US5362570A
Expired / Lapsed
US
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Thermoplastic multilayer composites
Assignee: Evonik Operations GmbH
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Filing: 1992-11-16
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Granted: 1994-11-08
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Expires: 2012-11-16
Abstract
Abstract The present invention relates to a multilayer composite having improved chemical resistance and improved intimate bonding between layers comprising (A) a layer of a polyamide molding composition, and (B) a molding composition comprising a linear crystalline polyester and an epoxide containing compound.
Inventors
- 👤 Stefan Rober
- 👤 Joachim Mugge
- 👤 Hans Jadamus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/308; B32B27/32; B32B27/34; B32B27/36; B32B27/38; B32B2307/00; B32B2307/70; B32B2307/718; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/31511; Y10T428/31536; Y10T428/31725; Y10T428/31736; Y10T428/31739; Y10T428/3175; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
165 words
A thermoplastic multilayer composite comprising A) at least one layer, A, of a polyamide molding composition, and B) at least one layer, B, of a molding composition comprising: a) 98 to 60% by weight of a linear, crystalline polyester having units of the formula: ##STR3## where R represents a divalent branched or non-branched, aliphatic or cycloaliphatic radical, derived from a diol having 2 to 12 carbon atoms in the chain, or a mixture of said branched or non-branched, aliphatic or cycloaliphatic radicals thereof, and R' represents a divalent aromatic radical having 6 to 20 carbon atoms in the carbon skeleton, and b) 2 to 40% by weight of a compound, Bb, containing at least one epoxide group, wherein said epoxide groups are contained in a concentration of from 4 to 1000 mmol/kg based on the total weight of layer B, said compound containing epoxide group has an epoxide equivalent weight of from 70 to 10,000; and wherein the layers are intimately bonded to one another.
Claim 2
Dependent Claim
165 words
A thermoplastic multilayer composite comprising A) at least one layer, A, of a polyamide molding composition, and B) at least one layer, B, of a molding composition comprising: a) 98 to 60% by weight of a linear, crystalline polyester having units of the formula: ##STR3## where R represents a divalent branched or non-branched, aliphatic or cycloaliphatic radical, derived from a diol having 2 to 12 carbon atoms in the chain, or a mixture of said branched or non-branched, aliphatic or cycloaliphatic radicals thereof, and R' represents a divalent aromatic radical having 6 to 20 carbon atoms in the carbon skeleton, and b) 2 to 40% by weight of a compound, Bb, containing at least one epoxide group, wherein said epoxide groups are contained in a concentration of from 4 to 1000 mmol/kg based on the total weight of layer B, said compound containing epoxide group has an epoxide equivalent weight of from 70 to 10,000; and wherein the layers are intimately bonded to one another.
Claim 3
Dependent Claim
31 words
A thermoplastic multilayer composite according to claim 1, wherein said epoxide groups are contained in a concentration of from 10 to 1000 mmol/kg based on the total weight of layer B.
Claim 4
Dependent Claim
31 words
A thermoplastic multilayer composite according to claim 1, wherein said epoxide groups are contained in a concentration of from 80 to 500 mmol/kg based on the total weight of layer B.
Claim 5
Dependent Claim
40 words
A thermoplastic multilayer composite according to claim 1, wherein layer B is a molding composition comprising: a) 98 to 70% by weight of said linear, crystalline polyester and b) 2 to 30% by weight of a polymer containing epoxide groups.
Claim 6
Dependent Claim
40 words
A thermoplastic multilayer composite according to claim 1, wherein layer B is a molding composition comprising: a) 98 to 85% by weight of said linear, crystalline polyester and b) 2 to 15% by weight of a polymer containing epoxide groups.
Claim 7
Dependent Claim
130 words
A thermoplastic multilayer composite as claimed in claim 1, comprising A) at least one layer A, of said polyamide molding composition wherein at least 50% of all the end groups present in the polyamide are amino end groups, and said amino end groups are present in layer A at a concentration of from 30 to 130 mmol/kg, and B) at least one layer B, of a molding composition comprising: a) 95 to 60% by weight of said linear, crystalline polyester and b) 5 to 40% by weight of said compound, Bb, containing at least one epoxide group, wherein said epoxide groups are contained in a concentration of from 4 to 95 mmol/kg based on the total weight of layer B; and wherein the layers are intimately bonded to one another.
Claim 8
Dependent Claim
25 words
A thermoplastic multilayer composite according to claim 6, wherein at least 70% of all the end groups present in the polyamide are amino end groups.
Claim 9
Dependent Claim
28 words
A thermoplastic multilayer composite according to claim 6, wherein the concentration of amino end groups in layer A is in the range of from 60 to 110 mmol/kg.
Claim 10
Dependent Claim
40 words
A thermoplastic multilayer composite according to claim 6, wherein layer B is a molding composition comprising: a) 95 to 70% by weight of said linear, crystalline polyester and b) 5 to 30% by weight of said compound containing epoxide groups.
Claim 11
Dependent Claim
40 words
A thermoplastic multilayer composite according to claim 6, wherein layer B is a molding composition comprising: a) 90 to 80% by weight of said linear, crystalline polyester and b) 10 to 20% by weight of said compound containing epoxide groups.
