CP-40 Organoclay | Solvent-Based Coatings, Grease & Adhesives

Q: What is CP-40 organoclay used for?

CP-40 is a rheological additive for solvent-based formulations. Listed applications include transparent, alkyd and polyester coatings, lubricating grease, printing inks, sealants, adhesives and diesel-based drilling fluids. It supports thixotropy, particle suspension and sag resistance.

Q: What is the typical CP-40 dosage?

The typical addition level is 0.2–2.0% by weight of the formulation. The appropriate amount depends on the solvent, binder, solids, target rheology and application. Establish the final dosage by testing the complete formulation.

Q: Does CP-40 require a polar activator?

CP-40 is a conventional organoclay grade. For best efficiency, the supplied guidance recommends 95% ethanol or 95% methanol at 30–40% of the CP-40 weight. Confirm the activator and level for the actual formulation.

Q: How should CP-40 be stored and what packaging is available?

Store CP-40 in a dry, well-ventilated area at 0–30°C and keep the package closed. The stated quality-guarantee period is 24 months under recommended storage conditions. Packaging options include kraft bags, kraft bags with a PE inner liner, 25 kg, 50 lb and 600 kg bags, subject to confirmation.

Q: What is the CP-40 delivery lead time?

The indicative lead time is 7–10 days after receipt of deposit. Confirm the current schedule against order quantity, packaging, production and shipping arrangements.

CP-40 is a dedicated product grade, separate from CP-34. It is an organic derivative of montmorillonite clay supplied as a fine white powder for solvent-based systems. Use the grade-specific properties and processing guidance below, and request the current CP-40 TDS and batch COA when qualifying material for production.

For formulation review, send our technical team your solvent or base oil, resin or binder, pigment and filler loading, and target flow or sag behavior. Request the latest CP-40 TDS, SDS, COA or a sample.

CP-40 at a Glance

Buyer question	CP-40 information
Product type	Organoclay rheological additive; organic derivative of montmorillonite clay
System	Solvent-based organic liquids
Polarity range	Low to intermediate
Activation	Conventional grade; polar activator recommended for best efficiency
Typical dosage	0.2–2.0% by weight of the formulation
Listed applications	Coatings, grease, inks, adhesives, sealants and diesel-based drilling fluids

Typical Technical Properties

Property	Typical value	Test condition
Composition	Organic derivative of montmorillonite clay	—
Appearance	Fine white powder	Visual
Moisture content	≤3.5%	105°C, 2 h
Loss on ignition	<32.2%	1000°C
Bulk density	0.53 g/cm³	—
Fineness	≥98% passing 200 mesh	200 mesh

Values are typical product information for screening. Obtain the current grade-specific TDS and lot COA for the specification applicable to the shipment.

What CP-40 Does in a Formulation

When dispersed and activated in a compatible organic liquid, CP-40 can develop a thixotropic structure. This structure helps increase low-shear viscosity and suspend solid particles at rest, while allowing the material to flow under application shear. Its recovery after shear supports anti-settling and sag resistance without being intended to eliminate flow and leveling.

Particle suspension: helps reduce settling of pigments and fillers; verify sediment remains manageable in the complete formulation.
Thixotropy and sag resistance: supports structure at rest and flow during application.
Appearance-sensitive systems: CP-40 is described as forming a high-clarity gel; verify haze and color in the finished binder.
Film reinforcement: contributes a reinforcing clay platelet network in organic binder systems; assess performance in the finished product.

Applications for CP-40

Application	Potential formulation role	What to validate
Solvent-borne paints and coatings	Thixotropy, pigment suspension and sag resistance	Settling, film build, flow and leveling; haze and color for transparent coatings
Lubricating grease	Rheology and consistency contribution	Base-oil compatibility, process, target consistency and stability
Adhesives and sealants	Thixotropy, filler suspension and sag resistance	Resin compatibility, extrusion, vertical sag and cured performance
Printing inks	Body and particle suspension	Vehicle compatibility, print transfer and appearance
Diesel-based drilling fluids	Rheology and suspension contribution	Base-fluid compatibility and the relevant mud test method

CP-40 may also be evaluated as an alternative to fumed silica in selected solvent-borne formulations. This is a formulation-specific comparison, not a universal one-for-one replacement. Compare dispersion, rheology, appearance and end-use performance in laboratory trials.

