Patent US4304881A successfully refreshed from Google Patents.
US4304881A
Expired / Lapsed
US
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Alkenyl aromatic resin composition having an excellent impact strength
Assignee: Asahi Kasei Corp
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Filing: 1979-11-29
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Granted: 1981-12-08
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Expires: 1999-11-29
Abstract
Abstract An alkenyl aromatic resin composition having an excellent impact strength, which comprises (I) 100 parts by weight of a rubber-modified alkenyl aromatic resin containing from 2 to 35 wt. % of conjugated diolefin components, or a resinous mixture containing at least a component of the resin thereof; and (II) 1 to 50 parts by weight of a random segment copolymer containing at least a Segment A which is a random copolymer of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio being ranging from 30:70 to 5:95 and at least a Segment B, which is a conjugated diolefin polymer or a random copolymer of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio being ranging from 100:0 to 75:25, the random segment copolymer being characterized by containing; (a) at least 10 wt. % of Segment A based on the total random segment copolymer, (b) at least 20 wt. % of Segment B based on the total random segment copolymer, and (c) at least 60 wt. % of a sum of Segment A and Segment B based on the total random segment copolymer. The resin composition of the present invention can be used to make a variety of useful products, such as film, foam, injection moldings and compression moldings.
Inventors
- 👤 Akira Aoki
- 👤 Toshinori Shiraki
- 👤 Toshio Ibaragi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:59
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
192 words
An alkenyl aromatic resin composition having an excellent impact strength, which comprises (I) 100 parts by weight of a rubber-modified alkenyl aromatic resin containing from 2 to 35 wt. % of conjugated diolefin components, or a resinous mixture containing at least a component of the resin thereof; and (II) 1 to 50 parts by weight of a random segmented copolymer containing at least a Segment A, which is a random copolymer segment of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio ranging from 30:70 to 5:95, respectively, and at least a Segment B, which is either a conjugated diolefin polymer segment or a random copolymer segment of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio ranging from 100:0 to 75:25, respectively, the random segmented copolymer being characterized by containing; (a) at least 10 wt. % of Segment A based on the total random segmented copolymer, (b) at least 20 wt. % of Segment B based on the total random segmented copolymer, and (c) the sum of Segment A and Segment B being at least 60 wt. % based on the total random segmented copolymer.
Claim 2
Dependent Claim
192 words
An alkenyl aromatic resin composition having an excellent impact strength, which comprises (I) 100 parts by weight of a rubber-modified alkenyl aromatic resin containing from 2 to 35 wt. % of conjugated diolefin components, or a resinous mixture containing at least a component of the resin thereof; and (II) 1 to 50 parts by weight of a random segmented copolymer containing at least a Segment A, which is a random copolymer segment of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio ranging from 30:70 to 5:95, respectively, and at least a Segment B, which is either a conjugated diolefin polymer segment or a random copolymer segment of a conjugated diolefin and a vinyl-substituted aromatic compound with a weight ratio ranging from 100:0 to 75:25, respectively, the random segmented copolymer being characterized by containing; (a) at least 10 wt. % of Segment A based on the total random segmented copolymer, (b) at least 20 wt. % of Segment B based on the total random segmented copolymer, and (c) the sum of Segment A and Segment B being at least 60 wt. % based on the total random segmented copolymer.
Claim 3
Dependent Claim
29 words
A composition according to claim 1, wherein the random segmented copolymer has a content of bound vinyl-substituted aromatic compound in the range of from 30 to 65 wt. %.
Claim 4
Dependent Claim
45 words
A composition according to claim 1, wherein the rubber-modified alkenyl aromatic resin containing from 2 to 35 wt. % of conjugated diolefin components, is at least one selected from the group consisting of rubber-modified polystyrene, acrylonitrile-butadienestyrene copolymer, methylmethacrylate-butadienestyrene copolymer, and conjugated diolefin-styrene block copolymer resin.
Claim 5
Dependent Claim
55 words
A composition according to claim 1, wherein the resinous mixture is a mixture of a rubber-modified alkenyl aromatic resin containing 2 to 35 wt. % conjugated diolefin components with at least one thermoplastic resin selected from the group consisting of a polyphenylene ether resin, polystyrene, polyethylene, polypropylene, polyvinyl chloride, nylon, polyacetal, polycarbonate, polysulfone, and polyester.
Claim 6
Dependent Claim
30 words
A composition according to claim 1, wherein the conjugated diolefin is at least one selected from the group consisting of 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 3-butyl-1,3-octadiene, 1-phenyl-1,3-butadiene, 1,3-hexadiene, 1,3-octadiene, and 4-ethyl-1,3-hexadiene.
Claim 7
Dependent Claim
31 words
A composition according to claim 1, wherein the vinyl-substituted aromatic compound is at least one selected from the group consisting of styrene, o-methylstyrene, p-methylstyrene, m-methylstyrene, α-methylstyrene, p-ethylstyrene, 2,4-dimethylstyrene, vinylnaphthalene, and vinylanthracene.
Claim 8
Dependent Claim
27 words
A composition, further comprising 1-50 parts by weight of an additive, based on 100 parts by weight of the alkenyl aromatic resin composition according to claim 1.
Claim 9
Dependent Claim
40 words
A composition according to claim 7, wherein the additive is at least one selected from the group consisting of flame retardants; glass fiber; glass beads; organic fibers; pigments; dyestuffs; inorganic reinforcing agents; organic reinforcing agents; metal powder; woodmeal; other extenders.
References Cited (Backward Citations)
US3833687A
Cited
US3835200A
Cited
US3907930A
Cited
US4075285A
Cited
US4080403A
Cited
US4166055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |