Patent US4414053A successfully refreshed from Google Patents.
US4414053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends and easy-peel films prepared therefrom
Assignee: Chevron USA Inc
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Filing: 1982-12-06
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Granted: 1983-11-08
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Expires: 2002-12-06
Abstract
Abstract A polymer composition is disclosed and consists essentially of 100 parts by weight of an ethylene-alkyl acrylate copolymer and about 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid. The polymer compositions have a lower heat seal strength than the ethylene-alkyl acrylate copolymer contained therein.
Inventors
- 👤 Khalid A. Karim
- 👤 James H. Rea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:24
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L33/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A polymer composition consisting essentially of: (a) 100 parts by weight of an ethylene copolymer, and (b) About 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid; said ethylene copolymer having polymerized therein about 70-98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 2
Dependent Claim
113 words
A polymer composition consisting essentially of: (a) 100 parts by weight of an ethylene copolymer, and (b) About 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid; said ethylene copolymer having polymerized therein about 70-98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 3
Dependent Claim
26 words
A composition of claim 1 containing about 1.5 to 4 parts by weight of the polymer of the higher alkyl ester of acrylic or methacrylic acid.
Claim 4
Dependent Claim
24 words
A composition of claim 1 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
Claim 5
Dependent Claim
24 words
A composition of claim 2 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
Claim 6
Independent Claim
124 words
A method for lowering the seal strength of a film of an ethylene copolymer having polymerized therein about 70 to 98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid which consists essentially of uniformly dispersing about 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid in 100 parts by weight of said ethylene copolymer; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 7
Independent Claim
124 words
A method for lowering the seal strength of a film of an ethylene copolymer having polymerized therein about 70 to 98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid which consists essentially of uniformly dispersing about 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid in 100 parts by weight of said ethylene copolymer; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 8
Dependent Claim
24 words
The method of claim 5 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
Claim 9
Dependent Claim
152 words
In a method for heat sealing two films of an ethylene copolymer having polymerized therein about 70 to 98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid by heating an assembly of the two films under pressure; the improvement which comprises employing films consisting essentially of said ethylene copolymer having uniformly dispersed therein about 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid in 100 parts by weight of said ethylene copolymer, whereby the heat seal strength of said film is lowered; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 10
Dependent Claim
152 words
In a method for heat sealing two films of an ethylene copolymer having polymerized therein about 70 to 98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid by heating an assembly of the two films under pressure; the improvement which comprises employing films consisting essentially of said ethylene copolymer having uniformly dispersed therein about 1 to 5 parts by weight of a polymer of a higher alkyl ester of acrylic or methacrylic acid in 100 parts by weight of said ethylene copolymer, whereby the heat seal strength of said film is lowered; said polymer of a higher alkyl ester of acrylic or methacrylic acid being a homopolymer of said ester or a copolymer of said ester with ethylene in which the copolymer contains at least 25 weight % of said ester; the alkyl group of said ester containing about 8 to about 24 carbon atoms.
Claim 11
Dependent Claim
24 words
The method of claim 7 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
References Cited (Backward Citations)
US3350372A
Cited
GB1199958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |