Process and catalyst system for polydiene production
AssigneeBridgestone Corporation
InventorSteven Luo
Life of this patent
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Abstract
A process for preparing a polydiene, the process comprising the step of polymerizing conjugated diene monomer with a lanthanide-based catalyst system in the presence of a vinylsilane, an allylsilane, or an allylvinylsilane.
Claims26
A process for preparing a polydiene, the process comprising the step of:
- polymerizing conjugated diene monomer with a lanthanide-based catalyst system in the presence of a silane compound defined by the formula
- Siωxθ4−x
- where each ω is independently a vinyl group, a substituted vinyl group, an allyl group, or a substituted allyl group, each θ is independently a hydrogen atom or a monovalent organic, or two or more θ groups may join to form a polyvalent organic group, and x is an integer from 1 to 4, where ω and θ do not include a halogen atom.
A process for preparing a polydiene, the process comprising the step of polymerizing conjugated diene monomer with a lanthanide-based catalyst system in the presence of a a vinylsilane selected from the group consisting of vinyldimethylsilane, vinyltrimethylsilane, vinyltriethylsilane, vinyltriphenylsilane, vinyl-t-butyldimethylsilane, vinyl-di-n-octylmethylsilane, vinylphenylmethylsilane, vinylphenyldimethylsilane, divinyldimethylsilane, trivinylsilane, trivinylmethylsilane, tetravinylsilane, tris(vinyldimethylsiloxy)methylsilane, tris(vinyldimethylsiloxy)phenylsilane, vinyldimethylmethoxysilane, vinylphenylmethylmethoxysilane, vinyldimethylethoxysilane, vinyldiphenylethoxysilane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, vinylphenyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriisopropoxysilane, vinyltri-t-butoxysilane, vinyltriisopropenoxysilane, vinyltriphenoxysilane, vinyltris(2-methoxyethoxy) silane, vinyltris(methoxypropoxy)silane, trivinylmethoxysilane, trivinylethoxysilane, vinylsilatrane, vinylmethylbis(trimethylsiloxy)silane, vinyltris(dimethylsiloxy)silane, vinyltris(trimethylsiloxy)silane, tetrakis(vinyldimethylsiloxy)silane, vinylmethyldiacetoxysilane, vinyltriacetoxysilane, vinylmethylbis(dimethylamino)silane, 2-propenyltrimethylsilane, (1-methoxyvinyl)trimethylsilane, vinylmethylsilacyclopentane, vinyltetramethyldisiloxane, vinylpentamethyldisiloxane, 1,3-divinyltetramethyldisiloxane, 1,3-divinyl-1,3-diphenyl-1,3-dimethyldisiloxane, 1,3-divinyltetraphenyldisiloxane, 1,1,3,3-tetravinyldimethyldisiloxane, 1,3-divinyltetrae thoxydisiloxane, 1,3-divinyltetrakis (trimethylsiloxy) disiloxane, 1,2-divinyltetramethyldisilane, 1,4-divinyltetramethyldisilylethane, 1,4-bis(vinyldimethylsilyl)benzene, tris(vinyldimethylsilyl)borate, 1,5-divinylhexamethyltrisiloxane, 1,5-divinyl-3-phenylpentamethyltrisiloxane, 1,5-divinyl-3,3-diphenyl-1,1,5,5-tetramethyltrisiloxane, 1,3,5-trivinyl-1,1,3,5,5-pentamethyltrisiloxane, 1,3,5-trivinyl-1,3,5-trimethylcyclotrisiloxane, 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane, and octavinyl-T8-silsesquioxane.
A process for preparing a polydiene, the process comprising the step of:
- polymerizing conjugated diene monomer with a lanthanide-based catalyst system in the presence of a silane compound defined by the formula
- Siωxθ4−x
- where each ω is independently a vinyl group, a substituted vinyl group, an allyl group, or a substituted allyl group, each θ is independently a hydrogen atom or a monovalent organic, or two or more θ groups may join to form a polyvalent organic group, and x is an integer from 1 to 4, where the lanthanide-based catalyst system is a combination of or reaction product of (a) a lanthanide compound, (b) an alkylating agent, and (c) a halogen source, where ω and θ do not include a halogen atom.
Dependencies are inferred from the claim text.