Kazutoshi Fujioka

US Patent:

53915887, Feb 21, 1995

Filed:

Dec 14, 1993

Appl. No.:

8/166077

Inventors:

Takafumi Sakamoto - Annaka, JP
Masatoshi Arai - Annaka, JP
Kazutoshi Fujioka - Pittsburgh PA

Assignee:

Shin-Etsu Chemical Co., Ltd. - Tokyo

International Classification:

C08F 246

US Classification:

522 99

Abstract:

Curable compositions comprising (A) an organopolysiloxane of the following general formula (1): ##STR1## wherein R. sup. 1 is hydrogen or methyl, R. sup. 2 and R. sup. 3 are monovalent hydrocarbon groups, and R. sup. 4 is a divalent organic group, (B) a silane having an. alpha. -silylester group, (C) a photoinitiator, and (D) a curing catalyst. The compositions are both photo-curable and room-temperature-curable. When cured by irradiation with light, the compositions give cured products having good rubber properties.

US Patent:

54947502, Feb 27, 1996

Filed:

May 10, 1994

Appl. No.:

8/240472

Inventors:

Kazutoshi Fujioka - Pittsburgh PA
Takashi Kondou - Annaka, JP
Takeo Yoshida - Annaka, JP

Assignee:

Shin-Etsu Chemical Co., Ltd. - Tokyo

International Classification:

B32B 2520
C08K 910
C08L 8304

US Classification:

42840221

Abstract:

A heat-curable silicone elastomer composition comprising (A) a thermoplastic resin containing a platinum catalyst and a hydrosilylation reaction retarding agent, (B) an organopolysiloxane having at least two unsaturated aliphatic hydrocarbon groups bonded to silicon atoms in its molecule, and (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in its molecule. The composition is excellent in storage stability. That is, even when stored for a long time, the composition has good stability at room temperature and retains curability at high temperatures.