US4582926A
Expired / Lapsed
US
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Process for the preparation of polyester or polyether-polyester polyol
Assignee: BASF SE
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Filing: 1984-04-09
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Granted: 1986-04-15
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Expires: 2004-04-09
Abstract
Abstract In order to prepare polyester or polyetherpolyester polyols, polyols, preferably di- to hexafunctional polyether polyols having hydroxyl numbers from 15 to 250 are esterified with at least one carboxylic acid anhydride, preferably phthalic acid anhydride, in the presence of N-methylimidazole, triethylenediamine, and/or triphenylphosphine as catalysts to form a carboxylic acid half-ester, and said half-ester is then oxyalkylated with at least one alkylene oxide, preferably ethylene oxide, in the presence of N-methylimidazole, triethylenediamine, triphenylphosphine, thiodialkylene glycol, employing a mixture of at least two of the compounds cited as catalysts.
Inventors
- 👤 Wolfgang Straehle
- 👤 Matthias Marx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:18
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2669; C08G65/2675; C08G63/00; C08G63/66; C08G63/78; C08G63/82; C08G63/87; C08G65/2603; C08G65/2615; C08G65/2672
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A process for the preparation of a polyester or polyether-polyester polyol by reacting: (a) a polyol with carboxylic acid anhydride to form carboxylic acid half-ester, and (b) oxyalkylating the carboxylic acid half-ester with alkylene oxide wherein step (a) takes place in the presence of from 0.05 part to 2.0 parts by weight per 100 parts of the reaction mixture of a catalyst selected from the group consisting of N-methylimidazole, triethylenediamine, triphenylphosphine, and mixtures thereof at temperatures from 50° C. to 240° C., and wherein 1 mole of said polyol is reacted with 1 to 6 moles of said anhydride with 1 to 6 equivalents of hydroxyl groups present per equivalent of anhydride group.
Claim 2
Dependent Claim
113 words
A process for the preparation of a polyester or polyether-polyester polyol by reacting: (a) a polyol with carboxylic acid anhydride to form carboxylic acid half-ester, and (b) oxyalkylating the carboxylic acid half-ester with alkylene oxide wherein step (a) takes place in the presence of from 0.05 part to 2.0 parts by weight per 100 parts of the reaction mixture of a catalyst selected from the group consisting of N-methylimidazole, triethylenediamine, triphenylphosphine, and mixtures thereof at temperatures from 50° C. to 240° C., and wherein 1 mole of said polyol is reacted with 1 to 6 moles of said anhydride with 1 to 6 equivalents of hydroxyl groups present per equivalent of anhydride group.
Claim 3
Dependent Claim
12 words
The process of claim 1, wherein the catalyst is N-methylimidazole and/or triethylenediamine.
Claim 4
Dependent Claim
36 words
The process of claim 1, wherein the oxyalkylation step (b) takes place in the presence of a catalyst selected from the group consisting of at least two of the following N-methylimidazole, triethylenediamine, triphenylphosphine, and thio-dialkylene glycol.
Claim 5
Dependent Claim
49 words
The process of claim 1, wherein the catalyst in step (a) is selected from the group consisting of N-methylimidazole, triethylenediamine and mixtures thereof and the catalyst of step (b) is selected from the group consisting of a mixture of N-methylimidazole and triethylenediamine and a mixture of N-methylimidazole and triphenylphosphine.
Claim 6
Dependent Claim
23 words
The process of claim 1, wherein di- to hexafunctional polyether polyols having hydroxyl numbers from 15 to 250 are used as the polyols.
Claim 7
Dependent Claim
16 words
The process of claim 1, where phthalic acid anhydride is used as the carboxylic acid anhydride.
Claim 8
Dependent Claim
14 words
The process of claim 1, wherein ethylene oxide is used as the alkylene oxide.
Claim 9
Dependent Claim
22 words
The process of claim 1, wherein one mole of alkylene oxide is used per carboxyl group to oxyalkylate the carboxylic acid half-ester.
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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |