Patent US5594072A successfully refreshed from Google Patents.
US5594072A
Expired / Lapsed
US
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Liquid star polymers having terminal hydroxyl groups
Assignee: Kraton Polymers US LLC
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Filing: 1995-08-01
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Granted: 1997-01-14
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Expires: 2015-08-01
Abstract
Abstract Star polymers of isoprene or butadiene having terminal hydroxyl groups have reduced viscosity when the hydroxyl groups are located on polymeric arms that are grown from the core of the star molecules. The polymers are useful in making coatings, sealants, and binders.
Inventors
- 👤 Dale L. Handlin, Jr.
- 👤 Carl L. Willis
- 👤 Daniel E. Goodwin
- 👤 David J. St. Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08F; C08F297/00; C08F297/02; C08F297/023; C08F8/00; C08F8/04; C08G18/40; C08G18/62; C08G18/6204; C08G18/6208; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A polymer, comprising: the structure: ##STR3## wherein each A is a hydrogenated or unsaturated block or segment comprising a preponderance of a polymerized conjugated diene having a peak molecular weight from 400 to 40,000 as measured by GPC, t is from 2 to 30, B is the residue of a hydrogenated or unsaturated monolithium conjugated diene polymer having a peak molecular weight from 1,500 to 15,000 as measured by GPC, Y is a crosslinked core comprising a compound having at least two independently polymerized vinyl groups, r>t, and 0<u<(r-t).
Claim 2
Dependent Claim
89 words
A polymer, comprising: the structure: ##STR3## wherein each A is a hydrogenated or unsaturated block or segment comprising a preponderance of a polymerized conjugated diene having a peak molecular weight from 400 to 40,000 as measured by GPC, t is from 2 to 30, B is the residue of a hydrogenated or unsaturated monolithium conjugated diene polymer having a peak molecular weight from 1,500 to 15,000 as measured by GPC, Y is a crosslinked core comprising a compound having at least two independently polymerized vinyl groups, r>t, and 0<u<(r-t).
Claim 3
Dependent Claim
36 words
The polymer of claim 1, wherein each block A is hydrogenated 1,3-butadiene having a peak molecular weight from 500 to 3,000 and each B is hydrogenated 1,3-butadiene having a peak molecular weight from 3,000 to 7,000.
Claim 4
Dependent Claim
17 words
The polymer of claim 2, wherein each A block and each B is at least 90% hydrogenated.
Claim 5
Dependent Claim
25 words
The polymer of claim 3, wherein the 1,2-polymerization of the hydrogenated butadiene in each A block and in each B is between 40% and 60%.
Claim 6
Dependent Claim
12 words
The polymer of claim 4, wherein t is from 2 to 10.
Claim 7
Dependent Claim
24 words
The polymer of claim 5, wherein the peak molecular weight of the polymer molecule is from 30,000 to 150,000 as measured by light scattering.
Claim 8
Dependent Claim
17 words
The polymer of claim 6, wherein the polymer has a viscosity of 10,000 poise at room temperature.
References Cited (Backward Citations)
CA716645A
Cited
US3280084A
Cited
US3507934A
Cited
US3719730A
Cited
US3652732A
Cited
US3976628A
Cited
USRE27145E
Cited
US3862251A
Cited
US3661873A
Cited
US3755276A
Cited
US3862097A
Cited
US3978160A
Cited
US3851000A
Cited
US3959412A
Cited
US3985830A
Cited
US3985830B1
Cited
US3949020A
Cited
US4010226A
Cited
US4304886A
Cited
US4370433A
Cited
US4444953B1
Cited
US4444953A
Cited
US5061758A
Cited
US5070131A
Cited
US5229464A
Cited
US5166277A
Cited
US5242989A
Cited
US5300586A
Cited
US5247026A
Cited
US5393843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-14 | 2000-07-15 | 2001-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-14 | 2004-07-15 | 2005-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-14 | 2008-07-15 | 2009-01-14 | $7700.00 | Window Closed / Lapsed |