# How to Use CP-98 Organoclay Rheology Additive in Solvent-Based Coatings | Camp-Shinning

Proper dispersion and activation are critical to achieving the best rheology performance from organoclay additives. Camp-Shinning CP-98 is designed for low to medium polarity solvent-based coatings and can improve sag resistance, leveling, pigment suspension, and storage stability when used with the right process.

## Step 1: Select the Right Application Target
CP-98 is commonly used to improve:
– Sag resistance and vertical film hold
– Flow and leveling for smoother appearance
– Anti-settling stability for pigments and fillers
– Flooding and floating control for shade uniformity

## Step 2: Plan a Starting Dosage Range
Dosage depends on:
– Solvent polarity and resin type
– Pigment volume concentration and filler loading
– Target viscosity profile across shear rates
– Application method (spray, brush, roller)

## Step 3: Dispersion Method
To develop consistent structure:
– Use sufficient shear during dispersion
– Add CP-98 in a controlled sequence to avoid clumping
– Maintain consistent mixing time and temperature
– Ensure complete wetting in the solvent phase before final letdown

## Step 4: Activation and Optimization
– Confirm activation approach suitable for the solvent blend
– Adjust dosage to balance sag resistance and leveling
– Validate clarity for transparent coatings
– Monitor storage stability and re-dispersibility after aging

## Step 5: Performance Testing Checklist
– Viscosity measurements at multiple shear rates
– Sag resistance and leveling drawdowns
– Pigment settling and re-stirring evaluation
– Flooding and floating assessment for colored systems

## FAQ

### What is the most common reason organoclay does not work well?
Incomplete dispersion is the most common cause, leading to weak structure development and unstable performance.

### Can CP-98 be used for clear coatings?
Yes. It supports light color gels and high transparency when properly dispersed in compatible solvent systems.

### Does CP-98 work better in aromatic solvents?
It is designed for low to medium polarity systems and performs well in many aromatic and mixed solvent blends.

### Should I test viscosity at one shear rate only?
No. Testing across shear rates gives a more accurate view of structure, application behavior, and stability.

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