Ultraviolet radiation absorbents for thermoplastic polymers and methods of producing same

摘要

An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1x10-3-1 and/or a chlorine ion content in the range of 1x10-1-1x103 ppm.