US5280066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester-polyolefin blends containing a functionalized elastomer
Assignee: Johnson Controls Technology Co
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Filing: 1991-09-18
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Granted: 1994-01-18
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Expires: 2011-09-18
Abstract
Abstract A thermoplastic blend of a polyalkylene terephthalate, polyolefin and a functionalized elastomer has improved impact strength while maintaining other needed properties including tensile strength, tensile elongation, and flexural modulus. Recycled polypropylene and PET plastics can be combined with a relative small amount of the functionalized elastomer to provide a blend useful for molding battery containers and other plastic structural members such as automotive components.
Inventors
- 👤 Bora Tekkanat
- 👤 Bryan L. McKinney
- 👤 Helmuth Faust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08L; C08L23/00; C08L23/02; C08L23/10; C08L67/00; C08L67/02; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2367/00; C08J2367/02; C08L53/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A thermoplastic blend, consisting essentially of: 80 to 85 wt. % of (A) polyethylene terephthalate and polypropylene, wherein the weight ratio of polypropylene to polyethylene terephthalate is in the range of about 40:60 to 60:40; and 15to 20 wt. % of (B) of a styrene-ethylene/butylene copolymer functionalized with from about 1 to 5 wt. % of anhydride groups which interact with the polyethylene terephthalate and polypropylene to form a plastic alloy having increased impact strength.
Claim 2
Dependent Claim
75 words
A thermoplastic blend, consisting essentially of: 80 to 85 wt. % of (A) polyethylene terephthalate and polypropylene, wherein the weight ratio of polypropylene to polyethylene terephthalate is in the range of about 40:60 to 60:40; and 15to 20 wt. % of (B) of a styrene-ethylene/butylene copolymer functionalized with from about 1 to 5 wt. % of anhydride groups which interact with the polyethylene terephthalate and polypropylene to form a plastic alloy having increased impact strength.
Claim 3
Dependent Claim
51 words
The blend of claim 1, wherein said blend has an impact strength of at least about 3 foot-lbs per sq. inch, a tensile strength of not less than about 5,000 psi, a flexural modulus of at least 80,000 psi, and a heat deflection temperature of not less than about 195° F.
Claim 4
Dependent Claim
39 words
The blend of claim 2, wherein said blend has an impact strength of at least about 15 foot-lbs per sq. inch, a tensile strength of not less than about 5,000 psi, a flexural modulus of at least 120,000 psi.
Claim 5
Dependent Claim
10 words
A battery container made of the blend of claim 1.
Claim 6
Dependent Claim
12 words
An automotive body structural member made of the blend of claim 1.
References Cited (Backward Citations)
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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) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |