Reactive thermally-curing and/or radiation-curing paints and their curing methods

US7091256B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Markus Bischof · Warthausen, DE
• Elisabeth Gemmler · Ulm, DE
• Fritz Mezger · Schenefeld, DE
• Thomas Raith · Westerstetten, DE
• Christoph Ruechardt · Bodolz, DE

Key dates

• Filing date: Jun 22, 2004
• Grant date: Aug 15, 2006
• Expiry date: Aug 2, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/027
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A reactive paint to be completely cured in air with binders that bear ethylenically-unsaturated groups, that can be cured by radical polymerization either thermally or both thermally and by UV light or high-energy radiation in a dual-cure method. The paint contains a combined initiator system consisting of thermal initiators and UV initiators and reactive oligomers that are formed from addition compounds of a reactant of formula (4)and a reactant of formula (5)In this formula, X=—CO—CH═CH2 or —CnHm or —CO—CnHm. —CnHm is an aliphatic residue with 1 to 3 C atoms, whereby 0, 1, 2 or 3 X substituents are formed by —CnHm, and Y is a hydrocarbon chain of 3 to 8 atoms that can also contain heteroatoms. Also provided is a method for curing by radical polymerization. The polymerization is first started thermally under air and then is continued either thermally or photoinitiated under air or protective gas, and a use in paint systems, especially in automobile manufacturing or as a binder.