Dosage, Activation and Dispersion

The typical CP-40 addition level is 0.2–2.0% by weight of the formulation. Select the final level from laboratory trials using the actual solvent, binder, pigments or fillers, and application method. The stated range is not a grease- or drilling-fluid-specific dosage recommendation.

CP-40 is a conventional grade. For best efficiency, the supplied guidance recommends 95% ethanol or 95% methanol at 30–40% of CP-40 weight. Confirm the suitable activator and level for the specific solvent and binder system.

High-Shear Pre-Gel Procedure

Charge the selected solvent to the mill or dispersing vessel.
Under agitation, slowly add CP-40 at 8–10% of the total pre-gel weight.
Mix at high speed for 5 minutes.
Add the selected polar activator at the level established for the formulation.
Mix at high speed for a further 5 minutes, then check gel development and uniformity.
Add the pre-gel to the main batch and adjust based on application testing.

Heating is not required to obtain good dispersion. Add powder gradually to reduce agglomeration. Set the final mixing speed, sequence and dosage using the actual formulation and production equipment. For background, see how organoclay builds a thixotropic structure.

Packaging, Storage and Delivery

Item	Details
Packaging	Kraft bag or kraft bag with PE inner liner; 25 kg, 50 lb or 600 kg bags; customized options subject to confirmation
Indicative container loading	20 FCL: 15 MT with pallets or 18 MT without pallets; 40 FCL: 25.2 MT with pallets. Confirm final quantity for the selected packaging and pallet plan.
Storage	Dry, well-ventilated area at 0–30°C; keep package closed
Quality-guarantee period	24 months under recommended storage conditions; check the production date and batch documents
Indicative delivery lead time	7–10 days after deposit receipt; confirm current schedule against order and production details

CP-40 Grade Selection

Choose CP-40 when your formulation is solvent-based and falls in the low- to intermediate-polarity range, and when a conventional grade with an external polar activator fits your process. CP-40 and CP-34 are separate grades; compare their current grade-specific TDS against your formulation rather than treating them as aliases or direct substitutes. If your system is more polar or you prefer a self-activating grade, review CP-APA and confirm fit with technical support.

Browse the complete organoclay product range, compare the solvent-based organoclay grades, or use the Product Finder.

Frequently Asked Questions

What is CP-40 organoclay used for?

CP-40 is a rheological additive for solvent-based formulations. Listed applications include transparent, alkyd and polyester coatings, lubricating grease, printing inks, sealants, adhesives and diesel-based drilling fluids. It supports thixotropy, particle suspension and sag resistance.

What is the typical CP-40 dosage?

The typical addition level is 0.2–2.0% by weight of the formulation. The final amount depends on the solvent, binder, solids, target rheology and application. Establish dosage by testing the complete formulation.

Does CP-40 require a polar activator?

CP-40 is a conventional grade. For best efficiency, the supplied guidance recommends 95% ethanol or 95% methanol at 30–40% of CP-40 weight. Confirm the type and amount for the actual solvent and binder system.

Can CP-40 replace fumed silica?

CP-40 can be evaluated as an alternative rheology modifier in selected solvent-borne systems. It is not a universal one-for-one replacement; compare dispersion, rheology, appearance and end-use performance in the full formulation.

How should CP-40 be stored and what packaging is available?

Store CP-40 in a dry, well-ventilated area at 0–30°C and keep the package closed. The stated quality-guarantee period is 24 months under recommended conditions. Packaging options include kraft bags, kraft bags with a PE inner liner, 25 kg, 50 lb and 600 kg bags, subject to confirmation.

What is the CP-40 delivery lead time?