OS PAC RT & LT - Polyanionic Cellulose (Technical)
Polyanionic Cellulose (PAC)
Polyanionic cellulose is a core additive in many water based mud systems due to its functionality, stability and economy. PACs give good fluid loss control by tightening filter cakes, help solids separation by encapsulation of cuttings and contribute to hole cleaning. PAC performance is wholly dependent on its molecular weight, purity and the degree and regularity of the substitution along the cellulose backbone. PAC selection is fundamental to the overall performance of many water based mud systems.
OS PAC RT and LT are high and low molecular weight technical grade polyanionic cellulose polymers.
OS PAC RT and LT can be used in the field up to 150oC / 300oF in fresh, seawater and saturated salt salinities. OS PAC RT and LT are resistant to bacterial attack.
Typical Physical Properties
Appearance - Free flowing off-white powder
Purity - 60 – 65%
Degree of Substitution - ≥0.65
Moisture Content - 10% max
pH of 2% Solution - 5.5 – 8.5
Particle Size - 95% min, pass through 40 mesh
OS PAC RT is a long chain, high molecular weight polymer exhibiting excellent fluid loss control and encapsulation in lower weight mud systems. The chain length and substitution regularity along the cellulose backbone of OS PAC RT ensures the best possible performance.
OS PAC LT is a lower molecular weight and shorter chain polymer that gives lower viscosity and is ideal for higher weight mud systems.
OS PAC RT and LT are packaged in 25 kg sacks.