Learn about uv absorbers, light stabilizers

Light stabilizer GW-540

Three (1, 2, 2, 6, 6-pentamethyl) phosphite esters

Properties and USES The product is white crystalline powder. Melting point 122 ~ 124℃. Soluble in ethanol, chloroform, acetone, benzene and other solvents, difficult to dissolve in water.

This product is a kind of blocked light stabilizer, it has no ability to absorb ULTRAVIOLET ray itself, but it can capture the active radical produced by polymer degradation, decompose hydroperoxide and transfer the energy of excited state molecule, etc., the light stability effect is 24 times as much as that of general ultraviolet absorber. This product is suitable for polyethylene, polyethylene and other plastics. It has good compatibility with resin and good processing performance. Besides light stability, it also has good thermal and oxygen aging resistance. But the heat resistance of the product is poor, should not be used in hot water medium for a long time. In addition, the product should be processed and used below 270℃ as far as possible.

Safety Precautions This product has low toxicity.

Commercial name: Light stabilizer 744

It is divided into 4-benzoyl oxy-2, 2, 6, 6-tetramethylpiperidine

Properties and USES The product is white crystalline powder. Melting point 95 ~ 98℃, decomposition temperature 280℃ above. Soluble in acetone, ethanol, ethyl acetate, toluene, insoluble in water.

This product is a kind of blocked light stabilizer, it has little ability to absorb ultraviolet light, but it can effectively capture the active free radical produced by the polymer material under the action of ultraviolet light, so as to play the role of light stability. The product is suitable for polypropylene, polyethylene, polystyrene, polyurethane, polyamide, polyester and other plastics, especially in polyolefin. The light resistance of this product is several times that of the general uv absorbent. No staining, no pollution, good heat resistance, with antioxidant and uv absorbent, excellent synergistic effect.

2, 4, 6-tri (2 'n-butoxyl) -1, 3, 5-triazine

Divided into 2, 4, 6-tris (2 'n-butoxyl phenyl) -1, 3, 5-triazine

Properties and USES The product is a light yellow powder. The melting point of 156165. Soluble in hexamethylphosphotriamine, soluble in dimethylformamide when heated, slightly soluble in n-butanol, insoluble in water.

This product is ultraviolet absorber, can absorb the ultraviolet ray with the wavelength of 300 ~ 380nm, suitable for PVC, polyformaldehyde, chlorinated polyether and other plastics, the general dosage is 0. Its light stability efficiency is better than UV-9 and UV-531, but the product has coloration, can make the product with light yellow, and the compatibility with resin is poor.