US4127619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene containing hot melt adhesives
Assignee: Eastman Chemical Co
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Filing: 1977-08-05
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Granted: 1978-11-28
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Expires: 1997-08-05
Abstract
Abstract The hot melt adhesives of the present invention comprise a blend of at least one polyethylene, a tackifying resin, and a high density, low viscosity polyethylene wax having a molecular weight of about 1000. This hot melt adhesive has a novel combination of properties including excellent elevated temperature properties.
Inventors
- 👤 Darryl A. Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:27
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/06; C08; C08L; C08L91/00; C08L91/06; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 50 to 80 percent by weight of at least one polyethylene having a melt viscosity of 500 to 20,000 centipoise at 190° C. and a density greater than 0.90 to about 0.97 g/cc., (b) about 13 to 35 percent by weight of at least one tackifier resin selected from the group consisting of hydrocarbon resin and polyterpene resin, and (c) about 7 to 15 percent by weight of a high density, low viscosity polyethylene wax having a molecular weight of about 800 to 1200 and a Ring and Ball softening point in the range of 110° to 120° C.
Claim 2
Dependent Claim
117 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 50 to 80 percent by weight of at least one polyethylene having a melt viscosity of 500 to 20,000 centipoise at 190° C. and a density greater than 0.90 to about 0.97 g/cc., (b) about 13 to 35 percent by weight of at least one tackifier resin selected from the group consisting of hydrocarbon resin and polyterpene resin, and (c) about 7 to 15 percent by weight of a high density, low viscosity polyethylene wax having a molecular weight of about 800 to 1200 and a Ring and Ball softening point in the range of 110° to 120° C.
Claim 3
Dependent Claim
35 words
An adhesive composition according to claim 1 wherein said high density, low viscosity polyethylene wax has a melting point within the range of 85° C. to 120° C. and a molecular weight of about 1000.
Claim 4
Dependent Claim
24 words
An adhesive composition according to claim 2 wherein said adhesive has a viscosity of from about 750 to about 100,000 centipoise at 177° C.
Claim 5
Dependent Claim
15 words
An adhesive composition according to claim 3 wherein said hydrocarbon resin is DAC-B hydrocarbon resin.
Claim 6
Dependent Claim
108 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 62 weight percent of at least one polyethylene having a melt viscosity of 500 to 20,000 centipoise at 190° C. and a density greater than about 0.90 to 0.97 g/cc., (b) about 27 weight percent of at least one tackifier resin selected from the group consisting of hydrocarbon resin and polyterpene resin, and (c) about 11 weight percent of a high density, low viscosity polyethylene wax having a molecular weight of about 800 to 1200 and a Ring and Ball softening point in the range of 110° to 120° C.
Claim 7
Dependent Claim
108 words
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (a) about 62 weight percent of at least one polyethylene having a melt viscosity of 500 to 20,000 centipoise at 190° C. and a density greater than about 0.90 to 0.97 g/cc., (b) about 27 weight percent of at least one tackifier resin selected from the group consisting of hydrocarbon resin and polyterpene resin, and (c) about 11 weight percent of a high density, low viscosity polyethylene wax having a molecular weight of about 800 to 1200 and a Ring and Ball softening point in the range of 110° to 120° C.
Claim 8
Dependent Claim
36 words
An adhesive composition according to claim 5 wherein said high density polyethylene wax has a melting point within the range of 85° C. to 120° C. which is product of the degradation of high density polyethylene.
Claim 9
Dependent Claim
25 words
An adhesive composition according to claim 6 wherein said polyethylene has a melt viscosity of from about 750 to about 100,000 centipoise at 177° C.
Claim 10
Dependent Claim
15 words
An adhesive composition according to claim 7 wherein said hydrocarbon resin is DAC-B hydrocarbon resin.
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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |