Professional Guide: Preparation and Formulation of Organoclay Pre-gels

In the production of paints, inks, and lubricants, the efficiency of organoclay rheological additives depends heavily on the quality of the pre-gel preparation. Using the correct dosage and high-shear dispersion ensures optimal thickening, anti-settling, and thixotropic properties.

This guide outlines the precise formulations and standardized preparation steps for the BT series of organoclays.

BT Series Pre-gel Formulation Table

Model	Dosage of Dry Powder	Dosage of Solvent	Dosage of Polar Activator
BT-184	6-10	Xylene: 88-92Mineral Spirits 200#: 86-90	Methanol/Water (95/5): 3-5 or Ethanol/Water (95/5): 2-4
BT-185	10	Xylene: 86-87	Methanol/Water (95/5): 4 or Ethanol/Water (95/5): 3
BT-186，BT-871	10	Xylene: n-Butanol (4:1 mixture) = 86-87	Methanol/Water (95/5): 4 or Ethanol/Water (95/5): 3
BT-381, BT-383, BT-382, BT-182, BT-384,  BT-581, BEZ-300	10	Xylene: 90	Activator Not Required

Standardized Preparation Process

To achieve full exfoliation of the organoclay silicate layers, the following addition order and mixing times must be strictly followed:

Step 1: Solvent Preparation
Material: Add the solvent or mixed solvent system (e.g., Xylene or 200# Solvent Oil).

Process: Mix thoroughly.

Step 2: Clay Dispersion
Material: Add the BT Series Organoclay dry powder.

Process: High-speed stirring for 5–10 minutes.

Goal: Ensure the clay particles are fully wetted and pre-dispersed before activation.

Step 3: Polar Activation
Material: Add the designated Polar Activator (if required by the model).

Process: High-speed stirring for 15–20 minutes.

Goal: Chemical activation triggers the formation of a thixotropic gel network.

Important Technical Tips for Best Results

Polar Activator Efficiency: For maximum performance, always use a mixture of Methanol/Water or Ethanol/Water at a 95/5 ratio. The presence of 5% water is essential to bridge the hydrogen bonds between clay platelets, ensuring full gel structure formation.

The Role of High-Shear: Pre-gel preparation is a mechanical process. Using a high-speed disperser is critical to provide the required energy to “exfoliate” or open the clay stacks for maximum thickening efficiency.

Process Optimization: If your system is sensitive to polar solvents, we recommend our Self-activating models (such as BT-381 or BEZ-300). These streamline production by eliminating the need for separate activators and reducing the risk of solvent incompatibility.