US5039760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resin composition
Assignee: Polyplastics Co Ltd
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Filing: 1990-02-02
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Granted: 1991-08-13
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Expires: 2010-02-02
Abstract
Abstract A polyester resin composition exhibiting improved heat-resistant flexibility including (A) a polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (b) an aliphatic glycol, and (c) between 0.001 to 1.0 mole %, based upon component (a), of a branch-forming compound, and (B) between 0.1 to 10% by weight (based on the total weight of the composition) of a bisoxazoline compound.
Inventors
- 👤 Toshio Nakane
- 👤 Michiro Naka
- 👤 Yukihiko Kageyama
- 👤 Hiroaki Konuma
- 👤 Kenji Hijikata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:18
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35; C08K5/353
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A moldable heat-resistant polyester resin composition which retains its flexibility when subjected to cyclic thermal conditions, said composition comprising: (A) a branched polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (b) an aliphatic glycol, and (c) between 0.001 to 1.0 mole % based upon component (a), of a branch-forming compound, and (B) between 0.1 to 10% by weight, based on the total weight of the composition, of a bisoxazoline compound which is one selected from m-phenylenebisoxazoline or p-phenylenebisoxazoline.
Claim 2
Dependent Claim
89 words
A moldable heat-resistant polyester resin composition which retains its flexibility when subjected to cyclic thermal conditions, said composition comprising: (A) a branched polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (b) an aliphatic glycol, and (c) between 0.001 to 1.0 mole % based upon component (a), of a branch-forming compound, and (B) between 0.1 to 10% by weight, based on the total weight of the composition, of a bisoxazoline compound which is one selected from m-phenylenebisoxazoline or p-phenylenebisoxazoline.
Claim 3
Dependent Claim
24 words
A resin composition as in claim 1, wherein said aliphatic glycol is at least one compound selected from C2 to C8 low-molecular weight glycols.
Claim 4
Dependent Claim
29 words
A resin composition as in claim 2, wherein said C2 to C8 low-molecular weight glycol is at least one glycol selected from ethylene glycol, 1,4-butylene glycol and 1,4-butene glycol.
Claim 5
Dependent Claim
42 words
A resin composition as in claim 1, wherein said branch-forming compound is a compound having at least three functional groups, in sum total, in its molecule, wherein said functional groups are selected from carboxyl and hydroxyl groups, and ester-forming derivative groups thereof.
Claim 6
Dependent Claim
29 words
A resin composition as in claim 4, wherein said branch-forming compound is at least one compound selected from trimesic acid, trimellitic acid, and pyromellitic acid, and ester-forming derivatives thereof.
References Cited (Backward Citations)
US3673139A
Cited
US3959215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |