US4303573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding blends comprising polyester, ionomer resin and grafted EPDM
Assignee: EIDP Inc
•
Filing: 1981-01-07
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Granted: 1981-12-01
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Expires: 2001-01-07
Abstract
Abstract A molding blend of polyethylene terephthalate, a selected ionomeric terpolymer and a selected graft terpolymer provides molded articles of good toughness.
Inventors
- 👤 George J. Ostapchenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:34
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A molding blend consisting essentially of (a) polyethylene terephthalate, (b) 2 to 20% by weight of blend of an ionomeric terpolymer consisting of 60 to 99% by weight ethylene, 0.5 to 20% by weight methacrylic acid, and 0.5 to 20% by weight isobutyl acrylate, in which the acid moieties are neutralized to the extent of 5 to 100% with divalent metallic cations, (c) 2 to 20% by weight of blend of a second terpolymer of 60 to 90% by weight ethylene, 10 to 38% by weight propylene, 2 to 10% by weight 1,4-hexadiene and 0 to 5% by weight 2,5-norbornadiene which has 0.2 to 9% by weight succinic groups appended to the terpolymer chain.
Claim 2
Dependent Claim
114 words
A molding blend consisting essentially of (a) polyethylene terephthalate, (b) 2 to 20% by weight of blend of an ionomeric terpolymer consisting of 60 to 99% by weight ethylene, 0.5 to 20% by weight methacrylic acid, and 0.5 to 20% by weight isobutyl acrylate, in which the acid moieties are neutralized to the extent of 5 to 100% with divalent metallic cations, (c) 2 to 20% by weight of blend of a second terpolymer of 60 to 90% by weight ethylene, 10 to 38% by weight propylene, 2 to 10% by weight 1,4-hexadiene and 0 to 5% by weight 2,5-norbornadiene which has 0.2 to 9% by weight succinic groups appended to the terpolymer chain.
Claim 3
Dependent Claim
25 words
The molding blend of claim 1 wherein the ionomeric terpolymer and the second terpolymer individually or together have a particle size less than 3.0 micron.
Claim 4
Dependent Claim
10 words
Articles molded from the blends of claim 1 or 2.
Claim 5
Dependent Claim
10 words
Articles extruded from the blends of claim 1 or 2.
Claim 6
Dependent Claim
11 words
An article of claim 4 wherein the article is a sheet.
Claim 7
Dependent Claim
18 words
The blend of claim 1 or 2 which additionally contains 1-40% by weight of blend of a filler.
Claim 8
Dependent Claim
10 words
The blend of claim 6 wherein the filler is mica.
Claim 9
Dependent Claim
14 words
The blend of claim 1 or 2 wherein the divalent metallic cation is zinc.
References Cited (Backward Citations)
US4172859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |