US4120916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous and crystalline polyolefin based hot-melt adhesive
Assignee: Eastman Chemical Co
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Filing: 1977-03-02
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Granted: 1978-10-17
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Expires: 1997-03-02
Abstract
Abstract The hot melt adhesives of the present invention comprise a blend of polyethylene, amorphous polypropylene and crystalline propylene containing polymer. These hot-melt adhesive compositions have a novel combination of properties such as short hot tack times and open times for the bonding of paraffin-modified corrugated board.
Inventors
- 👤 Max F. Meyer, Jr.
- 👤 Richard L. McConnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:14
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
An adhesive composition capable of being used as a hot-melt adhesive comprising a blend of (1) 3 to 20 weight percent polyethylene having a melting point of 95° to 115° C., a melt viscosity at 190° C. of about 100 to about 30,000 and a density of about 0.904 g/cm 3 to about 0.940 g/cm 3 , and an acid number of 0 to 60, (2) 94 to 60 weight percent of amorphous poly-alph-olefin, and (3) 3 to 20 weight percent of at least one member of the group consisting of crystalline polypropylene or crystalline propylene/ethylene copolymers containing not more than 20 percent by weight ethylene having a melt viscosity of about 100 to about 100,000 cp at 190° C.
Claim 2
Dependent Claim
120 words
An adhesive composition capable of being used as a hot-melt adhesive comprising a blend of (1) 3 to 20 weight percent polyethylene having a melting point of 95° to 115° C., a melt viscosity at 190° C. of about 100 to about 30,000 and a density of about 0.904 g/cm 3 to about 0.940 g/cm 3 , and an acid number of 0 to 60, (2) 94 to 60 weight percent of amorphous poly-alph-olefin, and (3) 3 to 20 weight percent of at least one member of the group consisting of crystalline polypropylene or crystalline propylene/ethylene copolymers containing not more than 20 percent by weight ethylene having a melt viscosity of about 100 to about 100,000 cp at 190° C.
Claim 3
Dependent Claim
24 words
An adhesive composition according to claim 1 wherein said polyethylene has a density of about 0.904 g/cm 3 to about 0.930 g/cm 3 .
Claim 4
Dependent Claim
13 words
An adhesive composition according to claim 2 wherein said amorphous poly-alpha-olefin is polypropylene.
Claim 5
Dependent Claim
22 words
An adhesive composition according to claim 2 wherein said poly-alpha-olefin is an amorphous propylene/ethylene copolymer containing less than 2 weight percent ethylene.
Claim 6
Dependent Claim
38 words
An adhesive composition according to claim 3 wherein said crystalline polypropylene or crystalline propylene/ethylene copolymers containing not more than 20 percent ethylene by weight has a melt viscosity of about 100 to about 100,000 cp at 190° C.
Claim 7
Dependent Claim
82 words
An adhesive composition capable of being used as a hot-melt adhesive comprising a blend of (1) 5 to 12 weight percent polyethylene having a melt viscosity of about 100 to about 30,000 cp at 190° C. and a density of about 0.904 g/cm 3 to about 0.940 g/cm 3 , (2) 90 to 76 weight percent of amorphous poly-alpha-olefin, and (3) 5 to 12 weight percent crystalline polypropylene having a melt viscosity of about 100 to about 100,000 cp at 190° C.
Claim 8
Dependent Claim
82 words
An adhesive composition capable of being used as a hot-melt adhesive comprising a blend of (1) 5 to 12 weight percent polyethylene having a melt viscosity of about 100 to about 30,000 cp at 190° C. and a density of about 0.904 g/cm 3 to about 0.940 g/cm 3 , (2) 90 to 76 weight percent of amorphous poly-alpha-olefin, and (3) 5 to 12 weight percent crystalline polypropylene having a melt viscosity of about 100 to about 100,000 cp at 190° C.
Claim 9
Dependent Claim
24 words
An adhesive composition according to claim 6 wherein said polyethylene has a density of about 0.904 g/cm 3 to about 0.930 g/cm 3 .
Claim 10
Dependent Claim
13 words
An adhesive composition according to claim 7 wherein said amorphous poly-alpha-olefin is polypropylene.
Claim 11
Dependent Claim
22 words
An adhesive composition according to claim 7 wherein said poly-alpha-olefin is an amorphous propylene/ethylene copolymer containing less than 2 weight percent ethylene.
Claim 12
Dependent Claim
38 words
An adhesive composition according to claim 8 wherein said crystalline polypropylene or crystalline propylene/ethylene copolymers containing not more tha 20 percent ethylene by weight has a melt viscosity of about 100 to about 100,000 cp at 190° 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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |