Patent · US Expired

Process for the production of spherical polymers

US6025443A · kind A · utility

0Cited by

2References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Wolfgang Podszun · Neunburg vorm Wald, DE
Joachim Krüger · Mülheim an der Ruhr, DE
Olaf Halle
Frank Louwet · Diepenbeek, BE

Key dates

Filing date	Aug 13, 1998
Grant date	Feb 15, 2000
Priority date	—
Expiry date	Aug 13, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F291/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Bead polymers having an average particle size of 1 to 30 .mu.m and a narrow particle size distribution are obtained by the seed/feed process if a crosslinked polymer having a soluble fraction of less than 25 wt. % and an average particle size of 0.5 to 10 .mu.m is used as the seed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.