carbon atoms, x represents an integer of 1 to 10, m represents an integer of 0 to 100, and n represents an integer of 1 to 800, in which 5 ≦ m+n ≦ 800) and has a viscosity of 100 to 500,000 mPa∙s at 25°C; (B) an organohydrogenpolysiloxane having at least two silicon-atom-bound hydrogen atoms per molecule, in such an amount that the number of hydrogen atoms each bound to a silicon atom in the component (B) becomes 0.5 to 10 per one silicon-atom-bound vinyl group in the component (A); (C) an addition reaction catalyst, in a catalytic amount; and (D) a reinforcing silica filler that is surface-treated with an organosilicon compound represented by general formula (2) (in formula (2), R3's independently represent a group selected from an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms and an aralkyl group having 7 to 12 carbo atoms; R2's independently represent a group represented by the R3 or a 3,3,3-trifluoropropyl group, in which at least one group among the R2's is a 3,3,3-trifluoropropyl group; and p represents an integer satisfying the formula: 1 ≦ p ≦ 20), in an amount of 10 to 60 parts by mass relative to 100 parts by mass of the component (A).
Inventors:
SHUDO SHIGEKI (JP)
KATO NOBU (JP)
HARA TATSUEI (JP)
OGURA KENTARO (JP)
KATO NOBU (JP)
HARA TATSUEI (JP)
OGURA KENTARO (JP)
Application Number:
PCT/JP2022/025551
Publication Date:
February 02, 2023
Filing Date:
June 27, 2022
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08L83/08; C08K3/08; C08K3/36; C08K9/06; C08L83/05
Foreign References:
| JP2013047290A | 2013-03-07 | |||
| JPS5980464A | 1984-05-09 | |||
| JP2006022212A | 2006-01-26 | |||
| JP2013047290A | 2013-03-07 |
Attorney, Agent or Firm:
MATSUI Mitsuo et al. (JP)
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