Patent US5574091A successfully refreshed from Google Patents.
US5574091A
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Aqueous dispersions of olefin copolymers
Assignee: Dow Chemical Co
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Filing: 1995-06-05
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Granted: 1996-11-12
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Expires: 2015-06-05
Abstract
Abstract Artificial latexes that are film-forming at room temperature can be prepared from a copolymer of ethylene and a C 3 -C 20 alpha olefin. The copolymer preferably contains no polar substituents, which are generally necessary to make useful latexes from polyethylene.
Inventors
- 👤 Brian W. Walther
- 👤 Jim R. Bethea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:38
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A film-forming, artificial latex comprising an aqueous dispersion of a copolymer of ethylene and a C 3 -C 20 alpha-olefin, the olefin polymer being characterized by having: a) an absence of polar groups; b) a polydispersity index from about 1.5 to about 2.5; c) an I 10 /I 2 of at least 6; d) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear olefin polymer having the same I 2 and polydispersity index; e) a weight average molecular weight of at least 45,000; and f) a density of about 0.85 to about 0.9 g/cm 3 .
Claim 2
Dependent Claim
118 words
A film-forming, artificial latex comprising an aqueous dispersion of a copolymer of ethylene and a C 3 -C 20 alpha-olefin, the olefin polymer being characterized by having: a) an absence of polar groups; b) a polydispersity index from about 1.5 to about 2.5; c) an I 10 /I 2 of at least 6; d) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear olefin polymer having the same I 2 and polydispersity index; e) a weight average molecular weight of at least 45,000; and f) a density of about 0.85 to about 0.9 g/cm 3 .
Claim 3
Dependent Claim
19 words
The film-forming, artificial latex of claim 1 wherein the copolymer has a density of about 0.86 to about 0.88.
Claim 4
Dependent Claim
18 words
The film-forming, artificial latex of claim 1 wherein the copolymer is an ethylene-1-octene, ethylene-1-butene, ethylene-1-hexene, or ethylene-4-methyl-1-pentene copolymer.
Claim 5
Dependent Claim
14 words
The film-forming, artificial latex of claim 1 wherein the copolymer is an ethylene-1-octene copolymer.
Claim 6
Dependent Claim
57 words
The film-forming, artificial latex of claim 1 wherein the dispersion is stabilized with a sulfate of an ethoxylated phenol represented by the formula: X-Φ-O-(CH.sub.2 -CH.sub.2 -O).sub.n -SO.sub.3.sup.- Z.sup.+ wherein X is a C 6 -C 18 linear or branched alkyl group; Φ is phenylene; n is from 4 to 32; and Z is sodium, potassium, or ammonium.
Claim 7
Dependent Claim
13 words
The film-forming, artificial latex of claim 1 that is film-forming at room temperature.
References Cited (Backward Citations)
US3360599A
Cited
US3418265A
Cited
US3645992A
Cited
US3503917A
Cited
US3734686A
Cited
US4123403A
Cited
US5037864A
Cited
US5272236A
Cited
US5278272A
Cited
WO1994018263A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-12 | 2000-05-13 | 2000-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-12 | 2004-05-13 | 2004-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-12 | 2008-05-13 | 2008-11-12 | $7700.00 | Window Closed / Lapsed |