US3856889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends containing polyethylene and an unsaturated polycarboxylic acid modified polyolefin
Assignee: Eastman Kodak Co
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Filing: 1972-09-11
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Granted: 1974-12-24
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Expires: 1992-09-11
Abstract
Abstract Blends containing polyethylene having good adhesion and coating properties are obtained by preparing a blend of polyethylene and modified polyolefins. These blends have good melt stability, good color and good adhesion to paperboards and inks and find particular use in curtain coating operations. These blends are also good hot melt adhesives.
Inventors
- 👤 R Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/06; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L51/00; C08L51/06; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/06; C08L2666/00; C08L2666/02; C08L2666/24; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y10; Y10S; Y10S525/00; Y10S525/938; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A BLEND CONTAINING POLYETHYLENE USEFUL AS AN ADHESIVE AND COATING COMPOSITION, COMPRISING A BLEND OF (1) POLYETHYLENE HAVING A MELT VISCOSITY OF FROM 100 TO 100,000 CP. AT 190*C. AND A DENSITY OF FROM ABOUT 0.90 TO ABOUT 0.94 AND (2) ABOUT 0.5 TO 25 PERCENT BY WEIGHT OF MODIFIED POLYOLEFIN PREPARED FROM MONOOLEFINS HAVING AT LEAST 3 CARBON ATOMS, PREPARED BY REACTING A THERMALLY DEGRADED POLYOLEFIN WITH AN UNSATURATED POLYCARBOXYLIC ACID, SAID MODIFIED POLYOLEFIN HAVING A SAPONIFICATION NUMBER OF 6-60 AND A MELT VISCOSITY OF 100 TO 1500,000 CP. AT 190:C.
Claim 2
Dependent Claim
92 words
A BLEND CONTAINING POLYETHYLENE USEFUL AS AN ADHESIVE AND COATING COMPOSITION, COMPRISING A BLEND OF (1) POLYETHYLENE HAVING A MELT VISCOSITY OF FROM 100 TO 100,000 CP. AT 190*C. AND A DENSITY OF FROM ABOUT 0.90 TO ABOUT 0.94 AND (2) ABOUT 0.5 TO 25 PERCENT BY WEIGHT OF MODIFIED POLYOLEFIN PREPARED FROM MONOOLEFINS HAVING AT LEAST 3 CARBON ATOMS, PREPARED BY REACTING A THERMALLY DEGRADED POLYOLEFIN WITH AN UNSATURATED POLYCARBOXYLIC ACID, SAID MODIFIED POLYOLEFIN HAVING A SAPONIFICATION NUMBER OF 6-60 AND A MELT VISCOSITY OF 100 TO 1500,000 CP. AT 190:C.
Claim 3
Dependent Claim
17 words
A blend containing polyethylene according to claim 1 containing 1 to 10 percent by weight modified polyolefin.
Claim 4
Dependent Claim
14 words
A blend containing polyethylene of claim 2 wherein said modified polyolefin is maleated polypropylene.
Claim 5
Dependent Claim
26 words
A blend containing polyethylene of claim 3 wherein said maleated polypropylene has a saponification number of 30-60 and a melt viscosity of 300-600 cp. at 190*C.
Claim 6
Dependent Claim
27 words
A blend containing polyethylene of claim 4 wherein said maleated polypropylene has a saponification number of about 53.5 and a melt viscosity of 360 cp. at 190*C.
Claim 7
Dependent Claim
25 words
A blend containing polyethylene of claim 5 wherein said polyethylene has a melt viscosity of 36,000 cp. at 190*C. and a density of about 0.913.
Claim 8
Dependent Claim
18 words
A blend containing polyethylene of claim 6 containing from about 0.25 to 0.5 percent by weight pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate).
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |