It is understood that white oil is made from the high-boiling fraction of petroleum fractionation (i.e. lubricating oil fraction) through dewaxing, carbonization, neutralization, activated clay decolorization and refining. It was formed later. Colorless and transparent oily liquid with no odor. Relative density: 0.831-0.883, flash point (formula) 164-223℃, kinematic viscosity (40℃) 5.7-46mm2/S, acid value ≤0.05, stable to acid, light and heat, insoluble in ethanol, soluble in ether , benzene, petroleum ether, etc., and can be miscible with most fatty oils. It is a mixture of liquid hydrocarbons, the main component of which is a mixture of C16-C31 normal isoparaffins.
The application and precautions of white oil in plastic modification:
The main function of white oil is to promote the plasticization of materials and improve the fluidity of materials. , improve the dispersion of materials.
1. Application of white oil in TPE elastomer materials: Generally, the added amount is less than 2 times of the rubber phase SEBS or SBS. It mainly plays the role of improving the plasticization of the material and adjusting the hardness of the material. Improve the processing performance of materials and reduce the cost of materials. Generally speaking, SEBS has better oil absorption than SBS and is easier to absorb oil. It should be noted that in the modification of TPE, white oil absorbs oil very well when using SEBS, but using SBS to absorb oil requires absorbing oil at high temperatures. When the temperature reaches above 80 degrees, it can ensure that the rubber can fully absorb oil, otherwise the material products There will be problems with surface precipitation.
2. Application of white oil in general plastics: used in PE material membranes to improve the processing performance of the material and improve fluidity; in the application of PP materials, it is mainly used for flame retardant modification and addition The direction of mineral powder modification is mainly to improve the dispersion and adhesion between mineral powder and resin
3. Application of white oil in engineering plastics: adding white oil to materials such as ABS and PA, mainly It plays a role in the adhesion between mineral powder and resin, as well as the demoulding property during later injection molding. However, white oil will affect the flame retardant performance of flame retardant materials, especially flame retardant grades above V0. Most flame retardant materials use silicone oil instead of white oil.
PS: When adding toner to the modified plastic, add some white oil, mainly to better adhere the toner to the plastic particles. You can use the toner to be dispersed more uniformly. White oil When used in plastic modification, the addition amount is 0.1-0.5%, which can better exert the processing performance and dispersion performance of the material. The proportion of the added amount cannot be too high or too low. If it is less than 0.1%, the exhaust port will draw away the white oil during material processing, and the effect of the white oil will not be achieved. When it is higher than 0.5%, the white oil will be removed during the processing. If the white oil is too much, the material will slip in the screw, which will reduce the dispersion of the material and reduce the processing performance of the material.
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