Halogen-free red phosphorus-free heat shrinkable tube and its preparation method

Abstract

A halogen-free red phosphorus-free heat shrinkable tube and its preparation method. The heat shrinkable tube comprises the following components by weight: 45-75 parts of an ethylene -acetic acid copolymer, 2-10 parts of an ethylene-octene copolymer elastomer, 10-50 parts of a halogen-free flame retardant, 1-30 parts of a flame retardant auxiliary agent, 1-10 parts of a filling material, 0.1-10 parts of a compatibilizer and 0.1-9 parts of other additives. The flame retardant auxiliary agent is magnesium hydroxide / or aluminum hydroxide / or modified magnesium hydroxide / or cyanuric acid salt (MCA), and other additives comprise an antioxidant, a lubricant, a colorant and carbon black. The halogen-free red phosphorus-free heat shrinkable tube uses a halogen-free flame retardant as the flame retardant, a nitrogen flame retardant as the flame retardant auxiliary agent, does not contain halogen flame retardant or red phosphorus, is halogen-free, environment-friendly and meets environmental regulatory requirements; and the halogen-free red phosphorus-free heat shrinkable tube has a wide range of application, and can be used in the connector port in the fields civil or military facilities.

Description

technical field [0001] The invention relates to the field of materials, in particular to a halogen-free and red phosphorus-free heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] In August 2010, a refrigerator of a well-known company issued a recall notice. The reason for this recall is explained as follows: "Because the red phosphorus flame retardant is used in the parts (refrigerant control valve) that control the refrigerant (refrigerant), under high temperature and high humidity environment, the coil of the refrigerant control valve may be disconnected, resulting in ' Abnormal phenomenon of "refrigerator not cold" or "refrigerator too cold". [0003] Ordinary red phosphorus has many defects such as easy oxidation in air, moisture absorption and poor compatibility with polymer materials. The application and research of red phosphorus as a flame retardant has a history of more than 40 years. Since 1965, red phosphorus flame retardant h...

AI Technical Summary

Problems solved by technology

However, when red phosphorus burns, it produces pungent smoke, especially in a humid environment, it reacts slowly with oxygen to produce highly toxic phosphine (PH3) gas, and red phosphorus dust is flammable in a closed environment Explosive, more red phosphorus dust in airtight rooms will be natural due to local high temperature, and there are hidden dangers of safety accidents in production

Images