Patent ID: 11390747

Abstract:
A composition for forming a silicone elastomer is disclosed. The composition comprises: A) a linear organopolysiloxane having at least two silicon-bonded ethylenically unsaturated groups per molecule; B) a linear organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; C) at least one cross-linker; and D) a hydrosilylation catalyst. The cross-linker C) is selected from the group consisting of: C1) an organopolysiloxane having at least three silicon-bonded ethylenically unsaturated groups per molecule; and C2) an organopolysiloxane having at least three silicon-bonded hydrogen atoms per molecule. At least one of the silicon-bonded ethylenically unsaturated groups of component C1) has a lower reactivity relative to the silicon-bonded ethylenically unsaturated groups of component A). Moreover, at least one of the silicon-bonded hydrogen atoms of component C2) has a lower reactivity relative to the silicon-bonded hydrogen atoms of component B). Methods of forming three-dimensional (3D) articles utilizing the compositions are also disclosed.