Patent US4146587A successfully refreshed from Google Patents.
US4146587A
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Segment polymers derived from aromatic vinyl-diene block polymer anion and aromatic polycarbonate
Assignee: Bayer AG
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Filing: 1978-03-15
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Granted: 1979-03-27
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Expires: 1998-03-15
Abstract
Abstract A segment polymer comprising units derived from a linear living aromatic vinyl-diene block polymer anion and from an aromatic polycarbonate in which at least 50% of the polycarbonate consist of structural units represented by the following formula (I): ##STR1## wherein X denotes C 1 -C 5 alkylene or alkylidene, AND WHICH HAS THERMOPLASTIC AND ELASTOMERIC PROPERTIES.
Inventors
- 👤 Manfred Beck
- 👤 Jochen Schnetger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:22
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/027; C08G64/00; C08G64/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
Segment polymers obtainable by the reaction of linear living aromatic vinyl-diene block polymer anions with an aromatic polycarbonate of which at least 50% by weight consists of structural units represented by the following formula (I): ##STR4## wherein X denotes C 1 -C 5 alkylene or alkylidene.
Claim 2
Dependent Claim
46 words
Segment polymers obtainable by the reaction of linear living aromatic vinyl-diene block polymer anions with an aromatic polycarbonate of which at least 50% by weight consists of structural units represented by the following formula (I): ##STR4## wherein X denotes C 1 -C 5 alkylene or alkylidene.
Claim 3
Dependent Claim
35 words
Segment polymers according to claim 1, characterised in that the aromatic vinyl block has a molecular weight of from 5,000 to 250,000 and the diene block has a molecular weight of from 10,000 to 500,000.
Claim 4
Dependent Claim
35 words
Segment polymers according to claim 1, characterised in that the aromatic vinyl block has a molecular weight of from 10,000 to 50,000 and the diene block has a molecular weight of from 20,000 to 80,000.
Claim 5
Dependent Claim
20 words
Segment polymers according to claim 1, characterised in that the molecular weights of the polycarbonates are from 10,000 to 200,000.
Claim 6
Dependent Claim
20 words
Segment polymers according to claim 1, characterised in that the molecular weights of the polycarbonates are from 15,000 to 100,000.
Claim 7
Dependent Claim
23 words
Segment polymers according to claim 1, characterised in that the molar ratio of block polymer anion to polycarbonate is from 0.5:1 to 250:1.
Claim 8
Dependent Claim
23 words
Segment polymers according to claim 1, characterised in that the molar ratio of block polymer anion to polycarbonate is from 20:1 to 1:1.
Claim 9
Dependent Claim
59 words
A process for the preparation of segment polymers according to claim 1 characterised in that living linear aromatic vinyl-diene block polymer anions are reacted in an inert solvent with an aromatic polycarbonate of which at least 50% by weight consist of structural units of the following formula (I): ##STR5## wherein X denotes C 1 -C 5 alkylene or alkylidene.
Claim 10
Dependent Claim
22 words
A process according to claim 8, characterised in that the reaction is carried out at temperatures of from 20° to 80° C.
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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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |