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US4137221A
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Heat-curable and solvent-soluble ester group-containing polymer compositions and process for their preparation
Assignee: Teijin Ltd
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Filing: 1975-07-07
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Granted: 1979-01-30
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Expires: 1995-07-07
Abstract
Abstract A heat-curable and solvent-soluble ester group-containing polymer composition is prepared by the steps of:
Inventors
- 👤 Shigeyoshi Hara
- 👤 Tateyoshi Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:22
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C08L; C08L67/00; C08J2367/00; C08J2367/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A process for producing a heat-curable and solvent-soluble ester group-containing polymer composition which comprises (1) reacting a highly polymerized linear aromatic polyester having an intrinsic viscosity (η), measured on an o-chlorophenol solvent at 35° C., of above 0.3 (component 1) with 10 to 70 mole%, based on the total amount, in moles, of dibasic acid contained in the polyester, of a diaryl carbonate (component 2) to depolymerize the polyester and form a solvent-soluble low molecular weight polyester (component A) in which at least 30 mole% of the entire terminal groups are aryl carboxylate groups, and (2) (i) mixing or (ii) partially reacting component A with a monomeric polyfunctional compound (component B) containing at least two reactive groups selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group.
Claim 2
Dependent Claim
135 words
A process for producing a heat-curable and solvent-soluble ester group-containing polymer composition which comprises (1) reacting a highly polymerized linear aromatic polyester having an intrinsic viscosity (η), measured on an o-chlorophenol solvent at 35° C., of above 0.3 (component 1) with 10 to 70 mole%, based on the total amount, in moles, of dibasic acid contained in the polyester, of a diaryl carbonate (component 2) to depolymerize the polyester and form a solvent-soluble low molecular weight polyester (component A) in which at least 30 mole% of the entire terminal groups are aryl carboxylate groups, and (2) (i) mixing or (ii) partially reacting component A with a monomeric polyfunctional compound (component B) containing at least two reactive groups selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group.
Claim 3
Dependent Claim
47 words
The process according to claim 1 wherein component 1 is a polyester obtained by the reaction of a dicarboxylic acid or its functional derivatives, at least 80 mole% of which consists of terephthalic acid, with a glycol containing 2 to 6 carbon atoms or its functional derivatives.
Claim 4
Dependent Claim
44 words
The process according to claim 2 wherein said diaryl carbonate (component 2) is diphenyl carbonate or its derivatives expressed by the following formula ##STR17## wherein R is a methyl group, a halogen atom or a nitro group, and n is 0, 1 and 2.
Claim 5
Dependent Claim
63 words
The process according to claim 3 wherein said polyfunctional compound (component B) is a compound containing at least two reactive groups selected from the class consisting of an alcoholic hydroxyl group and a primary or secondary amino group bonded to an aliphatic hydrocarbon residue, at least 30 mole% of which consists of a polyfunctional compound containing at least 3 of said reactive groups.
Claim 6
Dependent Claim
18 words
The process according to claim 4 wherein step (1) is effected in the presence of an ester-interchange catalyst.
Claim 7
Dependent Claim
38 words
The process according to claim 5 wherein either or both of steps (1) and (2) is carried out in the presence of an inert organic solvent having a boiling point of 100° to 300° C. at atmospheric pressure.
Claim 8
Dependent Claim
17 words
The process of claim 1 which comprises the step (2)(i) of mixing component A with component B.
Claim 9
Dependent Claim
44 words
The process of claim 7 in which component B is mixed with component A in amounts sufficient to provide from 100 to 250 mol% of hydroxyl, primary amino and secondary amino groups based on the total mols of aryl carboxylate groups in component A.
Claim 10
Dependent Claim
18 words
The process of claim 1 which comprises the step (2)(i) of partially reacting component A with component B.
Claim 11
Dependent Claim
56 words
The process of claim 9 in which component B and component A are partially reacted at a temperature in the range of 70° to 200° C. in amounts sufficient to provide from 100 to 250 mol% of hydroxyl, primary amino and secondary amino groups based on the total mols of aryl carboxylate groups in component A.
Claim 12
Dependent Claim
42 words
The process of claim 1 in which, in step (1), the aromatic polyester (component 1) is reacted with 15 to 55 mol%, based on the total amount, in mols, of dibasic acid contained in component 1, of said diaryl carbonate (component 2).
Claim 13
Dependent Claim
25 words
The process of claim 1 wherein the reaction between the aromatic polyester (component 1) and diaryl carbonate (component 2) is carried out at atmospheric pressure.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |