DISPERBYK® 140

• DISPERBYK® 140 displays excellent compatibility with all common paint binders.
• As a special note, for nitrocellulose (NC) and thermoplastic acrylics (TPA), DISPERBYK-140 displays superb compatibility.

• These high molecular weight additives deflocculate pigments through steric stabilization of the pigments.
• They provide equal electrical charge to pigments and thus avoid additionally possible co-flocculation of pigments that are not equally charged.
• Due to the small particle sizes of the deflocculated pigments, high gloss is achieved and color strength improved.
• Additionally, transparency of transparent pigments and hiding power of opaque pigments are increased.
• These products reduce viscosity, subsequently, leveling is improved and higher pigment loading is possible.

Coatings Industry
Special Features and Benefits
The additive deflocculates pigments by steric stabilization. As a result of the small particle sizes of the deflocculated pigments, high levels of gloss can be achieved and the color strength is improved. In addition, the additive increases transparency with transparent pigments and hiding power with opaque pigments. Viscosity is reduced. In this way, the leveling properties are also improved and higher pigment loading is possible.
Recommended Use
DISPERBYK-140 is highly compatible with all standard coating binders. The use of DISPERBYK-140 to excellent effect in cellulose nitrate (CN) and thermoplastic acrylate resins (TPA) is a particular benefit.

Recommended Levels
Amount of additive (as supplied) based upon pigment:
Inorganic pigments: 15-20%
Titanium dioxides: 3-4%
Organic pigments: 30-80%
Carbon blacks: 40-80%
The above recommended levels can be used for orientation. Optimal levels are determined through a series of laboratory tests.
Incorporation and Processing Instructions
For optimum performance, the additive must be incorporated into the mill base before the addition of pigments.

• The above recommended use levels are strongly dependent on pigment particle size.
• Optimal levels may be determined with a ladder series in the laboratory.

• In baking enamels, DISPERBYK® 140 might have an influence on the paint adhesion on steel substrates.
• Before usage in white baking enamels, DISPERBYK® 140 should be checked for possible yellowing influence.
• If yellowing occurs, DISPERBYK® 180 (see data sheet W208) is recommended to stabilize titanium dioxide.

Solution of polymeric phosphoric acid ester alkyl ammonium salt

DISPERBYK-140 may adversely affect the coating adhesion to steel substrates in baking enamel systems. Before using in white baking enamel systems, check whether DISPERBYK-140 causes yellowing. In this case DISPERBYK-180 is recommended to stabilize titanium dioxide.