US4299745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-component hot-melt adhesives
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 ethylene-vinyl acetate copolymers, tackifier resin, modified polyethylene and microcrystalline wax. These hot-melt adhesive compositions provide adhesives having a novel combination of properties such as high tensile, low elongation and good bonding properties for adhering polyethylene film to nonwoven substrates such as disposable diapers.
Inventors
- 👤 Darryl A. Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:36
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B27/04; B32B27/12; B32B27/32; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0846; C09J123/0853; C09J131/00; C09J131/02; C09J131/04; B32B2555/00; B32B2555/02; C08; C08L; C08L2666/00; C08L2666/02; C08L51/00; C08L51/06; C08L91/00; C08L91/06; C08L93/00; C08L93/04; C09J2301/00; C09J2301/30; C09J2301/304
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 5 to 25 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 50 to 30 percent by weight of at least one ethylene-vinyl acetate copolymer, (c) about 50 to 20 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 5 to 15 percent by weight of a microcrystalline wax.
Claim 2
Dependent Claim
108 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 5 to 25 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 50 to 30 percent by weight of at least one ethylene-vinyl acetate copolymer, (c) about 50 to 20 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 5 to 15 percent by weight of a microcrystalline wax.
Claim 3
Dependent Claim
23 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl acetate copolymer contains from about 5 to about 25 weight percent vinyl acetate.
Claim 4
Dependent Claim
26 words
An adhesive composition according to claim 2 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
98 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 10 to 15 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 40 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 40 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 10 to 15 percent by weight of microcrystalline wax.
Claim 7
Dependent Claim
98 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 10 to 15 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 40 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 40 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 10 to 15 percent by weight of microcrystalline wax.
Claim 8
Dependent Claim
23 words
An adhesive composition according to claim 5 wherein said ethylene-vinyl acetate copolymer contains from about 10 to about 18 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.
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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) | 1984-11-09 | 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 |