US4719260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt adhesive compositions
Assignee: Eastman Chemical Co
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Filing: 1987-02-09
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Granted: 1988-01-12
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Expires: 2007-02-09
Abstract
Abstract Disclosed is a hot-melt adhesive composition comprising from about 55 to about 95 weight % of an amorphous polymer containing at least 30% propylene and from about 45 to about 5 weight % of a graft copolymer of (a) a saturated, polycyclic hydrocarbon resin, and (b) maleic anhydride.
Inventors
- 👤 Richard K. Stuart, Jr.
- 👤 Bruce W. Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/16; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A hot-melt adhesive composition comprising (1) from about 55 to about 95 weight % of an amorphous polymer containing at least 30% propylene, and (2) from about 45 to about 5 weight % of a graft copolymer of (a) a saturated, polycyclic hydrocarbon resin having a viscosity of about 100-2000 cps at 190° C. and a ring and ball softening point of about 75°-150° C., and (b) maleic anhydride, said graft copolymer having an acid number of about 0.5-60.
Claim 2
Dependent Claim
79 words
A hot-melt adhesive composition comprising (1) from about 55 to about 95 weight % of an amorphous polymer containing at least 30% propylene, and (2) from about 45 to about 5 weight % of a graft copolymer of (a) a saturated, polycyclic hydrocarbon resin having a viscosity of about 100-2000 cps at 190° C. and a ring and ball softening point of about 75°-150° C., and (b) maleic anhydride, said graft copolymer having an acid number of about 0.5-60.
Claim 3
Dependent Claim
19 words
A hot-melt adhesive composition according to claim 1 wherein said amorphous polymer is a copolymer of propylene and butene.
Claim 4
Dependent Claim
19 words
A hot-melt adhesive composition according to claim 1 wherein said graft copolymer has an acid number of about 1.0-42.
Claim 5
Dependent Claim
44 words
A hot-melt adhesive composition according to claim 1 wherein said graft copolymer of polycyclic hydrocarbon resin has a viscosity of about 150-1000 cps at 190° C., an acid number of greater than 0.1 and a ring and ball softening point of about 90°-130° C.
Claim 6
Dependent Claim
30 words
A hot-melt adhesive according to claim 1 wherein the amorphous polymer is a copolymer containing up to 70% of at least one α-olefin other than propylene having 2-6 carbon atoms.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |