Flame-retardant polypropylene material containing char-forming agent and preparation method thereof

Abstract

The invention relates to a flame-retardant polypropylene material containing a char-forming agent and a preparation method thereof and relates to the technical field of propylene flame-retardant polymers. The flame-retardant polypropylene material comprises the following components: polypropylene, a char-forming phosphorus-nitrogen flame-retardant P-THEIC (Phosphorus-Trihydroxyethyl Isocyanurate), ammonium polyphosphate, pentaerythritol and a compatilizer. In an ammonium polyphosphate and pentaerythritol flame retardant polypropylene composite material system, the material can reach no drop during combustion and the grade UL-94 level-0 through the addition of a small quantity of P-THEIC phosphorus-nitrogen flame retardant under the situation that the addition amount of the flame retardant is not increased; as the P-THEIC is liquid under normal temperature, through the addition of the P-THEIC, the dispersity of a solid flame retardant in polypropylene can be improved, and the flowing property of the flame-retardant polypropylene material during processing can also be improved, so that molding is facilitated; as the polarity of the P-THEIC flame retardant is very small, the interface affinity is favorably improved, so that the impact strength is obviously improved.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polypropylene, in particular to a flame-retardant polypropylene composite material containing a novel phosphorus-nitrogen expansion flame retardant and a preparation method thereof. Background technique [0002] Polypropylene (PP) is currently one of the resins with the largest output in the world. It is widely used in many industries such as packaging, textiles, building materials, automobiles, electronics and daily necessities. When PP is used in interior building materials, automotive interior materials, and electronic and electrical materials, because polypropylene itself is flammable and drips when burned, it is necessary to modify polypropylene flame retardant. [0003] Flame retardants used in industry are basically divided into halogen-free and halogen-containing flame retardants. Halogen-containing flame retardants are being gradually replaced by halogen-free flame retardants bec...

AI Technical Summary

Problems solved by technology

The oxygen index of traditional ammonium polyphosphate and pentaerythritol flame-retardant polypropylene can be as high as 30 when the addition amount is 30%, but it cannot make the flame-retardant polypropylene composite material drip-free when burning

[0004

Images