| Waterbased aliphatic blocked polyisocyanate. Baybond® XL 825 is suitable for use as a crosslinker for glassfiber sizings. In combination with Bayhydrol® polyols Baybond® XL 825 can be used for the formulation of water-reducible, lightfast one-component polyurethane baking coatings and as an additive in waterborne baking systems to improve flexibility, impact strength and adhesion. Properties / Applications: Baybond® XL 825 was developed as crosslinker for the sizing of glass fibers used in combination with Baybond binders to reinforce thermoplastics, particularly polyamide. Glass fiber sizes based on Baybond® XL 825 are characterized by their good colorfastness, even at elevated temperatures. The mechanical film properties of sizings based on Baybond® XL 825 are developed fully by postcrosslinking at temperatures from 170 °C for a duration of 20 minutes. The product is compatible with the additives normally used in the formulation of glass sizes, e.g. adhesion promoters, lubricants, antistatic agents and plasticizers. Information provided by Covestro |
