US4731406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant low-smoking rubber composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1986-12-16
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Granted: 1988-03-15
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Expires: 2006-12-16
Abstract
Abstract Vulcanizates of so-called EPM and EPDM rubber compositions can be imparted with greatly improved flame retardancy and emit a greatly decreased volume of smoke in burning when the rubber composition is compounded with a conventional flame retardant agent of aluminum or magnesium hydroxide together with a polymer of an acrylic acid ester and an organopolysiloxane in combination or a copolymer composed of the moieties of these two kinds of monomeric units in a limited weight proportion.
Inventors
- 👤 Kunio Itoh
- 👤 Tsutomu Nakamura
- 👤 Ken-ichi Takita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:28
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08L9/00; C08L2201/00; C08L2201/02; C08L2205/00; C08L2205/03; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
136 words
A flame-retardant and low-smoking rubber composition which comprises: (a) 100 parts by weight of a rubbery copolymer of monomers comprising ethylene and propylene; (b) from 10 to 150 parts by weight of a combination of (b-1) from 20 to 80% by weight of a polymer of an acrylic acid ester and (b-2) from 80 to 20% by weight of an organopolysiloxane, or from 10 to 150 parts by weight of (b-3) a copolymer essentially composed of from 20 to 80% by weight of a moiety of an acryclic acid ester and from 80 to 20% by weight of a moiety of an organopolysiloxane; and (c) aluminum hydroxide, magnesium hydroxide or a combination thereof in an amount in the range from 30 to 150% by weight based on the total amount of the components (a) and (b).
Claim 2
Dependent Claim
136 words
A flame-retardant and low-smoking rubber composition which comprises: (a) 100 parts by weight of a rubbery copolymer of monomers comprising ethylene and propylene; (b) from 10 to 150 parts by weight of a combination of (b-1) from 20 to 80% by weight of a polymer of an acrylic acid ester and (b-2) from 80 to 20% by weight of an organopolysiloxane, or from 10 to 150 parts by weight of (b-3) a copolymer essentially composed of from 20 to 80% by weight of a moiety of an acryclic acid ester and from 80 to 20% by weight of a moiety of an organopolysiloxane; and (c) aluminum hydroxide, magnesium hydroxide or a combination thereof in an amount in the range from 30 to 150% by weight based on the total amount of the components (a) and (b).
Claim 3
Dependent Claim
35 words
The flame-retardant and low-smoking rubber composition as claimed in claim 1 wherein the copolymer as the component (a) is a copolymer of ethylene and propylene or a copolymer of ethylene, propylene and a diene monomer.
References Cited (Backward Citations)
US3793288A
Cited
US4353997A
Cited
US4373048A
Cited
US4430470A
Cited
US4420580A
Cited
US4533687A
Cited
US4560719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |