Patent JPS6253255A successfully refreshed from Google Patents.
US4333809A
Expired / Lapsed
US
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Cross-linkable polycarbonate elastomers, a process for their preparation and use for packaging medicines
Assignee: Bayer AG
•
Filing: 1980-07-22
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Granted: 1982-06-08
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Expires: 2000-07-22
Abstract
Abstract The present invention is directed to cross-linkable, thermoplastically processable, segmented, high molecular weight polycarbonate elastomers, to the process for their preparation and to their use in their cross-linked form.
Inventors
- 👤 Manfred Schreckenberg
- 👤 Dieter Freitag
- 👤 Hans-Heribert Burgdorfer
- 👤 Gunther Lehnert
- 👤 Siegfried Adelmann
- 👤 Hans Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
In the process for the preparation of high molecular weight, thermoplastically processable, segmented, cross-linkable polycarbonate elastomers by known polycarbonate preparation processes, in a heterogeneous or a homogeneous solvent phase system, from "soft segments" which are capable of incorporation and from diphenols, the improvement comprising cocondensing aromatic hydroxyketones having the carbonyl and the hydroxyl groups bonded directly to an aromatic ring in amounts of 1 to 20 mol % relative to the molar amount of said diphenols.
Claim 2
Dependent Claim
76 words
In the process for the preparation of high molecular weight, thermoplastically processable, segmented, cross-linkable polycarbonate elastomers by known polycarbonate preparation processes, in a heterogeneous or a homogeneous solvent phase system, from "soft segments" which are capable of incorporation and from diphenols, the improvement comprising cocondensing aromatic hydroxyketones having the carbonyl and the hydroxyl groups bonded directly to an aromatic ring in amounts of 1 to 20 mol % relative to the molar amount of said diphenols.
Claim 3
Dependent Claim
24 words
The process according to claim 1 wherein said aromatic hydroxyketones comprise 2 to 15 mol % relative to the molar amount of said diphenols.
Claim 4
Dependent Claim
24 words
The process according to claim 1 wherein said aromatic hydroxyketones comprise 3 to 10 mol % relative to the molar amount of said diphenols.
Claim 5
Dependent Claim
11 words
The process according to claim 1 wherein employed are chain terminators.
Claim 6
Dependent Claim
11 words
The process according to claim 1 wherein employed are branching agents.
Claim 7
Dependent Claim
27 words
The process according to claim 1 wherein said soft segments comprise 5 to 70% by weight of said high molecular weight thermoplastically processable, segmented, cross-linkable polycarbonate elastomer.
Claim 8
Dependent Claim
22 words
The cross-linkable polycarbonate elastomer obtained by the process according to claim 1 or 2 or 3 or 4 or 5 or 6.
Claim 9
Dependent Claim
74 words
High molecular weight, thermoplastically processable, segmented, cross-linkable polycarbonate elastomers prepared by known processes for the preparation of polycarbonates, in a heterogeneous or a homogeneous solvent phase system, from "soft segments" which are capable of incorporation and from diphenols characterized in having co-condensed therein aromatic hydroxyketones having the carbonyl and the hydroxyl groups bonded directly to an aromatic ring in amounts of 1 to 20 mol % relative to the molar amount of said diphenols.
Claim 10
Dependent Claim
74 words
High molecular weight, thermoplastically processable, segmented, cross-linkable polycarbonate elastomers prepared by known processes for the preparation of polycarbonates, in a heterogeneous or a homogeneous solvent phase system, from "soft segments" which are capable of incorporation and from diphenols characterized in having co-condensed therein aromatic hydroxyketones having the carbonyl and the hydroxyl groups bonded directly to an aromatic ring in amounts of 1 to 20 mol % relative to the molar amount of said diphenols.
Claim 11
Dependent Claim
28 words
The polycarbonate elastomers of claim 8 wherein said amounts of said aromatic hydroxyketones are between 2 and 15 mol % relative to the molar amount of said diphenols.
Claim 12
Dependent Claim
28 words
The polycarbonate elastomers of claim 8 wherein said amounts of said aromatic hydroxyketones are between 3 and 10 mol % relative to the molar amount of said diphenols.
Claim 13
Dependent Claim
21 words
The polycarbonate elastomers of claim 8 wherein said soft segments comprise between 5 and 70% of the weight of said elastomers.
Claim 14
Dependent Claim
25 words
A process for cross-linking the polycarbonate elastomers of claim 1 or claim 8 by exposure to intense visible light, UV light or high energy radiation.
Claim 15
Dependent Claim
11 words
The cross-linked polycarbonate elastomers obtained by the process of claim 12.
Claim 16
Dependent Claim
22 words
A process for cross-linking the polycarbonate elastomers of claim 7 by exposure to intense visible light, UV light or high energy radiation.
References Cited (Backward Citations)
US3161615A
Cited
US3030335A
Cited
GB965085A
Cited
US3189662A
Cited
US3287442A
Cited
US3518175A
Cited
DE2619831A1
Cited
US4169868A
Cited
DE2636784A1
Cited
DE2650533A1
Cited
US4191705A
Cited
US4216298A
Cited
DE2702626A1
Cited
US4196276A
Cited
DE2712435A1
Cited
US4217297A
Cited
DE2726376A1
Cited
US4217437A
Cited
DE2726416A1
Cited
DE2726417A1
Cited
US4199540A
Cited
DE2746141A1
Cited
US4230548A
Cited
DE2746140A1
Cited
DE2827325A1
Cited
DE2829259A1
Cited
DE2829258A1
Cited
US4221645A
Cited
DE2829256A1
Cited
DE2837526A1
Cited
DE2842004A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |