Polyoxyalkylene polyether amino alcohols containing a tertiary hydroxyl group and flexible polyurethanes made therefrom
AssigneeTexaco Inc.
InventorsMichael Cuscurida, Howard P. Klein
Life of this patent
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Abstract
Polyoxyalkylene polyether amino alcohols are prepared which have the following formula: ##STR1## wherein, R represents hydrogen or a methyl or an ethyl group, x represents a number having an average value of about 1 to about 4 and n represents a number having an average value of about 1 to about 40. The polyoxyalkylene polyether amino alcohol is prepared by alkoxylating a glycol that contains one tertiary hydroyxl group and also a primary or secondary hydroxyl group in order to form an alkoxylated intermediate and by then reductively aminating the alkoxylated intermediate.
Claims10
A method for preparing a polyoxyalkylene polyether amino alcohol containing a tertiary hydroxyl group which comprises the steps of:
- (a) alkoxylating a glycol feedstock under basic alkoxylation conditions with an epoxide to provide a polyoxyalkylene polyether glycol intermediate, and
- (b) reductively aminating said polyoxyalkylene polyether glycol under reductive amination conditions in the presence of a nickel, copper, chromia reductive amination catalyst, ammonia and hydrogen to thereby provide said polyoxyalkylene polyether amino alcohol containing said tertiary hydroxyl group,
- (c) said glycol feedstock having the formula:
- ##STR7## (d) said epoxide having the formula:
- ##STR8## (e) said polyoxyalkylene polyether intermediate having the formula:
- ##STR9## (f) said polyoxyalkylene polyether amino alcohol having the formula:
- ##STR10## (g) wherein, in said formulae, R represents hydrogen or a methyl or an ethyl group, x represents a number having an average value of about 1 to about 4 and n represents a number having an average value of about 1 to about 40.
In a method for preparing a flexible polyurethane wherein a polyoxypropylene polyether polyol is reacted with an excess of an organic polyisocyanate in the presence of effective amounts of a catalyst, the improvement which comprises:
- replacing from about 0.5 to about 5 wt. % of said polyol with a chain extender having the formula:
- ##STR11## wherein R represents hydrogen or a methyl or an ethyl group, x is a number having an average value between about 1 and 4 and n represents a number having an average value between about 1 and about 40.
In a flexible polyurethane foam prepared by reacting a polyoxypropylene polyether polyol with an excess of an organic polyisocyanate in the presence of effective amounts of a catalyst,
- the improvement which comprises a flexible foam wherein
- (a) the polyoxypolypropylene polyether polyol is a polyoxypropylene polyether polyol having a hydroxyl number between about 20 and 60, a functionality of from about 2 to 8, a molecular weight within the range of about 2,000 to about 8,000 and having been prepared by reacting an initiator having a functionality of about 2 to about 8 with an alkylene oxide component consisting essentially of from about 100 to about 80 wt. % of propylene oxide and, correspondingly, from about 20 to about 0 wt. % of ethylene oxide, and
- (b) from about 0.5 to about 5 wt. % of said polyoxypropylene polyether polyol is replaced with a chain extender having the formula:
- ##STR12## wherein R represents hydrogen or a methyl or an ethyl group, x is a number having an average value between about 1 and 4 and n represents a number having an average value between about 1 and about 40.
Dependencies are inferred from the claim text.