CHEMK UV-234 is a high molecular weight hydroxyphenyl benzotriazole UV absorber with excellent photostability for a large number of polymers. It is especially suitable for large surface objects which can protect polymers and pigments from UV radiation, add and save their performance and appearance.
CHEMICAL STRUCTURES:
CAS NO.:70321-86-7
Physical Properties：
Appearance: Light yellow powder
Melting point: 139.5 -141 ℃
Molecular weight: 447.6g/mol
Transmittance: 460nm >= 97%;
500nm >= 98%
Application：
CHEMK UV-234 is an excellent light stabilizer used in PE, pp, polyester and coatings. It is very effective for polymers that need to be processed at high temperature and no UV absorption loss allowed, such as polycarbonate, polyester, polyacetal, polyamide, polyphenylene sulfide, Polyphenylene oxide, aromatic copolymer, thermoplastic polyimide, polyimide fiber, and polyvinyl chloride, styrene monopolymer and copolymers. It can also be used in mould, film, boards and fiber.