Rheological Additive for Solvent Base System
CP-200 is an organic derivative of bentonite clay act as Rheological additive in low to high polarity systems. Such as Ketones, Glycol, Alcohol, Esters and Ethers, includes Polar System with some Aromatic Solvents.
Properties & Markets
Paints & Coatings : A small addition of ORGANOCLAY can greatly enhance the rheological properties of the paint system. These properties prevent pigment settling and sagging on vertical surface to ensure the proper thickness of the coating is applied. They also ensure good leveling for the removal of brush marks.
Storage stability is guaranteed even with high temperatures. ORGANOCLAY confer water resistance and structure reinforcement with no adverse effect on adhesion and solvent relese. Gloss is minimally affected due to the low levels of addition. ALL ORGANOCLAY are used widely in a vast range of solvent based paint systems
Architectural Paints : Undercoats, Primers, Semi-Gloss, Gloss and Wood Stains
Industrial Coatings : Air Drying, Stoving Enamels, Epoxies, Esters, Urethanes, Vinyls, Acrylics, Anti-Corrosive, Automotive, Bitumionous, Coil, Road Marking, Underbody Car Coatings, Nitro Cellulose and Chlorinated Rubber.
Printing Inks : With the correct ORGANOCLAY, is possible to adjust the consistency of printing inks to the desired values, avoiding pigment sedimentation, providing good color distribution obtaining desired film thickness, reduction in misting, control of track, water pick up and dot gain control. ORGANOCLAY are used in much letterpress, lithographic and offset ink.
Lubricating Greases : Thickening lubricating oils with ORGANOCLAY can produce specialty high temperature resistant lubricating greases. ORGANOCLAY also gives good working stability and water resistance to the greases. Such greases are typically used for lubrication in foundries, mills and on high speed conveyors. Other greases can be manufactured for other industries such as agriculture, aviation, automotive and mining.
Cosmetics : The performance of cosmetics is enhanced by the use of ORGANOCLAY and they allow good colour retention and coverage for nail lacquers, lipsticks and eye shadows. They have been tested to be non-irritant for both skin and eye contact.
Food Contact Applications : ORGANOCLAY are used as thixotropic agents in coatings that come into contact with food. They are also used as fillers in plastic food containers. They are acceptable under current EEC legislation on food contact additives.
Drilling Fluids : ORGANOCLAY are used extensively in drilling fluids throughout the world. They are used to suspend the heavy sealing agents, normally barytes and carry the cuttings back to the surface. They also play an important part in lubricating the drill. ORGANOCLAY can also be used as fracfluids, where the gelling ability of them is used to seal rock fractures in the bore hole.
Nanofiller for Plastic : Highly purified organoclays because of their particle size and chemical structure have the unique ability to be able to function in a wide range of monomers and polymers. The resulting properties of polymers, compounded with these unique organoclays include :
- Increased Modular Strength without Sacrificing Impact Resistance
- Improved Gas Barrier Properties
- Increased Solvent and Heat Resistance
- Improved Fire Retarding Properties
The combination of these improved properties, convenient processing and relative low costs, makes nano composites a tremendous commercial opportunity as they are superior alternatives to the current fillers used in polymer systems.
Hectorite and Bentonite based organoclay grades
Optimum activation of organoclays by ideal organoclay for highest effectivity
Correct activation for highest efficiency
❖ Optimum shear applied for proper delamination
❖ Correct use of polar activator for conventional grades
❖ Right order of addition for best processing result
organoclays can be optimized by improved process parameters including a review of the process temperature.
However, temperature control during organoclay dispersion in solvent based systems is not as important as with e.g.
organic thixotropes.
Various methods used in manufacturing formulations and procedures sometimes suffer in efficiency when order of addition and mixing conditions are less than optimum.Further, the effects of solvent resin temperature on process development and final results will be discussed.
organoclay materials are based on either
bentonite or Hectorite, both minerals from the smectite group. They consist of microfine platelet stacks that, due to their mineralogical structure, expand in water in their natural form. In order to make them compatible with non-aqueous media such as organic solvents, however, it is necessary to modify the surface of their silicate plates with quaternary ammonium compounds.
The choice of this modification and processing conditions also plays an important role in the practical applicability and performance capabilities of the finished end systems. The resulting organoclay will be dried and milled to achieve a powdered material.
To be most rheologically effective, the size of the individual platelets and the total combined edge length following their successful activation is decisive.
the Hectorite platelets are significantly smaller than the bentonite ones, the resulting edge length per gram of silicate in the Hectorite is much larger.
This makes Hectorite additives able to build up a much denser and more rheologically effective network. In order to be activated, organoclays must first be exposed to high shear forces over a defined swelling period.