Heat-resisting anti-flaming polypropylene compound and preparation method thereof

Abstract

The invention discloses a heat-resisting anti-flaming polypropylene compound which comprises the following components in parts by weight: 100 parts of polypropylene resin, 5-25 parts of brominated flame retardant, 5-25 parts of phosphorus based flame retardant and 0.5-7 parts of compounded flame retardant synergist of inorganic powder filler and zinc-containing inorganic compound, wherein the dosage of inorganic powder filler can be 0 and the total dosage of brominated flame retardant and phosphorus based flame retardant is 10-35 parts. According to the invention, brominated flame retardant, phosphorus based flame retardant and compounded flame retardant synergist of inorganic powder filler and zinc-containing inorganic compound are added into polypropylene resin, so that the heat-resisting anti-flaming polypropylene compound disclosed by the invention has the advantages of excellent flame resistance, difficulty in separation, excellent heat resistance, low smoke release during combustion process, environmental protection, less dosage of brominated flame retardant and phosphorus based flame retardant, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a heat-resistant and flame-retardant polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene has become one of the most widely used general-purpose plastics because of its excellent comprehensive properties, good cost performance, and wide processing and molding conditions. Polypropylene is a typical flammable material. Its limiting oxygen index is 17-18%. It is extremely flammable and cannot self-extinguish after being ignited. With the gradual improvement of material safety requirements, polypropylene materials must be modified for flame retardancy. [0003] Flame retardants used in polypropylene are mainly divided into bromine-antimony flame retardants and halogen-free flame retardants. In the existing flame-retardant modified polypropylene materials, in order to meet the requirements of halogen-free, it is necessary to...

AI Technical Summary

Problems solved by technology

However, compared with the traditional bromine-antimony compound flame retardant system, these flame retardant systems have disadvantages such as low flame retardant efficiency and easy precipitation, and need to add more than 30%, and there are still great limitations in wide application.

Brominated flame retardants themselves have no flame retardant effect, so they must be used in combination with antimony-containing compounds. Bromine-antimony flame retardants have the advantages of high flame retardant efficiency and less impact on physical properties. The dosage of 30% can reach The V0 (2.0mm) level of UL-94, but it also has the disadvantages of high smoke density, poor heat resistance, and easy precipitation when burning.

[0004] With the continuous improvement of application requirements in downstream industries, more and more product and safety regulations hope that materials can achieve V-0 flame retardant grades and as little smoke emission as possible, and antimony is used as a rare element in flame retardants It will lead to the reduction of mineral resources, and has been restricted in some regulations (such as California Bill 65)