US3965064A
Expired / Lapsed
US
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Process for the crystallization of polycarbonates and products obtained
Assignee: Unibra SA
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Filing: 1974-10-29
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Granted: 1976-06-22
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Expires: 1994-10-29
Abstract
Abstract The invention concerns a process for crystallizing a polycarbonate polymer which consists in incorporating to said polycarbonate polymer a finely divided nucleating agent and/or a plasticizer for said polycarbonate polymer, and crystallizing the mixture thus obtained at a temperature higher than the vitreous transition temperature. The semi-crystalline polymer material obtained can be reinforced by adding inorganic fibers.
Inventors
- 👤 Jean Mercier
- 👤 Francis Gallez
- 👤 Roger Legras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08G; C08G64/00; C08G64/40; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/0008; C08K5/0083; C08K5/04; C08K5/09; C08K5/10; C08K5/36; C08K5/41; Y; Y10; Y10S; Y10S260/00; Y10S260/35
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
67 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof and a plasticizer are incorporated into said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 2
Dependent Claim
67 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof and a plasticizer are incorporated into said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 3
Dependent Claim
36 words
A process according to claim 1 wherein said polycarbonate polymer is admixed with 2.5 to 20% by weight of a plasticizer for said polycarbonate polymer selected from the group consisting of esters of benzene tricarboxylic acids.
Claim 4
Dependent Claim
37 words
A process according to claim 1 wherein said bisphenol polycarbonate polymer is admixed with 1 to 50% by weight of a plasticizer selected from the group consisting of esters of benzene-carboxylic acids, adipic acid, and phosphoric acid.
Claim 5
Dependent Claim
23 words
A process according to claim 1 wherein said organic acid is selected from the group consiting of benzene-carboxylic acids and benzene sulfinic acids.
Claim 6
Dependent Claim
73 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is stable at the processing temperature and which is selected from the group consisting of the inorganic salts of carbonic acid, is incorporated into said polycarbonate material, together with 2.5 to 20% by weight of a plasticizer compatible with said polycarbonate polymer, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 7
Dependent Claim
73 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is stable at the processing temperature and which is selected from the group consisting of the inorganic salts of carbonic acid, is incorporated into said polycarbonate material, together with 2.5 to 20% by weight of a plasticizer compatible with said polycarbonate polymer, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 8
Dependent Claim
70 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is selected from the group consisting of the alkaline and alkaline-earth metal carbonates, is incorporated into said polycarbonate material, together with a plasticizer selected from the group consisting of the esters of benzene-carboxylic acids, phosphoric acid and adipic acid, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 9
Dependent Claim
70 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is selected from the group consisting of the alkaline and alkaline-earth metal carbonates, is incorporated into said polycarbonate material, together with a plasticizer selected from the group consisting of the esters of benzene-carboxylic acids, phosphoric acid and adipic acid, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 10
Dependent Claim
26 words
A process according to claim 6, wherein said mixture is crystallized by maintaining it at a temperature between 90° and 225°C for 0.5 to 30 minutes.
Claim 11
Dependent Claim
36 words
A process according to claim 5, wherein the mixture is heated at a temperature from 180°C to 300°C, moulded, and is maintained during subsequent cooling at a temperature higher than 90°C for 0.5 to 30 minutes.
Claim 12
Dependent Claim
57 words
A process for crystallizing a bisphenol polycarbonate polymer wherein 0.01 to 20% by weight of a nucleating agent which is selected from the group consisting of the inorganic salts of benzene-carboxylic acids and benzene-sulfinic acids is incorporated into said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 13
Dependent Claim
57 words
A process for crystallizing a bisphenol polycarbonate polymer wherein 0.01 to 20% by weight of a nucleating agent which is selected from the group consisting of the inorganic salts of benzene-carboxylic acids and benzene-sulfinic acids is incorporated into said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 14
Dependent Claim
53 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent which is selected from the group consisting of inorganic salts of benzene-carboxylic acids is incorporated into said polycarbonate polymer, to the exclusion of a plasticizer, and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 15
Dependent Claim
53 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent which is selected from the group consisting of inorganic salts of benzene-carboxylic acids is incorporated into said polycarbonate polymer, to the exclusion of a plasticizer, and the mixture thus obtained is crystallized at a temperature higher than its glass transition temperature.
Claim 16
Dependent Claim
54 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is selected from the group consisting of the alkaline and alkaline-earth metal salts of a benzene-carboxylic acid is incorporated in said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 17
Dependent Claim
54 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a finely divided nucleating agent which is selected from the group consisting of the alkaline and alkaline-earth metal salts of a benzene-carboxylic acid is incorporated in said polycarbonate polymer and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 18
Dependent Claim
23 words
A process according to claim 11, wherein the proportion of said nucleating agent in said mixture is between 0.01 and 2% by weight.
Claim 19
Dependent Claim
59 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent which is selected from the inorganic salts of benzene-carboxylic acids is incorporated into said polymer, in a proportion from 0.01 to 20% by weight, and the mixture thus obtained is heated to the melted phase, moulted and cooled to a temperature lower than the glass transition temperature.
