Patent ID: 6479114
Filing Date: 2002-11-12
Classification: B29C,B29K,B29L,B60R,B62D,Y10T

Abstract:
A steering wheel comprising:a pad positioned in a center of a ring for covering an air bag; and at least one spoke extending radially from said pad to said ring, wherein said pad, said ring and said at least one spoke are all integrally formed of a polyurethane in one molding step, said polyurethane is molded from a polyurethane material comprising a diphenylmethane diisocyanate prepolymer and a polyol component, said diphenylmethane diisocyanate prepolymer being denaturated by adding a glycol having an average molecular weight of 2000 or greater; wherein the amount of said glycol in the denaturated diphenylmethane diisocyanate prepolymer is from about 25 to about 42% by weight based on the weight of the denaturated prepolymer; wherein the amount of the diphenylmethane diisocynate (MDI) prepolymer is 89 to 117.7 parts by weight for 100 parts by weight of polyol component.