Source & Processing
Polyanionic cellulose, or (PAC), is a safe thickening agent. PAC, a water soluble anionic polymer derived from cellulose, is comprised of the woody parts and cell walls of plants. It is chemically modified from natural cellulose and obtained water soluable cellulose ethers.
PAC is used for many different technical applications. These uses are based mainly on its reaction with water content in the finished product. It is used alone or in conjunction with other components in the system to create thickening, water-binding, suspension, stabilizing and emulsifying characteristics. Widly used in Oil drilling fluid control additives, especially in salt water wells and offshore drilling applications. It is a combined filtration controller and minimal viscosifier in fresh and salt water base drilling systems. It is ideal in low solid mud, designed for fast penetration.
It occurs as a white-to-cream colored powder or granules. It is hydroscopic and insoluble in most solvents. The powder will be nearly odorless and transparent in solution.
PAC is a water-soluble polymer soluble in either hot or cold water. It is insoluble in organic solvents but will dissolve in miscible solvents as ethanol or acetone.It is higly salt tolerant. PAC viscosity will not increase with temperature.
Viscosity ranges are from low to high with any desirable viscosity in between. Most concentrations are based on 2% KCI solution (the preparation of fracturing fliud must be added) and dissolution performance. With ease of use with on site preparation and with a fast gel enables the ability of the prodcut to carry sand. Point of complete hydration is achieved faster with finer mesh grades but care in dispersion is required.