Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface-coating solid objects

US5021473A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Tobias Macholdt · Darmstadt, DE
• Alexander Sieber · Frankfurt am Main, DE
• Claus Godau · Kiedrich, DE
• Albrecht Manz · Wiesbaden, DE

Key dates

• Filing date: Nov 3, 1988
• Grant date: Jun 4, 1991
• Expiry date: Nov 3, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/034
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Process for enhancing the electrostatic chargeability of powder coatings or powders, and the use thereof for surface coating solid objects. Process for enhancing the electrostatic chargeability of powder coatings or powders intended for the surface-coating of solid objects, by homogeneously incorporating at least one salt-like, cationic compound of the formula (1) ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of one another, denote hydrogen atoms, straight-chain or branched alkyl groups having 1 to 30 carbon atoms, mononuclear or polynuclear cycloaliphatic radicals having 5 to 12 carbon atoms, oxethyl groups of the general formula --(CH.sub.2 --CH.sub.2 --O).sub.n --R in which n denotes a number from 1 to 10 and R denotes a hydrogen atom, a (C.sub.1 -C.sub.4)alkyl or acyl group, furthermore denote mononuclear or polynuclear aromatic radicals or araliphatic radicals, where the aliphatic, aromatic and araliphatic radicals may be substituted, and where the alkyl, cycloalkyl, aralkyl and aryl radicals for R.sub.1 to R.sub.4 may be substituted by halogen atoms, X denotes a phosphorus, arsenic or antimony atom, where, in the case where X denotes an arsenic or ant…