US4276111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of ethylene-alkyl acrylate copolymers with rosin esters
Assignee: Chevron USA Inc
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Filing: 1980-07-31
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Granted: 1981-06-30
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Expires: 2000-07-31
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 15 parts by weight of an ester formed from a rosin acid and ethylene glycol, propylene glycol, or glycerine. The polymer compositions have a lower heat sealing temperature 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
2026-10-26 09:18
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L93/00; C08L93/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
A polymer composition consisting essentially of: (a) 100 parts by weight of an ethylene copolymer, and (b) About 1 to 15 parts by weight of a rosin ester; said ethylene copolymer having polymerized therein about 70-98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol or glycerine.
Claim 2
Dependent Claim
69 words
A polymer composition consisting essentially of: (a) 100 parts by weight of an ethylene copolymer, and (b) About 1 to 15 parts by weight of a rosin ester; said ethylene copolymer having polymerized therein about 70-98 weight % of ethylene and the balance an alkyl ester of acrylic or methacrylic acid; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol or glycerine.
Claim 3
Dependent Claim
26 words
A composition of claim 1 containing 100 parts by weight of the ethylene copolymer and about 2 to 12 parts by weight of the rosin ester.
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
Dependent Claim
24 words
A composition of claim 1, 2, 3, or 4 in which the rosin ester is an ester formed from a rosin acid and glycerine.
Claim 7
Independent Claim
80 words
A method for lowering the seal temperature 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 15 parts by weight of a rosin ester in 100 parts by weight of said ethylene copolymer; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol, or glycerine.
Claim 8
Independent Claim
80 words
A method for lowering the seal temperature 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 15 parts by weight of a rosin ester in 100 parts by weight of said ethylene copolymer; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol, or glycerine.
Claim 9
Dependent Claim
21 words
The method of claim 6 in which about 2 to 12 parts of rosin ester are dispersed in the ethylene copolymer.
Claim 10
Dependent Claim
24 words
The method of claim 6 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
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.
Claim 12
Dependent Claim
108 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 15 parts by weight of a rosin ester in 100 parts by weight of said ethylene copolymer, whereby the heat sealing temperature of said film is lowered; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol, or glycerine.
Claim 13
Dependent Claim
108 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 15 parts by weight of a rosin ester in 100 parts by weight of said ethylene copolymer, whereby the heat sealing temperature of said film is lowered; said rosin ester being an ester formed from a rosin acid and ethylene glycol, propylene glycol, or glycerine.
Claim 14
Dependent Claim
24 words
The method of claim 10 in which the ethylene copolymer has polymerized therein about 78-83 weight % of ethylene and the balance methyl acrylate.
Claim 15
Dependent Claim
13 words
A film of a polymer composition of claim 1, 2, 3, or 4.
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |