Irgastab AO PUR 67


PUR 67 is a novel liquid heat stabilizer blend for polyether and polyester-based flexible foams. It is a BHT-free blend containing a low amount of aminic antioxidants. used to replace BASF Irgastab PUR 67.



PUR 67 is particularly suitable for the stabilization of polyols used for the manufacturer of PUR flexible foams. PUR 67 can also be added with additional antioxidant stabilizers (e.g. phosphites) and/or light stabilizers (e.g. HALS, UVA). PUR 67 exhibits good resistance to scorch, fogging, and textile staining. It particularly confers outstanding resistance to foam discoloration after gas and/or light exposure. In slabstock polyol applications, the concentration of PUR 67 ranges between 0.4% and 0.45% depending on the degree of stabilization desired. In molding polyol grades, levels of 0.05% to 0.1% of PUR 67 are recommended.

Chemical Name:



BHT-free blend
Better performance than antioxidant 1135 or BHT or 5057 single or used together.


Appearance light yellow liquid
Viscosity (40 °C) 200~300 mm 2 /s
Vapor pressure (20 °C) <3 E~3 Pa
Relative density (20 °C) 0.95~1.00
Solubility in water(20 °C < 0.1g/100 g

Handling and Safety: 

For additional handling and toxicological information, please consult us for Maternal Safety Date Sheet.


25 or 200kgs per drum.