Chitec Technology Co., Ltd.
George Mauer is a Senior Scientist at Chitec Technology Co. Ltd. and focuses mostly on the use of UVA, HALS and AO’s in the stabilization of organic materials. He has 36 years experience at PPG Ind in a variety of solvent-based, water-based and powder coatings and resin technologies. George contributed to all Automotive coating layer technologies and culminated his OEM tenure as the Global Director of Sprayable Technologies. He holds 12 US Patents. George received his BS in Chemistry from Bates College and a PhD in physical organic chemistry from Dartmouth College.
Adding UV absorber (UVA) is a simple but efficient way to upgrade coatings against sunlight exposure. However, the migratory nature of UVAs limits formulators to improve weather resistance by increasing the dosage and besides, various environment factors could be able to remove/ extract UVAs from coating layers, decreasing the effective dosage over time. A reactive UVA could be an ultimate solution. In this research, a novel benzotriazole (BTZ) UV absorber is introduced. It carries two primary hydroxyl groups, which can react with isocyanates and melamine resins and covalently bond with the polymer backbone. We use solvent/ simulant extraction as an accelerated migration simulation to demonstrate the non-migration performance of reactive type comparison against other additive type UVAs. This advanced technology overcomes the migration issue and dramatically improves the coatings performance to levels that were otherwise unattainable.