US4082715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of polycarbonates
Assignee: Unibra SA
•
Filing: 1975-11-13
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Granted: 1978-04-04
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Expires: 1995-11-13
Abstract
Abstract A moulding composition which comprises a polycarbonate polymer, a plasticizer for said polymer, and a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups.
Inventors
- 👤 Jean-Pierre Mercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:47
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/40; Y; Y10; Y10S; Y10S260/00; Y10S260/35
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
A moulding composition comprising a polycarbonate polymer from 2.5 to 20% by weight of a plasticizer for said polycarbonate, and from 0.01 to 20% by weight of a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups.
Claim 2
Dependent Claim
46 words
A moulding composition comprising a polycarbonate polymer from 2.5 to 20% by weight of a plasticizer for said polycarbonate, and from 0.01 to 20% by weight of a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein said nucleating agent is a copolymer of an olefinic monomer and an unsaturated acid.
Claim 4
Dependent Claim
14 words
A composition according to claim 2 wherein said olefinic monomer is ethylene or propylene.
Claim 5
Dependent Claim
19 words
A composition according to claim 1 wherein said nucleating agent is a copolymer of styrene and an unsaturated acid.
Claim 6
Dependent Claim
15 words
A composition according to claim 1 wherein said nucleating agent is an alkali metal salt.
Claim 7
Dependent Claim
32 words
A composition according to claim 1 wherein said plasticizer is an ester selected from the group consisting of the esters of benzene mono-, di-, or tri-carboxylic acids and esters of polyhydroxy alcohols.
Claim 8
Dependent Claim
34 words
A composition according to claim 6 wherein said plasticizer is selected from the group consisting of the esters of alcohols without a hydrogen atom in the β position with respect to a hydroxy group.
Claim 9
Dependent Claim
17 words
A composition according to claim 1 comprising from 1 to 10% by weight of said nucleating agent.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 wherein the mean grain size of said nucleating agent is lower than 10 microns.
Claim 11
Dependent Claim
58 words
A polymer material comprising a mixture of a polycarbonate polymer, from 2.5 to 20% by weight of a plasticizer for said polymer, and from 0.01 to 20% by weight of a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups, said mixture being in at least partly crystalline form.
Claim 12
Dependent Claim
58 words
A polymer material comprising a mixture of a polycarbonate polymer, from 2.5 to 20% by weight of a plasticizer for said polymer, and from 0.01 to 20% by weight of a finely divided nucleating agent selected from the group consisting of metal salts of polymers carrying lateral carboxylic groups, said mixture being in at least partly crystalline form.
References Cited (Backward Citations)
US3186961A
Cited
US3965064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |