US4966941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nylon compositions for blowmolding
Assignee: EIDP Inc
•
Filing: 1989-01-19
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Granted: 1990-10-30
•
Expires: 2009-01-19
Abstract
Abstract It has now been found that a unique combination of additives makes semi-crystalline polyamides readily processible by extrusion blowmolding to make hollow, stiff parts of various shapes. The compositions consist essentially of semicrystalline polyamide, a selected toughening agent and an anhydride-rich ethylene copolymer, and a fibrillar polytetrafluoroethylene.
Inventors
- 👤 Pallatheri M. Subramanian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:55
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A composition consisting essentially of (a) 90-65 parts by weight semicrystalline polyamide having a number average molecular weight between 10000 and 25000; (b) 10-30 parts by weight of either: (1) an ionic copolymer of at least one alpha-olefin having from 2 to 6 carbon atoms and at least one alpha, beta-unsaturated organic carboxylic acid having from 3 to 6 carbon atoms which is partially or completely neutralized with a metal cation or, (2) a mixture of a polyethylene and a functionalized polyethylene, said functionalized polyethylene containing up to 10% by weight carboxylic acid or anhydride functional moieties; and (c) 0.1 to 3 parts by weight of an anhydride-rich copolymer containing alternating units of maleic anhydride and an alpha-olefin selected from the group consisting of styrene, ethylene, and octadecene, which copolymer contains at least 15% by weight anhydride units and, (d) 0.1 to 3 parts by weight of a fibrillar fluoropolymer resin.
Claim 2
Dependent Claim
151 words
A composition consisting essentially of (a) 90-65 parts by weight semicrystalline polyamide having a number average molecular weight between 10000 and 25000; (b) 10-30 parts by weight of either: (1) an ionic copolymer of at least one alpha-olefin having from 2 to 6 carbon atoms and at least one alpha, beta-unsaturated organic carboxylic acid having from 3 to 6 carbon atoms which is partially or completely neutralized with a metal cation or, (2) a mixture of a polyethylene and a functionalized polyethylene, said functionalized polyethylene containing up to 10% by weight carboxylic acid or anhydride functional moieties; and (c) 0.1 to 3 parts by weight of an anhydride-rich copolymer containing alternating units of maleic anhydride and an alpha-olefin selected from the group consisting of styrene, ethylene, and octadecene, which copolymer contains at least 15% by weight anhydride units and, (d) 0.1 to 3 parts by weight of a fibrillar fluoropolymer resin.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the polyamide is 66 nylon.
Claim 4
Dependent Claim
40 words
The composition of claim 1 or 2 wherein component (b) is an ionic copolymer of at least one alpha-olefin and at least one alpha, beta-unsaturated organic carboxylic acid, in which the acid moiety is partially neutralized with a metal cation.
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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) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |