METHOD FOR PRODUCING METHACRYLIC POLYMER

WIPO Patent Application WO/2011/142384

A1

Disclosed is a method for producing a methacrylic polymer that satisfies the formula. The method comprises a step (a) for obtaining a first syrup by supplying methyl methacrylate and, if desired, another monomer containing an alkyl (meth)acrylate to a complete mixing reactor (A) (11) and carrying out polymerization using a first radical polymerization initiator, a step (b) for obtaining a second syrup by supplying the first syrup and a second radical polymerization initiator to reactors (B) (12, 13) disposed downstream of the reactor (A) and carrying out polymerization, and a volatilizing/removing step (c) for the second syrup. 8.5x + 123 ≥ y ≥ -2.6 + 45 [y is the mass ratio (ppm) of the amount of the second radical polymerization initiators supplied to the amount of the first radical syrup supplied per unit time to the reactor (B), and x is the alkyl (meth)acrylate content (% by mass) in the monomer.]

HAYASHIDA MASAHIRO (JP)
YOSHIMURA HISAAKI (JP)
NONAKA DAISUKE (JP)
MORITA YUUSUKE (JP)
MATSUO MITSUHIRO (JP)

PCT/JP2011/060842

November 17, 2011

May 11, 2011

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MITSUBISHI RAYON CO (JP)
HAYASHIDA MASAHIRO (JP)
YOSHIMURA HISAAKI (JP)
NONAKA DAISUKE (JP)
MORITA YUUSUKE (JP)
MATSUO MITSUHIRO (JP)

C08F2/00; C08F10/00

JP2003002912A	2003-01-08
JP2000026507A	2000-01-25

MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)

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