BENTONE 34 (Anti- Settling Agent)

Description

APPLICATIONS:

– Adhesives
– Anti-corrosive paints
– Automotive finishes
– Bituminous compositions
– Buffing compounds
– Coil coating systems
– Dip coatings
– Finishes for household appliances
– Greases
– High-build systems
– Industrial finishes
– Interior and exterior house paints
– Knifing fillers
– Mould release agents
– Paint stripper pastes
– Plastisols
– Primers, undercoats, fillers
– Printing inks
– Putty and caulking compounds
– Refinishes for household appliances
– Road marking paints
– Underbody sealants and sound-absorbing compounds

– Wood preservatives and finishing systems
– Waxes
– Wood preservatives and finishing systems

KEY PROPERTIES
Advantages of BENTONE 34:

– increases viscosity
– provides thixotropy
– prevents pigment settling during storage
– improves flow and leveling
– controls sagging on vertical surfaces and
– penetration on porous substrates
– prevents syneresis in thixotropic systems

INCORPORATION
General

Incorporation of BENTONE 34 in organic systems (e.g. paints) requires high-shear dispersion equipment and a chemical activator

Two basic incorporation methods can be used:

1. Addition of BENTONE 34 as a dry powder for in-situ dispersion and activation
The BENTONE 34 powder is added directly to the resin/solvent blend and is thoroughly mixed
for 10 minutes. A chemical activator (see below) should be added next and mixed for 10 minutes. The pigments and fillers are then added and dispersed with high shear for at least 15 minutes.

2. Addition of BENTONE 34 as pregel of 5% – 10% by weight
The solvent is charged to the mixing tank. BENTONE 34 powder is added and dispersed under high shear. A chemical activator can then be introduced to optimize gelation (see below). For incorporation in the full formulation the pregel is added to the resin/solvent mixture with stirring. Pigments and fillers are then incorporated and dispersed under high shear.

Suitable dispersion equipment

High-speed disc impellers (Cowles dissolver); Ultra-Turrax, pearl-, sand-, ball- and three-roll mills.

Chemical activators

Recommended to ensure full activation, i.e. optimum efficiency of BENTONE 34.

– Methanol/H2O
– Propylene carbonate
– Propylene carbonate/ H2O
– Ethanol/ H2O
– Acetone/ H2O

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