Thixotropic agent

Thixotropic agent CP-257 is a new style of organo clay rheological additive made from bentonite. The thixotropic additive is used in solvent and resin systems covering low polarity to high polarity range.

Properties

Composition                      Organic derivative of a montmorillonite clay

Appearance                       Fine powder, light yellow

Moisture content (105℃,2hr)         ≤3.5%

Loss on ignition (1000℃)            40%-45%

Bulk density                       0.40~0.60g/cm3

Fineness (<74μm, %)               ≥98%

Dispersion fineness (μm)            ≤8

Advantages

• High purity, low silica content
• Fine dispersion and particle size
• Good self-activated property. It can eliminate polar activator
• Wide application range including low polarity to high polarity systems

Application

Thixotropic agent  CP-257 is used in the following applications:

• Paints including top grades paint, decorative paint, industrial paint
• Grease, especially recommended in greases based on synthetic oils such as vegetable oil and polyester oil etc。
• Inks
• Cosmetic
• Sealants and adhesive

Using

Thixotropic agent can be added directly in powder under high shear condition. Addition level is commonly 0.1%~1.0% (7%-10% in greases) of total formulation by weight. In low and medium polarity solvents, polar activator is required to achieve better performance.

The addition procedure is suggested as below.

1. Add resin in solvent.
2. Add CP-257 under slow agitation.
3. Disperse under high speed for 10-15 minutes.
4. Add polar activator (95% ethanol or 95% acetone)
5. Disperse under high speed for 10-15 minutes.
6. Add wetting agent and other additive.
7. Grinding and next procedure.

If to make pre-gel, better efficiency can be achieved. Addition level in pre-gel is 8%-10% of total pre-gel in weight.

Pre-gel procedure is as below.

1. Add solvent or solvent mixture.
2. Add Thixotropic agent  CP-257  under slow agitation.
3. Disperse under high speed for 5-10 minutes.
4. Add polar activator.
5. Disperse under high speed for 10-15 minutes.

Polar activator is suggested to be ethanol/water (95/5)or acetone/water (95/5). Dosage of polar activator is about 10%-35% of CP-257 by weight.

Note: The suggested addition level of our organoclay and polar activator is based on our lab testing. Exact dosage for detail formulation should be based on user’s testing.

Safety

All safety information is provided in the Material Safety Data Sheets for Zhejiang Camp-Shinning New Material Co.,Ltd..

Package

Kraft paper bag with PE liner or multi-wall paper sacks or customized. 25kg/bag or 22.68kg/bag or customized

Storage

Thixotropic agent CP-257 has a shelf life of 2 years, and should be stored in ventilated cool and dry place. 

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