Polyurethane-urea elastomer suitable for dynamic application

Application Number: 00103721
Application Date: 2000.03.02
Publication Number: 1265401
Publication Date: 2000.09.06
Priority Information: 1999/3/2 US 09/260293
International: B29C39/24;C08G18/16;C08J9/00
Applicant(s) Name: Air Products and Chemicals Inc.
Inventor(s) Name: M. J. Kulp;E. L. McEnnis
Patent Agency Code: 72001
Patent Agent: liu yuanjin
Abstract A method for the rotational casting of a polyurethane elastomer onto a rotating substrate which comprises mixing a polyurethane prepolymer, an amine curative and optionally a polyol in a mixing head and depositing the mixture onto the rotating substrate, the amine curative comprising: (a) 2-45 % by weight of aminobenzoate polyol having molecular weight of 200-3,000, (b) 55-98 % by weight of aromatic polyamine, and (c) 0 to <5 parts by weight of carboxylic acid catalyst per hundred parts (a) and (b), the amine curative being at a temperature sufficient to melt the amines when mixed with the polyurethane prepolymer.