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Main uses of UV absorbers; UV absorber data
Currently, most ideal UV absorbers/light stabilizers are composite, especially salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines, and hindered amines, which achieve more reasonable effects than any single UV absorber. So, are UV absorbers useful? Let's find out.
Introduction to UV Absorbers
A UV absorber is a light stabilizer that absorbs the ultraviolet portion of sunlight and fluorescent light sources without changing itself.
Because sunlight contains a large amount of ultraviolet light harmful to colored objects with wavelengths of about 290-460 nanometers, this harmful ultraviolet light decomposes and fades colored molecules through chemical reduction reactions.
There are physical and chemical methods to prevent harmful UV damage to color.
Here, only the chemical method is briefly introduced, that is, using UV absorbers to effectively prevent or weaken the damage to the color of the protected object.
UV absorbers should meet the following conditions
(1) Can strongly absorb ultraviolet light (especially wavelengths of 290-400 nanometers); (2) Good thermal stability, will not change due to heating even during processing, and has low thermal volatility; (3) Good chemical stability, does not react adversely with the material components of the product; (4) Good miscibility, can be uniformly dispersed in the material, no frosting, no exudation; (5) The absorber has good photochemical stability, does not decompose, and does not change color; (6) Colorless, non-toxic, and odorless; (7) Immersion resistance; (8) Low price and easy to obtain; (9) Insoluble or insoluble in water.
UV absorbers can be divided into the following categories according to their chemical structure: salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines, and hindered amines.
Main Uses of UV Absorbers UV Absorber Data Main Uses of UV Absorbers
I. Main Uses:
It can effectively absorb ultraviolet light with a wavelength of 270-380 nanometers and is mainly used in polyvinyl chloride, polystyrene, unsaturated resins, polycarbonate, polymethyl methacrylate, polyethylene, ABS resin, epoxy resin, cellulose resin, etc.; suitable for photosensitive materials such as color films, color films, color paper, and polymers. Especially suitable for colorless, transparent, and light-colored products. Strong absorption capacity, high-performance UV absorber.
II. Outstanding Features:
Ultra-UV absorption capacity; effectively prevents UV damage and carcinogenicity to the skin, greatly improving the anti-aging performance of the product. It hardly absorbs visible light and is the preferred UV absorber for colorless, transparent, and light-colored products. Non-flammable, non-corrosive, good storage stability; and can be used with ordinary antioxidants. Very safe.
III. Physicochemical Indicators:
Appearance: Light yellow powder Melting point: 138℃-141℃, Ash content: ≤0.05% Volatiles: ≤0.1% Transmittance: 460nm ≥95%; 500nm ≥97% Solubility: Soluble in benzene, toluene, ethylene, etc. solvents, slightly soluble in ethyl acetate, petroleum ether, insoluble in water
IV. Usage:
Generally, the dosage for thin products is 0.0.5%, and the dosage for thick products is 0.05-0.2%. Under other process conditions, the addition amount is 0.05-0.3%.
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Contact person: Mr. Yang
Tel: 18857019806;13665709588
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