Patent ID: 6051633
Filing Date: 2000-04-18
Classification: C08G,C09D

Abstract:
A process for producing an air-dry alkyd-stabilized non-aqueous dispersion of addition polymers in an alkyd medium, having a non-volatile materials content greater than about 70% and a volatile organic content less than about 305 grams/liter, comprising:a) selecting an alkyd having a non-volatile materials content of at least 75% and a z-average molecular weight, Mz, between about 10,000 and about 250,000, and having a polydispersity between about 2.0 and about 20, andb) selecting one or more monomers which are substantially free of acid functionality and predominantly insoluble in the alkyd, wherein at least one monomer has hydroxy-functionality;c) polymerizing the one or more monomers in the alkyd medium via a free radical addition mechanism in the presence of a mercaptan-containing chain transfer agent.