Lubricants PPD (pour point depressant) T806 is the copolymer of fumarate and vinyl acetate, and it has good low-temperature flow ability and excellent depression effect. It can restrain wax component in lubricant to form network structure at low-temperature effectively, therefore, it have great effect  to reduce pour point of lubricant. T806 has a wide range of adaptability; and its viscosity is remarkably lower than domestic T803 series of products. It has the advantages of low viscosity, light colority, transparent appearance etc.