US4533687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant rubber composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1984-01-31
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Granted: 1985-08-06
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Expires: 2004-01-31
Abstract
Abstract The invention provides a highly flame-retardant polyolefin-based rubber composition free from the problem of the formation of toxic or corrosive gases and a large volume of smoke by burning of conventional flame-retardant rubber compositions impregnated with a large amount of a halogen-containing flame retardant agent. The inventive rubber composition comprises (a) a synthetic rubber of polyolefin type, (b) an organopolysiloxane resin which is preferably formed of monofunctional siloxane units and tetrafunctional siloxane units in a molar ratio of 0.6/1.0 to 2.0/1.0, (c) red phosphorus and (d) aluminum hydroxide or magnesium hydroxide in a specified proportion.
Inventors
- 👤 Kunio Itoh
- 👤 Toshimichi Oshima
- 👤 Tsutomu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:15
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/16; C08L83/00; C08L83/04; C08L2312/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A flame-retardant polyolefin-based rubber composition which comprises: (a) 100 parts by weight of a synthetic rubber of polyolefin type; (b) 1 to 50 parts by weight of an organopolysiloxane resin formed from monofunctional siloxane units represented by the formula R 3 SiO 0 .5, in which R is a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group, and tetrafunctional siloxane units of the formula SiO 2 in a molar ratio in the range from 0.6/1.0 to 2.0/1.0; (c) from 1 to 20 parts by weight of red phosphorus; and (d) from 5 to 200 parts by weight of aluminum hydroxide or magnesium hydroxide.
Claim 2
Dependent Claim
104 words
A flame-retardant polyolefin-based rubber composition which comprises: (a) 100 parts by weight of a synthetic rubber of polyolefin type; (b) 1 to 50 parts by weight of an organopolysiloxane resin formed from monofunctional siloxane units represented by the formula R 3 SiO 0 .5, in which R is a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group, and tetrafunctional siloxane units of the formula SiO 2 in a molar ratio in the range from 0.6/1.0 to 2.0/1.0; (c) from 1 to 20 parts by weight of red phosphorus; and (d) from 5 to 200 parts by weight of aluminum hydroxide or magnesium hydroxide.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein the organopolysiloxane resin contains a flame-retardancy improving effective amount of functional groups which are reactive with the polyolefin-based synthetic rubber of component (a).
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein the functional groups are selected from the group consisting of hydrogen atoms directly bonded to the silicon atoms, vinyl, allyl, acrylic, methacrylic and mercaptopropyl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |