US4131595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic moulding compositions
Assignee: DuPont de Nemours Deutschland GmbH
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Filing: 1977-02-16
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Granted: 1978-12-26
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Expires: 1997-02-16
Abstract
Abstract Copolyesters of terephthalic acid, 1,4-butanediol and an aliphatic dicarboxylic acid of the formula I hooc--r--cooh (i) wherein R represents a divalent aliphatic hydrocarbon group containing not more than 34 carbon atoms, are eminently suitable as impact modifiers for polyalkylene terephthalates for improving the toughness properties.
Inventors
- 👤 Franz Breitenfellner
- 👤 Holger Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:26
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A moulding compound based on polyester mixtures consisting of a polyalkylene terephthalate and a further thermoplastic polyester, said moulding compound containing a. 95 to 60% by weight, referred to the polyester mixture, of poly(1,4-butylene terephthalate), and b. 5 to 40% by weight of a copolyester of terephthalic acid, 1,4-butanediol and aliphatic dicarboxylic acid of the formula I hooc--r--cooh (i) wherein R represents a divalent aliphatic hydrocarbon group having not more than 34 carbon atoms and wherein the acid of formula I is from 5 to 30 molar percent of the copolyester.
Claim 2
Dependent Claim
91 words
A moulding compound based on polyester mixtures consisting of a polyalkylene terephthalate and a further thermoplastic polyester, said moulding compound containing a. 95 to 60% by weight, referred to the polyester mixture, of poly(1,4-butylene terephthalate), and b. 5 to 40% by weight of a copolyester of terephthalic acid, 1,4-butanediol and aliphatic dicarboxylic acid of the formula I hooc--r--cooh (i) wherein R represents a divalent aliphatic hydrocarbon group having not more than 34 carbon atoms and wherein the acid of formula I is from 5 to 30 molar percent of the copolyester.
Claim 3
Dependent Claim
39 words
A moulding compound according to claim 1, wherein the copolyester has a minimum impact strength of 20 cmkp/cm 2 , measured in accordance with DIN 53 453 at 23° C., and exhibits no rupture when this measurement is made.
Claim 4
Dependent Claim
27 words
A moulding compound according to claim 1, wherein the radical R in the aliphatic dicarboxylic acids of the formula I contains from 5 to 34 carbon atoms.
Claim 5
Dependent Claim
26 words
A moulding compound according to claim 1, wherein the copolyester contains as condensation component 10 to 25, molar percent of dicarboxylic acid of the formula I.
Claim 6
Dependent Claim
17 words
A moulding compound according to claim 1, wherein R in formula I represents linear or branched alkylene.
Claim 7
Dependent Claim
19 words
A moulding compound according to claim 1, wherein the copolyester contains sebacic acid as condensation component of formula I.
Claim 8
Dependent Claim
26 words
A moulding compound according to claim 1, which contains 90 to 70% by weight of component (a) and 10 to 30% by weight of component (b).
Claim 9
Dependent Claim
32 words
A moulding compound according to claim 7, which contains (a) approx. 85% by weight of poly(1,4-butylene terephthalate) and (b) approx. 15% by weight of copolyester with 20 molar percent of sebacic acid.
Claim 10
Dependent Claim
20 words
A moulding compound according to claim 1, which contains in addition 5 to 60% by weight of a reinforcing filler.
Claim 11
Dependent Claim
20 words
A moulding compound according to claim 1, which contains in addition 5 to 20% by weight of a flame retardant.
Claim 12
Dependent Claim
18 words
A moulding compound according to claim 3 wherein the radical R contains from 8 to 34 carbon atoms.
Claim 13
Dependent Claim
16 words
A moulding compound according to claim 9 which contains 10 to 40% by weight of filler.
Claim 14
Dependent Claim
13 words
A moulding compound according to claim 9 wherein the filler is glass fibers.
Claim 15
Dependent Claim
18 words
A moulding compound according to claim 10 which contains 5 to 15% by weight of a flame retardant.
Claim 16
Dependent Claim
17 words
A molded article made by injection molding or extrusion of a molding compound according to claim 1.
References Cited (Backward Citations)
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Cited
US3644267A
Cited
US3673139A
Cited
US3953394A
Cited
US3953394B1
Cited
GB1417535A
Cited
US4052356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |