Bentonite clay for foundry | Camp Shinning Organoclay

Bentonite clay for foundry is in-organic treated bentonite clay which is utilized in foundry to bind the sand grains into desired shapes.
Bentonite clay helps in retaining the mechanical shape of the mould by making the particles of sands adhere to it and also making the surface impermeable. Strength and fusion point are the two important properties desired for selecting bentonite. Primary use is in the production of non-ferrous castings. Mixing ratio depends on the sand fineness and its quality, impurities, clay particles and fineness of sand will affect the Green strength properties.

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Properties

Composition                      Organic derivative of a montmorillonite clay

Appearance                       Fine powder, white

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

Loss on ignition (1000℃)            40%-44%

Bulk density                       0.40~0.60g/cm3

Fineness (<74μm, %)               ≥99.8%

Dispersion fineness (μm)            ≤10

Advantages

• High purity, low silica content.
• Easy dispersing, fine particle size.Easy to use, no need to pregel
• High viscosity and high thixotropic.
• Wide application range. It can be applied in almost all resins and solvents
• Gel is very transparent and of light color.

Application

Oilfield chemicals Organophilic clay are used in the following applications:

• Paints including top grades paint, decorative paint, industrial paint, traffic paint etc.
• Inks
• Sealant
• Cosmetic
• Cleaning agent
• Oil Drilling Mud
• Fracture Fluids
•  

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 gel has a shelf life of 2 years, and should be stored in ventilated cool and dry place.

Notice

The information on use is based on data which are believed reliable, but any recommendation or suggestion made is without guarantee or warranty, since the conditions of use are outside our control. All products are sold on the conditions that purchasers shall make their own tests to determine the suitability of such products for their purpose and that all risks are assumed by user. We disclaim any responsibility for damages resulting from careless or improper handling or use. Nothing herein is to be taken as permission, inducement or recommendation to practice any patented invention without a license.

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How To Use Thixotropic clay

1. Pre-gel method
2. Polar activator is not necessary:
3. Main solvent xylene: 95~92%
4. Thixotropic clay :5~8%
5. Dispersing 5-15min, gel is finished.
6. Polar activator is necessary:
7. In aromatic solvent, the recommend activator is methyl acohol/water (95%/5%)/ acolhol/water (95%/5%), the dosage is 33%-45% based on the weight of CP-720B.
8. In mineral oil (such as 200#), white oil, diesel oil, the recommend activator is methyl acohol/water (95%/5%)/acolhol/water(95%/5%), the dosage is 33%-60% based on the weight of CP-720B.
9. Procedure of adding gel:
10. Charge solvent and resin to mill
11. Slowly add the gel
12. Dispersing 5-10min
13. Wetting agent (if required)
14. Disperse completely to desired fineness
15. Dilute to desired viscosity
16. Add directly with powder
17. Charge solvent and resin
18. Add Thixotropic clay slowly
19. Disperse 10-15min

D .Add polar activator (if necessary)

1. Disperse 10-15min at high speed
2. Add wetting agent and other additive
3. G.Grind and next procedure

It can be added directly in powder under high shear condition. The addition is recommended to be before grinding procedure to get the best effectiveness. Addition level is commonly 0.1%~2.0%. If add polar activator and make pre-gel, better efficiency can be achieved.

Bentonite clay for foundry