Patent US3877046A successfully refreshed from Google Patents.
Patent US4025485A successfully refreshed from Google Patents.
US4025485A
Expired / Lapsed
US
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Organopolysiloxane compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1976-07-20
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Granted: 1977-05-24
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Expires: 1996-07-20
Abstract
Abstract The organopolysiloxane compositions comprising a dimethylpolysiloxane, an organohydrogenpolysiloxane, a silica filler, zinc carbonate, ceric oxide, and a platinum compound. They are useful for producing electrically insulating materials and fire-resistant materials with excellent heat stability and flame retardancy.
Inventors
- 👤 Iehiro Kodama
- 👤 Yoshiaki Kudo
- 👤 Takahide Kobori
- 👤 Tokue Kozima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:58
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/295; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08K3/34; C08K3/36; C08L; C08L83/00; C08L83/04; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
An organopolysiloxane composition comprising (A) 100 parts by weight of a mixture consisting of (a) an organopolysiloxane having at least two vinyl groups directly bonded to the silicon atoms in a molecule and (b) an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to the silicon atoms, the amount of the organohydrogenpolysiloxane being sufficient to provide at least one and a half hydrogen atoms directly bonded to the silicon atoms per vinyl group of organopolysiloxane (a), (B) from 5 to 50 parts by weight of a silica filler, (C) from 0.5 to 40 parts by weight of zinc carbonate, (D) from 0.05 to 10 parts by weight of ceric oxide, and (E) a catalytic amount of platinum or a platinum compound.
Claim 2
Dependent Claim
122 words
An organopolysiloxane composition comprising (A) 100 parts by weight of a mixture consisting of (a) an organopolysiloxane having at least two vinyl groups directly bonded to the silicon atoms in a molecule and (b) an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to the silicon atoms, the amount of the organohydrogenpolysiloxane being sufficient to provide at least one and a half hydrogen atoms directly bonded to the silicon atoms per vinyl group of organopolysiloxane (a), (B) from 5 to 50 parts by weight of a silica filler, (C) from 0.5 to 40 parts by weight of zinc carbonate, (D) from 0.05 to 10 parts by weight of ceric oxide, and (E) a catalytic amount of platinum or a platinum compound.
Claim 3
Dependent Claim
25 words
The organopolysiloxane composition as claimed in claim 1 wherein component (a) has a viscosity of from 200 to 100,000 centistokes as measured at 25° C.
Claim 4
Dependent Claim
23 words
The organopolysiloxane composition as claimed in claim 1 wherein component (a) is a dimethylpolysiloxane terminated at both molecular chain ends with dimethylvinylsilyl groups.
Claim 5
Dependent Claim
32 words
The organopolysiloxane composition as claimed in claim 1 wherein component (B) is contained in an amount of from 10 to 30 parts by weight per 100 parts by weight of component (A).
Claim 6
Dependent Claim
24 words
The organopolysiloxane composition as claimed in claim 1 wherein component (B) has a specific surface area of from 100 to 400 m 2 /g.
Claim 7
Dependent Claim
32 words
The organopolysiloxane composition as claimed in claim 1 wherein component (C) is contained in an amount of from 2 to 20 parts by weight per 100 parts by weight of component (A).
Claim 8
Dependent Claim
22 words
The organopolysiloxane composition as claimed in claim 1 wherein component (C) has an average particle diameter of not larger than 10 μm.
Claim 9
Dependent Claim
32 words
The organopolysiloxane composition as claimed in claim 1 wherein component (D) is contained in an amount of from 0.2 to 2.0 parts by weight per 100 parts by weight of component (A).
Claim 10
Dependent Claim
18 words
A flame retardant material comprising an inorganic fabric material impregnated with the cured organopolysiloxane composition of claim 1.
Claim 11
Dependent Claim
19 words
The flame retardant material as claimed in claim 9 wherein said inorganic fabric material is a glass fiber article.
Claim 12
Dependent Claim
18 words
The flame retardant material as claimed in claim 9 wherein said inorganic fabric material is an asbestos cloth.
Claim 13
Dependent Claim
18 words
The flame retardant material as claimed in claim 10 wherein said glass fiber article is a glass sleeve.
Claim 14
Dependent Claim
18 words
The flame retardant material as claimed in claim 10 wherein said glass fiber article is a glass cloth.
Claim 15
Dependent Claim
145 words
An organopolysiloxane composition comprising (A) 100 parts by weight of a mixture consisting of (a) a dimethylpolysiloxane terminated at both molecular chain ends with dimethylvinylsilyl groups having a viscosity in the range between 200 and 100,000 centistokes at 25° C., and (b) organohydrogenpolysiloxane containing in a molecule at least three hydrogen atoms directly bonded to the silicon atoms in an amount sufficient to provide 1.5 to 30 hydrogen atoms directly bonded to the silicon atoms per vinyl group of dimethylpolysiloxane (a), (B) 10 to 30 parts by weight of a silica filler with a specific surface area of from 100 to 400 m 2 /g, (C) 2 to 20 parts by weight of zinc carbonate having an average particle diameter of not larger than 10 μm, (D) 0.2 to 2.0 parts by weight of ceric oxide, and (E) a catalytic amount of a platinum compound.
Claim 16
Dependent Claim
145 words
An organopolysiloxane composition comprising (A) 100 parts by weight of a mixture consisting of (a) a dimethylpolysiloxane terminated at both molecular chain ends with dimethylvinylsilyl groups having a viscosity in the range between 200 and 100,000 centistokes at 25° C., and (b) organohydrogenpolysiloxane containing in a molecule at least three hydrogen atoms directly bonded to the silicon atoms in an amount sufficient to provide 1.5 to 30 hydrogen atoms directly bonded to the silicon atoms per vinyl group of dimethylpolysiloxane (a), (B) 10 to 30 parts by weight of a silica filler with a specific surface area of from 100 to 400 m 2 /g, (C) 2 to 20 parts by weight of zinc carbonate having an average particle diameter of not larger than 10 μm, (D) 0.2 to 2.0 parts by weight of ceric oxide, and (E) a catalytic amount of a platinum compound.
References Cited (Backward Citations)
US3692732A
Cited
US3821140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |