Patent · US Expired

Radio hardenable powder paints

US6787581B2 · kind B2 · utility

1Cited by

4References

18Claims

0Family size

Assignee

BASF COATINGS GMBH · DE

Inventors

Rainer Blum · Ludwigshafen, DE
Horst Hintze-Bruening · Münster, DE
Uwe Meisenburg · Duisburg, DE

Key dates

Filing date	Oct 22, 2002
Grant date	Sep 7, 2004
Priority date	—
Expiry date	Jan 25, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D167/07
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to powder coating material curable with high-energy radiation, comprising an unsaturated polyester resin (A) and a polymeric crosslinker (B) containing, based on the polymer main chain, terminal and/or pendant propenyl, butenyl and/or isoprenyl groups. The unsaturated polyester resin (A) and/or the polymeric crosslinker (B) comprise structural units of the general formula I and/or II. These novel powder coating materials are curable with high-energy radiation, preferably UV light, and are notable in particular for a very good viscosity stability during the preparation, in the melt, of the resins and the compounding of the coating materials, for outstanding coating properties, and for a low oxygen sensitivity on curing. The films resulting after the cure, moreover, exhibit outstanding elasticity.

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