US4380502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyether polyols
Assignee: Bayer AG
•
Filing: 1981-03-02
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Granted: 1983-04-19
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Expires: 2001-03-02
Abstract
Abstract Polyether polyols are made by alkoxylating a mixture which is from 20-80 weight % sucrose and 80-20 weight % formitol. The product polyether polyols have an average hydroxyl functionality of at least 3 and a hydroxyl number of from 28 to 1000. These polyether polyols are particularly useful for the production of rigid polyurethane foams.
Inventors
- 👤 Hanns P. Muller
- 👤 Claus-Dieter Sommerfeld
- 👤 Gernot Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/4816; C08G18/487; C08G18/4883; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A process for the production of polyether polyols having an average hydroxyl functionality of at least 3 and a hydroxyl number of from 28 to 1000 by alkoxylating a mixture comprising: (a) from 20 to 80% by weight of sucrose (based on the sum of (a) and (b)), and (b) from 80 to 20% by weight of formitol having an average hydroxyl functionality of at least 3 (based on the sum of (a) and (b)).
Claim 2
Dependent Claim
75 words
A process for the production of polyether polyols having an average hydroxyl functionality of at least 3 and a hydroxyl number of from 28 to 1000 by alkoxylating a mixture comprising: (a) from 20 to 80% by weight of sucrose (based on the sum of (a) and (b)), and (b) from 80 to 20% by weight of formitol having an average hydroxyl functionality of at least 3 (based on the sum of (a) and (b)).
Claim 3
Dependent Claim
44 words
The process of claim 1 wherein the mixture comprises: (a) from 40 to 75% by weight of sucrose (based on the sum of (a) and (b)), and (b) from 60 to 25% by weight of formitol (based on the sum of (a) and (b)).
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the formitol has an average hydroxyl functionality of from 3.3 to 5.7.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the mixture further comprises 0.5 to 3% by weight water (based on the total quantity of sucrose and formitol).
Claim 6
Dependent Claim
41 words
The process of claim 1 wherein the mixture further comprises 2-20% by weight of a compound taken from the group consisting of a low molecular weight polyol, mono-amine, poly-amine and mixtures thereof (based on the total quantity of sucrose and formitol).
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein the mixture has an average functionality with respect to alkylene oxides of from 4 to 7.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |