Polyols, Poly (oxyethylene oxipropilen / random) useful for preparing High Resilience flexible foams with lower tendency to Shrink; Polyurethane foams prepared with them; andCLA of Polyols and Process for Preparation of Foam Preparation

摘要

You can prepare High Resilience Polyurethane foams that Exhibit little or no shrinkage from bajainsaturaciu00f3n catalyzed polyoxyalkylene Polyols of Doubly met with cyanideu00e1lico in quantities greater than 20 porcient or Weight with respect to the total polyol component.When using Polyols Random Poly (oxyethylene oxipropilen / Low unsaturation) with less than a 35 percent weight in the form of unbloque only depolioxipropileno catalyzedBy Double metal cyanide Catalysts and one or several blocks of polyoxypropylene / polioxietilenoaleatorios externalEach of which contains a 2 percent or more by weight of portions of a oxietilenoy insaturaciu00f3 n less than 0.02 mEq / G.A mix of aredescribed Polyols suitable for Preparation of Polyurethane Foam for the preparation of Polyurethane Foam for one or several of the depoli PolyolsIn a oxialquileno between C and 20% or more by weight based on the weight of the mixture of polyols, and up to 80% by weight of at least one polyol with High Content of primary hydroxyl groups.It also relates to a process for Preparation of urethane foams depoli High Strength and expansion in water with little or no shrinkage.