Hope PR25
Introduction:Uv absorber PR25 is a UV absorber with strong absorption of UVB band.The product remains colorless in high concentration masterbatch and will not bring any color change or stainto the product, will not form a dark complex with the metal ions in the resin. PR25 is benzene armour pymalonate type colorless UV absorbent, providing effective absorption in low wavelength ultraviolet light UV-B. Its maximum absorption peak is 308nm.
Chemical name: dimethyl 2-[(4-methoxyphenyl)methylidene]propanedioate
CAS No.: 7443-25-6
Specification:
Item | Standard |
Appearance | White powder |
Purity | 99.0%min |
Melting point | 55-60℃ |
Volatile | <=0.5% |
Light transmittance | >= 95% (425nm) >= 98%（500nm） |
TGA | 208℃(10%) |
Solubility 23°C (g / 100ml solvent) | |
Acterone> 100 | dichloromethane> 100 |
Toluene 71 | xylene isomers mixture 51 |
Ethyl acetate 96 | methanol 21 |
water <0.1 | |
Application:
PR25 can be used in solvent-based coatings with low color requirements, generally industrial coatings, and also in UV-curable coatings and varnishes with high color requirements.
In plastic systems, it is recommended for PVC, polyester, PC, polyamide, styrene, EVA copolymers, cellulose products. The amount added in polar plastics such as PS, PC, PVC is about 0.1-0.3% of the total.
Packaging: 25 KG/box
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