Patent · US Expired

Continuous polymerization of chloroprene

US4521576A · kind A · utility

3Cited by

7References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Rudiger Musch · Bensberg, DE
Wilhelm Gobel · Leverkusen, DE
Wolfgang Konter · Neuss, DE
Wilfried Nolte · Leverkusen, DE

Key dates

Filing date	Nov 30, 1983
Grant date	Jun 4, 1985
Priority date	—
Expiry date	Nov 30, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F36/18
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the production of storable polychloroprene having reduced tackiness on mixing rolls by the continuous polymerization of chloroprene and, optionally, up to 50%, by weight, of a monomer copolymerizable with chloroprene in aqueous alkaline emulsion in the presence of emulsifiers and radical initiators at temperatures of from 0.degree. to 70.degree. C., followed by isolation, characterized in that from 90 to 150 parts, by weight, of water, from 2.5 to 4.0 parts, by weight of a potassium salt of disproportionated abietic acid (based on acid), from 0.3 to 1.0 parts, by weight, of a condensation product of naphthalene sulphonic acid and formaldehyde and from 0.2 to 1.5 parts, by weight, of potassium hydroxide, all the quantities being based on 100 parts, by weight, of monomer, are used for the polymerization reaction.

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