Patent ID: 6235799
Filing Date: 2001-05-22
Classification: C08J

Abstract:
A process for preparing flexible to semi-rigid polyurethane molded articles with a compacted edge zone and a flexible cellular core, comprising reactinga) one or more organic and/or modified organic polyisocyanates and/or polyisocyanate pre-polymers withb) at least one polyol component with an OH-value of 20 to 200 and a functionality of 2 to 6,c) optionally, a polyol component with an OH-value of 201 to 899 and a functionality of 2 to 3d) at least one chain-lengthening component with an OH- or amine-value of 600 to 1850 and a functionality of 2 to 4 ande) optional additives, activators and/or stabilizers in the presence of water and in the presence of C.sub.6 hydrocarbon mixtures comprising 2-methylpentane, 3-methylpentane, 2,3-dimethylbutane and optionally 2,2-dimethylbutane, wherein said C.sub.6 hydrocarbon mixtures have a boiling point in the range of 55 to 65.degree. C.