Mono-hydroxy polybutadiene for use as internal plasticiser - in polyurethane prepn. from polybutadiene diol and poly:isocyanate preventing plasticiser migration

摘要

The mono-OH polybutadiene is liquid with mol. wt. 500-100,000 (900-20,000), esp. 5000, and partic. with viscosity 37 P. The isocyanate has is not 2 NCO gps. and may be (cyclo)aliphatic or aromatic. The diol is a liquid polybutadiene diol with mol. wt. 2000-4000. Short-chain polyols with2-3 OH gps., e.g. diethylene glycol, are also included. The reaction mixt. may contain catalysts, e.g. tert. amines or organo-Sn cpds. The prod. may be solid or a foam.