US5070125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyether polyols with reduced unsaturation
Assignee: Dow Chemical Co
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Filing: 1991-01-08
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Granted: 1991-12-03
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Expires: 2011-01-08
Abstract
Abstract Polyether polyols having an equivalent weight of from about 200 to about 5000 are prepared by the process of this invention. The process uses barium- or strontium-containing alkoxylation catalysts to provide products with reduced unsaturation in comparison to similar products produced with potassium hydroxide catalysis. The use of these catalysts also increases the capping efficiency with ethylene oxide to provide products with a higher primary hyroxyl content for the same weight percentage of ethylene oxide cap.
Inventors
- 👤 Albert J. Heuvelsland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:39
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4213; C08G18/4225; C08G18/48; C08G18/4866; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/6644; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/2645; C08G65/2648; C08G2110/00; C08G2110/0008; C08G2110/0025; C08G2110/0041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A polyurethane polymer prepared by the reaction of a polyisocyanate with a polyoxyalkylene polyol composition wherein said composition comprises (a) a polyoxyalkylene polyol having an equivalent weight from about 200 to about 5,000 and an average functionality of about 2 to about 8, and (b) from about 0.5 to about 20,000 ppm of a metal catalyst selected from the group consisting of barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, or mixtures thereof.
Claim 2
Dependent Claim
76 words
A polyurethane polymer prepared by the reaction of a polyisocyanate with a polyoxyalkylene polyol composition wherein said composition comprises (a) a polyoxyalkylene polyol having an equivalent weight from about 200 to about 5,000 and an average functionality of about 2 to about 8, and (b) from about 0.5 to about 20,000 ppm of a metal catalyst selected from the group consisting of barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, or mixtures thereof.
References Cited (Backward Citations)
US4134610A
Cited
US4920167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |