Patent · US Expired

Process for preparing a dispersion and for preparing polymer particles

US5677373A · kind A · utility

27Cited by

5References

10Claims

0Family size

Assignee

Sinvent AS · NO

Inventors

Arvid Berge · Trondheim, NO
Tom-Nils Nilsen · Trondheim, NO
Jon-Olav Bj.o slashed.rgum
John Ugelstad · Trondheim, NO

Key dates

Filing date	Apr 22, 1994
Grant date	Oct 14, 1997
Priority date	—
Expiry date	Apr 22, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G12/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for producing a dispersion, wherein dispersed slightly crosslinked polyvinyl seed particles are swollen with an ionizing liquid, said seed particles containing covalently linked ionizable groups causing a swelling of the seed particles by the ionizing liquid to form a dispersion of droplets, wherein the resulting droplets after the swelling have a volume which is at least five times that of the seed particles. Said ionizing liquid may be or contain a polymerizable monomer or be charged with such a monomer. Polymerization of the monomers is effected in the droplets during or after the swelling, to form polymer particles.

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