Patent US4264756A successfully refreshed from Google Patents.
US4264756A
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Substantially amorphous olefin copolymers and compatible tackifying resins useful as hot-melt, pressure-sensitive adhesives
Assignee: Eastman Chemical Co
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Filing: 1979-08-06
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Granted: 1981-04-28
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Expires: 1999-08-06
Abstract
Abstract This invention relates to blends of compatible tackifiers with substantially amorphous olefin copolymers containing at least one C 3 to C 5 linear α-olefin and 40 to 60 mole percent of at least one C 6 to C 10 linear α-olefin which are useful as hot-melt, pressure-sensitive adhesives. The unmodified copolymer base resins have melt viscosities in the range of >75,000 cp up to about 1,000,000 cp at 190° C. The addition of the compatible tackifiers to the copolymer base resin causes a dramatic and unexpected increase in the shear adhesion failure time in addition to improved coatability as well as substantial increases in probe tack and peel adhesion values of the copolymers.
Inventors
- 👤 Jimmy R. Trotter
- 👤 Frederick B. Joyner
- 👤 Richard L. McConnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:15
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/16; C09J123/18; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A substantially amorphous copolymer containing at least one C 3 to C 5 linear alpha-olefin and 40 to 60 mole percent of at least one higher alpha-olefin of 6 to 10 carbon atoms, said copolymer having a melt viscosity greater than 76,000 to 1,000,000 centipoise at 190° C., a density of 0.85-0.86, and a glass transition temperature of -30° to -45° C., and said copolymers show little or no crystallinity by either X-ray or DSC techniques.
Claim 2
Dependent Claim
76 words
A substantially amorphous copolymer containing at least one C 3 to C 5 linear alpha-olefin and 40 to 60 mole percent of at least one higher alpha-olefin of 6 to 10 carbon atoms, said copolymer having a melt viscosity greater than 76,000 to 1,000,000 centipoise at 190° C., a density of 0.85-0.86, and a glass transition temperature of -30° to -45° C., and said copolymers show little or no crystallinity by either X-ray or DSC techniques.
Claim 3
Dependent Claim
19 words
A substantially amorphous copolymer according to claim 1 wherein said C 3 to C 5 linear alpha-olefin is propylene.
Claim 4
Dependent Claim
19 words
A substantially amorphous copolymer according to claim 1 wherein said C 3 to C 5 linear alpha-olefin is butene-1.
Claim 5
Dependent Claim
19 words
A substantially amorphous copolymer according to claim 1 wherein said C 3 to C 5 linear alpha-olefin is pentene-1.
Claim 6
Dependent Claim
20 words
A substantially amorphous copolymer according to claim 2 wherein said higher alpha-olefin of 6 to 10 carbon atoms is hexene-1.
Claim 7
Dependent Claim
20 words
A substantially amorphous copolymer according to claim 2 wherein said higher alpha-olefin of 6 to 10 carbon atoms is heptene-1.
Claim 8
Dependent Claim
20 words
A substantially amorphous copolymer according to claim 2 wherein said higher alpha-olefin of 6 to 10 carbon atoms is octene-1.
Claim 9
Dependent Claim
20 words
A substantially amorphous copolymer according to claim 2 wherein said higher alpha-olefin of 6 to 10 carbon atoms is nonene-1.
Claim 10
Dependent Claim
20 words
A substantially amorphous copolymer according to claim 2 wherein said higher alpha-olefin of 6 to 10 carbon atoms is decene-1.
References Cited (Backward Citations)
US4072812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |