Halogen-free flame-proof toughening polypropylene composition and preparation process thereof

Abstract

The invention relates to a combination of halgeon-free flame retardant toughening polypropylene and the method for preparing the same. The combination is characterized in that it comprises raw materials with their proportion as follows: polypropylene 40- 70%, flame retardant 10- 40%, toughening agent 5- 20%, compatibilizer 1- 10%, and oxidation resistant agent 0.1- 1%. The method is characterized in that it comprises following steps: employsing one- step process, measuring raw material according to proportion by weight and mixing them in high speed mixing machine; discharging; and putting mixted raw material into screw compressor for granulation. The invention is characterized by employment of halgeon- free flame retardant, which is not harm to environment and human health, and the flame retardant grade reaches to VO class of UL94 standard.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant and toughened polypropylene composition and a preparation method, which has high-efficiency flame-retardant performance and impact resistance, and can be used for electronic and electrical components and polymer products with environmental protection requirements, and belongs to modified polypropylene technology field. Background technique [0002] Polypropylene is a general-purpose plastic widely used in various electronic and electrical components. However, nearly 80% of the flame retardants used in the current flame-retardant polypropylene are halogen-containing flame retardants, especially the bromine-containing flame retardants represented by polybrominated diphenyl ethers and polybrominated biphenyls have high efficiency and low dosage. The performance of the material has little influence, and the price is moderate, and its performance and price ratio cannot be matched by other flame retarda...

AI Technical Summary

Problems solved by technology

However, in recent years, brominated flame retardants have been troubled by the problem of dioxins. At the same time, the polymer materials flame-retardant with its bromine-antimony system will generate a large amount of smoke and corrosive gases during thermal cracking and combustion, and the antistatic property is not good. Strong, the European Union and Japan have issued laws and regulations to prohibit the use of such flame retardants

[0003] Due to the addition of a large amount of flame retardants to flame-retardant polypropylene, the material performance is brittle, and the impact strength of the material is often very low.