Thermostable lubrication reinforcing agent used for polyvinyl chloride profiles and its preparation method

Abstract

The invention discloses a thermostable lubrication reinforcing agent used for processing polyvinyl chloride profiles and its preparation method. The reinforcing agent is prepared by the following raw materials (w / w): 12.98-25.97% of eleaostearic acid, 0.55-1.09% of salicylic acid, 1.03-2.06% of diethylene glycol, 33.61-67.22% of yellow lead, 6.75-13.50% of paraffin, 0.13-0.25% of glacial acetic acid, 4.58-9.17% of cyanuric acid, and 0.37-0.73% of xylene. The preparation method comprises: taking a technological amount of eleaostearic acid, salicylic acid, diethylene glycol, and xylene respectively to prepare an auxiliary agent 1, an auxiliary agent 2 and an auxiliary agent 3; taking a technological amount of yellow lead, eleaostearic acid and paraffin to prepare an intermediate; and making the rest yellow lead with glacial acetic acid and cyanuric acid into a synthetic material; making the prepared auxiliary agent 1, part of the prepared intermediate, and the synthetic material into a composite material; mixing the composite material, the rest intermediate, as well as the rest of the auxiliary agent 1, the auxiliary agent 2, the auxiliary agent 3 and the eleaostearic acid in a kneading machine, then conducting extrusion moulding.

Description

technical field [0001] The invention relates to a thermally stable lubrication enhancer for polyvinyl chloride profiles, including the composition and preparation method of the thermal stabilizer. Background technique [0002] Polyvinyl chloride is also called PVC. Its molecules are relatively polar molecules. Due to the large intermolecular force, its softening temperature and melting temperature are high, and its glass transition temperature is high. Therefore, it generally needs to be heated to above 150-160°C. In order to make it plasticized, the processing temperature is usually between 160 and 210 °C. However, PVC resin is extremely unstable to heat. It is easy to degrade and dehydrochloride at the processing temperature. This reaction causes PVC to produce polyene sequences of colored conjugated double bonds, resulting in discoloration, brittleness and corrosion of equipment. In severe cases, it will make processing impossible. [0003] In order to inhibit the dehyd...

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Problems solved by technology

[0005] Domestic production of dust-free composite lead-salt stabilizers has not started since the 1980s. Although this stabilizer has solved the problem of flying lead-salt dust, the design concept has not deviated from the traditional three-salt and two-salt as the main heat stabilizer. Mode, the processing technology is to physically mix various monomers and then press them into sheets. Due to poor quality and low grade, it can only be used for low-grade and low-quality PVC products.