Low-smoke halide-free fireproof polyolefine material and its preparation method and application

Abstract

A low-smoke and non-halogen poly-olefine material with radiant graft maleic anhydride vinyl-vinyl acetate multi-polymer as compatilizer is prepared by dissolving maleic anhydride 1-5 proportion into acetone, mixing with vinyl-vinyl acetate multi-polymer 100 proportion, volatilizing for acetone, granulating in double-screw extruder, and electronic-ray or gamma-ray radiating by electronic accelerator with 5-30KGy. The compatilizer graft rate is greater than or equal to 1%, it has better poly-olefine material performance, more white fire retardant and no need for anti-smoke agent. It can be used to make poly-olefine thermal shrinkage pipe with VW-1 vertical burning performance according to UL224 standard.

Description

technical field [0001] The invention relates to a low-smoke, halogen-free flame-retardant polyolefin material, a preparation method and application thereof. Background technique [0002] In 2002, the European Union formulated the "Electronic Waste Disposal Law" consisting of two directives, one of which is the "Directive on the Prohibition of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" (ROHS). The ROHS Directive requires that electrical and electronic products put on the EU market after July 1, 2006 must not contain six harmful substances including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers. At the beginning of 2004, the Ministry of Information Industry of the People's Republic of China formulated the "Administrative Measures for the Prevention and Control of Pollution by Electronic Information Products" (referred to as the "Measures") in accordance with the "Clean Production Pr...

AI Technical Summary

Problems solved by technology

However, there is no low-smoke halogen-free flame-retardant polyolefin shrink tube in other colors than black and red that has passed the VW-1 vertical combustion performance test in the UL224 standard.

The reason may be: if the colored flame retardant red phosphorus is not used, the flame retardant effect of other existing white flame retardants is far lower than red phosphorus (MRP), so in order to meet the above flame retardant standards, it is necessary to add a large amount of However, the performance of the existing EVA-g-MAH as a compatibilizer fails to fully compatibilize the polyolefin substrate and the flame retardant, and the various properties of the prepared polyolefin material are even more impossible meet the above criteria