Patent · US Expired

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

US4189559A · kind A · utility

3Cited by

2References

3Claims

0Family size

Assignee

BASF SE

Inventors

Uwe Bueltjer · Ludwigshafen, DE
Dietmar Jung · Ludwigshafen, DE
Hans-Uwe Schenck · Monsheim, DE
Herbert Spoor · Schifferstadt, DE

Key dates

Filing date	Jul 20, 1977
Grant date	Feb 19, 1980
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 reacting an oily or resinous polymer of an olefin and/or diolefin, said polymer containing hydrogen atoms in the allyl position, with 2 to 30% by weight, based on the oil and/or resin, of maleic anhydride.

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