Patent · US Expired

Manufacture of polymers in bead form from water-soluble, ethylenically unsaturated monomers

US4164613A · kind A · utility

2Cited by

3References

3Claims

0Family size

Assignee

BASF SE

Inventors

Richard Hoene · Heidelberg, DE
Dietmar Jung · Ludwigshafen, DE
Hans-Uwe Schenck · Monsheim, DE
Herbert Spoor · Schifferstadt, DE

Key dates

Filing date	Jul 20, 1977
Grant date	Aug 14, 1979
Priority date	—
Expiry date	Jul 20, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2/32
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Production of polymers in bead form by forming a water-in-oil suspension of an aqueous solution containing at least one water-soluble ethylenically unsaturated monomer in an inert hydrophobic liquid organic dispersion medium and polymerizing the suspended monomer in the presence of a polymerization initiator and a protective colloid obtained by polymerizing (A) 60 to 100% by weight of at least one monomer selected from the group consisting of cyclopentadiene, dicyclopentadiene, tricyclopentadiene and alkyl-substituted derivatives thereof, and (B) 0 to 40% by weight, based on the mixture of (A) and (B), of a mono- or diethylenically unsaturated monomer copolymerizable with (A).

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