Modified montmorillonite-containing PVC material stabilizer special for cable

Abstract

The invention discloses a modified montmorillonite-containing PVC material stabilizer special for a cable. The PVC material stabilizer is prepared from, by weight, 5-10 parts of the modified montmorillonite, 10-20 parts of zinc naphthenate, 5-15 parts of zinc stearate, 5-10 parts of calcium alkylbenzene sulfonate, 1-3 parts of epoxy resin, 30-50 parts of stearic acid, 5-10 parts of phosphite ester, 1-5 parts of dioctyl phthalate and 1-5 parts of polyethylene glycol. The stabilizer is used in manufacturing of wire and cable colloidal particles, the Congo red time of produced colloidal particles is lager than or equal to 150 min, the humidity resistance of the colloidal particles is good, and the electrical property of the product can be greatly improved.

Description

technical field [0001] The invention belongs to special PVC additives for cables, in particular to a special PVC material stabilizer for cables containing modified montmorillonite. Background technique [0002] PVC cable material is cheap and has excellent performance. It has long occupied an important position in wire and cable insulation and protection materials. However, this material contains harmful substances to the environment and human body, and there are many problems when it is used in special environments. With the enhancement of people's awareness of environmental protection and the improvement of material performance requirements, higher requirements are put forward for PVC materials. [0003] Like most polymers, PVC materials also have the problem of discoloration after irradiation, especially for light-colored materials, which will discolor after irradiation and affect the appearance. They are often not accepted by customers, causing disputes and increasing un...

AI Technical Summary

Problems solved by technology

From a technical analysis, the 200°C Congo red test and the 20°C volume resistivity of wires and cables are mainly determined by the stabilizer used in the processing of PVC cable materials. In addition to the measurement requirements, there are still some difficulties in using other heat stabilizer materials to completely replace lead salt products

In addition, from the perspective of cost, some lead-free and environmentally friendly heat stabilizers are difficult to accept with high prices, or the cost of cable material formulations is too high to be practical, which further hinders the progress of lead-free in the wire and cable industry.