E.i. Dupont De Nemours and Company

Darryl W Brixius

John A Simms

Articles comprising a substrate coated with selected isocyanatoalkyl (meth)acrylate polymers or copolymers, e.g., a copolymer of 2-isocyanatoalkyl methacrylate and butyl acrylate, are claimed.

Coated article

Low molecular weight isocyanate-functional acrylic polymers prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent are good coating materials applicable to a substrate as by spraying and curable by contact with moisture.

Coatings formed from isocyanate-functional polymers containing a

Low molecular weight polydisperse isocyanate-functional acrylic polymers are prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent and a polymerization initiator but in the substantial absence of water and of Lewis-type bases.

Preparation of isocyanate-functional polymers containing a terminal

Low molecular weight polydisperse isocyanate-functional acrylic polymers are provided which contain terminal monosulfide groups on at least 10% by number of polymer molecules but are substantially free of toxic monomeric isocyanates. The polymers are prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent and a polymerization initiator but in the substantial absence of water and of Lewis-type bases. They can be crosslinked and are useful in a variety of applications such as moisture-curing coating compositions.

Isocyanate-functional polymers containing a terminal monosulfide group

Low molecular weight isocyanate-functional acrylic polymers are provided, which contain at least 10% by weight of copolymerized isocyanatoalkyl (meth)acrylate, are substantially free of toxic monomeric isocyanates, and have the following general structure: ##STR1## where R is alkyl or aryl,

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Grosse Ile, MI, United States of America

Darryl W Brixius