BYK® -W 969

BYK®-W 969 by BYK is a monofunctional, deflocculating wetting and dispersing additive for amine preaccelerated UP, EP and PUR systems to reduce the viscosity in mineral-filled systems. It extends the gelling time with cobalt accelerators in UP resins. It is a solution of a hydroxy-functional alkylammonium salt of an acidic copolymer. It improves the wetting and dispersing speed of fillers during dispersion and reduces viscosity to enable an increased filler content to be achieved. The higher filler content improves sandability in applied and cured polyester putty compounds. The additive leads to a considerably increase in gelling time in cobalt-accelerated unsaturated polyester resins. Due to its OH functionality, BYK®-W 969 is incorporated in the polymer matrix and is therefore suitable for PUR systems in which fogging and emissions are critical (e.g., automotive applications). The recommended level is UP putty compounds: 0.5-1.5%, PUR systems: 0.5-2%, epoxy systems: 0.5-2% and acrylate systems: 0.5-2%. It is listed in EINECS, TSCA, PICCS, IECSC, ENCS, NZIoC and ECSI. It is in line with Directive 2011/65/EU (EU RoHS 2), as amended by the Delegated Directive (EU) 2015/863 (EU RoHS 3), EU Directive 2002/96/EC (WEEE), EU Directive 94/62/EC (Packaging Waste) and CONEG Toxics in Packaging. It complies with Regulation (EC) No 1907/2006. The shelf life of this product is 36 months.