US4299930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-component hot melt adhesives having excellent high temperature properties
Assignee: Eastman Chemical Co
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Filing: 1980-04-07
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Granted: 1981-11-10
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Expires: 2000-04-07
Abstract
Abstract The hot melt adhesives of the present invention comprise a blend of at least one modified polyethylene resin, an ethylene/vinyl acetate copolymer, a tackifying resin, and an ethylene/propylene rubber. This hot melt adhesive has a novel combination of properties including excellent elevated temperature properties which also provides excellent adhesion to nonporous substrates such as fluorocarbon treated paper which is used as an oil and grease barrier in multiwall bags.
Inventors
- 👤 Brenda J. Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B27/04; B32B29/00; B32B29/06; C; C09; C09J; C09J151/00; C09J151/06; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 40 to 50 percent by weight of at least one modified polyethylene having a saponification number of about 3 to 60 prepared by reacting polyethylene with an unsaturated polycarboxylic acid, anhydride or ester thereof, (b) about 6 to 10 percent by weight of at least one ethylenevinyl acetate copolymer, (c) about 50 to 30 percent by weight of at least one tackifier resin selected from the group consisting of hydrocarbon resin, polyterpene resin and rosin ester resin, and (d) about 7 to 15 percent by weight of an ethylene/propylene rubber.
Claim 2
Dependent Claim
108 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 40 to 50 percent by weight of at least one modified polyethylene having a saponification number of about 3 to 60 prepared by reacting polyethylene with an unsaturated polycarboxylic acid, anhydride or ester thereof, (b) about 6 to 10 percent by weight of at least one ethylenevinyl acetate copolymer, (c) about 50 to 30 percent by weight of at least one tackifier resin selected from the group consisting of hydrocarbon resin, polyterpene resin and rosin ester resin, and (d) about 7 to 15 percent by weight of an ethylene/propylene rubber.
Claim 3
Dependent Claim
23 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl acetate copolymer contains from about 30 to about 45 weight percent vinyl acetate.
Claim 4
Dependent Claim
26 words
An adhesive composition according to claim 1 wherein said modified polyethylene has a melt viscosity of from about 750 to about 100,000 centipoise at 177° C.
Claim 5
Dependent Claim
16 words
An adhesive composition according to claim 3 wherein said tackifier resin is a hydrocarbon tackifier resin.
Claim 6
Dependent Claim
103 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 42 to 46 weight percent of at least one modified polyethylene having a saponification number of about 3 to 60 prepared by reacting polyethylene with an unsaturated polycarboxylic acid, anhydride or ester thereof, (b) about 7 to 9 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 35 to 45 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 7 to 10 percent by weight of an ethylene/propylene rubber.
Claim 7
Dependent Claim
103 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 42 to 46 weight percent of at least one modified polyethylene having a saponification number of about 3 to 60 prepared by reacting polyethylene with an unsaturated polycarboxylic acid, anhydride or ester thereof, (b) about 7 to 9 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 35 to 45 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 7 to 10 percent by weight of an ethylene/propylene rubber.
Claim 8
Dependent Claim
19 words
An adhesive composition according to claim 5 wherein said ethylene-vinyl acetate copolymer contains about 40 weight percent vinyl acetate.
Claim 9
Dependent Claim
26 words
An adhesive composition according to claim 6 wherein said modified polyethylene has a melt viscosity of from about 750 to about 100,000 centipoise at 177° C.
Claim 10
Dependent Claim
16 words
An adhesive composition according to claim 7 wherein said tackifier resin is a hydrocarbon tackifier resin.
References Cited (Backward Citations)
US3468978A
Cited
US3644254A
Cited
US3658948A
Cited
US3868433A
Cited
US3886234A
Cited
US3856889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |