US4499238A
Expired / Lapsed
US
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Thermoplastic resin products having pearl-like luster
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1982-05-21
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Granted: 1985-02-12
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Expires: 2002-05-21
Abstract
Abstract PCT No. PCT/JP82/00186 Sec. 371 Date Jan. 24, 1983 Sec. 102(e) Date Jan. 24, 1983 PCT Filed May 21, 1982 PCT Pub. No. WO82/04058 PCT Pub. Date Nov. 25, 1982.Various resin products having beautiful pearl-like pattern or luster and excellent mechanical strength such as impact strength and hinging properties are produced by molding a mixture of styrene-butadiene block copolymer containing 10 to 35 wt % butadiene and 65 to 90 wt % styrene, showing resinous properties, and having a specific block form and crystalline polypropylene (content of the former copolymer: 25 to 95 wt %).
Inventors
- 👤 Nobutoshi Iwata
- 👤 Kiyoshi Fukushima
- 👤 Shinji Fujino
- 👤 Takeshiro Yamada
- 👤 Hideyuki Hao
- 👤 Shigeo Tanaka
- 👤 Tatsuyuki Mitsuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S525/00; Y10S525/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A resin composition for manufacturing thermoplastic resin products having a pearl-like luster and consisting essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene.
Claim 2
Dependent Claim
121 words
A resin composition for manufacturing thermoplastic resin products having a pearl-like luster and consisting essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene.
Claim 3
Dependent Claim
19 words
A resin composition according to claim 1, wherein the content of said styrene-butadiene copolymer is 30 to 90 wt%.
Claim 4
Dependent Claim
133 words
A resin molding the surface of which has pearl-like luster and which is produced from a resin composition obtained from the blending of a mixture consisting essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene.
Claim 5
Dependent Claim
133 words
A resin molding the surface of which has pearl-like luster and which is produced from a resin composition obtained from the blending of a mixture consisting essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene.
Claim 6
Dependent Claim
20 words
A resin molding according to claim 3, wherein the content of said styrene-butadiene block copolymer is 30 to 90 wt%.
Claim 7
Dependent Claim
43 words
A resin molding according to claim 3, wherein said resin composition consisting essentially of said styrene-butadiene block copolymer and crystalline polypropylene is obtained by blending the two components after mixing them in a solid state and then molding them into a pelletized state.
Claim 8
Independent Claim
141 words
A method of manufacturing a resin molding having pearl-like luster comprising the steps of: mixing in a solid state, and then, blending the resultant mixture which consists essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene then molding the blended mixture into pellets.
Claim 9
Independent Claim
141 words
A method of manufacturing a resin molding having pearl-like luster comprising the steps of: mixing in a solid state, and then, blending the resultant mixture which consists essentially of: 25 to 95 wt% of a styrene-butadiene block copolymer having a butadiene content of 10 to 35 wt% and having a block form expressed by a general formula {(S-B)n}xY (where S represents styrene or a polymer block consisting essentially of styrene; B, butadiene or a polymer block consisting essentially of butadiene; n, an integer ranging between 1 to 5; Y, the residue of a polyfunctional coupling agent used in the form of a radial copolymer; and x, an integer of at least more than 3, representing the number of the functional groups of said polyfunctional coupling agent); and 5 to 75 wt% of crystalline polypropylene then molding the blended mixture into pellets.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |