Silane functionalized poly (farnesene) and rubber compound comprising the same
First Claim
1. A curable rubber composition comprising:
- a high molecular weight diene elastomer having a number average molecular weight Mn above 80,000 Da;
a silica;
a carbon black; and
a farnesene polymer produced via living anionic polymerization of at least one farnesene monomer, the farnesene polymer having at least one terminal end modified with at least one silane group, wherein the farnesene polymer has a number average molecular weight of 1,000 g/mol to 100,000 g/mol, a silane functionality of two or less and a glass transition temperature of equal to or less than −
40°
C., wherein the farnesene polymer is produced by process i) or process ii);
i) a process comprising polymerizing farnesene monomers to obtain a living farnesene polymer having one or more living ends and capping the living ends of the living farnesene polymer with a silane ester;
ii) a process comprising polymerizing farnesene monomers to obtain a living farnesene polymer, modifying at least one terminal end of the living farnesene polymer by reacting the living farnesene polymer with an alkylene oxide followed by a proton source to produce a hydroxyl-terminated farnesene polymer having at least one terminal hydroxyl group, and modifying at least one terminal hydroxyl group of the hydroxyl-terminated farnesene polymer by converting the at least one terminal hydroxyl group to a silane group.
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Accused Products
Abstract
According to an aspect of the invention, a curable rubber composition is provided which includes a high molecular weight diene elastomer; optionally, a carbon black composition; a silica composition; and a farnesene polymer comprising farnesene monomers. The farnesene polymer is modified with at least one silane group, has a number average molecular weight of 1,000 g/mol to 100,000 g/mol, and has a glass transition temperature of equal to or less than −50° C. According to another aspect of the invention, a method for producing a rubber composition for use in a tire is provided. The method includes forming a composition by mixing a farnesene polymer modified with at least one silane group, a silica composition, a high molecular weight diene elastomer, and optionally a carbon black composition, the farnesene polymer comprising farnesene monomers; and curing the composition.
9 Citations
18 Claims
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1. A curable rubber composition comprising:
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a high molecular weight diene elastomer having a number average molecular weight Mn above 80,000 Da; a silica; a carbon black; and a farnesene polymer produced via living anionic polymerization of at least one farnesene monomer, the farnesene polymer having at least one terminal end modified with at least one silane group, wherein the farnesene polymer has a number average molecular weight of 1,000 g/mol to 100,000 g/mol, a silane functionality of two or less and a glass transition temperature of equal to or less than −
40°
C., wherein the farnesene polymer is produced by process i) or process ii);i) a process comprising polymerizing farnesene monomers to obtain a living farnesene polymer having one or more living ends and capping the living ends of the living farnesene polymer with a silane ester; ii) a process comprising polymerizing farnesene monomers to obtain a living farnesene polymer, modifying at least one terminal end of the living farnesene polymer by reacting the living farnesene polymer with an alkylene oxide followed by a proton source to produce a hydroxyl-terminated farnesene polymer having at least one terminal hydroxyl group, and modifying at least one terminal hydroxyl group of the hydroxyl-terminated farnesene polymer by converting the at least one terminal hydroxyl group to a silane group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A curable rubber composition comprising:
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a high molecular weight diene elastomer having a number average molecular weight Mn above 80,000 Da; a silica; a carbon black; and a farnesene polymer produced via living anionic polymerization of at least one farnesene monomer, wherein the farnesene polymer consists of farnesene monomers and has at least one terminal end modified with at least one silane group, a number average molecular weight of 1,000 g/mol to 100,000 g/mol, a silane functionality of two or less and a glass transition temperature of equal to or less than −
40°
C.
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Specification