150 DEG C high-flame-retardant halogen-free red phosphorus-free modified material

Abstract

A 150 DEG C high-flame-retardant halogen-free red phosphorus-free modified material comprises the following components by weight: 100 parts of a vinyl polymer, 10 parts of a grafting agent, 10-30 parts of an inorganic flame retardant, 20-40 parts of an organosilicon flame retardant, 60-90 parts of a nitrogen and phosphorus flame retardant agent, 5-15 parts of a smoke suppressor, 2-5 parts of an antioxidant, 2-5 parts of a light stabilizer, 2-5 parts of a lubricant, 3-5 parts of a crosslinking agent and 5 parts of color masterbatch. The modified material provided by the invention can be applied to production of heat shrink tubing and crosslinking cable for wide usage in the fields of locomotive, ship, spaceflight, nuclear power and war industry.

Description

technical field [0001] The invention relates to a halogen-free and red phosphorus-free modified material that satisfies the grade of 150°C, which is applied to the production of heat-shrinkable tubes and cross-linked cables, and can be widely used in fields such as locomotives, ships, aerospace, nuclear power, and military industry. Background technique [0002] At present, there are two kinds of flame retardant systems for 150°C grade heat shrinkable tubes and wires and cables in the market to meet the high flame retardant requirements, one is halogen-containing (flame retardants are decabromodiphenyl ether and decabromodiphenylethane) system; the other is a halogen-free system containing red phosphorus. The combustion of the halogen-containing system releases the first-class carcinogenic toxic gas of dioxins. The red phosphorus-containing flame retardant system burns and releases irritating smoke; the production process is subject to friction and impact and spontaneous co...

AI Technical Summary

Problems solved by technology

Red phosphorus-containing flame retardant system burns and releases irritating smoke; the production process spontaneously ignites after friction and impact, posing safety hazards; due to its inherent purple red, its application is greatly limited, and bright color products cannot be produced

[0003] At present, the 150°C halogen-free heat-shrinkable tubes and cables on the market are mainly flame retardants such as aluminum hydroxide, magnesium hydroxide, and red phosphorus. Aluminum hydroxide and magnesium hydroxide have low flame retardant efficiency, although red phosphorus has a high flame retardant efficiency. However, adding too much will affect the processing performance and have potential safety hazards, so the amount of addition cannot be increased. It is difficult to pass VW-1 (UL224 standard) for the production of heat-shrinkable tubes using this system. standard

[0004] The temperature grade of ordinary halogen-free heat-shrinkable tubes and wires and cables is mainly between 90-135°C, but in the fields of locomotives, aviation, ships, nuclear power, and military industries, materials with a temperature resistance above 135°C are required. At present, fluoroplastics, silicon Rubber and fluoroplastics are not only expensive raw materials, but also require relatively high equipment costs, and silicone rubber is poor in oil resistance, so it is expected that low-cost halogen-free polyolefin crosslinking materials can be used instead