90050-59-2Relevant articles and documents
SILANE COUPLING AGENT SYNTHESIS METHOD USING SELECTIVE SINGLE TERMINAL REACTION
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, (2020/04/24)
PROBLEM TO BE SOLVED: To provide an effective synthesis method of a silane coupling agent using a selective single terminal reaction to a both terminals equivalent compound without using expensive noble metal catalysts such as platinum and palladium in synthesis of novel silane coupling agent for adding high compatibility to a radical polymerizable monomer, and thereby adding high mechanical strength, flexibility (suppleness) and durability. SOLUTION: In a reaction for introducing a functional group only to a single terminal of a both terminals equivalent compound such as 1,10-decane diol for example, a nonuniform emulsion state is formed without adding an organic solvent for dissolving both substrates when reaction substrates are not dissolved each other and a reaction is processed at an emulsion boundary surface thereof. For generating the nonuniform emulsion state, the reaction is proceed at the emulsion boundary surface by using a microreactor element, a flow focusing device, a glass beads filling column or the like. SELECTED DRAWING: Figure 4 COPYRIGHT: (C)2020,JPOandINPIT
Catalyst system for producing polyethylene copolymers in a high temperature solution polymerization process
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Page/Page column 15; 16, (2019/06/10)
Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) wherein M is Hf X is a sigma ligand, L is a bridge of the formula —SiR82—, wherein each R8 is independently a C1-C20-hydrocarbyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl n is 0, 1 or 2 R1 and R1′ are the same or can be different and can be a linear or branched C1-C6-alkyl group, R2 and R2′ are the same or are different and are a CH2—R9 group, with R9 being H or linear or branched C1-C6-alkyl group R5 and R5′ are the same or are different and can be H or a linear or branched C1-C6-alkyl group or a OR group, wherein R is a C1-C6-alkyl group R6 and R6′ are the same or are different and can be H or a C(R10)3 group, with R10 being the same or different and R10 can be H or a linear or branched C1-C6-alkyl group or R5 and R6 and/or R5′ and R6′ taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, and R7 and R7′ can be the same or are different and can be H or a linear or branched C1-C6-alkyl group (ii) an aluminoxane cocatalyst and/or (iii) a boron containing cocatalyst and (iv) optionally an aluminum alkyl compound.
Catalyst
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Page/Page column, (2014/07/08)
A catalyst comprising (i) an asymmetric complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from -R'2C-, -R'2C-CR'2-, -R'2Si-, -R'2Si-SiR'2-, -R'2Ge-, wherein each R' is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 and R2' are each independently linear C1-10 hydrocarbyl; R5 and R5' are each independently hydrogen or a C 1-20 hydrocarbyl group; R6 and R6' are each independently hydrogen or a C1-20 hydrocarbyl group; R7 is hydrogen or a C1-20 hydrocarbyl group or is ZR3; Z is O or S, preferably O; R3 is a C1-10 hydrocarbyl group; Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8; Ar' is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8'; R8 and R8' are each independently is a C1-20 hydrocarbyl group; with the proviso that at least one of R6 or R7 is not H; and (ii) a cocatalyst comprising a compound of a group 13 metal, e.g. boron.
