Calcium molybdate migration-resistant flame-retardant sheath material and preparation method thereof

Abstract

The invention discloses a calcium molybdate migration-resistant flame-retardant sheath material which is prepared from the following raw materials in parts by weight: 90-94 parts of SEBS (styrene-ethylene-butadiene-styrene), 65-68 parts of paraffin oil, 29-31 parts of stearic acid, 21-23 parts of stearic acid graft maleic anhydride, 3-4 parts of antioxidant B215, 81-83 parts of magnesium hydroxide, 4.3-5 parts of graphene, 1.6-1.7 parts of silane coupling agent A-171, 8-9 parts of anhydrous ethanol, 6-8 parts of pentaerythritol, 12-14 parts of carbon black, 6-7.5 parts of calcium molybdate, 3-4 parts of antioxidant 168, 13-15 parts of natural rubber and 1-1.5 parts of calcium zinc heat stabilizer. By using the paraffin-oil-modified SEBS / stearic acid blend as the matrix, the components are proportioned scientifically and reasonably, so the matrix has favorable compatibility with the flame retardant and other compounding agents and does not have the phenomenon of compounding agent migration. The product has the advantages of excellent flame retardancy, favorable mechanical properties and favorable low-temperature flexibility, can not have the phenomenon of migration and precipitation after being used for a long time, and can be used for data lines and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a calcium molybdate migration-resistant flame-retardant sheathing material and a preparation method thereof. Background technique [0002] At present, more than 90% of the electronic wire sheath materials, insulating materials and electronic plug materials widely used in the domestic electronic and electrical industry are made of PVC. However, since July 1, 2006, the European Union has issued a decree to prohibit the entry of electronic and electrical products containing certain harmful substances such as halogen flame retardants and heavy metals into the European market. This has had a serious impact on the export of electronic and electrical products in my country. While the European Union issued its ban, some foreign companies have begun to vigorously promote their products to my country's electrical industry, trying to seize the Chinese market. Under this form, it i...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the halogen-free flame-retardant TPE products on the market use aluminum hydroxide, phosphate composite flame retardant and P-N intumescent flame retardant of ammonium polyphosphate system. Flexibility, mechanical properties are greatly reduced, and hardness is increased; the flame-retardant TPE prepared by the phosphate composite flame retardant has poor flame retardancy, and the phosphate is easy to migrate to the surface of the material for a long time; and ammonium polyphosphate (APP) Although the P-N intumescent flame retardant of the system has high flame retardant efficiency, the water resistance of ammonium polyphosphate is poor, and the electrical properties of the flame retardant TPE products prepared by it are poor. Performance