US4358557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four component hot-melt adhesives
Assignee: Eastman Chemical Co
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Filing: 1982-03-08
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Granted: 1982-11-09
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Expires: 2002-03-08
Abstract
Abstract The hot-melt adhesives of the present invention comprise a blend of ethylene-vinyl acetate copolymer, hydrocarbon tackifier resin, aromatic low softening point tackifying resin and paraffin wax. These hot-melt adhesive compositions provide adhesives especially useful for bonding polyethylene film to a nonwoven support. The bonds provided by this adhesive have a novel combination of properties such as good static shear lap bond strength, low elongation and good elevated temperature properties.
Inventors
- 👤 Brenda J. Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; B32B2323/00; B32B2323/04; B32B2325/00; B32B2367/00; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 10 to 20 percent by weight of at least one aromatic hydrocarbon resin having a softening point of less than 50° C., (b) about 30 to 40 percent by weight of at least one ethylene-vinyl acetate copolymer, (c) about 35 to 55 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 2.5 to 10 percent by weight of a paraffin wax having a Ring and Ball Softening Point of about 120° C. to 160° C.
Claim 2
Dependent Claim
110 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 10 to 20 percent by weight of at least one aromatic hydrocarbon resin having a softening point of less than 50° C., (b) about 30 to 40 percent by weight of at least one ethylene-vinyl acetate copolymer, (c) about 35 to 55 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 2.5 to 10 percent by weight of a paraffin wax having a Ring and Ball Softening Point of about 120° C. to 160° C.
Claim 3
Dependent Claim
23 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl acetate copolymer contains from about 18 to about 40 weight percent vinyl acetate.
Claim 4
Dependent Claim
23 words
An adhesive composition according to claim 2 wherein said aromatic hydrocarbon resin has a molecular weight of from about 300 to about 6,000.
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
23 words
An adhesive composition according to claim 4 wherein said hydrocarbon tackifier resin is DAC-B hydrocarbon resin having a softening point of 100° C.
Claim 7
Dependent Claim
102 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 8 to 15 weight percent of at least one aromatic hydrocarbon resin having a softening point of less than 50° C., (b) about 30 to 35 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 45 to 50 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 5 percent by weight of paraffin wax having a Ring and Ball softening point of about 140° C. to 150° C.
Claim 8
Dependent Claim
102 words
An adhesive composition capable of being used as hot melt adhesive comprising a blend of (a) about 8 to 15 weight percent of at least one aromatic hydrocarbon resin having a softening point of less than 50° C., (b) about 30 to 35 weight percent of at least one ethylene-vinyl acetate copolymer, (c) about 45 to 50 weight percent of at least one tackifier selected from the group consisting of hydrocarbon resin, polyterpene resin or rosin ester resin, and (d) about 5 percent by weight of paraffin wax having a Ring and Ball softening point of about 140° C. to 150° C.
Claim 9
Dependent Claim
23 words
A adhesive composition according to claim 5 wherein said ethylene-vinyl acetate copolymer contains from about 25 to about 35 weight percent vinyl acetate.
Claim 10
Dependent Claim
23 words
An adhesive composition according to claim 6 wherein said aromatic hydrocarbon resin has a molecular weight of from about 750 to about 1,000.
Claim 11
Dependent Claim
16 words
An adhesive composition according to claim 7 wherein said tackifier resin is a hydrocarbon tackifier resin.
Claim 12
Dependent Claim
22 words
An adhesive composition according to claim 9 wherein said hydrocarbon resin is DAC-B hydrocarbon resin having a softening point of 100° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |