Patent US4173561A successfully refreshed from Google Patents.
US4173561A
Expired / Lapsed
US
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Flame retardant polymer composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1978-01-04
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Granted: 1979-11-06
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Expires: 1998-01-04
Abstract
Abstract Resin compositions excellent in both flame retardation and weather durability, comprising (1) a styrene resin, (2) a halogen-containing flame retarder such as decabromodiphenyl ether and (3) an inorganic hydrate compound such as diatomaceous earth or a magnesium compound such as magnesium hydroxide and oxide.
Inventors
- 👤 Minoru Tabana
- 👤 Noriyuki Sekine
- 👤 Tatsuyuki Mitsuno
- 👤 Akira Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:17
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0066
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A resin composition comprising (1) a styrene resin selected from the group consisting of polystyrene, rubber-modified polystyrene, polymethyl styrene, styrene-butadiene copolymers, styrene-acrylonitrile copolymers and styrene-butadiene-acrylonitrile terpolymers, (2) 3 to 40 parts by weight based on 100 parts by weight of the styrene resin of a halogen-containing flame retarder selected from the group consisting of tetrabromobisphenol A, tetrabromophthalic anhydride, hexabromobenzene, pentabromotoluene, pentabromophenol, tris(2,3-dibromopropyl)phosphate, tris(2-chloro-3-bromopropyl)phosphate, tribromophenyl allyl ether, tribromophenyl 2,3-dibromopropyl ether, tribromophenyl 1,3-dibromoisobutyl ether, octabromodiphenyl ether, decabromodiphenyl ether, octabromobiphenyl, pentachloropentacyclodecane and hexabromocyclododecane, and (3) as an inorganic compound 0.1 to 10 parts by weight based on 100 parts by weight of the syrene resin of (a) at least one inorganic hydrate compound selected from alumina hydrate and talc, or (b) at least one magnesium compound selected from magnesium hydroxide, magnesium oxide and basic magnesium carbonate, provided that the halogen-containing flame retarder is decabromodiphenyl ether in an amount of 11 to 30 parts by weight based on 100 parts by weight of the styrene resin when the inorganic compound is the magnesium compound.
Claim 2
Dependent Claim
170 words
A resin composition comprising (1) a styrene resin selected from the group consisting of polystyrene, rubber-modified polystyrene, polymethyl styrene, styrene-butadiene copolymers, styrene-acrylonitrile copolymers and styrene-butadiene-acrylonitrile terpolymers, (2) 3 to 40 parts by weight based on 100 parts by weight of the styrene resin of a halogen-containing flame retarder selected from the group consisting of tetrabromobisphenol A, tetrabromophthalic anhydride, hexabromobenzene, pentabromotoluene, pentabromophenol, tris(2,3-dibromopropyl)phosphate, tris(2-chloro-3-bromopropyl)phosphate, tribromophenyl allyl ether, tribromophenyl 2,3-dibromopropyl ether, tribromophenyl 1,3-dibromoisobutyl ether, octabromodiphenyl ether, decabromodiphenyl ether, octabromobiphenyl, pentachloropentacyclodecane and hexabromocyclododecane, and (3) as an inorganic compound 0.1 to 10 parts by weight based on 100 parts by weight of the syrene resin of (a) at least one inorganic hydrate compound selected from alumina hydrate and talc, or (b) at least one magnesium compound selected from magnesium hydroxide, magnesium oxide and basic magnesium carbonate, provided that the halogen-containing flame retarder is decabromodiphenyl ether in an amount of 11 to 30 parts by weight based on 100 parts by weight of the styrene resin when the inorganic compound is the magnesium compound.
Claim 3
Dependent Claim
32 words
The composition according to claim 1, wherein the composition further comprises 0.1 to 5 parts by weight based on 100 parts by weight of the styrene resin of an ultraviolet ray absorber.
Claim 4
Dependent Claim
28 words
The composition according to claim 2, wherein the ultraviolet ray absorber is at least one member selected from 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, phenyl salicylate and 4-octylphenyl salicylate.
Claim 5
Dependent Claim
22 words
The composition according to claim 1, wherein the composition further comprises a flame retarding assistant selected from antimony trioxide and zirconium dioxide.
Claim 6
Dependent Claim
88 words
The composition according to claim 1, wherein the composition comprises 11 to 30 parts by weight based on 100 parts by weight of the styrene resin of decabromodiphenyl ether as the halogen-containing flame retarder and 0.1 to 10 parts by weight based on 100 parts by weight of the styrene resin of the magnesium compound as defined in claim 1 as the inorganic compound, and further comprises 0.1 to 5 parts by weight based on 100 parts by weight of the styrene resin of an ultraviolet ray absorber.
Claim 7
Dependent Claim
15 words
The composition according to claim 1, wherein the halogen-containing flame retarder is tribromophenyl 1,3-dibromoisobutyl ether.
Claim 8
Dependent Claim
29 words
The composition according to claim 2, wherein the halogen-containing flame retarder is one member selected from tetrabromobisphenol A, hexabromobenzene and decabromodiphenyl ether, and the ultraviolet ray absorber is 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole.
Claim 9
Dependent Claim
23 words
The composition according to claim 5, wherein the magnesium compound is magnesium hydroxide or magnesium oxide, and the ultraviolet ray absorber is 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole.
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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |