Air curing water base copolymers and method of preparation

• Main Author: SAAM JOHN C
• Format: Patent
• Language: English
• Published: 23.01.2001
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

An aqueous dispersion comprising a copolymer which is the polymerization product of a mixture of vinylic monomers wherein from about 5% to about 90% by weight of the vinylic monomers are selected from co-esters of a drying oil acid and an unsaturated alpha, beta-polymerizable unsaturated carboxylic acid, contains from about 0.5% to about 50% by weight based on the weight of the copolymer of a hydrophobic ester or partial ester of a drying oil acid and a polyol. The copolymer polymerized in the presence of the hydrophobic ester or partial ester is characterized by a relatively low gel content, and by a relatively broad, multi-nodal, molecular weight distribution, including a low molecular weight component which acts as a transient plasticizer and coalescing agent. The aqueous dispersions can be formulated into quick drying coating compositions which form smooth protective films on various substrates, without requiring volatile coalescing agents.