Reducing the monomer content in expandable thermoplastic beads

Details Reducing the monomer content in expandable thermoplastic beads Reducing the monomer content in expandable thermoplastic beads

1978-07-25

1979-04-03

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

526 80, C08J 920

Patent

active

041478452

ABSTRACT:
The invention relates to a process for reducing the monomer content in expandable thermoplastic beads which are produced by polymerizing an ethylenically unsaturated monomer or a mixture of such monomers in aqueous suspension in the presence of a blowing agent. The residual monomers in both the beads and the process water are reduced by treatment of the slurry of beads and water obtained after polymerization in a vessel at a temperature above 65.degree. C. in the presence of at least one water-soluble initiator. In order to avoid the expansion of the beads during the course of monomer reduction the vessel is kept completely filled with a liquid, preferably water, during the temperature treatment.

Affiliated with

Also associated with

Rating

Reducing the monomer content in expandable thermoplastic beads does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reducing the monomer content in expandable thermoplastic beads, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing the monomer content in expandable thermoplastic beads will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1747253