Environmentally friendly, high and low temperature resistant, oil resistant, wear resistant and fire retardant rubber plastic composition

Abstract

The invention relates to a rubber plastic composition, which is made from the following components of: by weight, 40-50 parts of an acrylonitrile butadiene rubber powder, 30-40 parts of a preplastic polrvinyl chloride powder, 5-15 parts of ternary copolymerized polyamide, 5-15 parts of magnesium hydroxide, 5-15 parts of antimonous oxide and 0.5-1.5 parts of a processing aid. The acrylonitrile butadiene rubber powder is made from components of: by weight, 90-98% of nitrile rubber, 0.15-1% of a vulcanizator, 0.5-3% of an anti-aging agent, 0.5-3% of an activating agent, 0.3-3% of a vulcanizationaccelerator and 0.5-1.2% of an isolating agent. The preplastic polrvinyl chloride powder is made from components of: by weight, 75-90% of a PVC resin, 0.2-1% of an antioxidant, 1-8% of a calcium zincstabilizer and 8-18% of a plasticizer DITDP diisotridecyl phthalate. The composition provided by the invention has excellent high and low temperature resistance, oil resistance, wear resistant and fire retardant performance. In addition, raw materials which are not environmentally friendly are not used. Therefore, the invention is especially applicable to be used as a sheathing compound for wire and cable.

Description

technical field [0001] The invention relates to a rafter-plastic composition, which can be used, for example, as a sheathing material for electric wires and cables. Background technique [0002] Due to the cold and oil-resistant flame-retardant sheathing materials are often used in harsh environmental conditions, such as high temperature, strong ultraviolet radiation, high ozone concentration, chemical corrosion and other conditions, in some places, the highest temperature can exceed 100 ° C, if the cable If the above-mentioned requirements are not met, the cable material is fragile and may even decompose the cable sheath layer. All these situations will directly increase the occurrence of fire or casualties, and the risk of cable short circuit will also increase. Nitrile rubber (NBR), as a copolymer rubber of butadiene and acrylonitrile, has the advantages of excellent oil resistance, aging resistance and wear resistance. And because there are polar groups in the NBR molec...

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Problems solved by technology

[0003] However, the traditional NBR / PVC blending system has complex processing technology, and generally needs to add reinforcing agent carbon black, otherwise the mechanical properties are not good, such as the oil-resistant and low-temperature resistant rubber-plastic composition disclosed in Chinese patent publication CN101353451A and the resistance for electric wire and cable disclosed in CN102050971A. Combustion thermosetting nitrile polyvinyl chloride rubber

The wear resistance and high temperature resistance of the traditional system is not good. Generally, it can only meet the short-term low temperature oil resistance performance, and cannot meet the long-term high temperature oil immersion performance requirements at 105 ° C.

Traditional flame retardant NBR / PVC blending system, if the environment-friendly magnesium-aluminum flame retardant system is used, more flame retardant additions (generally 50-70 parts) are required, resulting in increased costs; while non-environmental protection flame retardants are used Although the amount can be less, it is not good for the environment

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