2021

UV Absorber Main Uses UV Absorber Data

At present, most of the desirable UV absorbers/light stabilizers are complex, especially salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and hindered amines, which can achieve more reasonable results than any single UV absorber. So, is the UV absorber useful? Let's take a look.

Introduction of Ultraviolet Absorber

An ultraviolet absorber is a light stabilizer that absorbs the ultraviolet portion of sunlight and fluorescent light sources without changing itself.

Because the sun's rays contain a large amount of ultraviolet light harmful to colored objects with a wavelength of about 290-460 nm, these harmful ultraviolet light decompose and fade colored molecules through chemical reduction reactions.

There are physical and chemical methods to prevent harmful UV rays from damaging color.

Here is a brief description of the chemical method, that is, the use of UV absorbers to effectively prevent protected objects or reduce their damage to color.

The UV absorber should meet the following conditions

(1) It can strongly absorb ultraviolet rays (especially the wavelength is 290-400 nm);(2) Good thermal stability, no change due to heat even during processing, and low thermal volatility;(3) Good chemical stability, no adverse reaction with the material components in the product;(4) Good miscibility, can be evenly dispersed in the material, no frost spray, no exudation;(5) the absorbent has good photochemical stability, does not decompose, does not change color; ⑥ colorless, non-toxic, tasteless; ⑦ resistance to soaking; ⑧ low price, 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.

UV Absorber Main Uses UV Absorber Data Main Uses of UV Absorber

1. main purpose:

It can effectively absorb ultraviolet light with a wavelength of 270-380 nm, and is mainly used for polyvinyl chloride, polystyrene, unsaturated resin, polycarbonate, polymethyl methacrylate, polyethylene, ABS resin, epoxy resin, cellulose resin, etc. It is suitable for color film, color film, color paper, polymer and other photosensitive materials. Especially suitable for colorless transparent and light color products. Strong absorption, high performance UV absorber.

2. outstanding features:

Ultra-ultraviolet absorption capacity; effectively prevent ultraviolet damage and carcinogenicity to the skin, and greatly improve 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.

3. physical and chemical indicators:

Appearance: light yellow powder melting point: 138 ℃-141 ℃, ash content: ≤ 0.05 volatiles: ≤ 0.1 transmittance: 460 nm ≥ 95%;500 nm ≥ 97% Solubility: soluble in benzene, toluene, ethylene and other solvents, slightly soluble in ethyl acetate, petroleum ether, insoluble in water

Four. Usage:

Generally, the dose is 0.0.5% for thin products and 0.05-0.2% for thick products. Under other process conditions, the addition amount is 0.05-0.3%.