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BASF Corp
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BASF Corp
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Publication of CA2193252A1publicationCriticalpatent/CA2193252A1/en
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Publication of CA2193252CpublicationCriticalpatent/CA2193252C/en
There is provided a method of making the polyoxyalkylene polyether polyol by reacting in the presence of a catalyst an initiator compound having at least two sites reactive with an alkylene oxide, directly or indirectly in sequential order, propylene oxide to form an internal block of oxypropylene groups, followed by reacting directly or indirectly onto the block of oxypropylene groups one or more second oxide compounds, at least one of which is a C4 or higher alkylene oxide, to form a second block of oxyalkylene groups. The amount of propylene oxide added is advantageously from 25 weight percent to 80 weight percent, based on the weight of all oxyalkylene compounds added to the initiator and the initiator, and the amount of the one or more second oxide compounds, at least one of which is a C4 or higher alkylene oxide, should be effective to reduce the unsaturation of the polyether polyol to 0.06 meq KOH/g of polyol or less.
CA 21932521995-12-291996-12-17Methods of making low unsaturation polyether polyols
Expired - Fee RelatedCA2193252C
(en)
Molded and slab polyurethane foam prepared from double metal cyanide complex-catalyzed polyoxyalkylene polyols and polyols suitable for the preparation thereof
Poly(oxypropylene/oxyethylene) random polyols useful in preparing flexible high resilience foam with reduced tendencies toward shrinkage and foam prepared therewith
Molded and slab polyurethane foam prepared from double metal cyanide complex-catalyzed polyoxyalkylene polyols and polyols suitable for the preparation thereof
Preparation of flexible polyurethane foams having low compressive strength and block polyoxypropylene polyoxyethylene polyol mixtures which can be used for this purpose
A flexible polyurethane foam prepared by co-comminuting an aqueous solution of a solid polyhydroxyl initiator was prepared by mixing a polyether polyol