Patent · US Expired

Aqueous powder coat dispersions, process for their preparation and their use

US6441078B1 · kind B1 · utility

1Cited by

13References

10Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Karl-Friedrich Doessel · Wiesbaden, DE
Oliver Reis · Witten, DE
Volker Rekowski · Bochum, DE

Key dates

Filing date	Mar 8, 2000
Grant date	Aug 27, 2002
Priority date	—
Expiry date	Mar 8, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D5/02
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Improved aqueous powder coat dispersion, comprising (a) a powder coating dispersed in (b) an aqueous phase, wherein the aqueous phase contains a silica compound selected from the group consisting of (i) 0.2 to 2% by weight, based on the weight of the powder coating, of finely divided silicic acid with large BET-surface; (ii) 0.1 to 1.5% by weight, based on the weight of the powder coating, of layered silicates; and (iii) combinations thereof, exhibit improved sedimentation properties and provide coatings with improved sag characteristics.

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