US4581398A
Expired / Lapsed
US
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Hydrolysis-resistant thermoplastic molding composition comprising high molecular weight polybutylene terephthalatepolyester and a dicarboxylic acid salt
Assignee: Huels AG
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Filing: 1984-05-29
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Granted: 1986-04-08
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Expires: 2004-05-29
Abstract
Abstract Hydrolysis-resistant, thermoplastic molding compositions are made from high-molecular weight, linear polybutylene terephthalate and 0.1-10 mole %, based on the amount of the dicarboxylic acid component of the polyester, of a salt of Formula (A) [(-O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, (A) wherein M is an alkali or alkaline earth metal cation, R is an aromatic or cycloaliphatic residue or an aliphatic residue of 2-20 carbon atoms in the carbon chain, and x is 0 or 1.
Inventors
- 👤 Michael Droscher
- 👤 Horst Heuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
79 words
A hydrolysis-resistant, thermoplastic molding composition comprising high-molecular weight, linear polybutylene terephthalate polyester and 0.1-10 mole %, based on the molar content of the dicarboxylic acid component of the polyester, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
Claim 2
Dependent Claim
79 words
A hydrolysis-resistant, thermoplastic molding composition comprising high-molecular weight, linear polybutylene terephthalate polyester and 0.1-10 mole %, based on the molar content of the dicarboxylic acid component of the polyester, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
Claim 3
Dependent Claim
20 words
A molding composition of claim 1, wherein the amount of said salt is 0.5-2.5 mole %, on the same basis.
Claim 4
Dependent Claim
17 words
A molding composition of claim 1, wherein said salt is an alkali metal salt of 5-sulfoisophthalic acid.
Claim 5
Dependent Claim
21 words
A molding composition of claim 1, wherein said salt is an alkali metal or alkaline earth metal salt of isophthalic acid.
Claim 6
Dependent Claim
20 words
A molding composition of claim 1, wherein said salt is a mixed salt of alkali and alkaline earth metal cations.
Claim 7
Dependent Claim
18 words
A molding composition of claim 1, wherein said salt component comprises a mixture of salts of said formula.
Claim 8
Dependent Claim
21 words
A molding composition of claim 1, wherein M is Na +1 , K +1 , Mg +2 or Ca +2 .
Claim 9
Dependent Claim
15 words
A molding composition of claim 1, wherein R is cyclohexyl, phenyl or C 2-20 -alk-α,ω-diyl.
Claim 10
Dependent Claim
10 words
A molding composition of claim 1, wherein x is 0.
Claim 11
Dependent Claim
10 words
A molding composition of claim 1, wherein x is 1.
Claim 12
Dependent Claim
12 words
A molding composition of claim 1, wherein the polyester is homopolybutylene terephthalate.
Claim 13
Independent Claim
89 words
A method for producing a polybutylene terephthalate having good hydrolysis resistance, comprising including in the polymerization medium used to prepare the polybutylene terephthalate 0.1-10 mole %, based on the molar content of the dicarboxylic acid component of the polyester, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
Claim 14
Independent Claim
89 words
A method for producing a polybutylene terephthalate having good hydrolysis resistance, comprising including in the polymerization medium used to prepare the polybutylene terephthalate 0.1-10 mole %, based on the molar content of the dicarboxylic acid component of the polyester, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
Claim 15
Dependent Claim
21 words
In a film, sheet or molded part comprising polybutylene terephthalate, the improvement wherein the latter is a composition of claim 1.
Claim 16
Dependent Claim
14 words
A molding composition of claim 3 wherein said salt is 5-sulfoisophthalic acid trisodium salt.
Claim 17
Independent Claim
77 words
A method for improving the hydrolysis resistance of a polybutylene terephthalate consisting essentially of incorporating in the molding composition an amount, effective for improving hydrolysis resistance, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, (A) wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
Claim 18
Independent Claim
77 words
A method for improving the hydrolysis resistance of a polybutylene terephthalate consisting essentially of incorporating in the molding composition an amount, effective for improving hydrolysis resistance, of a salt of the formula [(.sup.- O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, (A) wherein M is an alkali or alkaline earth metal cation chosen in kind and amount to render the salt electrically neutral, R is phenyl, cyclohexyl, or an alkyl group of 2-20 carbon atoms, and x is 0 or 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |