US4769415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition
Assignee: Dainippon Plastics Co Ltd
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Filing: 1987-06-09
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Granted: 1988-09-06
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Expires: 2007-06-09
Abstract
Abstract A resin composition comprising a block copolymer which comprises an intermediate block of a hydrogenated conjugated diene polymer and terminal blocks of an aromatic vinyl compound polymer, the composition being characterized in that the composition comprises: (a) 20 to 90 parts by weight of a block copolymer having terminal blocks in an amount of about 10 to about 20% by weight based on the copolymer (a), and (b) 80 to 10 parts by weight of a block copolymer mixed with the copolymer (a) and having terminal blocks in an amount of about 25 to about 35% by weight based on the copolymer (b).
Inventors
- 👤 Masahiro Hotta
- 👤 Tadasu Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S525/00; Y10S525/932; Y10S525/94
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A resin composition comprising a blend of (a) 20 to 90 parts by weight of a first block copolymer having terminal blocks in an amount of about 10-20% by weight based on the weight of the first block copolymer, and (b) 80 to 10 parts by weight of a second block copolymer having terminal blocks in an amount of about 25-35% by weight based on the weight of the second block copolymer, said first and second block copolymers each comprising an intermediate block of a hydrogenated conjugated diene polymer having a number average molecular weight of about 10,000-300,000 and terminal blocks of an aromatic vinyl polymer having a number average molecular weight of about 5,000-125,000, the intermediate blocks of said block copolymers being at least 95% hydrogenated, wherein the total of said first block copolymer and said second block copolymer is equal to 100 parts by weight.
Claim 2
Dependent Claim
147 words
A resin composition comprising a blend of (a) 20 to 90 parts by weight of a first block copolymer having terminal blocks in an amount of about 10-20% by weight based on the weight of the first block copolymer, and (b) 80 to 10 parts by weight of a second block copolymer having terminal blocks in an amount of about 25-35% by weight based on the weight of the second block copolymer, said first and second block copolymers each comprising an intermediate block of a hydrogenated conjugated diene polymer having a number average molecular weight of about 10,000-300,000 and terminal blocks of an aromatic vinyl polymer having a number average molecular weight of about 5,000-125,000, the intermediate blocks of said block copolymers being at least 95% hydrogenated, wherein the total of said first block copolymer and said second block copolymer is equal to 100 parts by weight.
Claim 3
Dependent Claim
19 words
The resin composition of claim 1 in which the hydrogenated conjugated diene polymer is a hydrogenated polybutadiene or polyisoprene.
Claim 4
Dependent Claim
18 words
The resin composition of claim 1 in which the aromatic vinyl compound polymer is polystyrene, poly-α-methylstyrene or poly-p-methylstyrene.
Claim 5
Dependent Claim
30 words
The resin composition of claim 1 containing 25 to 80 parts by weight of the first block copolymer and 75 to 20 parts by weight of the second block copolymer.
Claim 6
Dependent Claim
17 words
The resin composition of claim 1 which is molded or extruded to form a sheet or tube.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |