IRGASTAB® PUR 67 is a novel liquid heat stabilizer blend for polyether- and poly-ester-based flexible foams. It is a BHT free blend containing a low amount of aminic antioxidant.

IRGASTAB PUR 67 is particularly suitable for the stabilization of polyols used for the manufacture of PUR flexible foams. IRGASTAB PUR 67 can also be added with additional antioxidants and/or costabilizers (e. g. phosphites) and/or light stabilizers (e. g. HALS, UVA).

Features & Benefits

• Good resistance to scorch, fogging, and textile staining
• Outstanding resistance to foam discoloration after gas and/or light exposure
• Pourable liquid allowing dust free handling, automatic dosage and shortening of mixing time
• Increases productivity by reducing weighing and metering to one single operation

Properties

Appearance ……………………..light yellow liquid product
Viscosity (40 °C)……………… 200 – 300 mm²/s
Vapor pressure (20 °C) ……. < 3 kPa
Relative density (20 °C) …… 0.95 – 1.00
Water solubility (20 °C)……. g/100 g solution

Dosage:

• In slabstock polyol applications, the concentration of IRGASTAB 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 IRGASTAB PUR 67 are recommended.

Additional performance data in polyols are available upon request.