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K-SPERSE A503 is a polymeric dispersant designed for use in solvent based coatings, inks and pigment concentrates. It is supplied at 40% active in butyl acetate.

Lower pigment paste viscosity
High pigment loading
Does not require a synergist
Excellent color development and high gloss
Better clarity of transparent pigments
Improved jetness and viscosity stability of carbon black dispersions
Little or no effect on the cure of amino resins or isocyanates
Compatible with a wide variety of resin systems

Appearance:                            Clear, yellow liquid 
% Active:                                  40
Specific gravity, 25°C:              0.94    
Volatile:                                    Butyl acetate

K-SPERSE A503 is recommended for organic and inorganic pigments in a wide variety of solvent based resins, including alkyds, acrylics, polyesters, polyurethanes and aldehydes. It is especially effective for pigments with high surface areas, such as high color carbon blacks, phthalocyanine blue and quinacridone and perylene reds.

For high color carbon black:
Weight % dispersant on pigment weight = pigment surface area(m2/g) x 0.36
For other pigments:
Weight % dispersant on pigment weight = pigment surface area(m2/g) x 0.83
It is strongly recommended that a ladder study be run, since the optimum level of dispersant depends on the type of pigment, resin and solvent used in each specific formulation

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