CLAYTONE 7840

Claytone 7840 is a rheology additive based on a self-activating organophilic phyllosilicate, and Claytone 7840 is designed for low- to medium-polar base oils in lubricant applications.
Claytone 7840 is used to create thixotropic flow behavior, improve suspension stability, reduce settling, and support gel-like structure formation in oil-based and solvent-free lubricant systems.
Claytone 7840 is typically supplied as a fine powder rheology modifier, and Claytone 7840 performance depends on base-oil polarity, dispersion quality, dosage, shear history, activation efficiency, temperature, additive package, and compatibility with greases, oils, waxes, and functional lubricant additives.

CAS Number: Mixture / organophilic phyllosilicate trade product
EC Number: Mixture / grade dependent
Molecular Formula: Organically modified natural phyllosilicate; variable
Molecular Weight: Inorganic-organic layered mineral mixture; not applicable as a single molecular compound

Synonyms: Claytone 7840, CLAYTONE 7840, CLAYTONE-7840, BYK Claytone 7840, Organophilic Phyllosilicate, Organically Modified Phyllosilicate, Organoclay Rheology Additive, Self-Activating Organoclay, Lubricant Rheology Modifier, Thixotropic Lubricant Additive, Anti-Settling Organoclay, Oil-Based Rheology Additive, Claytone 7840, CLAYTONE 7840, Claytone-7840, CLAYTONE-7840, Claytone 7840 Rheology Additive, CLAYTONE 7840 Rheology Additive, Claytone 7840 Organoclay, CLAYTONE 7840 Organoclay, Claytone 7840 Organophilic Clay, CLAYTONE 7840 Organophilic Clay, Claytone 7840 Bentonite, CLAYTONE 7840 Bentonite, Claytone 7840 Modified Bentonite, CLAYTONE 7840 Modified Bentonite, Claytone 7840 Thixotropic Agent, CLAYTONE 7840 Thixotropic Agent, Claytone 7840 Anti-Settling Agent, CLAYTONE 7840 Anti-Settling Agent, Claytone 7840 Suspension Aid, CLAYTONE 7840 Suspension Aid, Claytone 7840 Viscosity Modifier, CLAYTONE 7840 Viscosity Modifier, Claytone 7840 Thickening Agent, CLAYTONE 7840 Thickening Agent, Claytone 7840 Gelling Agent, CLAYTONE 7840 Gelling Agent, Claytone 7840 Dispersing Aid, CLAYTONE 7840 Dispersing Aid, Claytone 7840 Coating Additive, CLAYTONE 7840 Coating Additive, Claytone 7840 Paint Additive, CLAYTONE 7840 Paint Additive, Claytone 7840 Ink Additive, CLAYTONE 7840 Ink Additive, Claytone 7840 Sealant Additive, CLAYTONE 7840 Sealant Additive, Claytone 7840 Adhesive Additive, CLAYTONE 7840 Adhesive Additive, Claytone 7840 Resin Additive, CLAYTONE 7840 Resin Additive, Claytone 7840 Solvent-Based Additive, CLAYTONE 7840 Solvent-Based Additive, Claytone 7840 Industrial Grade, CLAYTONE 7840 Industrial Grade, Claytone 7840 Technical Grade, CLAYTONE 7840 Technical Grade

APPLICATIONS

Claytone 7840 is used in lubricant formulations to build thixotropic structure and improve flow control.
Claytone 7840 is incorporated into low- to medium-polar base oils where organoclay thickening and suspension behavior are required.
Claytone 7840 is used in lubricant systems where controlled viscosity recovery after shear helps maintain product stability.

Claytone 7840 is used in greases and semi-solid lubricants to support gel formation and mechanical stability.
Claytone 7840 is incorporated into specialty grease systems where non-soap thickening and oil retention are important.
Claytone 7840 is used in lubricating formulations where the structure must resist separation, bleeding, and settling during storage.

Claytone 7840 is used in oil-based dispersions to prevent solid additives, fillers, pigments, or functional particles from settling.
Claytone 7840 is incorporated into formulations containing graphite, molybdenum disulfide, PTFE, corrosion inhibitors, extreme-pressure additives, or other dispersed solids.
Claytone 7840 is used where suspension stability helps maintain uniform performance from production through final application.

Claytone 7840 is used in solvent-free and oil-rich systems where low-shear viscosity and sag control are required.
Claytone 7840 is incorporated into lubricating pastes, protective compounds, assembly lubricants, and specialty industrial oils.
Claytone 7840 is used in formulations where thixotropy improves application behavior without making the product too difficult to spread under shear.

