US4340528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmented polyolefin compositions
Assignee: Eastman Chemical Co
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Filing: 1980-10-31
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Granted: 1982-07-20
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Expires: 2000-10-31
Abstract
Abstract Disclosed are polyolefin compositions comprising polyethylene or polypropylene, at least one pigment in an amount sufficient to provide color to said polyolefin, and from about 0.1 to about 4.0%, based on the weight of said polyolefin, of a polyester. Use of the polyester in the composition permits much less pigment to be used.
Inventors
- 👤 Harold P. Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0041; C08L23/04; C08L23/06; C08L23/10; C08L67/00; C08L67/02; C08L2207/00; C08L2207/06; C08L2207/062; C08L2207/066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
Polyolefin composition comprising polyethylene or polypropylene having a density of between about 0.90 and about 0.98, at least one pigment in an amount sufficient to provide color to said polyolefin, and from about 0.1 to about 4.0%, based on the weight of said polyolefin, of a polyester having an I.V. of from about 0.6 to about 1.0, a melting point of from about 90° to about 150° C. and a melt index of from about 10 to about 100.
Claim 2
Dependent Claim
79 words
Polyolefin composition comprising polyethylene or polypropylene having a density of between about 0.90 and about 0.98, at least one pigment in an amount sufficient to provide color to said polyolefin, and from about 0.1 to about 4.0%, based on the weight of said polyolefin, of a polyester having an I.V. of from about 0.6 to about 1.0, a melting point of from about 90° to about 150° C. and a melt index of from about 10 to about 100.
Claim 3
Dependent Claim
26 words
Composition according to claim 1 wherein said polyester is present in an amount of about 1% to about 3% based on the weight of said polyolefin.
Claim 4
Dependent Claim
18 words
Composition according to claim 1 wherein said polyolefin has a density of from about 0.91 to about 0.96.
Claim 5
Dependent Claim
20 words
Composition according to claim 1 wherein said polyolefin is polyethylene having a Melt Index of about 0.1 to about 24.0.
Claim 6
Dependent Claim
20 words
Composition according to claim 1 wherein said polyolefin is polypropylene having a Flow Rate of about 0.1 to about 24.0.
Claim 7
Dependent Claim
35 words
Composition according to claim 1 wherein said polyester is derived at least in part from terephthalic acid as the dicarboxylic acid component and at least in part from 1,4-butanediol or 1,6-hexanediol as the glycol component.
Claim 8
Dependent Claim
24 words
Composition according to claim 1 wherein said pigment is present in an amount of less than 0.5% based on the weight of said polyolefin.
References Cited (Backward Citations)
US3223752A
Cited
US3419638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |