Process for preparing acrylic polymers using a dual peroxide...

Details Process for preparing acrylic polymers using a dual peroxide... Process for preparing acrylic polymers using a dual peroxide...

C - Chemistry, Metallurgy

08

F

402/510

C08F 265/06 (2006.01) C08F 4/32 (2006.01) C08F 20/14 (2006.01)

Patent

CA 1246794

TITLE Process for Preparing Acrylic Polymers Using a Dual Peroxide Initiator System ABSTRACT OF THE DISCLOSURE a process for producing acrylic polymers which have high thermal stability are free of defects and have a low level of unreacted monomer. The process includes the polymerization at a high production rate of a methyl methacrylate syrup in the presence of a mixture of two peroxide initiators. The first initiator has a 5-minute half-life at temperatures between about 75°C to 100°C and emits a maximum of 1 mole of carbon dioxide per 2 moles of free radicals. The second initiator has a one minutes half-life at temperature of between about 105°C to about 125°C and emits a maximum of 1 mole of carbon dioxide per 1 mole of free radicals.

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