Hydroxyethyl Cellulose (HEC) is nonionic cellulose ether derived from natural fibre.It is widely used in Cosmetic,Personnel care products, Paint & coating, oilfield, construction, etc., having functions of thickening, bonding, stabilizing, water retaining, film forming, and protective colloids,etc. HEC is soluble in either hot or cold water,have broad range viscosity designed for customer different needs.

Polyanionic cellulose(PAC) is white or light yellowish powder or granular.It is easily soluble in cold or hot water,.The PAC exhibits high performance in various salt resistance,including calcium,magnesium-resistance.It can reduce filtration loss. It can be used in all water based drilling fluids, e.g. salt water based,seawater based and saturated-brine drilling fluids.It can reduce filtration very well.