US5128404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic blow moldable polybutylene terephthalate compositions
Assignee: EIDP Inc
•
Filing: 1990-06-18
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Granted: 1992-07-07
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Expires: 2010-06-18
Abstract
Abstract Semi-crystalline blow moldable polyester compositions formed by melt blending a mixture consisting essentially of a poly(butylene terephthalate, an ethylene copolymer containing epoxide groups, and an ionomer obtained by neutralizing with Na+ or K+.
Inventors
- 👤 King L. Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A semi-crystalline extrusion blow-moldable polyester composition comprising melt blends consisting essentially of: a) 62-88 weight percent at least one poly(butylene terephthalate) PBT homopolymer having an inherent viscosity of at least 0.80 dl/g, b) 10-30 weight percent of at least one ethylene terpolymer, E/X/Y, where E is ethylene at least 57 weight percent, X is glycidyl methacrylate from 4-8 weight percent and Y is from 10-35 weight percent of n-butyl acrylate, and c) 2-8 weight percent of at least one ionomer obtained by neutralizing with Na + or K + at least 40 percent of the carboxyl groups in an ethylene copolymer which contains about 9-20 weight percent of units derived form (meth)acrylic acid and 0-35 weight percent of units derived from C 1 -C 6 alkyl (meth)acrylate, the weight percentages given for each of components a), b) nd c) being based on the total of these components only.
Claim 2
Dependent Claim
148 words
A semi-crystalline extrusion blow-moldable polyester composition comprising melt blends consisting essentially of: a) 62-88 weight percent at least one poly(butylene terephthalate) PBT homopolymer having an inherent viscosity of at least 0.80 dl/g, b) 10-30 weight percent of at least one ethylene terpolymer, E/X/Y, where E is ethylene at least 57 weight percent, X is glycidyl methacrylate from 4-8 weight percent and Y is from 10-35 weight percent of n-butyl acrylate, and c) 2-8 weight percent of at least one ionomer obtained by neutralizing with Na + or K + at least 40 percent of the carboxyl groups in an ethylene copolymer which contains about 9-20 weight percent of units derived form (meth)acrylic acid and 0-35 weight percent of units derived from C 1 -C 6 alkyl (meth)acrylate, the weight percentages given for each of components a), b) nd c) being based on the total of these components only.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein component a) is present in an amount of 69-85 weight percent, component b) is present in an amount of 12-25 weight percent, component c) is present in an amount of 3-6 weight percent.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein component c) is obtained by neutralizing with Na + .
Claim 5
Dependent Claim
31 words
The composition of claim 1 which optionally contains up to about 40 parts of at least one filler per 100 parts of the total weight of components a), b), and c).
Claim 6
Dependent Claim
17 words
The composition of claim 4 wherein the filler is selected from chopped glass and acicular calcium metasilicate.
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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) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |