Process for controlling the particle size of expandable...

Details Process for controlling the particle size of expandable... Process for controlling the particle size of expandable...

C - Chemistry, Metallurgy

08

F

C08F 212/08 (2006.01) C08F 12/08 (2006.01) C08J 9/16 (2006.01) C08J 9/20 (2006.01)

Patent

CA 2051324

O.Z. 4521 Abstract: Process for controlling the particle size of expandable styrene polymers by suspension polymerisation A process for controlling the particle size of polymers based on styrene and optionally copolymerisable monomers by suspension polymerisation is described. At least 70%, based on the total amount of monomers used, of the monomers are initially polymerised in aqueous suspension in the presence of a dispersant, an initiator and other additives to a conversion of at least 70% by weight, and the residual amount of monomer is then metered in within 1 to 3 hours. The polymers thus prepared exhibit the desired increase in particle size and have low internal water contents. They are preferably used as insulating material.

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