After years of accumulation, the Shanghai Research Institute of Sinopec Lubrican...details
This product is a solution of polymethacrylate in a highly refined mineral oil. It is a viscosity index improver specially designed for hydraulic fluids with high shear stability.
With narrow molecular weight distribution, it has good low temperature fluidity, excellent shear stability, and can effectively improve the viscosity index and inhibit wax crystallization. Especially for hydrotreating base oil, it has excellent pour point depressant effect. It has excellent filtration performance and anti-emulsification performance.
It is suitable for the modulation of hydraulic oil, especially low-temperature hydraulic oil, and can effectively improves the viscosity index of the oil. Under the premise of ensuring shear stability, it has the double effects of improving the viscosity index and reducing the pour point, and effectively saves the product formula cost.
四、Physical and chemical index evaluation
The evaluation is carried out according to SH/T0622-2007 standard.
10% (mass fraction) SCR-178A is added into Dalian HVI150 base oil, heated to 60℃~70℃, and stirred evenly to obtain the sample. The shear stability index (diesel injector method and KRL), thickening ability, low temperature dynamic viscosity, pour point and other performance parameters of the sample are determined.
The main physical and chemical indexes of SCR-178A viscosity index improver are shown in Table 1
Table 1 The main physical and chemical indexes of SCR-178A viscosity index improver
Using imported hydraulic oil compound, a certain proportion of imported ERTO4 and GS500N-4 base oil and pour point depressant, and using viscosity index improver SCR-178A and imported sample respectively to make HV 46, the kinematic viscosity, viscosity index, pour point, air release value, demulsification, liquid phase corrosion and shear stability of the oil are measured.
The blending scheme is shown in Table 2
Table 2 Blending scheme
The results of experimental analysis are shown in Table 3
Table 3 Experimental analysis results
In Dalian HVI150 base oil, 1%, 2%, 3%, 6%, 10% (mass fraction) SCR-178A were added respectively, heated to 60℃~70℃, and stirred evenly to obtain the sample, and the viscosity index parameters of the oil sample were determined.
Table 4 Viscosity index test analysis results
五、Recommended dosage: The recommended dosage for SCR-178A is 1 to 10%, depending on the actual application. For details, please consult our additive application engineers.
六、Packing and precautions
Please refer to SH/T0164 for transportation, storage and handling. Net weight: 170 Kg/drum, packed in 200 liter metal drum. Non-flammable, non-explosive, non-corrosive.Best Blending temperature: 50-60℃.
Storage temperature below 60℃, avoid repeated heating, keep away from heat.
Conclusion: SCR-178A can be used in low temperature hydraulic oil blending, save the amount of pour point depressant, and effectively improve the viscosity index of oil. This product is processed by advanced technology. Compared with advanced products at home and abroad, it is environmentally friendly and has better economy under the premise of ensuring thickening ability and shear stability. It is the best choice of viscosity index improver.