Compounded rubber having improved thermal transfer
AssigneeCabot Corporation
InventorsOliver W. Tassinari, Greggory C. Smith, Federico Villalpando-Paez, Alyson M. Christopher, Ping Zhang
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Abstract
A compounded elastomer comprising an elastomeric resin, a first carbon black, and a second carbon black different from the first carbon black. The second carbon black is a partially crystallized carbon black having an OAN structure of greater than 120 cm3/100 g and less than 200 cm3/100 g, a surface energy of less than 10 mJ/m2 and a Raman microcrystalline planar size (La) of greater than or equal to 25 Å and less than or equal to 50 Å.
Claims25
A compounded elastomeric composition comprising:
- an elastomeric resin;
- a first carbon black;
- a second carbon black different from the first carbon black, wherein the second carbon black is a partially crystallized carbon black having an OAN structure of greater than 120 cm3/100 g and less than 200 cm3/100 g, a surface energy of less than 10 mJ/m2 and a Raman microcrystalline planar size (La) of greater than or equal to 25 Å and less than or equal to 50 Å.
A compounded butyl elastomer composition comprising a butyl elastomer, a first carbon black, and a second carbon black different from the first carbon black, wherein the second carbon black is a partially crystallized carbon black having a Raman microcrystalline planar size (La) of greater than or equal to 22 Å, wherein the compounded butyl elastomer composition exhibits a thermal conductivity of greater than 0.25 W/mK and an ((elongation at break)×(tensile strength))/100% of greater than 80, wherein elongation at break and tensile strength are measured at 25° C.
A compounded butyl elastomer composition comprising:
- a butyl elastomer and at least 40 phr carbon black having a Raman microcrystalline planar size (La) of greater than or equal to 22 Å and less than 45 Å, an OAN structure of greater than 120 and less than 200 cm3/100 g, and a surface energy of less than 10 mJ/m2, and wherein the compounded butyl elastomer composition has a thermal conductivity of greater than 0.29 W/mK and a tensile strength at 25° C. of greater than 14.0.
A compounded elastomeric composition comprising:
- an elastomeric resin;
- and
- a carbon black exhibiting a surface energy of less than 10 mJ/m,2 a Raman microcrystalline planar size (La) of between 23 Å and 45 Å and an OAN of greater than 85 cm3/100 g and less than 200 cm3/100 g.
A compounded butyl elastomer composition comprising a butyl elastomer and at least 40 phr carbon black, wherein a portion of the carbon black is produced by thermal treatment of a base furnace black at a temperature of less than 1800° C. for a period of time adequate to increase the Raman microcrystalline planar size (La) of the base furnace black by greater than 5 Å, wherein the (thermal conductivity in W/mK)×(elongation at break %)×(tensile strength in MPa) of the compounded butyl elastomer composition is greater than 2200, wherein elongation at break and tensile strength are measured at 25° C.
Dependencies are inferred from the claim text.