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ACUMER® MINING POLYMERS

ACUMER® 9300 Dispersant Polymer for Mineral Slurries CHARACTERISTICS (These figures are typical values and should not be considered as specifications). Aspect

clear solution*

Chemical nature

acrylic homopolymer

Grade

sodium salt

Average molecular weight

4500 (Mw) 3000 (Mn)

Total solids (%)

~45

pH as is (at 25°C)

~7

Bulk density (at 25°C)

~1.32

Viscosity Brookfield (mPa.s at 25°C)

~600

*A slight haze may appear, this does not affect the intrinsic properties of the product or its performance.

- Calcium carbonate - Kaolin clay - Titanium dioxide - Talcum - Aluminium hydroxide... STORAGE RECOMMENDATION Freezing or long term cold storage of ACUMER® 9300 may cause some separation of the components. Although product performance is not impaired as long as the whole container is heated and well mixed, it is recommended to keep ACUMER® 9300 out of freezing. SAFE HANDLING INFORMATION • Caution : - may cause eye irritation and slight skin irritation. • First aid measures :

CHEMISTRY AND MECHANISM OF ACTION ACUMER®

9300 is the sodium salt of a polyacrylic acid selected for optimizing the factors affecting dispersancy : - polymer molecular weight - polymer composition - polymer structure - mode of surface adsorption DISPERSION PERFORMANCE Without dispersant, the particles in a slurry aggregate resulting in an unstable slurry with unacceptable high viscosity. ACUMER®

9300 mining polymer stabilizes high solids slurries and allows lowering the viscosity to relatively low levels at the time of initial formulation and maintains a low viscosity during storage. DOSAGE ACUMER® 9300 is effective at low dosage between 0.2 to 0.6 % polymer solids on slurry solids depending on the nature of the slurry and on the grinding (coarse or fine particles). APPLICATIONS ACUMER® 9300 can be used efficiently for the dispersion of different slurries

- with skin : wash skin thoroughly with soap and water. Remove contaminated clothing and launder before rewearing. - with eyes: flush eyes with plenty of water for at least 15 minutes and then call a physician. - If swallowed : if victim is conscious, dilute the liquid by giving the victim water to drink and then call a physician. If the victim is unconscious, call a physician immediately. Never give an unconscious person anything to drink. • Toxicity : - Acute oral (LD50) rats : > 5g/kg. MATERIAL SAFETY DATA SHEETS Rohm and Haas Company maintains Material Safety Data Sheets (MSDS) on all of its products. These contain important information that you need to protect your employees and customers against any known health and safety hazards associated with these products. We recommend you obtain copies of MSDS for our products from your local Rohm and Haas technical representative or the Rohm and Haas Company. We also suggest that you your supplier of other materials recommended for use with our products for the appropriate health and safety precautions before using them.

More information on the web about our products and services, and all our worldwide addresses :

www.rhcis.com Rohm and Haas Consumer and Industrial Specialties

ACUMER® is a trademark of Rohm and Haas Company, or of its subsidiaries or s. The Company's policy is to its trademarks where products designated thereby are marketed by the Company, its subsidiaries or s. These suggestions and data are based on information we believe to be reliable.They are offered in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. We recommended that the prospective determine the suitability of our materials and suggestions before adopting them on a commercial scale. Suggestions for uses of our products or the inclusion of descriptive material from patents and the citation of specific patents in this publication should not be understood as recommending the use of our products in violation of any patent or as permission or license to use any patents of the Rohm and Haas Company.

© 2001. Rohm and Haas Company.

Printed in 9300.TDS.ER.E.05/2001

POLY.ACUMER