Neale J.,Perstorp AB
European Coatings Journal | Year: 2013
The molecular weight of the products can be controlled and therefore highly designed, functional polyols can be manufactured for specific applications. Inclusion of both monomers in the reaction allows, but is not restricted to, random copolymers. The various co-polyols were produced as described below and used as prepared. Dimethyloipropionic acid (Bis-MPA) was provided by Perstorp AB. Isophorone diisocyanate (IPDI) was used as the isocyanate, N-methyl-2-pyrrolidone (NMP) was used as a solvent, triethylamine (TEA) as the neutralizing agent and ethylene diamine (EDA) as the chain extender. Hydroxyl content and molecular weight were calculated using a back titration method with acetic anhydride and potassium hydroxide with pyridine. The acid value was determined using a titration with potassium hydroxide with acetone as a solvent for the polyol. The co-polyols, BiS-MPA and NMP were added to a 700 ml glass reactor equipped with a cooler and a stirrer. The mixture was heated until a clear and transparent solution was achieved.
Perstorp Ab | Date: 2010-08-03
Chemicals, namely, polyhydric polyether and polyester alcohols and derivatives thereof for use in the chemical and resin industry; hyperbranched polymers for use in the chemical and resin industry; hyperbranched polymers for use in the manufacture of molded plastic articles and thermosetting and thermoplastic composites; hyperbranched polymers for scientific, medical and research use; synthetic resins, namely, epoxy resins, for use in the manufacture of thermosetting composites; acrylates and methacylates for use in the chemical and resin industry; acrylated and methacrylated monomers and diluents for use in the chemical and resin industry; chemical additives for neat and reinforced epoxy resins; chemical additives for thermoplastic blends and composites; polyurethanes used in the manufacture of elastomers, foams and resin injection moldings.