用于防护涂料应用的抗紫外线环氧树脂的评估.pdf

1、Advanced MaterialsEvaluation of UV Resistant Epoxies for Protective Coating ApplicationsMitch BuchananTechnical Account Manager,InfrastructureHuntsman Advanced Materials Safety Share Experiment purpose and overview Low yellowing epoxies Experiment plan Evaluation results System properties QUV-A resu

2、lts Conclusion and questionsAgendaCTT Summit2Safety ShareCTT Summit3Experiment purpose and overview4 Epoxy based protective coatings Typically provide excellent adhesion,chemical resistance,strength,and durability Limited gloss retention and yellowing resistance under UV exposure Most common epoxide

3、s have aromatic chemical structure In use often aliphatic polyurethane,polyurea or acrylic topcoats are specified Cycloaliphatic resins and hardeners allow formulation of epoxies for maximized UV stability Cycloaliphatic systems have better gloss retention and reduced yellowing compared to standard

4、aromatic epoxies but are often hindered by slow cure times without heat Low yellowing epoxy systems could eliminate the need for a traditional 3 coat system Potential to reduce project time and raw material costs with 1 or 2 coat systemsPurpose of experimentExperiment purpose and overview5 Neat resi

5、n&hardeners(unmodified and without filler)evaluated as clear coatings 3 cycloaliphatic epoxy resins and 3 formulated cycloaliphatic amines hardeners Aromatic Bis-A DGE liquid epoxy resin was used as the epoxy control Solvent borne polyurethane based clear top coating used as a commercial technology

6、benchmark Testing Protocol Physical properties were measured on standard Q-panels QUV-A exposure test according to ASTM G-53 using clear glass panelsExperiment ParametersExperiment purpose and overview6Raw Material SpecificationsExperiment purpose and overview7NumberTypeSolids Content%Color,GardnerV