Patent · US Expired

Aqueous dispersions of plastics in which the average diameter of the dispersion particles is in the range from about 50 to 500 nm, and a process for their preparation

US4327004A · kind A · utility

6Cited by

7References

14Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Adolf Schmidt · Adelsheim, DE
August Bockmann · Krefeld, DE

Key dates

Filing date	Jul 30, 1980
Grant date	Apr 27, 1982
Priority date	—
Expiry date	Jul 30, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2/26
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An aqueous dispersion of a synthetic polymer of average diameter in the range of 50 to 500 nm and especially above 75 nm is disclosed, the aqueous dispersion having a solids content of 5 to 50 parts by weight per 100 parts per weight of total dispersion. The aqueous dispersion is provided by effecting polymerization in the presence of an emulsifier which comprises an alkali metal salt of a polysulfonic acid of an alkane of medium chain length e.g. 8 to 22 carbon atoms.

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