- PROCESS FOR PREPARING RESIN-LINEAR ORGANOSILOXANE BLOCK COPOLYMERS

摘要

In a first step, a process for preparing a resin-linear organosiloxane block copolymer by reacting a capped linear organosiloxane and an organosiloxane resin to form a resin-linear organosiloxane block copolymer is disclosed. Thereafter, in the second step, the resulting resin-linear organosiloxane block copolymer is crosslinked to increase the average molecular weight of the resin-linear organosiloxane block copolymer by at least 50%. The resin-linear organosiloxane block copolymers prepared by the disclosed process can provide optically solid compositions that can be considered " reworkable "