Claim 20
Dependent Claim
59 words
A process for crystallizing a bisphenol polycarbonate polymer wherein a nucleating agent which is selected from the inorganic salts of benzene-carboxylic acids is incorporated into said polymer, in a proportion from 0.01 to 20% by weight, and the mixture thus obtained is heated to the melted phase, moulted and cooled to a temperature lower than the glass transition temperature.
Claim 21
Dependent Claim
42 words
A process according to claim 13, wherein said nucleating agent is an inorganic salt of a benzene-carboxylic acid comprising on the benzene ring at least one atom, alkyl or alcoxy radical with 1 to 6 carbon atoms, oxhydryl radical or amino radical.
Claim 22
Dependent Claim
23 words
A process according to claim 13 wherein the proportion of said nucleating agent in said mixture is between 0.05 and 1% by weight.
Claim 23
Dependent Claim
66 words
A process for crystallizing a bisphenol polycarbonate polymer, wherein a finely divided nucleating agent which is selected from the group consisting of the inorganic salts of oxalic, malonic, adipic, citric, tricarballylic, azelic, and cinnamic acids is incorporated into said polycarbonate material, together with a plasticizer compatible with said polycarbonate polymer, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 24
Dependent Claim
66 words
A process for crystallizing a bisphenol polycarbonate polymer, wherein a finely divided nucleating agent which is selected from the group consisting of the inorganic salts of oxalic, malonic, adipic, citric, tricarballylic, azelic, and cinnamic acids is incorporated into said polycarbonate material, together with a plasticizer compatible with said polycarbonate polymer, and the mixture thus obtained is crystallized at a temperature higher than the glass transition temperature.
Claim 25
Dependent Claim
47 words
A moulding composition comprising a bisphenol polycarbonate polymer, a plasticizer for said polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof.
Claim 26
Dependent Claim
47 words
A moulding composition comprising a bisphenol polycarbonate polymer, a plasticizer for said polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof.
Claim 27
Dependent Claim
68 words
A moulding composition comprising a bisphenol polycarbonate polymer, from 1 to 50% by weight of a plasticizer selected from the group consisting of esters of benzene-carboxylic acids, phosphoric acid, and adipic acid, and from 0.01 to 20% by weight of a nucleating agent selected from the group consisting of the inorganic salts of carbonic acid, benzene-carboxylic acids, benzene-sulfinic acids, oxalic, malonic, adipic, citric, tricarballylic, azelic, and cinnemic acids.
Claim 28
Dependent Claim
68 words
A moulding composition comprising a bisphenol polycarbonate polymer, from 1 to 50% by weight of a plasticizer selected from the group consisting of esters of benzene-carboxylic acids, phosphoric acid, and adipic acid, and from 0.01 to 20% by weight of a nucleating agent selected from the group consisting of the inorganic salts of carbonic acid, benzene-carboxylic acids, benzene-sulfinic acids, oxalic, malonic, adipic, citric, tricarballylic, azelic, and cinnemic acids.
Claim 29
Dependent Claim
43 words
A mouling composition comprising a bisphenol polycarbonate polymer and a nucleating agent dispersed in said polymer and selected from the group consisting of inorganic salts of benzene-carboxylic acids, said nucleating agent being a finely divided form and having a melting point above 180°C.
Claim 30
Dependent Claim
43 words
A mouling composition comprising a bisphenol polycarbonate polymer and a nucleating agent dispersed in said polymer and selected from the group consisting of inorganic salts of benzene-carboxylic acids, said nucleating agent being a finely divided form and having a melting point above 180°C.
Claim 31
Dependent Claim
52 words
A polymer material comprising a mixture of a bisphenol polycarbonate polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of the metal salts of carbonic acid, metal salts of organic acids and mixtures thereof, said mixture being in semi-crystalline form.
Claim 32
Dependent Claim
52 words
A polymer material comprising a mixture of a bisphenol polycarbonate polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of the metal salts of carbonic acid, metal salts of organic acids and mixtures thereof, said mixture being in semi-crystalline form.
Claim 33
Dependent Claim
11 words
A polymer material according to claim 20 further comprising reinforcing fibers.
Claim 34
Dependent Claim
17 words
A polymer material according to claim 20 having a crystallinity ratio higher than 30% throughout the mass.
Claim 35
Dependent Claim
14 words
A polymer material according to claim 20 having a melting point higher than 268°C.
Claim 36
Dependent Claim
56 words
A polymer material comprising a mixture of a bisphenol polycarbonate polymer, a plasticizer for said polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof, said mixtures being in semi-crystalline form.
Claim 37
Dependent Claim
56 words
A polymer material comprising a mixture of a bisphenol polycarbonate polymer, a plasticizer for said polymer and a nucleating agent in finely divided form, having a melting point above 180°C and selected from the group consisting of metal salts of carbonic acid, metal salts of organic acids and mixtures thereof, said mixtures being in semi-crystalline form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |