Vinac 1000 vinyl acetate homopolymer Air Products Polyvinyl acetate emulsions & derivatives (PVAc…) >> PVAc homopolymers Vinac 1000 emulsion is a vinyl acetate homopolymer with crosslinking functionality, which can be used as the base for exterior and radio frequency, curable-wood adhesives. When catalyzed, Vinac 1000 emulsion will provide a bond that meets exterior water resistance requirements on fir. Compounding with resole phenolic resins creates exterior boiling waterresistant bonds. Vinac 1000 emulsion has excellent initial green strength when wood bonds are cured via radio frequency curing equipment. Vinac 1000 emulsion shows strong adhesion to porous and cellulosic surfaces like paper, wood and cloth. The emulsion provides clear, tough films that have outstanding water resistance when cured. Vinac 1000 emulsion can be cured with an acid catalyst. This system combines the easy handling and fast setting characteristics of a poly(vinyl acetate) emulsion with the excellent water resistance of self-curing resins. A pot life of 16 hours or more can be obtained with Vinac 1000 emulsion and a number of other acid catalysts. Cured gluelines have excellent sandability. Compounding Vinac 1000 emulsion is compatible with a wide variety of compounding ingredients. A variety of acid catalysts may be used in conjunction with Vinac 1000 emulsion to produce the desired highly crosslinked water and heat-resistant bonds. Common catalysts are 50 percent aluminum chloride solution (AlCl3•6H2O), and paratoluene sulphonic acid solutions. Prior to use, Vinac 1000 emulsion should be catalyzed with 5 parts of acid catalyst per 100 parts emulsion. These catalysts are extremely acidic and extreme care should be exercised during their use. The pot life of p-toluenesulphonic sulphonic acid-catalyzed adhesives will be about 4 hours, unless buffered. Aluminum chloride will yield a 16-hour pot life. To improve the water resistance of the adhesive film to meet exterior requirements, Vinac 1000 emulsion may be compounded with 5–10 parts of a water miscible resole phenolic. Vinac 1000 emulsion will accept fillers like clay, uncooked cornstarch, wood flours, shell flours or other fillers. If a lower viscosity is desired, water can be used to dilute the adhesive. Vinac 1000 emulsion is compatible with other emulsions, especially other homopolymers like the Vinac XX emulsion series. Alkaline fillers may interfere with the acid cure process. Vinac 1000 emulsion can be thickened with hydroxyethyl cellulose, poly(vinyl alcohol) or associative thickeners. Thickeners with carboxyl functionality should be avoided due to poor aging characteristics. Condensation reactions with additives such as urea formaldehyde resins, phenol formaldehyde resins and melamine formaldehyde resins are all possible. Acid catalysis with paratoluene sulphonic acid, ammonium sulfate or ammonium chloride at a level of 0.5-2 parts per 100 parts of wet emulsion will produce cross-linked films. The use of the buffer 2-amino-2-methyl-1-propanol or ammonia can yield a prolonged shelf life. It is recommended that Vinac 1000 emulsion be used within three months of receipt. Applications: Vinac 1000 polymer emulsion is used in a variety of wood bonding applications like composite panel, panel on frame construction, edge gluing, face gluing, finger jointing and laminating of various corestocks. Vinac 1000 emulsion is suitable for radio frequency gluing, hot press or cold press operations. Typical end uses include various door constructions like architectural doors, fire doors and interior doors. Exterior constructions include finger-jointed millwork for windows and doors, and cutstock lumber. Plywood constructions or veneering operations can be hot pressed or cold pressed. Other miscellaneous applications include water-resistant paper cores and fiberglass sizing. Vinyl acetate homopolymer emulsion with crosslinking functionality. Polyvinyl alcohol protected. Can be used as the base for exterior and radio frequency gluing, hot press or cold press operations, curable-wood adhesives. Shows strong adhesion to porous and cellulosic surfaces like paper, wood and cloth. High adhesion to glass. Provides clear, tough films that have outstanding water resistance when cured (can be cured with an acidcatalyst).