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US 5,478,866 AGranted
Flexible polyurethane foam and process for preparing same
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsMasashi Obata, Seijiro Sakai, Kaoru Ueno
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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsMasashi Obata, Seijiro Sakai, Kaoru Ueno
Estimating the term…
A flexible polyurethane foam which has a low density, enhanced impact resilience, improved compression set and excellent effect on the reduction of 6 Hz vibration transmissibility and is obtained by a reaction of an organic polyisocyanate composition, that is, a mixture of (a) polymethylenepolyphenyl isocyanate containing from more than 60 to 90% by weight of a two benzene ring compound and having a weight ratio [three benzene ring compound]/[four or more benzene ring compounds + less active ingredient] of 1.1-20.0, and (b) tolylene diisocyanate in a ratio (a)/(b) of 97.apprxeq.80/3.apprxeq.20 by weight, or by reaction of a prepolymer derived from said organic polyisocyanate composition and a specific polyol, with a resin premix comprising a water blowing agent and an active hydrogen containing compound; and a process for preparing the flexible polyurethane foam.
A flexible polyurethane foam obtained by the reaction of an organic polyisocyanate composition with a mixture of an active hydrogen containing compound, blowing agent, catalyst, surfactant and other auxiliary agent comprising using water as a blowing agent and using a mixture of:
A process for preparing a flexible polyurethane foam by reacting an organic polyisocyanate composition with a mixture of an active hydrogen containing compound, blowing agent, catalyst, surfactant and other auxiliary agent, comprising using water as a blowing agent and using a mixture of:
Dependencies are inferred from the claim text.