Poly Anionic cellulose, PAC-LV, PAC-HV

Poly anionic cellulose (PAC) is a water-soluble polymer derived from cellulose and modified with carboxymethyl groups. It finds extensive use in various industries, including oil drilling, construction, pharmaceuticals, and food. PAC is available in different viscosity grades, with PAC-LV (Low Viscosity) and PAC-HV (High Viscosity) being two common variants. Here’s a breakdown of each:

1. Poly anionic Cellulose (PAC):
   • PAC is a cellulose derivative that imparts rheological properties to aqueous solutions.
   • It is used as a viscosifier, fluid loss control agent, and rheology modifier in a wide range of applications.
   • PAC is highly effective in controlling fluid properties such as viscosity, suspension of solids, and fluid loss, making it valuable in various industrial processes.
2. PAC-LV (Low Viscosity):
   • PAC-LV is a grade of polyanionic cellulose with low viscosity.
   • It is typically used when moderate viscosity and fluid loss control are required in applications such as oil drilling, construction, and pharmaceuticals.
   • PAC-LV provides viscosification and fluid loss control properties while maintaining lower viscosity compared to PAC-HV.
3. PAC-HV (High Viscosity):
   • PAC-HV is a grade of polyanionic cellulose with high viscosity.
   • It is employed when high viscosity and excellent fluid loss control are needed, especially in demanding applications such as oil and gas drilling.
   • PAC-HV is particularly effective in maintaining wellbore stability, carrying capacity for drilled cuttings, and controlling fluid loss in challenging drilling conditions.

Applications:

• Oil and Gas Drilling: Both PAC-LV and PAC-HV are essential additives in water-based drilling fluids, contributing to viscosity control, fluid loss control, and rheology modification.
• Construction: PAC-LV may be used as a thickener and water retention agent in cementitious formulations such as grouts, slurries, and mortars used in construction applications.
• Pharmaceuticals: PAC-LV and PAC-HV can serve as binders, disintegrants, and controlled-release agents in tablet and capsule formulations in pharmaceuticals.
• Food Industry: PAC is used as a thickener, stabilizer, and emulsifier in food products, providing texture and improving shelf-life stability.

In summary, polyanionic cellulose in both low viscosity (PAC-LV) and high viscosity (PAC-HV) grades plays a crucial role in various industries, providing rheological control, viscosity modification, and fluid loss control properties tailored to specific application requirements.