Tiangang® UV-237

Name: Tiangang® UV-237
Brand: Tiangang

High-efficiency UV Absorber · UV-237

highly efficient UV absorber for a varie

In one sentence: A benzotriazole UV absorber with an initial melting point of 80 °C and a flash point of 229 °C, for UV protection of plastics and elastomers.

Initial melting point: 80 °C (source: spec table on this page)
Temperature at 2% weight loss: >200 °C (source: spec table on this page)
Flash point: 229 °C (source: spec table on this page)
Packaging: 20 kg or 25 kg per box (drum) (source: packaging note on this page)

Key Advantages

a) Efficient UV absorption
Efficient UV absorption

b) Good light stability
Good light stability

c) Low volatility
Low volatility

d) Good resin compatibility
Good resin compatibility

Technical Data

Chemical name	Benzotriazol derivatives
Description	UV absorber Tiangang® UV-237 is a highly efficient UV absorber for a variety of plastics and other organic substrates, including polyolefins, and most engineering plastics, as well as PVC, PMMA, PU, PET, POM, polyesters, and various elastomers (TPU, TPE), and adhesives. Tiangang UV-237 features strong UV absorption, low initial color, broad compatibility, and moderately low volatility. When added to the substrates, it protects the substrate from UV degradation, preserving the original appearance and physical integrity of molded articles, films, sheets, and fibers during outdoor use. Dosage level of Tiangang® UV-237 is between 0.10 and 1.0%, depending on substrate and performance requirements. When used in combination with Tiangang® series of Hindered Amine Light Stabilizers (HALS), synergistic performance is often observed.

Chemical name

Benzotriazol derivatives

Description

　

UV absorber Tiangang® UV-237 is a highly efficient UV absorber for a variety of plastics and other organic substrates, including polyolefins, and most engineering plastics, as well as PVC, PMMA, PU, PET, POM, polyesters, and various elastomers (TPU, TPE), and adhesives. Tiangang UV-237 features strong UV absorption, low initial color, broad compatibility, and moderately low volatility. When added to the substrates, it protects the substrate from UV degradation, preserving the original appearance and physical integrity of molded articles, films, sheets, and fibers during outdoor use.

Dosage level of Tiangang® UV-237 is between 0.10 and 1.0%, depending on substrate and performance requirements. When used in combination with Tiangang® series of Hindered Amine Light Stabilizers (HALS), synergistic performance is often observed.

	Appearance	Melting range °C	Volatility 2% weight loss, °C	Flash point °C
Tiangang® UV-237	Slightly yellow powder	80 ~ 105	> 200	229

Tiangang® UV-237	Acetone	Chloroform	Cyclohexane	Ethyl acetate	n-Hexane	Methanol	Water
Tiangang® UV-237	8	41	15	16	11	0.5	< 0.01

Tiangang® UV-237	UV absorber use of proper protective equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling. Store the product in a cool, dry, well-ventilated area away from incompatible materials.

Disclaimer	The information supplied is presented in good faith and has been derived from sources believed to be reliable. Since conditions of use are beyond our control, all risks are assumed by the user. No representation is expressed or implied, and nothing herein shall be construed as permission or recommendation to practice a patented invention without license.

Frequently asked questions

How do UV-237, UV-326 and UV-327 compare?

All three are benzotriazole UV absorbers; the differences come from the substituents — absorption band, volatility and compatibility. Choose by substrate processing temperature and the absorption band you need, and verify in the actual formulation.

How does UV-237 behave on initial colour?

Initial colour is light, so the effect on the hue of pale and transparent parts is small. That is one reason it is common in moulded appearance parts.

Should it be used with a HALS?

A UV absorber only blocks UV; it does nothing about radicals already formed. Thin parts normally use both; in thick parts it depends on how deep the UV actually penetrates.

The figures and guidance above follow Tiangang's published technical material and common industry practice. For a specific formulation, refer to the batch COA and the technical agreement between the parties.

Technical reviewTiangang Technical CenterVersion2026-11-07

Specifications and application notes on this page are compiled from Tiangang's published technical data. Actual values are governed by the COA shipped with each lot and the technical agreement confirmed by both parties.

Related Products

UV-360 UV-326 UV-327 UV-328

Certifications

National High-Tech Enterprise
Vice Chairman Unit, China Plastics Processing Industry Association (CPPIA)
Vice Chairman Unit, Agricultural Plastics Branch, China Agricultural Plastics Application Technology Society
Member, Ageing Methods Subcommittee, National Technical Committee on Plastics (SAC/TC15/CS5)
Member, Society of the Plastics Industry (SPI), USA

Products