Claim 12
Dependent Claim
31 words
A thermoplastic multilayer composite according to claim 6, wherein said epoxide groups are present at a concentration of from 6 to 75 mmol/kg based on the total weight of layer B.
Claim 13
Dependent Claim
17 words
A thermoplastic multilayer composite according to claim 6, wherein layer Bb contains at least 2 epoxide groups.
Claim 14
Dependent Claim
20 words
A thermoplastic multilayer composite according to claim 6, wherein layer Bb is a compound obtained by reacting epichlorohydrin with diphenylolpropane.
Claim 15
Dependent Claim
14 words
A thermoplastic multilayer composite according to claim 6, wherein layer Bb is triglycidyl isocyanurate.
Claim 16
Dependent Claim
17 words
A thermoplastic multilayer composite according to claim 1, wherein layer Bb contains at least 2 epoxide groups.
Claim 17
Dependent Claim
20 words
A thermoplastic multilayer composite according to claim 1, wherein layer Bb is a compound obtained by reacting epichlorohydrin with diphenylolpropane.
Claim 18
Dependent Claim
14 words
A thermoplastic multilayer composite according to claim 1, wherein layer Bb is triglycidyl isocyanurate.
Claim 19
Dependent Claim
17 words
A thermoplastic multilayer composite according to claim 1, wherein layer Bb is an ethylene/ethyl acrylate/glycidyl methacrylate copolymer.
Claim 20
Dependent Claim
13 words
A molding prepared from a thermoplastic multilayer composite as claimed in claim 1.
Claim 21
Dependent Claim
19 words
A molding as claimed in claim 19, further comprising an additional one or more of said thermoplastic multilayer composites.
Claim 22
Dependent Claim
12 words
A hollow profile prepared from a molding as claimed in claim 19.
Claim 23
Dependent Claim
157 words
A thermoplastic multilayer composite according to claim 1, wherein said linear crystalline polyester comprises a polymer of formula (I) ##STR4## wherein R represents a divalent branched or non-branched, aliphatic or cycloaliphatic radical, derived from a diol having 2 to 12 carbon atoms in the chain, or a mixture of said branched or non-branched, aliphatic or cycloaliphatic radicals thereof, and R' represents a divalent aromatic radical having 6 to 20 carbon atoms in the carbon skeleton, wherein up to 25 mol % of said radical R of said polyester is replaced by a second different radical selected from the group consisting of a divalent branched or non-branched, aliphatic or cycloaliphatic radical derived from a diol having 2 to 12 carbon atoms in the chain and a radical derived from a diol of formula (II) ##STR5## wherein R" represents a divalent radical having from 2 to 4 carbon atoms and x is an integer of from 2 to 50.
Claim 24
Dependent Claim
57 words
A thermoplastic multilayer composite as claimed in claim 1, wherein up to 20 mol % of said aromatic divalent radical R' in said linear crystalline polyester, is replaced by one or more aliphatic divalent radicals derived from a carboxylic acid selected from the group consisting of succinic acid, maleic acid, fumaric acid, sebacic acid and dodecanedioic acid.
Claim 25
Dependent Claim
28 words
A thermoplastic multilayer composite as claimed in claim 1, wherein said linear crystalline polyester has a viscosity number J value of from 80 to 240 cm 3 /g.
Claim 26
Dependent Claim
39 words
A thermoplastic multilayer composite as claimed in claim 1, wherein said polyamide based molding composition further comprises one or more substances selected from the group consisting of impact modifiers, processing auxiliaries, flameproofing agents, stabilizers, viscosity modifiers, fillers, and pigments.
Claim 27
Dependent Claim
36 words
A thermoplastic multilayer composite as claimed in claim 1, wherein layer B further comprises one or more substances selected from the group consisting of impact modifiers, processing auxiliaries, flameproofing agents, stabilizers, viscosity modifiers, fillers and pigments.
Claim 28
Dependent Claim
24 words
A thermoplastic multilayer composite according to claim 1 wherein said polyamide molding composition is selected from the group consisting of poly(ether ester-amides) and poly(ether-amides).
Claim 29
Dependent Claim
20 words
A thermoplastic multilayer composite according to claim 1 wherein said polyamide molding composition comprises at least 60% of a polyamide.
Claim 30
Dependent Claim
81 words
A thermoplastic multilayer composite as claimed in claim 1, wherein said polyamide is selected from the group consisting of 4,6-polyamide, 6-polyamide, 6,6-polyamide, 6,12polyamide, 8,10-polyamide, 10,10-polyamide, 10,12-polyamide, 12,12-polyamide, 11-polyamide, 12-polyamide, and their copolyamides with one or more additional acid components selected from the group consisting of adipic acid, sebacic acid, suberic acid, isophthalic acid, and terephthalic acid; copolyamides of said polyamides with one or more additional diamines selected from the group consisting of bis(4'-aminocyclohexyl)-methane, trimethyl hexamethylene diamine, hexamethylene diamine; and mixtures thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |