Vinac DPN890 DEV crosslinkable poly(vinyl acetate) Air Products Polyvinyl acetate emulsions & derivatives (PVAc…) >> PVAc homopolymers ADHESIVE Vinac DPN890 DEV polymer emulsion is a crosslinkable poly(vinyl acetate) emulsion that is pre-catalyzed and formulated to be ready for use. Intended applications are those that require a wood adhesive that meets U.S. Type 2 or European D3 water resistance standards. Its properties include: excellent water resistance; very good heat resistance; good resistance to static load; and a very fast setting speed in room temperature cold press, hot press or radio frequency (RF) applications. A unique characteristic of Vinac DPN890 emulsion is its unique balance of pre-catalyzed viscosity stability and water resistance performance, unsurpassed by any other adhesive available in this classification. Vinac DPN890 emulsion shows strong adhesion to porous and cellulosic surfaces like paper, wood and cloth. The emulsion provides tough films that have outstanding water resistance when cured. Compounding If needed, Vinac DPN890 emulsion can be further formulated with various fillers, thickeners and extenders. 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. Vinac DPN890 emulsion will accept fillers like clay, uncooked cornstarch, wood flours, shell flours or other fillers. Calcium carbonate or other fillers with a high pH are not recommended since they would interfere with the crosslinking reaction. If a lower viscosity is desired, water can be used to dilute the adhesive. Vinac DPN890 emulsion is compatible with other emulsions, especially other homopolymers like the Vinac XX series emulsions. The level of catalyst should be adjusted to maintain performance as fillers or extenders are added. Pre-catalyzed Vinac DPN890 emulsion is acidic in nature; the use of alkali additives will decrease stability and performance. Vinac DPN890 emulsion can be thickened with hydroxyethyl cellulose, poly(vinyl alcohol) or associative thickeners. It is recommended that Vinac DPN890 emulsion is used within six months of receipt. Applications Vinac DPN890 polymer emulsion meets the following wood adhesive specifications: • Water resistance requirements of ANSI-HPVA [HP-1-1994] “Type 2” and strain group D3 of DIN EN 204. • Heat resistance requirements of ASTM D 5751- 95 and WATT 91. Vinac DPN890 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 core stocks. Vinac DPN890 emulsion is suitable for radio frequency gluing, as well as hot press and cold press operations. Typical end uses include furniture parts assembly and various door constructions like architectural doors, fire doors, and stile and rail doors. Water-resistant and heatresistant constructions include finger-jointed millwork for frames, moldings and doors. Plywood constructions or veneering operations can be hot pressed or cold pressed. Other miscellaneous applications include water-resistant paper cores, paint roller cores and fiberglass sizing. Cured gluelines have excellent sandability. Vinac DPN890 emulsion has been formulated to a minimum film formation temperature of 54 °F (12 °C). For proper performance, the application temperature of the adhesive and substrates should be above this temperature. Crosslinkable poly(vinyl acetate) pre-catalyzed emulsion. Good water resistance, very good heat resistance, good resistance to static load and a fast setting speed in room temperature cold press, hot press or radio frequency (RF) applications. Shows strong adhesion to porous and cellulosic surfaces like paper, wood and cloth. High adhesion to glass. Provides tough, slightly hazy films with little flexibility.