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US4473688A
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High-toughness thermoplastic polyamide composition
Assignee: ENICHEM TECNORESINE SpA AN ITALIAN Co
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Filing: 1983-02-22
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Granted: 1984-09-25
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Expires: 2003-02-22
Abstract
Abstract A high-toughness thermoplastic polyamide composition resistant to impact even at low temperature, formed from polyamides of type 6 or 66 in mixture with alternating elastomer copolyesteramides in a quantity of between 3 and 10% and preferably between 5 and 7% by weight.
Inventors
- 👤 Alessandro Zappa
- 👤 Nicola Di Donato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:48
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
37 words
A high-toughness thermoplastic polyamide comprising at least one polyamide 6 or 66 and between 3 and 10% by weight of at least one alternating elastomer copolyesteramide derived from an aryl polycarboxylic acid, a diamine and a diol.
Claim 2
Dependent Claim
37 words
A high-toughness thermoplastic polyamide comprising at least one polyamide 6 or 66 and between 3 and 10% by weight of at least one alternating elastomer copolyesteramide derived from an aryl polycarboxylic acid, a diamine and a diol.
Claim 3
Dependent Claim
19 words
A composition as claimed in the preceding claim, wherein the copolyesteramide content varies between 5 and 7% by weight.
Claim 4
Dependent Claim
137 words
A composition as claimed in claim 1, wherein the elastomer copolyesteramide is formed from recurring segments of a long-chain diesteramide of the general formula ##STR4## and from recurring segments of a short-chain diesteramide of the general formula ##STR5## in which PAG indicates a bivalent radical derived from a polyoxyalkyleneglycol of molecular weight between 400 and 3,500, A indicates a bivalent radical derived from alpha, omega-dihydroxyalkanes of molecular weight less than 2500, and R indicates a bivalent radical derived from a diesterdiamide of the general formula ##STR6## in which R 1 is an alkyl radical containing 1 to 8 carbon atoms, an aryl radical containing 6 to 10 carbon atoms, or an alicyclic radical from C 4 to C 10 , and R 2 and R 3 , which can be the same or different, are aryl radicals.
Claim 5
Dependent Claim
42 words
A high-toughness thermoplastic polyamide composition which comprises polyamide 6 and from 5 to 7% by weight of an elastomeric copolyesteramide that is derived from copolymerization of hexamethylene diamine with dimethylterephthalate followed by condensation of the polymer thus obtained with hexanediol and polytetramethyleneglycol.
Claim 6
Dependent Claim
42 words
A high-toughness thermoplastic polyamide composition which comprises polyamide 6 and from 5 to 7% by weight of an elastomeric copolyesteramide that is derived from copolymerization of hexamethylene diamine with dimethylterephthalate followed by condensation of the polymer thus obtained with hexanediol and polytetramethyleneglycol.
Claim 7
Independent Claim
29 words
A method of imparting impact resistance to a member of the group consisting of polyamide 6 and polyamide 66 which comprises adding an amount of an alternating elastomer copolyesteramide.
Claim 8
Independent Claim
29 words
A method of imparting impact resistance to a member of the group consisting of polyamide 6 and polyamide 66 which comprises adding an amount of an alternating elastomer copolyesteramide.
Claim 9
Dependent Claim
137 words
A method as defined in claim 5 wherein the elastomer copolyesteramide is formed from recurring segments of a long-chain diesteramide of the general formula ##STR7## and from recurring segments of a short-chain diesteramide of the general formula ##STR8## in which PAG indicates a bivalent radical derived from a polyoxyalkyleneglycol of molecular weight between 400 and 3,500, A indicates a bivalent radical derived from alpha, omega-dihydroxyalkanes of molecular weight less than 2500, and R indicates a bivalent radical derived from a diesterdiamide of the general formula ##STR9## in which R 1 is an alkyl radical containing 1 to 8 carbon atoms, an aryl radical containing 6 to 10 carbon atoms, or an alicyclic radical from C 4 to C 10 , and R 2 and R 3 , which can be the same or different, are aryl radicals.
Claim 10
Dependent Claim
41 words
A method as defined in claim 5 wherein the member of the group is polyamide 6 and the elastomeric copolyesteramide is derived from copolymerization of hexamethylene diamine with dimethyterephtholate followed by condensation of the polymer thus obtained with hexanediol and polytetra-methyleneglycol.
Claim 11
Dependent Claim
20 words
A method as defined in claim 5 wherein the copolyesteramide comprises from 3 to 10% by weight of the composition.
Claim 12
Dependent Claim
20 words
A method as defined in claim 5 wherein the copolyesteramide comprises from 5 to 7% by weight of the composition.
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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |