Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1995-06-06
1997-08-12
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526189, 5263297, C08F 452, C08F 446, C08F12014
Patent
active
056567049
ABSTRACT:
Mechanically strong; heat-resistant and transparent PMMA polymers having a high content of syndiotactic triads, a number average molecular weight ranging from 5,000 to 500,000 and a polydispersity index ranging from 1.01 to 1.5, are prepared by anionically polymerizing methyl methacrylate, characteristically at a temperature of at least 0.degree. C., in the presence of (a) at least one organolithium or organosodium initiator and (b) at least one AlR.sup.1 R.sup.2 R.sup.3 ligand, for example at least one di- or tri-phenoxy alkyl aluminum compound.
REFERENCES:
patent: 5328970 (1994-07-01), Inoue et al.
Heim Philippe
Teyssie Philippe
Vuillemin Bruno
Wang Jinshan
Cheng Wu C.
Elf Atochem S.A.
Schofer Joseph L.
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