Polyesters for packaging and coil coatings

DYNAPOL® 
HIGH-MOLECULAR WEIGHT COPOLYESTERS.
MEDIUM-MOLECULAR WEIGHT COPOLYESTERS. 


SATURATED POLYESTER RESINS FOR STOVING ENAMELS 

By developing saturated polyesters,  Evonik has played an important role in influencing and extending the possible 
applications of precoated metals.  These coating raw materials are suitable for the production of coatings with very 
good adhesion offering an optimum of  flexibility and formability together with an excellent surface hardness. For this reason, lacquers based on DYNAPOL® have proved particularly suitable for stampable and deep drawable coatings. A wide range of products is available for various requirements of the paint and coating industry. DYNAPOL® polyester resins are mainly used for stoving enamels in combination with amino resins. Special properties, such as chemical resistance, weathering resistance and flexibility, can be improved by using blocked polyisocyanate resins. Stoving enamels based on 
highmolecular weight copolyesters  show particularly good mechanical properties. Medium molecular weight polyester resins containing more hydroxyl groups are suitable for the manufacture of stoving enamels with good reactivity and high solids content. In combination with highmolecular weight copolyesters the quality of films can be optimized. Depending on the technical require ments and the method of processing, DYNAPOL® grades can also be used to manufacture industrial coatings.


DYNAPOL® UB
BLOCKED ONE PACK POLYESTER-POLYURETHANE SYSTEMS.


PUR SYSTEMS FOR STOVING ENAMELS

DYNAPOL® UB systems are made from  saturated, hydroxylated polyester resins and blocked, cycloaliphatic polyisocyanate 
crosslinkers.  Evonik pioneered the development of PUR chemistry for coatings and now offers a range of high quality monomers, polyisocyanates, prepolymers and PUR systems based on VESTANAT®. DYNAPOL® UB systems are suitable for the manufacture of industrial coatings, particularly coil coatings with high formability, good surface hardness and 
outstanding weatherability.  Because of these properties special DYNAPOL® UB types are also used to formulate high quality, storage stable, 1-pack PUR spray coatings. The performance profile of DYNAPOL® UB-stoving enamels can be adjusted to the various enduses by suitable paint formulations. Particularly the modification with special Polyamide 12 fine 
powders (VESTOSINT®) results in special surface textures along with outstanding abrasion resistance and reduced tendency for dirt pick-up.