Claytone 7840 is used as a rheological control additive in systems where conventional waxes, soaps, or polymeric thickeners may not provide the desired balance of structure and stability.
Claytone 7840 is incorporated into formulations after compatibility testing with base oils, surfactants, dispersants, corrosion inhibitors, and other additives.
Claytone 7840 is valued because Claytone 7840 provides self-activating organoclay thickening, anti-settling performance, storage stability, and thixotropic flow control in low- to medium-polar lubricant applications.

Claytone 7840 is used as a rheology additive in lubricant formulations based on low- to medium-polar base oils.
Claytone 7840 is used to generate thixotropic flow behavior in compatible lubricating systems.
Claytone 7840 is used to increase low-shear viscosity while preserving easier flow under mechanical shear.
Claytone 7840 is used to improve the structural stability of liquid and semi-solid lubricant formulations.

Claytone 7840 is used in lubricating greases to develop body and consistency.
Claytone 7840 is used to support stable grease structure during storage and application.
Claytone 7840 is used to reduce oil separation in properly formulated grease systems.
Claytone 7840 is used to improve the retention of base oil within organoclay-thickened lubricants.

Claytone 7840 is used in mineral-oil-based lubricants requiring controlled rheological behavior.
Claytone 7840 is used in synthetic base-oil systems when compatibility with low- to medium-polar media is achieved.
Claytone 7840 is used to stabilize solid lubricant particles dispersed in base oils.
Claytone 7840 is used to reduce the sedimentation of fillers and functional additives in lubricant products.

Claytone 7840 is used in industrial lubricants to improve anti-settling performance during prolonged storage.
Claytone 7840 is used to maintain more uniform additive distribution throughout lubricant containers.
Claytone 7840 is used to reduce hard sediment formation in formulations containing dense particles.
Claytone 7840 is used to improve the redispersibility of settled material in properly designed systems.

Claytone 7840 is used in open-gear lubricants to improve adhesion and film retention on metal surfaces.
Claytone 7840 is used to reduce excessive dripping or running from slowly moving mechanical components.
Claytone 7840 is used to help maintain a protective lubricant layer under static conditions.
Claytone 7840 is used to provide shear-thinning behavior during application to gears and chains.

Claytone 7840 is used in chain lubricants to improve cling and reduce lubricant loss.
Claytone 7840 is used in cable and wire-rope lubricants to support coating retention.
Claytone 7840 is used in assembly lubricants to control application thickness and placement.
Claytone 7840 is used in anti-seize compounds to suspend metallic and mineral particles.

Claytone 7840 is used in lubricating pastes to create a stable, non-flowing consistency.
Claytone 7840 is used in thread compounds to prevent filler separation during storage.
Claytone 7840 is used in maintenance pastes to improve brushability and application control.
Claytone 7840 is used in mounting compounds to support uniform distribution of solid lubricants.

Claytone 7840 is used in corrosion-protective oils to improve film retention on inclined and vertical surfaces.
Claytone 7840 is used in rust-preventive compounds to reduce runoff after application.
Claytone 7840 is used to stabilize corrosion inhibitors and suspended protective solids.
Claytone 7840 is used to support uniform protective coverage on stored metal components.

Claytone 7840 is used in metalworking lubricants to control flow and reduce settling of functional additives.
Claytone 7840 is used in forming lubricants to improve cling on dies and workpieces.
Claytone 7840 is used in drawing compounds to maintain a consistent lubricating film.
Claytone 7840 is used in stamping lubricants to improve application control and minimize dripping.

Claytone 7840 is used in specialty hydraulic or circulating lubricants when increased structure is required.
Claytone 7840 is used to improve suspension stability in lubricants containing graphite or molybdenum disulfide.
Claytone 7840 is used to maintain ceramic or mineral particles in specialty tribological fluids.
Claytone 7840 is used to reduce phase separation in compatible oil-based maintenance products.

Claytone 7840 is used in household, institutional, and industrial cleaner formulations containing compatible oil phases.
Claytone 7840 is used to control flow in solvent-containing cleaning pastes.
Claytone 7840 is used to suspend abrasive particles in nonaqueous cleaner systems.
Claytone 7840 is used to improve cling on vertical surfaces in selected industrial cleaners.

Claytone 7840 is used in formulation development to optimize viscosity, thixotropy, and anti-settling performance.
Claytone 7840 is used in manufacturing trials to determine the most effective dispersion procedure.
Claytone 7840 is used in quality control to monitor viscosity recovery and storage stability.
Claytone 7840 is used to evaluate compatibility with base oils, additives, fillers, and solid lubricants.

Claytone 7840 is used to improve production consistency in lubricants requiring repeatable rheological behavior.
Claytone 7840 is used to support stable application, storage, and service performance in organoclay-thickened systems.

