Amino carboxylic acid type copper inhibitor-containing polypropylene composite material and preparation method thereof

Abstract

The invention relates to an amino carboxylic acid type copper inhibitor-containing polypropylene composite material and a preparation method thereof. The polypropylene composite material is obtained by mixing 70-90% of polypropylene, 0.01-1% of an amino carboxylic acid type copper inhibitor, 0.1-10% of an inorganic filler, 0.1-0.5% of an antioxidant, 0.1-0.3% of an ultraviolet absorbent and 5-20% of a fire retardant. The method comprises the following steps: mixing above raw materials in proportion to form a mixture, extruding the mixture through a double screw extruder, cooling with water, drafting, and carrying out cutting granulation to granules. The copper inhibitor which is an amino carboxylic acid substance forms many chelated coordination structures with copper ions to generate a chelate having a high stability, and the chelate has the advantages of strong inhibition of the ageing catalysis capability of heavy metal ions, substantial copper harm resistance, good compatibility with resins, no migration, no pollution, water resistance, good oil extraction property, and no influences on the electric insulation performance or other performances of the resins.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and relates to a polypropylene composite material and a preparation method thereof, in particular to an aminocarboxylic acid-containing anti-copper agent polypropylene composite material for wires and cables and a preparation method thereof. Background technique

[0002] In recent years, with the development of electric power and communication industries, the demand for wires and cables is gradually increasing. All kinds of cables and electrical appliances mostly use copper core cables, and their outer insulating coatings are polyolefin plastics, among which propylene copolymers have shown incomparable advantages as other materials in terms of communication cable insulation materials. However, due to the presence of methyl groups and tertiary carbon atoms in polypropylene molecules, it is very susceptible to light or heat aging, especially in the presence of copper ions, and the aging d...