Patent US4774277A successfully refreshed from Google Patents.
US4774277A
Expired / Lapsed
US
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Blends of polyolefin plastics with elastomeric plasticizers
Assignee: Advanced Elastomer Systems LP
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Filing: 1982-03-26
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Granted: 1988-09-27
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Expires: 2002-03-26
Abstract
Abstract Compositions of matter useful in the preparation of film which is soft and has high tensile, tear and impact strength. The compositions comprise polyolefin plastics blended with an elastomeric plasticizer; the latter comprises polyethylene or a copolymer of ethylene and an unsaturated ester of a lower carboxylic acid, olefinic elastomer and hydrocarbon oil.
Inventors
- 👤 Karel C. Janac
- 👤 Robert C. Puydak
- 👤 Donald R. Hazelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:48
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/16; C08L23/26; C08L23/28; C08L23/283; C08L23/0846; C08L23/0853; C08L23/0869; C08L91/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
103 words
A method for preparing a film-forming, thermoplastic elastomeric blend composition comprising admixing from about 5 to about 85 weight percent elastomeric plasticizer with from about 95 to about 15 weight percent polypropylene, polypropylene reactor copolymer, polybutylene, linear low density polyethylene, high density polyethylene, or mixtures thereof in which said elastomeric plasticizer comprises a blend composition of: (a) polyethylene or a copolymer of ethylene and an unsaturated ester of a lower carboxylic acid from about 20 to about 70 weight percent, (b) olefinic elastomer from about 20 to about 80 weight percent and (c) hydrocarbon oil from about 1 to about 35 weight percent.
Claim 2
Independent Claim
103 words
A method for preparing a film-forming, thermoplastic elastomeric blend composition comprising admixing from about 5 to about 85 weight percent elastomeric plasticizer with from about 95 to about 15 weight percent polypropylene, polypropylene reactor copolymer, polybutylene, linear low density polyethylene, high density polyethylene, or mixtures thereof in which said elastomeric plasticizer comprises a blend composition of: (a) polyethylene or a copolymer of ethylene and an unsaturated ester of a lower carboxylic acid from about 20 to about 70 weight percent, (b) olefinic elastomer from about 20 to about 80 weight percent and (c) hydrocarbon oil from about 1 to about 35 weight percent.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein said olefinic elastomer is selected from the group consisting of polyisobutylene, isobutylene-isoprene copolymer elastomers and halogenated isobutylene-isoprene copolymer elastomers.
Claim 4
Dependent Claim
27 words
The composition of claim 1 wherein said polyethylene of said component (b) is selected from the group consisting of high density polyethylene and linear low density polyethylene.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein said polypropylene reactor copolymer includes ethylene from about 1 to about 20 weight percent.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein said olefinic elastomer is selected from the group consisting of ethylene copolymer elastomers and ethylene terpolymer elastomers.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said olefinic elastomers selected from the group consisting of polyisobutylene, isobutylene-isoprene copolymer elastomers and halogenated isobutylene-isoprene copolymer elastomers.
Claim 8
Dependent Claim
16 words
The method of claim 5 wherein said olefinic elastomer comprises a copolymer of ethylene and propylene.
Claim 9
Dependent Claim
19 words
The method of claim 5 wherein said olefinic elastomer comprises a terpolymer of ethylene, propylene and a nonconjugated diene.
Claim 10
Dependent Claim
17 words
The composition of claim 2 wherein said isoprene copolymer elastomer comprises a copolymer of isobutylene and isoprene.
Claim 11
Dependent Claim
21 words
The composition of claim 2 wherein said halogenated isoprene copolymer elastomer comprises chlorinated isobutylene isoprene elastomer or brominated isobutylene isoprene elastomer.
Claim 12
Dependent Claim
27 words
The method of claim 1, wherein said polyethylene of said component (a) is selected from the group consisting of high density polyethylene and linear low density polyethylene.
Claim 13
Dependent Claim
26 words
The method of claim 1 wherein said unsaturated ester of a lower carboxylic acid is selected from the group consisting of vinyl esters and alkyl acrylates.
Claim 14
Dependent Claim
12 words
The method of claim 11 wherein said vinyl ester comprises vinyl acetate.
Claim 15
Dependent Claim
21 words
The method of claim 11 wherein said alkyl acrylate is selected from the group consisting of methyl acrylate and ethyl acrylate.
Claim 16
Dependent Claim
21 words
The method of claim 1 wherein said hydrocarbon oil is selected from the group consisting of paraffinic, naphthenic and aromatic oils.
Claim 17
Dependent Claim
20 words
The method of claim 1 wherein said polypropylene reactor copolymer includes ethylene from about 1 to about 20 weight percent.
Claim 18
Dependent Claim
9 words
A film produced by the method of claim 1.
Claim 19
Dependent Claim
33 words
A film produced by the method of claim 1 and a film manufacturing process selected from the group consisting of cast extrusion, blown film, tubular water bath extrusion, cast coextrusion, and extrusion coating.
Claim 20
Dependent Claim
21 words
The method of claim 1 wherein said elastomeric plasticizer and said polypropylene or polypropylene reactor copolymer are each in pellet form.
Claim 21
Dependent Claim
21 words
The method of claim 1 further comprising up to about 30 weight percent of said elastomeric plasticizer of an olefinic plastic.
Claim 22
Dependent Claim
24 words
The method of claim 20 wherein said olefinic plastic is selected from the group consisting of polypropylene, high density polyethylene and polypropylene reactor copolymer.
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |