公开(公告)号：EP0594696B1

公开(公告)日：1997-04-16

申请号：EP92914963.1

申请日：1992-07-15

Applicant: SINVENT A/S

Inventor： BERGE, Arvid ,  NILSEN, Tom-Nils ,  BJORGUM, Jon-Olav ,  UGELSTAD, John

IPC: C08F8/00 ,  C08F291/00 ,  C08J3/03

CPC classification number: C08G65/22 ,  C01B32/05 ,  C08F8/44 ,  C08F291/00 ,  C08G8/22 ,  C08G12/12

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 5 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.