Patent US4975074A successfully refreshed from Google Patents.
US4301062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diester of 3,5,3',5'-tetrabromo-bisphenol A with halogenated aromatic carboxylic acid
Assignee: Asahi Kasei Corp
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Filing: 1979-10-11
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Granted: 1981-11-17
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Expires: 1999-10-11
Abstract
Abstract A novel diester compound of the formula (I): ##STR1## wherein each of R 1 and R 2 represents a group of the formula (II): ##STR2## wherein n is an integer of 0 to 4; and m an integer of 1 to 5, is found to be capable of imparting excellent flame-retardancy to various inflammable polymeric materials such as polystyrene, polyester, polyamide, polyphenylene oxide, etc. without deleterious effects on other physical properties of such polymeric materials.
Inventors
- 👤 Izumi Yamashita
- 👤 Kazuo Yoshida
- 👤 Yuji Kusumi
- 👤 Kunio Fukuda
- 👤 Kichiya Tazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/105; C08K5/107
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A compound of the formula (I): ##STR8## wherein R 1 and R 2 , which may be identical or different, represent the groups of the formula (II): ##STR9## wherein n is an integer of 1 to 4; and m an integer of 1 to 5.
Claim 2
Dependent Claim
45 words
A compound of the formula (I): ##STR8## wherein R 1 and R 2 , which may be identical or different, represent the groups of the formula (II): ##STR9## wherein n is an integer of 1 to 4; and m an integer of 1 to 5.
Claim 3
Dependent Claim
84 words
A polymeric material improved in flame-retardancy, comprising: (a) at least one inflammable polymer selected from the group consisting of polystyrene, acrylonitrilestyrene resin, acrylonitrile-butadiene-styrene resin, polyphenylene oxide, polyester, polyamide, polyethylene, polypropylene, polyisoprene, polybutadiene, polyacrylate and polycarbonate; and (b) at least one compound of the formula (I): ##STR10## wherein R 1 and R 2 , which may be identical or different, represent the groups of the formula (II): ##STR11## wherein n is an integer of 1 to 4; and m an integer of 1 to 5.
Claim 4
Dependent Claim
84 words
A polymeric material improved in flame-retardancy, comprising: (a) at least one inflammable polymer selected from the group consisting of polystyrene, acrylonitrilestyrene resin, acrylonitrile-butadiene-styrene resin, polyphenylene oxide, polyester, polyamide, polyethylene, polypropylene, polyisoprene, polybutadiene, polyacrylate and polycarbonate; and (b) at least one compound of the formula (I): ##STR10## wherein R 1 and R 2 , which may be identical or different, represent the groups of the formula (II): ##STR11## wherein n is an integer of 1 to 4; and m an integer of 1 to 5.
Claim 5
Dependent Claim
37 words
A polymeric material according to claim 2, comprising 100 parts by weight of the inflammable polymer (a), 5 to 40 parts by weight of the compound (b) and 0 to 15 parts by weight of antimony trioxide.
Claim 6
Dependent Claim
14 words
A polymeric material according to claim 3, wherein the inflammable polymer (a) is polystyrene.
Claim 7
Dependent Claim
14 words
A polymeric material according to claim 3, wherein the inflammable polymer (a) is polyphenyleneoxide.
Claim 8
Dependent Claim
14 words
A polymeric material according to claim 3, wherein the inflammable polymer (a) is polyester.
Claim 9
Dependent Claim
14 words
A polymeric material according to claim 3, wherein the inflammable polymer (a) is polyamide.
Claim 10
Dependent Claim
14 words
A polymeric material according to claim 3, wherein the inflammable polymer (a) is polycarbonate.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |