US5084523A
Expired / Lapsed
US
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Thermoplastic molding compositions based on polyphenylene ethers
Assignee: Huels AG
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Filing: 1989-08-14
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Granted: 1992-01-28
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Expires: 2009-08-14
Abstract
Abstract Molding compositions containing polyphenylene ether, polyamide, at least one aspartic acid derivative and optionally, a styrene resin and/or impact strength promoter. These compositions have high strength combined with good thermal stability and solvent resistance.
Inventors
- 👤 Wolfgang Neugebauer
- 👤 Joachim Muegge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08K5/17; C08K5/175; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L77/00; C08L65/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A thermoplastic molding composition comprising: a) 1-60 parts polyphenylene ether, b) 40-100 parts polyamide, c) 0.1-5 parts of an aspartic acid derivative of the formula: ##STR3## wherein X is selected from the group consisting of OH, OR and NR 1 R 2 , in which R is an alkyl or aryl group with up to 10 carbon atoms, and R 1 and R 2 , independently of one another, are selected from the group consisting of hydrogen, alkyl, cycloalkyl, hydroxyalkyl, aryl group, each with up to 10 carbon atoms, alkyl-acyl group, aryl-acyl group, alkyl-substituted sulfonyl and aryl-substituted sulfonyl group, each with up to 14 carbon atoms, or R 1 and R 2 in combination are a tetramethylene or pentamethylene group.
Claim 2
Dependent Claim
120 words
A thermoplastic molding composition comprising: a) 1-60 parts polyphenylene ether, b) 40-100 parts polyamide, c) 0.1-5 parts of an aspartic acid derivative of the formula: ##STR3## wherein X is selected from the group consisting of OH, OR and NR 1 R 2 , in which R is an alkyl or aryl group with up to 10 carbon atoms, and R 1 and R 2 , independently of one another, are selected from the group consisting of hydrogen, alkyl, cycloalkyl, hydroxyalkyl, aryl group, each with up to 10 carbon atoms, alkyl-acyl group, aryl-acyl group, alkyl-substituted sulfonyl and aryl-substituted sulfonyl group, each with up to 14 carbon atoms, or R 1 and R 2 in combination are a tetramethylene or pentamethylene group.
Claim 3
Dependent Claim
81 words
The thermoplastic molding composition of claim 1, wherein said polyphenylene ether comprises repeating units of the formula ##STR4## in which R 5 and R 6 , independently of one another, are hydrogen or an alkyl group with up to 6 carbon atoms, R 3 is hydrogen and R 4 is a tertiary alkyl group with up to 6 carbon atoms, or R 3 and R 4 , independently of one another, are an n-alkyl group with up to 6 carbon atoms.
Claim 4
Dependent Claim
18 words
The thermoplastic molding composition of claim 2, wherein said polyphenylene ether comprises repeating units of the formula ##STR5##
Claim 5
Dependent Claim
23 words
The thermoplastic molding composition of claim 1, wherein said polyphenylene ether has a reduced specific viscosity of 20 to 80 cm 3 /g.
Claim 6
Dependent Claim
28 words
The thermoplastic molding composition of claim 1, wherein said polyamide is PA 6, PA 46, PA 66, PA 612, PA 1010, PA 1012, PA 11, or PA 12.
Claim 7
Dependent Claim
19 words
The thermoplastic molding composition of claim 1, wherein the number average molecular weight of said polyamide is above 5000.
Claim 8
Dependent Claim
19 words
The thermoplastic molding composition of claim 6, wherein the number average molecular weight of said polyamide is above 10,000.
Claim 9
Dependent Claim
15 words
The thermoplastic molding composition of claim 1, wherein said aspartic acid derivative is DL-aspartic acid.
Claim 10
Dependent Claim
43 words
A process for producing the thermoplastic molding composition of claim 1, comprising the steps of: preparing a preliminary molding composition by mixing said polyphenylene ether and said aspartic acid derivative, and in a subsequent step blending said preliminary molding composition with said polyamide.
Claim 11
Dependent Claim
31 words
The process of claim 9, wherein said preliminary molding composition is prepared by mixing said polyphenylene ether and aspartic acid derivative in a melt at a temperature from about 200-320° C.
Claim 12
Dependent Claim
36 words
The process of claim 9, wherein said preliminary molding composition is prepared by mixing said polyphenylene ether and aspartic acid derivative in a solvent solution and then removing the solvent at temperatures between about 200-320° C.
References Cited (Backward Citations)
US4873276A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
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