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US 12,583,976 B2Granted
Rapid recovery silicone gels
AssigneeCommScope Technologies LLC
InventorsGary William Adams, Matthew Peter Galla
Life of this patent
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Abstract
Sealants are provided, including silicone gels, compositions, and methods of making, for use in sealing telecommunications closures. The silicone gels are capable of sealing and resealing rapidly, for example, within 5 minutes after closing.
Claims17
A method of making a silicone gel comprising:
- providing a first set of components comprising:
- (1) a base polymer having a vinyl-silicone group, (2) an addition cure catalyst, and optionally (3) a non-reactive silicone oil;
- providing a second set of components comprising:
- (1) a crosslinker having three or four Si-H hydride moieties, (2) additional base polymer having a vinyl-silicone group, and optionally (3) a non-reactive silicone oil, wherein the second set of components further comprises a chain extender having two Si-H hydride moieties per molecule, wherein the mole fraction hydride present as crosslinker (MFHC) is from about 0.2 to about 0.5, and wherein the first and/or second set of components comprises the non-reactive silicone oil;
- mixing the first and second set of components together to form a silicone gel composition;
- and
- molding and curing the silicone gel composition to form the silicone gel.
4 more elements
A silicone gel prepared from a silicone gel composition comprising:
- a base polymer having a vinyl-silicone group;
- a catalyst;
- a crosslinker having three or four Si-H hydride moieties;
- a chain extender having two Si-H hydride moieties;
- and a non-reactive silicone oil, wherein the mole fraction hydride present as crosslinker (MFHC) is from about 0.2 to about 0.5.
2 more elements
A sealant for use in an enclosure to seal cable entry/exit locations, the sealant comprising:
- a sealant material having:
- a residual indentation hardness ranging from 20 g-150 g;
- a compression set of less than 10% after 30 minutes of recovery time as measured under ASTM D395, Method B;
- an elongation to failure of at least 500% as measured under ASTM D638;
- and
- a resistance to extrusion having a measured volume of no more than 0.5 cm3.
3 more elements
Dependencies are inferred from the claim text.