Jeram Edward M. (Burnt Hills NY) Ward Brian J. (Valley Falls NY)
출원인 / 주소
General Electric Company (Waterford NY 02)
인용정보
피인용 횟수 :
17인용 특허 :
0
초록▼
The present invention provides an improved heat curable silicone composition, having increased tear strength, oil resistance, and reduced compression set, comprising (A) a blend containing (1) a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend having a viscosity of ab
The present invention provides an improved heat curable silicone composition, having increased tear strength, oil resistance, and reduced compression set, comprising (A) a blend containing (1) a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend having a viscosity of about 5,000 to about 500,000 centipoise at 25°C., and (2) a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend having a viscosity of about 8,000,000 to about 100,000,000 centipoise at 25°C; (B) an organopolysiloxane resin copolymer; (C) an organic peroxide catalyst; (D) a filler; and (E) an organohydrogenpolysiloxane.
대표청구항▼
An improved heat curable silicone composition, having increased tear strength and reduced compression set, comprising by weight: (A) 100 parts of a blend comprising by weight: (1) from about 5 to about 50% of a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend, wherein
An improved heat curable silicone composition, having increased tear strength and reduced compression set, comprising by weight: (A) 100 parts of a blend comprising by weight: (1) from about 5 to about 50% of a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend, wherein the vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend has a viscosity of about 5,000 to about 500,000 centipoise at 25°C.; and (2) from about 50 to about 95% of a vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend, wherein the vinyl-containing organopolysiloxane or vinyl-containing organopolysiloxane blend has a viscosity of about 8,000,000 to about 100,000,000 centipoise at 25°C.; (B) from about 1 to about 30 parts based on component (A) of an organopolysiloxane resin copolymer comprising (1) R3SiO½units and SiO2 units where R is selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation with a ratio of R3SiO½units to SiO2 units ranging from about 0.5:1 to about 1.5:1, wherein the copolymer contains from about 0.5 to 10 weight percent vinyl groups; or (2) R3SiO½units, SiO2 units, and R2SiO2/2 units, where R is as defined above, where the ratio of R3SiO½units to SiO2 units is from about 0.5:1 to about 1.5:1, and the R2SiO2/2 units are present in an amount of from about 1 to 70 mole percent based on the total number of moles of siloxy units in the copolymer, and where the resinous copolymer contains from about 0.5 to 10.0 weight percent vinyl groups, or (3) mixtures of the units of (1) and (2); (C) from about 0.1 to about 5.0 parts based on component (A) of an organic peroxide free radical curing catalyst, (D) from about 5.0 to about 200 parts based on component (A) of a filler; and (E) from 0.1 to 10 parts based on component (A), of an organohydrogenpolysiloxane having a hydrogen content ranging from about 0.05 to 2.0 percent by weight and having a viscosity ranging from about 5 to about 500 centipoise at 25°C.
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이 특허를 인용한 특허 (17)
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