DESCRIPTION

Claytone 7840 is a self-activating organophilic phyllosilicate rheology additive developed for lubricant applications in low- to medium-polar base oils.
Claytone 7840 belongs to the Claytone family of organically modified natural phyllosilicates, which BYK describes as rheology additives for solvent-borne and solvent-free systems.
Claytone 7840 works by forming a three-dimensional organoclay network in compatible oil systems, producing thixotropic flow and helping suspended materials remain uniformly distributed.

Claytone 7840 is self-activating, which means the grade is designed to disperse and build rheology without the same external polar activator requirement often associated with older organoclay grades.
Claytone 7840 mainly affects low- and medium-shear viscosity, which is important for anti-settling, oil retention, sag control, and storage stability.
Claytone 7840 should still be dispersed with adequate shear because incomplete wetting or poor delamination can reduce thickening efficiency and create specks or inconsistent rheology.

Claytone 7840 should be evaluated in the complete lubricant formulation because base-oil polarity, additive chemistry, temperature, order of addition, mixing energy, and processing time can strongly affect final viscosity and gel strength.
Claytone 7840 should be protected from moisture, contamination, and poor storage because powder flow and dispersion behavior can be affected by unsuitable handling.
Claytone 7840 should be used according to supplier recommendations, lubricant formulation requirements, workplace safety standards, and final application performance targets.

PROPERTIES

Common Name: Claytone 7840
Chemical Type: Self-activating organophilic phyllosilicate; organoclay rheology additive; lubricant thickener
Appearance: Fine off-white to light beige powder, grade dependent
Odor: Mild characteristic odor or nearly odorless
Function: Rheology modifier, thixotropic thickener, anti-settling agent, suspension stabilizer, oil-gel structuring additive
Application Range: Low- to medium-polar base oils and lubricant systems
Ionic / Surface Character: Organically modified layered mineral, grade dependent
Solubility: Insoluble in water and oils; dispersible and swellable in compatible organic/oil systems
Activation Behavior: Self-activating grade, designed for easier rheology development in suitable systems
Shear Response: Builds thixotropic flow behavior and low-shear structure in compatible formulations
Compatibility: Low- to medium-polar base oils, lubricants, greases, pastes, and oil-based industrial systems, formulation dependent
Thermal Stability: Grade and formulation dependent; avoid excessive heat and decomposition conditions
Moisture Sensitivity: Powder handling and dispersion may be affected by moisture exposure
Stability: Stable under recommended dry storage; protect from moisture, contamination, and excessive heat
Storage Temperature: 15–30°C, tightly closed, dry, well-ventilated
Shelf Life: Typically 24–60 months in original sealed packaging, supplier dependent

FIRST AID

Inhalation:
Move to fresh air if powder dust is inhaled.
Seek medical attention if coughing, respiratory irritation, or breathing discomfort persists.
Avoid breathing dust during weighing, charging, blending, and powder transfer operations.

Skin Contact:
Wash skin with soap and water after contact.
Remove contaminated clothing if necessary and wash before reuse.
Seek medical advice if irritation, redness, dryness, or prolonged discomfort develops.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation, redness, or foreign-body sensation persists.

Ingestion:
Rinse mouth with water.
Do not induce vomiting.
Seek medical attention if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
Monitor for mechanical irritation from mineral powder dust and possible irritation from organic treatment components.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves, safety glasses, protective clothing, and dust protection where bulk powder exposure may occur.
Avoid generating dust during bag opening, transfer, weighing, charging, mixing, and packaging operations.
Use clean, dry equipment and controlled addition procedures to maintain consistent dispersion and rheology performance.

Ventilation:
Use general ventilation for normal handling.
Use local exhaust ventilation where dust may be generated during powder processing.
Avoid inhalation exposure during bulk transfer, high-speed mixing, and charging into oil systems.

Storage:
Store in tightly closed bags or containers in a cool, dry, well-ventilated area.
Protect from moisture, direct sunlight, contamination, excessive heat, and physical compaction.
Keep away from strong oxidizers, strong acids, strong bases, and incompatible reactive chemicals.

Spill and Leak Procedures:
Avoid dust generation and restrict access to trained personnel.
Collect spilled powder using vacuum or careful sweeping methods.
Dispose of waste according to local regulations and prevent release to drains, soil, and waterways.

Handling Precautions:
Optimize dispersion because Claytone 7840 thickening efficiency, anti-settling performance, and thixotropic recovery depend strongly on wetting, shear, and processing sequence.
Confirm base-oil compatibility because Claytone 7840 is designed for low- to medium-polar lubricant systems and may perform differently in highly polar or very nonpolar media.
Rotate stock using FIFO practices to maintain consistent powder flow, moisture level, dispersion behavior, and rheological performance.