Alkyl substituted piperazines and use as chain extenders in polyurea elastomer systems
申请人:TEXACO CHEMICAL COMPANY
公开号:EP0459692A2
公开(公告)日:1991-12-04
A useful group of chain extenders for the production of polyurea elastomers by reacting polyisocyanates with amine-terminated polyols are alkyl-substituted piperazines. The preferred piperazines, some of which are novel, are compounds of the formula
wherein R is C₁-C₁₀ alkyl and R′ and R˝ are each alkyl radical or inertly-substituted alkyl.
These alkyl-substituted piperazines can be obtained by reacting a 2-amino-2-alkyl-1-alkanol alkylene oxide adduct with ammonia.