Process for the manufacture of polyurethane foam
AssigneeBASF SE
InventorsHeinrich Horacek, Manfred Barl, Rolf Wurmb, Matthias Marx
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Abstract
A process for making a polyurethane which comprises reacting an organic polyisocyanate with a higher molecular weight organic polyhydroxyl compound in the presence of a catalyst having the following formula: ##STR1## wherein X is sulfur or NH and n is a whole number from 2 to 6. Also used is a catalyst which is a combination of the above-mentioned catalyst and an organic tin compound.
Claims8
A process for the manufacture of a polyurethane which comprises reacting an organic polyisocyanate with a higher molecular weight organic polyhydroxyl compound in the presence of one or more of a catalyst having the following formula:
- ##STR4## wherein X is sulfur or imino (NH) and n is a whole number from 2 to 6.
In a process of making a polyurethane foam by reacting an organic polyisocyanate with a higher molecular weight polyhydroxyl compound in the presence of a catalyst, a blowing agent, a chain extender, an auxiliary and an additive, the improvement which comprises catalyzing the reaction with a material having the formula:
- ##STR5## wherein X is sulfur or imino (NH) and n is a whole number from 2 to 6.
Dependencies are inferred from the claim text.