Dry Silicone Gels and Their Methods of Making
First Claim
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1. A method of making a dry 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, (2) a chain extender, and (3) additional base polymer having a vinyl-silicone group; and
mixing the first and second set of components together to form the dry silicone gel.
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Abstract
Methods and systems are provided for a dry silicone gel. The dry silicone gel comprises a base polymer having a vinyl-silicone group, a crosslinker, and a chain extender. The dry silicone gel may be made by reacting (a) a first set of components comprising a base polymer having a vinyl-silicone group and an addition cure catalyst with (b) a second set of components comprising a crosslinker, a chain extender, and additional base polymer. In certain circumstances, the base polymer and additional base polymer are vinyl-terminated polydimethylsiloxane.
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Citations
26 Claims
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1. A method of making a dry silicone gel comprising:
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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, (2) a chain extender, and (3) additional base polymer having a vinyl-silicone group; andmixing the first and second set of components together to form the dry silicone gel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making a dry silicone gel comprising:
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providing a first set of components comprising; (1) a vinyl-terminated polydimethylsiloxane having a molecular weight between 28,000 g/mol and 70,000 g/mol, a viscosity between 3,000 mm2/s and 7,000 mm2/s, and a vinyl content between 0.01 mmol/g and 0.1 mmol/g, and (2) an addition cure catalyst, wherein the catalyst is selected from the group consisting of platinum complexed with divinyltetramethyldisiloxane and rhodium chloride complex; providing a second set of components comprising; (1) a crosslinker selected from the group consisting of tetrakis(dimethylsiloxy)silane, methyltris(dimethylsiloxy)silane, and combinations thereof, (2) a chain extender selected from the group consisting of hydride containing polydimethylsiloxane, dihydride containing siloxane, hydride terminated polydimethylsiloxane, hydride terminated polyphenylmethylsiloxane, hydride terminated polydiphenylsiloxane, functionalized terminated silicone, and combinations thereof, (3) an inhibitor, and (4) additional vinyl-terminated polydimethylsiloxane having a vinyl-terminated polydimethylsiloxane having a molecular weight between 28,000 g/mol and 70,000 g/mol, a viscosity between 3,000 mm2/s and 7,000 mm2/s, and a vinyl content between 0.01 mmol/g and 0.1 mmol/g; and mixing the first and second set of components together to form the dry silicone gel, wherein the dry silicone gel has a mole fraction of hydride present as crosslinker between 0.2 and 0.5, wherein the hydride to vinyl ratio in the dry silicone gel is between 0.8 and 1.0, and wherein the weight percent ratio between the first set of components and the second set of components is 1;
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17. A dry silicone gel comprising:
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a base polymer having a vinyl-silicone group; a crosslinker; and a chain extender. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification