EP0044141A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Filled compositions of thermoplastic polyamide and polyester
Assignee: Imperial Chemical Industries Ltd
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Filing: 1981-06-17
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Granted: —
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Expires: 2001-06-17
Abstract
Abstract An extruded profiled section characterised in that it has been extruded from a composition comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the composition of the filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1, which composition preferably has a melt flow index of not greater than 2 measured according to ASTM-D1238 using a standard die of bore 2.096 mm, length 8 mm and a load of 2.16 kg at a temperature of 285°C. A preferred composition for preparing the extruded profiled section comprises a blend in which the polyamide contains an excess of terminal amino groups, and preferably at least 20 g equivalents of terminal amino groups per 10 6 g of polyamide, in excess of the carboxyl groups.
Inventors
- 👤 Eric Nield
- 👤 Martin Keith Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 16:40
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; B; B29; B29C; B29C48/00; C08L; C08L77/00; B29C48/03; B29C48/04; B29C48/05
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
An extruded profiled section characterised in that it has been extruded from a composition comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the composition of the filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1.
Claim 2
Dependent Claim
67 words
An extruded profiled section characterised in that it has been extruded from a composition comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the composition of the filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1.
Claim 3
Dependent Claim
22 words
An extruded profile according to claim 1 wherein the weight ratio of the polyamide to the polyester is between 2:1 and 19:1.
Claim 4
Dependent Claim
51 words
An extruded profile according to either of claim 1 or claim 2 wherein the melt flow index of the composition is not greater than 2 measured according to ASTM-D1238 using a standard die of bore 2.096 mm, length 8 mm and a load of 2.16 kg at a temperature of 285°C.
Claim 5
Dependent Claim
24 words
An extruded profile according to any one of the preceding claims wherein the polyamide has an excess of amine end-groups over the carboxyl end-groups.
Claim 6
Dependent Claim
33 words
An extruded profile according to claim 4 in which the polyamide contains at least 20 g equivalents of terminal amino groups per 10 6 g of polyamide in excess of the carboxyl groups.
Claim 7
Dependent Claim
20 words
An extruded profile according to any one of the preceding claims in which the inorganic fibrous filler is glass fibre.
Claim 8
Independent Claim
77 words
A method of extruding a profile section characterised in that a composition comprising a blend of a linear polyamide, a linear polyester ccntaining at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the ocmposition of the fibrous filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1 is intimately blended and extruded through a die of profiled section.
Claim 9
Independent Claim
77 words
A method of extruding a profile section characterised in that a composition comprising a blend of a linear polyamide, a linear polyester ccntaining at least 80% by weight of ethylene terephthalate units and an inorganic fibrous filler wherein the composition contains 5 to 60% by weight of the ocmposition of the fibrous filler and the weight ratio of polyamide to polyester is between 1:1 and 49:1 is intimately blended and extruded through a die of profiled section.
Claim 10
Dependent Claim
40 words
A method according to claim 7 wherein the polyamide, polyester and fibrous filler have been compounded together under melt conditions to provide an intimate mixture which is formed into granules as a feed composition for extrusion of the profiled section.
Claim 11
Dependent Claim
86 words
A'thermoplastics composition suitable for extrusion into extruded profiled sections comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units, and an inorganic fibrous filler characterised in that the composition contains from 5 to 60% by weight of the composition of the inorganic fibrous filler., the weight ratio of polyamide to polyester is between 1:1 and 49:1, preferably between 2:1 and 19:1 and wherein the polyamide contains an excess of terminal amino groups over the carboxyl groups.
Claim 12
Dependent Claim
86 words
A'thermoplastics composition suitable for extrusion into extruded profiled sections comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units, and an inorganic fibrous filler characterised in that the composition contains from 5 to 60% by weight of the composition of the inorganic fibrous filler., the weight ratio of polyamide to polyester is between 1:1 and 49:1, preferably between 2:1 and 19:1 and wherein the polyamide contains an excess of terminal amino groups over the carboxyl groups.
Claim 13
Dependent Claim
102 words
A thermoplastics composition according to claim 9 suitable for extrusion into extruded profiled sections comprising a blend of a linear polyamide, a linear polyester containing at least 80% by weight of ethylene terephthalate units, and an inorganic fibrous filler characterised in that the composition contains from 5 to 60% by weight of the composition of the inorganic fibrous filler, the weight ratio of polyamide to polyester is between 1:1 and 49:1, preferably between 2:1 and 19:1 and wherein the polyamide contains at least 20 g equivalents of terminal amino groups per 10 6 g of polyamide in excess of the carboxyl groups.
References Cited (Backward Citations)
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