Initiating process and system for the anionic polymerization of

Details Initiating process and system for the anionic polymerization of Initiating process and system for the anionic polymerization of

1993-07-14

1997-05-13

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526265, 5263285, 526347, 5263486, 525299, 502157, C08F 456, C08F22606, C08F22010, C08F21206, C08F21000, C08F29300, B01T 3100

Patent

active

056293933

ABSTRACT:
The initiating system for the anionic polymerization of acrylic monomers, and where necessary, vinyl comonomers, including at least one R-M initiator in which M=a metal chosen from among the alkaline and alcaline earth metals and R=an alkyl with a linear or branched chain at C.sub.2 -C.sub.6 or aryl or arylalkyl, is characterized by the fact that the polymerization takes place in the presence also of at least one R.sub.1 OM.sub.1 alkaline metal alcoholate, in which R=an alkyl with a linear or branched chain at C.sub.1 -C.sub.6 or aryl or aryalkyl and M.sub.1 =an alkaline metal, on condition that when M.sub.1 is lithium, then R=an aryl or arylalkyl. Said process for the polymerization of primary, secondary, or tertiary alkyl acrylates, and possibly of vinyl comonomers, is characterized by the fact that the polymerization takes place in the presence of an initiating system as described above.

REFERENCES:
patent: 3189663 (1965-06-01), Nozaki
patent: 3285894 (1966-11-01), Lim et al.
patent: 4767824 (1988-08-01), Ouhadi et al.
patent: 5057583 (1991-10-01), Tung et al.
patent: 5391628 (1995-02-01), Gaillard et al.
Wiles, D.M. et al., "The butyllithium-initiated polymerization of methyl-methyacrylate. III. Effects of lithium alkoxides," Journal of Physical Chemistry, vol. 68, No. 7, Jul. 1964, pp. 1983-1987.
D. M. Wiles and S. Bywater, Trans. Faraday Soc. 61,150, 1965.

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