Exolit AP 423
Ammonium polyphosphate
Clariant
阻燃剂 >> 磷型
Flame retardant / Fire retardant >> Phosphorus based
木器 &家具涂层
Wood & Furniture Coatings
塑料涂层
Plastic coating
Largely insoluble in water
Insoluble in organic solvents
Exolit AP 423 is a fine-particle ammonium polyphosphate produced by a special method. The product is largely insoluble in water and completely insoluble in organic solvents. It is colourless, non-hygroscopic and non-flammable. Exolit AP 423 differs from most other commercial products in the following ways:
greatly reduced solubility in water
lower viscosity in aqueous suspensions
lower viscosity in PU polyol suspensions
very low acid number
Intumescent coatings
On account of its low water solubility, Exolit AP 423 is particularly suitable as an "acid donor" for intumescent coatings. Other essential components of intumescent systems include a binder (in the case of emulsion paints, e.g. Mowilith grades from Clariant GmbH), a carbon donor (e.g. pentaerythritol) and a blowing agent (e.g. melamine).
On exposure to flame, intumescent coatings form a carbonaceous foam which effectively shields the underlying material from temperature increases.
Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in DIN 4102.
The application of Exolit AP 423-based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B1 (DIN 4102).
Colourless, non-hygroscopic and non-flammable fine-particle ammonium polyphosphate. Used as an "acid donor" for intumescent coatings on wood or plastics. Offers low viscosity in aqueous suspensions, low viscosity in PU polyol suspensions and very low acid number.