Process for the production of polyurethane urea elastomers
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP0153606A2
公开(公告)日:1985-09-04
This invention pertains to the manufacture of polyurethane-urea elastomers formed by reacting a prepolymer of an organic polyisocyanate and a compound having at least two Zerewitenoff active hydrogen atoms with a chain extender comprising t-butylbenzenediamine. The utilization of t-butylbenzenediamine as an aromatic diamine chain extender imparts flexibility in the handling of reactable compositions due to an increase in pot life and imparts excellent tensile modulus to the resulting polymer.