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US 10,370,475 B2Granted
Elastomeric compounds having increased cold flow resistance and methods producing the same
AssigneeBridgestone Corporation
InventorsXiao-Dong Pan, Zengquan Qin, Yuan-Yong Yan
Life of this patent
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Abstract
Elastomeric compounds having increased cold flow resistance may be obtained by utilizing from 10-100 phr of a functionalized rubbery polymer containing specified types of functionalizing units, at least 0.01 phr of a multivalent metal organic salt and 0-90 phr of at least one additional rubbery polymer.
Claims19
An elastomeric composition comprising:
- (a) from 10 to 100 phr of a rubbery polymer having at least one functionalized terminus with functionality comprising a functionalizing terminating compound comprising an aryl group having at least one aromatic ring, and the at least one aromatic ring bears at least two directly-bonded —OR groups, where R is hydrogen or a hydrolyzable protecting group, with the proviso that at least 30% of the —OR groups are hydrolyzed;
- (b) at least 0.01 phr of a multivalent metal organic salt;
- and
- (c) from 0 to 90 phr of at least one additional rubbery polymer, wherein the rubbery polymer having at least one functionalized terminus contains monomers selected from conjugated diene compounds optionally in combination with monomers selected from vinyl aromatic compounds.
1 more element
An elastomeric composition comprising:
- (a) from 10 to 100 phr of a rubbery polymer having at least one functionalized terminus with functionality comprising a functionalizing terminating compound comprising an aryl group having at least one aromatic ring, and the at least one aromatic ring bears at least two directly-bonded —OR groups, where R is hydrogen or a hydrolyzable protecting group, with the proviso that at least 30% of the —OR groups are hydrolyzed;
- (b) from 0.01 phr to 10 phr of a multivalent metal organic salt;
- (c) from 0 to 90 phr of at least one additional rubbery polymer selected from natural rubber, polybutadiene, polyisoprene, styrene-butadiene rubber, butyl rubber, neoprene, ethylene-propylene rubber, EPDM, nitrile rubber, silicone rubber, fluoroelastomers, ethylene-acrylic rubber, ethylene-vinyl acetate rubber, epichlorohydrin rubber, chlorinated polyethylene rubber, chlorosulfonated polyethylene rubber, hydrogenated nitrile rubber, or tetrafluoroethylenepropylene rubber;
- and
- (d) from 5 to 200 phr of at least one filler selected from carbon black, fumed or precipitated silica, clay, metal oxide, metal hydroxide, metal sulfide, metal silicate, or metal carbonate,
- wherein the rubbery polymer having at least one functionalized terminus contains monomers selected from conjugated diene compounds optionally in combination with monomers selected from vinyl aromatic compounds.
3 more elements
An elastomeric composition comprising:
- (a) from 10 to 100 phr of a rubbery polymer having at least one functionalized terminus with functionality comprising a functionalizing terminating compound comprising an aryl group having at least one aromatic ring, and the at least one aromatic ring bears at least two directly-bonded —OR groups, where R is hydrogen or a hydrolyzable protecting group, with the proviso that at least 30% of the —OR groups are hydrolyzed,
- (b) at least 0.01 phr of a multivalent metal organic salt;
- (c) from 0 to 90 phr of at least one additional rubbery polymer;
- and
- (d) from 5 to 200 phr of at least one filler selected from carbon black, fumed or precipitated silica, clay, metal oxide, metal hydroxide, metal sulfide, metal silicate, or metal carbonate,
- wherein the rubbery polymer having at least one functionalized terminus contains monomers selected from conjugated diene compounds optionally in combination with monomers selected from vinyl aromatic compounds.
3 more elements
Dependencies are inferred from the claim text.