Boscodur 4L is a polyisocyanate designed to be used in solvent-based adhesives and coatings where enhanced properties are required. Generally Boscodur 4L (Part B) is blended into the adhesive or coating (Part A) at 2 to 10% levels and used as a batch within 4 to 6 hr of mixing. - Increases the molecular weight and, therefore, enhances the final physical properties of Bostik polyesters for optimum performance
