Patent US4719260A successfully refreshed from Google Patents.
US4719260A
Expired / Lapsed
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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 09:24
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.
References Cited (Backward Citations)
US2208321A
Cited
US2608550A
Cited
US3437629A
Cited
US3240762A
Cited
US3700768A
Cited
US3701760A
Cited
US4086198A
Cited
US3984381A
Cited
US4217428A
Cited
US4358564A
Cited
US4533700A
Cited
US4670504A
Cited
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 |