Elastomeric compound
View Patent ↗An elastomeric compound comprises 20-80 parts per hundred cross-linkable materials of liquid elastomer. The liquid elastomer has a complex dynamic viscosity less than 5 McP (5,000 N*s/m 2 ) at a temperature between 20° C. and the maximum flow temperature T F , and the elastomeric compound the elastomeric material has a complex dynamic viscosity of less than 5 McP (5,000 N*s/m 2 ) for at least 2 minutes at a maximum flow temperature T F .
1. A method for preparing a vulcanizable elastomer composition comprising the steps of: (1) mixing a cross-linkable functionalized polyethylene with at least one cross-linkable liquid elastomer to form a non-reactive extrudant, wherein the mixing occurs at a temperature in the range of 10° F. above or below the melt point of the cross-linkable functionalized polyethylene, and wherein the non-reactive extrudant contains from 20 to 80 parts per hundred of the cross-linkable liquid elastomer, (2) extruding the non-reactive extrudant, and (3) mixing the extrudent with at least one curing agent, wherein the mixing is sufficient to form the vulcanizable elastomer, and wherein the vulcanizable elastomer has a complex dynamic viscosity of less than 5 McP (5,000 N*s/m 2 ) for at least 2 minutes at a maximum flow temperature.
2. The method of claim 1 wherein the cross-linkable functionalized polyethylene is a cross-linkable oxidized polyethylene.
3. The method of claim 1 wherein the non-reactive extrudant contains from 25 to 60 parts per hundred of the cross-linkable liquid elastomer.
4. The method of claim 1 wherein the cross-linkable liquid elastomer is selected from the group consisting of polybutadiene rubber, nitrile rubber, hydrogenated nitrile rubber, styrene-butadiene rubber, neoprene rubber, butyl rubber, polyisoprene rubber, propylene rubber, carboxylated nitrile rubber, and EP(D)M rubber.
5. The method of claim 1 wherein the non-reactive extrudant contains from 30 to 55 parts per hundred of the cross-linkable liquid elastomer.
6. The method of claim 1 wherein the cross-linkable liquid elastomer is polybutadiene rubber.
7. The method of claim 1 wherein the cross-linkable liquid elastomer is styrene-butadiene rubber.
8. The method of claim 1 wherein the cross-linkable liquid elastomer is polyisoprene rubber.
9. The method of claim 1 wherein a non-reactive extrudant is further comprised of an ethylene-propylene rubber and an enthylene-propylene-diene rubber.