Heat stabilizing lubricant for polyvinyl chloride 105D cable material and preparation method thereof

Abstract

The invention discloses a heat stabilizing lubricant for a polyvinyl chloride 105D cable material and a preparation method thereof. The heat stabilizing lubricant is prepared from the following raw materials in percentage by weight: 5.67 to 14.18 percent of stearic acid, 0.69 to 1.71 percent of salicylic acid, 0.93 to 2.31 percent of diglycol, 33.02 to 82.54 percent of yellow lead, 3.93 to 9.81 percent of paraffin, 0.13 to 0.3 percent of glacial acetic acid, 4.52 to 11.30 percent of cyanuric acid, and 1.13 to 2.83 percent of bisphenol A. The method for preparing the heat stabilizing lubricant comprises the following steps: preparing an aid 1 from 7.65 to 19.11 percent of stearic acid, 5.24 to 13.1 percent of salicylic acid and 23.44 to 58.59 percent of diglycol; preparing an aid 2 from 0.45 to 1.13 percent of stearic acid, the rest of salicylic acid, and the rest of diglycol; preparing an intermediate from 7.2 to 18 percent of yellow lead, the rest of stearic acid, and the paraffin; preparing a synthetic material from the rest of yellow lead, the glacial acetic acid, and the cyanuric acid; preparing a composite material from 15.35 to 38.36 percent of intermediate, 25 to 62.5 percent of aid 1, and the synthetic material; and reacting the composite material, the rest of intermediate, the rest of aid 1, the aid 2 and the bisphenol A in a kneading machine, and performing extrusion molding.

Description

technical field [0001] The invention relates to a thermally stable lubricant for polyvinyl chloride 105D cable materials, 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 dehy...

AI Technical Summary

Problems solved by technology

However, the traditional tri-salt and di-salt monomer heat stabilizers are powdery, and there are disadvantages such as backward production technology, large energy consumption, many operating procedures during use, repeated weighing or grinding before use; in PVC resin Poor dispersibility, undispersed white spots, difficult to control the internal quality of the product, large dosage, low thermal stability efficiency, general processability; serious toxic lead dust flying in the process of production and use, not only very harmful to human health , and pollute the environment

[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.