Patent · US Expired

Polymer ammonium borates and processes for their preparation

US5401809A · kind A · utility

18Cited by

7References

7Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Jorg Gitzel · Hattersheim, DE
Detlef Wehle · Burgkirchen an der Alz, DE
Hans-Tobias Macholdt · Darmstadt, DE

Key dates

Filing date	Dec 3, 1993
Grant date	Mar 28, 1995
Priority date	—
Expiry date	Dec 3, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/923
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polymer ammonium borates having a molecular weight from about 5000 to about 500,000 and obtained by homopolymerization of monomers, such as, for example, diallyldialkylammonium chloride, and by copolymerization of mixtures of two monomers, such as, for example, diallyldimethylammonium chloride and diallylmethyloctylammonium chloride, having molar monomer ratios of about 0.5:0.5 to about 0.95:0.05 in the copolymer, followed, if desired, by anion exchange, and mixtures of these compounds. Polymer ammonium borates according to the invention are suitable as colorless charge-control agents in toners and developers for electrophotographic recording processes and as charge-improving agents in powders and coatings for surface coating.

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