US3862082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant silicone rubber compositions
Assignee: Momentive Performance Materials Japan LLC
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Filing: 1973-10-31
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Granted: 1975-01-21
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Expires: 1993-10-31
Abstract
Abstract Platinum in the form of a platinum compound and titanium dioxide treated with an organosilane or an organosiloxane are added to an ordinary siloxane rubber composition to improve the flame retardant property thereof.
Inventors
- 👤 Masayuki Hatanaka
- 👤 Ryooichi Mahekawa
- 👤 Hideo Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:33
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/04; C08K3/00; C08K3/01; C08K3/016; C08K5/00; C08K5/0008; C08K5/0066; C08K9/00; C08K9/04; C08K9/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
26 words
The silicone rubber composition according to claim 1, wherein said titanium dioxide is fumed titanium dioxide having an average particle diameter of less than 0.1 micron.
Claim 2
Dependent Claim
42 words
The siloxane rubber composition according to claim 1, wherein said titanium dioxide is prepared by admixing fumed titanium dioxide and diphenyldiethoxy silane at a weight ratio of 1:1, and heat treating the resulting mixture at a temperature of 250*C for 1 hour.
Claim 3
Dependent Claim
68 words
The silicone rubber composition according to claim 1, wherein said treated titanium dioxide is prepated by admixing fumed titanium dioxide with an alkoxy group end-blocked silicone oil containing 30 mole % of diphenylsiloxane units and 70 mole % of dimethylsiloxane units and having a viscosity of 80 centistokes, at a weight ratio of 1:1, and heat treating the resulting mixture at a temperature of 250*C for 4 hours.
Claim 4
Dependent Claim
47 words
The silicone rubber composition according to claim 1, wherein said treated titanium dioxide is prepared by admixing fumed titanium dioxide with a trimethylsilyl group endblocked dimethyl polysiloxane, at a weight ratio of 1:1, and heat treating the resulting mixture at a temperature of 250*C for 4 hours.
Claim 5
Dependent Claim
38 words
The silicone rubber composition according to claim 1, wherein said platinum containing compound is selected from the group consisting of chloroplatinic acid, chloroplatinic acid-vinylsiloxane complex, chloroplatinic acid-octyl alcohol complex and a solution of chloroplatinic acid in iso-propyl alcohol.
Claim 6
Dependent Claim
27 words
The silicone rubber composition according to claim 1, wherein said curing agenT is selected from the group consisting of 2,4-dichlorobenzoyl peroxide, dicumyl peroxide and ditertiary butyl peroxide.
Claim 7
Dependent Claim
19 words
The silicone rubber composition according to claim 1, which further comprises a linear siloxane acting as a process aid.
Claim 8
Dependent Claim
22 words
The silicone rubber composition according to claim 1, wherein said reinforcing inorganic filler comprises a fume silica treated with a polydimethyl-siloxane oil.
Claim 9
Dependent Claim
25 words
The silicone rubber composition according to claim 1, wherein said reinforcing inorganic filler comprises a fume silica which is not treated with a polydimethyl-siloxane oil.
Claim 10
Dependent Claim
31 words
The silicone rubber composition according to claim 1, wherein said organosiloxane utilized to treat said titanium dioxide contains a unit selected from the group consisting of triorganosiloxane, diorganosiloxane and monoorganosiloxane units.
Claim 11
Dependent Claim
30 words
The silicone rubber composition according to claim 1, wherein said organo-silane utilized to treat said titanium dioxide is a member selected from the group consisting of triorganosilyl, diorganosilyl and monoorganosilyl.
Claim 12
Dependent Claim
26 words
The silicone rubber composition according to claim 1, wherein said organosilane or organosiloxane utilized to treat said titanium dioxide contains silicon bonded methyl and/or phenyl groups.
Claim 13
Dependent Claim
46 words
The silicone rubber composition according to claim 1, which further comprises at least one finely divided material selected from the group consisting of quartz, calcium carbonate, calcium zirconate, zirconate silicate diatomaceous earth, iron oxide, untreated titanium oxide, carbon black, heat resistant additives, process acid and antioxidants.
Claim 14
Dependent Claim
20 words
Silicone rubber prepared by curing the silicone rubber composition of claim 1 at a temperature of 150*C for 1 hour.
References Cited (Backward Citations)
US3539530A
Cited
US3692737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |