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Tiangang® BW-10LD (HS-622)

Oligomeric Hindered Amine light stabilizer (HALS)

Chemical name Butanedioic acid, dimethylester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol
CAS number 65447-77-0
Description Tiangang® BW-10LD (622) is a highly effective radical scavenger belonging to the Hindered Amine Light Stabilizers (HALS) family of stabilizers. It is a polymeric HALS with low melting range, which is very suitable for use in polypropylene, polyethylene, polyurethane, metaformaldehyde, polyamine and polyester. Tiangang® BW-10LD typically demonstrates reduced interaction with co-additives such as pigments or other stabilizers and is an excellent stabilizer for systems containing high loadings of carbon black.

Typical properties

Tiangang® BW-10LD Appearance Bulk density, kg/m3 Molecular weight Specific gravity, g/ml@ 35oC Melting range, oC Flash point, oC
Off-white solid 570 >2500 1.22 55~70 >250

Thermogravimetric analyses (TGA) (10 mg@10oC/minute under N2)

Tiangang® BW-10LD Temperature 250oC 300oC 325oC
Weight loss <1.0% <3.1% <8.4%

Solubility @ 20oC (g/100 ml solvent)

Tiangang® BW-10LD Water Acetone Methyl alcohol Xylene Ethyl acetate Hexane Toluene Methylene chloride
0.01 2 0.1 8 5 0.01 18 >67

Safety & handling

Tiangang® BW-10LD The 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.


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.