METHOD FOR PRODUCING SILICONE STEP-GROWTH ELASTOMERS FROM DUAL FUNCTIONAL SILOXANES

摘要

A convenient, practical method for forming elastomers from dual functional siloxanes that cure by a step-growth mechanism is provided. The method involves preparing a first mixture containing a first telechelic siloxane and a hydrosilylation catalyst; preparing a second mixture containing a second telechelic siloxane and a dual functional siloxane having two different polymer termini; and reacting the first mixture with the second mixture to produce the siloxane elastomer. The first and second mixtures may be stored separately until time of use.

主权项

1. A method for producing a silicone elastomer comprising:
(a) preparing a first mixture comprising a first telechelic siloxane and a hydrosilylation catalyst; (b) preparing a second mixture comprising a second telechelic siloxane and a dual functional siloxane having two different polymer termini; and (c) reacting the first mixture with the second mixture to produce the siloxane elastomer.