High resilience foam

Claim 1

A process for producing high resilience polyether urethane foam, said process comprising foaming and reacting a mixture comprising: a. an organic polyether polyol having an average primary hydroxyl content of at least 35 mole percent and an average hydroxyl functionality from 2.1 to about 5; b. an organic polyisocyanate, said organic polyether polyol and said polyisocyanate being present in the mixture in a major amount and in a relative amount required to produce the urethane; c. a blowing agent in a minor amount sufficient to foam the reaction mixture; d. a catalytic amount of a tertiary amine catalyst for the production of the urethane; and e. a tertiary alcohol-modified siloxane surfactant in an amount sufficient to stabilize the foam against voids and shrinkage, said siloxane consisting essentially of (1) monofunctional end-blocking siloxy units, the respective silicon atoms of which have two alkyl radicals bonded thereto, the third silicon-bonded organic group being a tertiary alcohol radical, or an alkyl radical (2) an average of from about 1 to 6 moles of dialkylsiloxy units for every two moles of said monofunctional siloxy units, and (3) from zero up to an average of about 6 moles, for every two moles of said monofunctional siloxy units, of difunctional monoalkylsiloxy units in which the second organic group bonded to silicon is a tertiary alcohol radical; provided an average of at least about 0.5 moles of said tertiary alcohol groups are present in said tertiary alcohol-modified siloxane for every two moles of said monofunctional siloxy units, and wherein the silicon bonded alkyl radicals have from 1 to 4 carbon atoms and the silicon-bonded tertiary alcohol radicals have the formula ##STR13## wherein R 1 is a bivalent hydrocarbon selected from the class consisting of alkylene radicals having from 2 to 8 carbon atoms and alkenylene radicals having from 2 to 8 carbon atoms, and R 2 is an alkyl radical having from 1 to 4 carbon atoms.