Patent · US Expired

Free radical miniemulsion polymerization with low shear and heat exchanger

US6117939A · kind A · utility

6Cited by

3References

6Claims

0Family size

Assignee

BASF SE

Inventors

Klemens Mathauer · Ludwigshafen, DE
Hubertus Kroner · Ludwigshafen, DE
Andreas Keller · Speyer, DE
Walter Kastenhuber · Mannheim, DE

Key dates

Filing date	Nov 10, 1998
Grant date	Sep 12, 2000
Priority date	—
Expiry date	Nov 10, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S524/92
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing an aqueous polymer dispersion by free-radical polymerization of compounds I and II whose individual solubility in water is very different by the miniemulsion polymerization technique, in which process the reaction mixture is agitated by an external circuit which leads from and back again to the reaction vessel and comprises at least one low-shear pump and at least one heat exchanger having an essentially laminar flow profile. The copolymers prepared in accordance with the invention can be produced in a good yield within short times and exhibit good performance properties.

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