US4430490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether polyols and their method of preparation
Assignee: Bayer Corp
•
Filing: 1982-08-10
•
Granted: 1984-02-07
•
Expires: 2002-08-10
Abstract
Abstract Polyether polyols and their method of preparation are disclosed. The polyether polyols are prepared by reacting polyhydric alcohols with an alkylene oxide in the presence of an alkaline catalyst. The reaction mixture is then treated with a hydroxy-carboxylic acid so as to neutralize the alkaline catalyst and form a clear reaction mixture without otherwise removing the alkaline catalyst. The polyether polyols are useful for the production of polyurethane foams.
Inventors
- 👤 Herman P. Doerge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
In a process for the preparation of a liquid polyether polyol wherein a polyhydric alcohol is reacted with an alkylene oxide in the presence of an alkaline catalyst, the improvement which comprises treating the polyether polyol with a hydroxy-carboxylic acid adapted to neutralize the alkaline catalyst to provide a soluble neutralized catalyst and produce a clear reaction mixture without otherwise removing the alkaline catalyst from the reaction mixture.
Claim 2
Dependent Claim
68 words
In a process for the preparation of a liquid polyether polyol wherein a polyhydric alcohol is reacted with an alkylene oxide in the presence of an alkaline catalyst, the improvement which comprises treating the polyether polyol with a hydroxy-carboxylic acid adapted to neutralize the alkaline catalyst to provide a soluble neutralized catalyst and produce a clear reaction mixture without otherwise removing the alkaline catalyst from the reaction mixture.
Claim 3
Dependent Claim
12 words
The process of claim 1 in which the polyhydric alcohol is sucrose.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein the alkylene oxide is selected from the class consisting of ethylene oxide, propylene oxide, or mixtures thereof.
Claim 5
Dependent Claim
13 words
The process of claim 1 in which the alkaline catalyst is sodium hydroxide.
Claim 6
Dependent Claim
28 words
The process of claim 1 in which the hydroxy-carboxylic acid is selected from the class consisting of lactic acid, salicylic acid, a substituted salicylic acid, or mixtures thereof.
Claim 7
Dependent Claim
12 words
The process of claim 5 in which the acid is lactic acid.
Claim 8
Dependent Claim
32 words
A liquid polyether polyol composition containing a salt of a hydroxy-carboxylic acid and an alkaline catalyst used in the preparation of the polyether polyol; the salt being soluble in the polyether polyol.
Claim 9
Dependent Claim
32 words
A liquid polyether polyol composition containing a salt of a hydroxy-carboxylic acid and an alkaline catalyst used in the preparation of the polyether polyol; the salt being soluble in the polyether polyol.
Claim 10
Dependent Claim
30 words
The polyether polyol composition of claim 7 in which the polyether polyol is formed from reacting a polyhydric alcohol with an alkylene oxide in the presence of the alkaline catalyst.
Claim 11
Dependent Claim
13 words
The polyether polyol composition of claim 8 wherein the polyhydric alcohol is sucrose.
Claim 12
Dependent Claim
26 words
The polyether polyol composition of claim 8 in which the alkylene oxide is selected from the class consisting of ethylene oxide, propylene oxide, or mixtures thereof.
Claim 13
Dependent Claim
15 words
The polyether polyol composition of claim 7 in which the alkaline catalyst is sodium hydroxide.
Claim 14
Dependent Claim
31 words
The polyether polyol composition of claim 7 in which the hydroxy-carboxylic acid is selected from the class consisting of lactic acid, salicylic acid or a substituted salicylic acid, including mixtures thereof.
Claim 15
Dependent Claim
14 words
The polyether polyol composition of claim 12 in which the acid is lactic acid.
Claim 16
Dependent Claim
28 words
A polyurethane composition comprising the reaction product of an organic polyisocyanate and the polyether polyol composition of any of claims 7, 8, 9, 10, 11, 12 or 13.
Claim 17
Dependent Claim
32 words
The polyurethane composition of claim 14 in which the organic polyisocyanate is selected from the class consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, mixtures of 2,4- and 2,6-toluene diisocyanate, and polymethylene polyphenyl isocyanate.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |