Low formaldehyde emitting crosslinking agents, process of preparation and curable compositions thereof

US6207791A · kind A · utility

Assignee

• Cytec Technologies Corp. · US

Inventors

• John H. Bright · Kendall Park, US
• Barry A. Lawless · Milford, US
• Robert G. Lees · Stamford, US
• Lon-Tang Wilson Lin · Vallejo, US
• Jeno G. Szita · Norwalk, US

Key dates

• Filing date: Aug 9, 2000
• Grant date: Mar 27, 2001
• Expiry date: Aug 9, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D161/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described is a liquid, partially alkoxymethylated melamine crosslinker composition having from about 2.6 to about 4.6 moles of combined formaldehyde per mole of melamine, from about 1.4 to about 4.4 moles of alkyl per mole of melamine, from about 1.3 to about 3.4 moles of NH per mole of melamine, a free formaldehyde level of less than about 0.5 weight percent based on 100 percent solids, and an N-methylol level of less than about 6.0 weight percent; processes for its preparation; a low formaldehyde emitting curable composition containing the crosslinker; as well as a method of coating a substrate and substrates so coated.