| 摘要 |
1316211 Polymerization catalyst INTERNATIONAL LEAD ZINC RESEARCH ORGANIZATION Inc 1 July 1971 [2 July 1970] 30889/71 Heading B1E [Also in Divisions C2 and C3] A catalyst system comprises a complex formed by reacting (a) a diorgano zinc compound R Zn R' wherein: R is C 1-6 alkyl or C 6-8 aryl (either of which may be substituted); and R' is the same as R, alkoxy, aryloxy or diarylamino; with (b) a triorgano metal thiolate R 3 M-S-CH 2 -C(R"R"') OH wherein: R is as above; R", R"' are H, CH 3 , CH 2 OH, CH 2 Cl; phenyl (which may be substituted) or (CH 2 ) n CH 3 where n is 1 to 16; and M is Si, Ge, Sn or Pb. The two components are reacted in a non-polar solvent at 0‹C to 120‹C under an inert dry atomsphere in quantities to supply a Zn/OH ratio of 1:1 to 1:2. The thiolate compound may be prepared in situ from a triorgano metal hydroxide and a mercapto compound. Catalyst systems described in the Examples are: (i) diethyl or dibutyl zinc, ethyl zinc ethanolate, ethyl zinc phenolate, ethyl zinc diphenylamine or tris (ethyl zinc) glycerolate together with [(2-hydroxyethyl)thio] triphenyl lead; (ii) diphenyl zinc with [(2-dihydroxypropyl)thio] triphenyl lead; (iii) diethyl zinc with [(2-hydroxypropyl)thio] triphenyl lead; (iv) diethyl zinc with [(2-hydroxyethyl)thio] triphenyl lead, [(2- hydroxypropyl)thio] triphenyl lead or [(3- phenoxy-2-hydroxypropyl)thio] triphenyl lead formed in situ by reaction of triphenyl lead hydroxide with the corresponding thiols; (v) diethyl zinc with [(2-hydroxyethyl)thio] tri-ptolyl lead; and (vi) diphenyl zinc with [(2- hydroxy ethyl)thio] triphenyl tin. |
