TITLE: RUBBER MODIFIED METHYL METHACRYLATE SYRUPS, PRODUCTION AND USE IN
PRODUCING CAST SHEETS AND MOULDING MATERIALS
European Patent Application EP0019372 A3

ABSTRACT:
Abstract not available for EP0019372
Abstract of corresponding document: US4287317
A continuous process for producing rubber-modified methyl methacrylate
syrups which comprises continuously supplying a material liquor
comprising 1 to 20 parts by weight of a rubbery polymer dissolved in
100 parts by weight of a monomer comprising 60 to 100% by weight of
methyl methacrylate, and a radical-polymerization initiator to the
first reaction zone, continuously polymerizing at such a stationary
conversion that the rubber polymer is dispersed in the form of
particles form while maintaining the temperature and residence time in
the zone so that a steady state is achieved in the zone and the
steady-state concentration of the initiator in the zone is 1/2 to
1/1,000 time as much as the concentration of initiator supplied,
continuously taking out the resulting reaction mixture from the zone,
and passing it through the second reaction zone having a volume of 0 to
5 times as much as that of the first reaction zone, to obtain a stable
syrup comprising a disperse phase and a continuous phase, the former
phase being substantially a solution of the rubbery polymer in the
monomer and the latter one being substantially a solution of the
resinous polymer in the monomer, and a process for the production of
methyl methacrylate cast sheets and molding materials having an
excellent impact resistance from the syrups.

INVENTORS:
Kitagawa, Yoshihiko
Hanamura, Yoshimi
Yuyama, Masahiro
Moritani, Masahiko
Sakuramoto, Akira
Suzuki, Mikio

APPLICATION NUMBER: EP19800301309
PUBLICATION DATE: 02/11/1981
FILING DATE: 04/23/1980

ASSIGNEE: SUMITOMO CHEMICAL COMPANY LIMITED
INTERNATIONAL CLASSES: C08F291/00; C08F2/00; C08F2/02; C08F291/02; (IPC1-7): C08F291/02;
C08F2/02
EUROPEAN CLASSES: C08F291/02+220/14