An ultraviolet absorbent composition, having ultraviolet absorbent A and a silicon compound, in which the ultraviolet absorbent A has a maximum absorption wavelength from 350 nm to 400 nm, a half value width of 55 nm or less, and the molar extinction coefficient of 20000 or more at the maximum absorption wavelength.
Process For Producing Polydienes
申请人:Bridgestone Corporation
公开号:US20150031845A1
公开(公告)日:2015-01-29
A method for producing a polydiene, the method comprising the steps of (i) forming an active catalyst by combining a lanthanide-containing compound, an alkylating agent, and a halogen source in the substantial absence of an organosulfide; and (ii) polymerizing conjugated diene monomer in the presence of the active catalyst and an organosulfide.
US9650456B2
申请人:——
公开号:US9650456B2
公开(公告)日:2017-05-16
[EN] PROCESS FOR PRODUCING POLYDIENES<br/>[FR] PROCÉDÉ DE FABRICATION DE POLYDIÈNES
申请人:BRIDGESTSONE CORP
公开号:WO2013138270A1
公开(公告)日:2013-09-19
A method for producing a polydiene, the method comprising the steps of (i) forming an active catalyst by combining a lanthanide-containing compound, an alkylating agent, and a halogen source in the substantial absence of an organosulfide; and (ii) polymerizing conjugated diene monomer in the presence of the active catalyst and an organosulfide.