Multifunctional plastic additive and preparation method thereof

Abstract

The invention relates to the field of plastic processing and in particular relates to a multifunctional plastic additive and a preparation method thereof. The multifunctional plastic additive comprises the following components in parts by weight: 70-89 parts of light calcium carbonate powder, 10-15 parts of stearate, 1.0-1.8 parts of mica powder, 3-5 parts of light magnesium oxide powder, 1-2 parts of organic tin, 2-3 parts of glass fiber powder, 1-2 parts of methacrylate, 1.0-1.5 parts of a coupler and 2-4 parts of a lubricant. The preparation method comprises the following steps: pre-modifying the light calcium carbonate powder by stearate, mixing the pre-modified light calcium carbonate powder, the mica powder, the light magnesium oxide powder and the glass fiber powder at a low speed, adding other formulation components, producing a high-temperature and low-speed stirring reaction, and discharging to obtain the multifunctional plastic additive. The preparation process is simple, and the prepared plastic additive can be used for improving the tensile strength, the strength, the pressure resistance and the like of a PVC (polyvinyl chloride) wood plastic composite material and a PVC engineering plastic.

Description

technical field [0001] The invention belongs to the field of plastic processing, in particular to a multifunctional plastic additive and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is the second largest synthetic resin after polyethylene, and is widely used in construction, telecommunications, transportation, electronics, chemicals, packaging and other industries. Due to the poor thermal stability of PVC, the difference between softening temperature and decomposition temperature is small, which brings great difficulties to processing. Therefore, a certain amount of heat stabilizer must be added during its processing to improve its thermal stability. At present, heat stabilizers on the market mainly include lead salts, metal soaps, organotins, and rare earths. For a long time, lead salt and barium, cadmium soap stabilizers have dominated the world PVC heat stabilizer market due to their low price and excellent performance. The co...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome existing modified PVC plastics calcium / zinc composite heat stabilizer to have single function, high cost, the polyvinyl chloride PVC wood-plastic sample or the polypropylene PP engineering plastics sample stretching after plastic auxiliary agent modification Strength, impact strength, wear resistance, poor hardness, etc., provide a multifunctional plastic additive based on calcium carbonate, magnesium oxide, mica powder, organic tin, glass fiber and its preparation method