CPC C08L 83/04 (2013.01) [C08G 77/12 (2013.01); C08G 77/20 (2013.01)] | 23 Claims |
[ 24. A method of making a silicone gel comprising:
providing a first set of components comprising: (1) a base polymer having a vinyl-silicone group, and (2) an addition cure catalyst;
providing a second set of components comprising: (1) a crosslinker having three or four Si-H groups, (2) a chain extender having two Si-H groups, and (3) additional base polymer having a vinyl-silicone group; and
mixing the first and second set of components together to form the silicone gel, wherein the silicone gel has a hardness between 100 g and 300 g, and a mole fraction of hydride present as crosslinker between 0.2 and 0.5, wherein the base polymer and additional base polymer are each a vinyl-terminated polydimethylsiloxane each having a molecular weight between 28,000 g/mol and 70,000 g/mol, and wherein the silicone gel exhibits less than 10% oil bleed out after being under compression of 1.2 atm for 200 hours at 60° C. ]
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