Process for preparing beads of polymers having an acrylic basis

Details Process for preparing beads of polymers having an acrylic basis Process for preparing beads of polymers having an acrylic basis

C - Chemistry, Metallurgy

08

F

C08F 220/12 (2006.01) C08F 2/18 (2006.01) C08F 2/20 (2006.01) C08F 220/10 (2006.01) C08F 265/04 (2006.01)

Patent

CA 2197843

Process for preparing beads based on acrylic polymers which comprises the preparation of microbeads from 10 to 40 micron by means of a polymerization process in suspension of acrylic monomers in the presence of at least a crosslinking monomer at least bifunctional, characterized in that a second polymerization of the acrylic monomers is carried out in absence of crosslinking monomers and using as suspending phase a fraction of the suspension obtained in the preceding polymerization containing a crosslinking agent, said fraction containing an amount of microbeads comprised between 3 and 40% by weight with respect to the final polymer obtained in the second polymerization.

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