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US 4,380,502 AGranted
Process for the production of polyether polyols
AssigneeBayer Aktiengesellschaft
InventorsHanns P. Muller, Claus-Dieter Sommerfeld, Gernot Becker
Life of this patent
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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.
Claims6
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)).
Dependencies are inferred from the claim text.