US4218545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic rubber blends of polycarbonates and block copolymers
Assignee: Bayer AG
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Filing: 1977-05-22
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Granted: 1980-08-19
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Expires: 1997-05-22
Abstract
Abstract Mixtures of (1) 99 to 1% of one or more segment copolymers of alternating linear or branched segments A and B wherein A are polymer blocks of aromatic vinyl compounds with Tg>20° C. (hard segment) and B are polymer blocks containing polymerized conjugated dienes with Tg>0° C. (soft segment), and (2) 1 to 99% of one or more aromatic polycarbonates in which the linear chains consist to an extent of at least 50% of structural units of the formula ##STR1## wherein X=C 1 -C 5 alkylene or alkylidene.
Inventors
- 👤 Volker Serini
- 👤 Manfred Beck
- 👤 Leo Morbitzer
- 👤 Gert Humme
- 👤 Jochen Schnetger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L69/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A mixture comprising: (a) 99 to 1% by weight of one or more segment copolymers including partly or totally hydrogenated segment polymers of alternating linear or branched segments A and B wherein A comprises a hard segment polymeric block of aromatic vinyl compounds and B comprises a soft segment polymeric block containing polymerised conjugated dienes, said hard segment having Tg higher than 20° C. and said soft segment having Tg lower than 0° C., and (b) 1 to 99% by weight of one or more aromatic polycarbonates in which the linear chains comprise at least 50% of structural units of the general formula ##STR5## wherein X is C 1 -C 5 alkylene or alkylidene.
Claim 2
Dependent Claim
114 words
A mixture comprising: (a) 99 to 1% by weight of one or more segment copolymers including partly or totally hydrogenated segment polymers of alternating linear or branched segments A and B wherein A comprises a hard segment polymeric block of aromatic vinyl compounds and B comprises a soft segment polymeric block containing polymerised conjugated dienes, said hard segment having Tg higher than 20° C. and said soft segment having Tg lower than 0° C., and (b) 1 to 99% by weight of one or more aromatic polycarbonates in which the linear chains comprise at least 50% of structural units of the general formula ##STR5## wherein X is C 1 -C 5 alkylene or alkylidene.
Claim 3
Dependent Claim
21 words
A mixture as claimed in claim 1 wherein the aromatic polycarbonate consists entirely of structural units of the general formula (I).
Claim 4
Dependent Claim
21 words
A mixture as claimed in claim 1 wherein the aromatic polycarbonate has a molecular weight average of from 15,000 to 60,000.
Claim 5
Dependent Claim
34 words
A mixture as claimed in claim 1 wherein the segment copolymer comprises hard segments having a molecular weight of between 10,000 and 50,000 and soft segments having a molecular weight between 20,000 and 80,000.
Claim 6
Dependent Claim
12 words
A mixture as claimed in claim 1 which also comprises an oil.
Claim 7
Dependent Claim
27 words
A mixture as claimed in claim 1, comprising 90 to 65% by weight of the segment copolymer and 10 to 35% by weight of the aromatic polycarbonate.
Claim 8
Dependent Claim
31 words
A mixture as claimed in claim 6 wherein the segment copolymer contains from 20 to 50% by weight of hard segments and from 80 to 50% by weight of soft segments.
Claim 9
Dependent Claim
29 words
A mixture as claimed in claim 1, comprising from 15 to 80% by weight of the segment copolymer and from 85 to 20% by weight of the aromatic polycarbonate.
Claim 10
Dependent Claim
31 words
A mixture as claimed in claim 8, wherein the segment copolymer contains from 30 to 80% by weight of hard segments and from 70 to 20% by weight of soft segments.
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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |