Stabaxol® I Powder

Stabaxol® I Powder is normally dissolved in the polyester polyol; alternatively, it may be added to the pre-polymer (only with terminal OH groups). An addition of 2.5 part by weight Stabaxol® I Powder to 100 parts by weight polyester polyol will increase the resistance to hydrolysis approximately four times. As Stabaxol® I Powder tends to bloom in certain goods, the addition should not exceed 2 parts by weight (on 100 parts polyester polyol).

Tensile Strength after Hydrolysis
PET monofilaments in saturated vapor at 120°C

Prior tests should always be carried out to determine the most suitable dosage, however. To be most effective, Stabaxol® I Powder should be added to the polyester polyol during the warming-up period, starting at a minimum temperature of 50 °C (122 °F), to a maximum temperature of 120 °C (248 °F). As Stabaxol® I Powder does not disperse readily (it may float undissolved on the surface), it should be stirred intensively. Stabaxol® I Powder may slightly accelerate the crosslinking reaction (polyester polyol/iscoyanate). This can be counteracted by adding a very small amount of an organic acid (e.g. citric acid). For adhesives we recommend to add 1-2 parts by weight Stabaxol® I Powder to 100 parts by weight adhesive.

Stabaxol® I Powder can be stored for at least 24 month under cool, dry conditions. The powder tends to form lumps, especially towards the end of the storage period.