Patent US4066607A successfully refreshed from Google Patents.
US4066607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced moulding composition based on thermoplastic polyesters
Assignee: DuPont de Nemours Deutschland GmbH
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Filing: 1976-07-09
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Granted: 1978-01-03
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Expires: 1996-07-09
Abstract
Abstract Moulding materials reinforced with fiber fillers and based on copolyesters of poly-1,4-butylene terephthalate are suitable for the manufacture of mouldings, especially those having thin walls, which have low tendency to distortion.
Inventors
- 👤 Franz Breitenfellner
- 👤 Lothar Buxbaum
- 👤 Karl Leidig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/66; C08G63/668; C08G63/672; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/08; C08K3/40; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L; C08L101/00; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A reinforced moulding composition which is based on a thermoplastic polyester and contains (a) a copolyester which is based on poly-1,4-butylene terephthalate and has a crystallisation temperature (T C ) of 35° to 70° C and an amount, which produces this T C range, of one or more cocomponents which are selected from the group comprising orthophthalic acid, isophthalic acid, 4,4'-diphenylsulphonedicarboxylic acid, 2,2-bis-[4-(hydroxyethoxyphenyl)]-propane, 1,3-bis-hydroxyethyl-5,5-dialkyl-hydantoin, 1,3,3-trimethyl-5-carboxy-3-(p-carboxyphenyl)-indane and 1,4-cyclohexanedimethanol and (b) 2-60% by weight, relative to the total composition, of a reinforcing fibrous filler.
Claim 2
Dependent Claim
82 words
A reinforced moulding composition which is based on a thermoplastic polyester and contains (a) a copolyester which is based on poly-1,4-butylene terephthalate and has a crystallisation temperature (T C ) of 35° to 70° C and an amount, which produces this T C range, of one or more cocomponents which are selected from the group comprising orthophthalic acid, isophthalic acid, 4,4'-diphenylsulphonedicarboxylic acid, 2,2-bis-[4-(hydroxyethoxyphenyl)]-propane, 1,3-bis-hydroxyethyl-5,5-dialkyl-hydantoin, 1,3,3-trimethyl-5-carboxy-3-(p-carboxyphenyl)-indane and 1,4-cyclohexanedimethanol and (b) 2-60% by weight, relative to the total composition, of a reinforcing fibrous filler.
Claim 3
Dependent Claim
16 words
A moulding composition according to claim 1, characterised in that the crystallisation temperature is 40°-60° C.
Claim 4
Dependent Claim
69 words
A moulding composition according to claim 1, characterised in that the amount of the cocomponent, relative to the copolyester, is 1 to 9 mol % of 1,3-bis-hydroxyethyl-5,5-dialkylhydantoin, 1 to 6 mol % of 2,2-bis-[4-(hydroxyethoxyphenyl)]-propane, 1 to 6 mol % of 1,3,3-trimethyl-5-carboxy-3-(p-carboxyphenyl)-indane, 3.5 to 20 mol % of isophthalic acid or orthophthalic acid or 1 to 7.5 mol % of 4,4'-diphenylsulphonedicarboxylic acid or 2 to 10 mol % of 1,4-cyclohexanedimethanol.
Claim 5
Dependent Claim
17 words
A moulding composition according to claim 1, characterised in that it contains glass fibres as the filler.
Claim 6
Dependent Claim
52 words
A moulding composition according to claim 1, characterised in that, based on the copolyester, 3 to 4 mol % of 2,2-bis-[4-(hydroxyethoxyphenyl)]-propane or 4 to 6 mol % of 1,3-bis-hydroxyethyl-5,5-dimethylhydantoin are cocondensed, as the cocomponent, in the copolyester and that it contains 5-50% by weight, based on the total composition, of glass fibres.
Claim 7
Dependent Claim
15 words
Use of the moulding composition according to claim 1 for the manufacture of injection-moulded articles.
Claim 8
Dependent Claim
66 words
A moulding composition according to claim 3, characterised in that the amount of the cocomponent, relative to the copolyester, is 2.5 to 7 mol% of 1,3-bis-hydroxyethyl-5,5-dialkylhydantoin, 1.5 to 5 mol% of 2,2-bis[4-hydroxyethoxyphenyl]propane, 1.5 to 5 mol% of 1,3,3-trimethyl-5-carboxy-3-(p-carboxyphenyl)-indane, 5 to 12.5 mol% of isophthalic acid, 5 to 12.5 mol% of orthophthalic acid, 1.5 to 6 mol% of 4,4'-diphenylsulphonedicarboxylic acid or 3 to 8 mol% of 1,4-cyclohexanedimethanol.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |