环保型聚氨酯涂料的研究进展

综述了环保型聚氨酯固化剂品种、性能与应用,阐述了水性聚氨酯涂料分类、制备方法和改性研究以及聚氨酯粉末涂料和有机硅聚氨酯功能涂料的改性研究进展。讨论了聚氨酯固化剂中游离单体脱除的工艺和方法,建议采用聚合与高效分离技术相结合的方法降低聚氨酯固化剂中残留游离异氰酸酯单体含量。指出聚氨酯涂料的发展趋势为进一步完善高固体含量羟基树脂的制备技术,发展无异氰酸酯基的潮固化聚氨酯涂料,充分利用可再生的植物油制备无溶剂聚氨酯涂料。

Development of environment friendly polyurethane coatings

The varieties, properties and application of environment friendly polyurethane (PU) curing agents were summer-ized. The categories, preparation methods and modification studies of waterborne PU coatings, as well as the research progress of PU powder coatings and silicone PU coatings were reviewed. The processes and methods of removing free monomers from PU curing agents were discussed. It was suggested that highly efficiency and environment friendship methods of decreased the content of residual free isocyanate monomers in PU agents should be attained by using polymerization combining with highly efficient separation technology. The possible developing trends of PU coatings were pointed out that the preparation technology of hydroxyl resin with high solid content would be improved, the -NCO free water vapor cross-linked PU coatings would be developed, and solvent free PU coatings would be prepared by using renewable plant oils.