In view of the harmfulness of ultraviolet light to the human body, the protection of ultraviolet radiation has attracted more and more attention. Alfa Chemistry offers a range of UV resistant finishes to meet your search for UV resistant needs for fiber materials.
Classification
According to the mechanism of action of anti-ultraviolet finishing agents, they can be divided into two categories: physical reflection type and chemical absorption type. The former is to reduce ultraviolet radiation through physical reflection or scattering. The latter uses chemical technology to absorb ultraviolet rays in sunlight to reduce the transmittance of ultraviolet rays and achieve the purpose of anti-ultraviolet radiation.
Reflecting or scattering UV-resistant finishing agents, also known as inorganic UV-resistant finishing agents, include titanium dioxide powder, ceramic powder, zinc oxide, etc.
Absorptive anti-ultraviolet finishing agents, also known as organic anti-ultraviolet finishing agents, mainly include salicylates, benzophenones, benzotriazoles, substituted triazines and substituted acrylonitriles.
Typical Products & Properties
- Salicylate And Its Derivatives
Effective absorption wavelength range: 290 ~ 320 nm
Application: They can be used for polyethylene, polypropylene, polyoxyethylene, polyamide fibers and their products.
Representative compounds: phenyl salicylate, p-tert-butyl phenyl salicylate, etc.
- Benzophenone And Its Derivatives
Effective absorption wavelength range: 280 ~ 340 nm
Application: They can be used for cellulose, polyester, polyamide, polypropylene fiber and their plastics, etc.
Representative compounds: 2-hydroxy-4-methacryloyloxybenzophenone, 2-hydroxy-4-allyloxybenzophenone, etc.
- Benzotriazole And Its Derivatives
Effective absorption wavelength range: 300 ~ 400 nm
Application: A type of UV absorber that is widely used in the industrial field.
Representative compounds: 2-(2'-hydroxy-5'-vinylphenyl)benzotriazole and 2-(2'-hydroxy-5'-methylvinylphenyl)benzotriazole and so on.
- Substituted Acrylonitrile And Its Derivatives
Effective absorption wavelength range: 310 ~ 320 nm
Advantages: It does not contain phenolic hydroxyl groups, so it has good chemical stability and compatibility with polymers.
Application: Suitable for the processing of polyvinyl chloride, acetal resin, polyolefin, epoxy resin, polyamide, acrylic resin, polyurethane, urea-formaldehyde resin and nitrocellulose.
Representative compound: N-35 acrylonitrile UV absorber
- Substituted Triazines And Their Derivatives
Effective absorption wavelength range: 280 ~ 380 nm
Features: low toxicity, good compatibility with resin.
Application: Can be used as light stabilizer for polyethylene, polypropylene, polybutylene, polystyrene, polyurethane, etc.
Ideal UV Resistant Finishing Agents
Generally speaking, suitable conditions for anti-ultraviolet finishing agents for fiber materials and their products include:
- A wide wavelength range of ultraviolet absorption (280 ~ 400 nm), a large absorption coefficient (greater than 45%), and stable absorption.
- The product should be safe, non-toxic, and free of irritating and other harmful odors.
- In line with ecological and environmental protection requirements, and the organic halide (AOX) and chemical oxygen demand (COD) in the waste liquid of the finishing agent are low.
- Compatible with other chemicals.
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