A kind of composite additive for random copolymerized polypropylene pipe

Abstract

The invention discloses a compound additive for a polypropylene random copolymer tubular product. The compound additive is prepared from the following components in parts by weight: 10 to 20 parts ofa processing auxiliary agent, 10 to 30 parts of a long-acting antioxidant, 40 to 60 parts of an antioxidant and 10 to 30 parts of stearate. According to the compound additive for the polypropylene random copolymer tubular product, disclosed by the invention, the processing auxiliary agent is added so that the processing performance of materials is easy to improve; the surface evenness and smoothness of a product are improved and the abrasion of equipment is reduced; the long-acting antioxidant is added so that the hot water washing resisting performance of the product is improved and the long-period weather resisting performance of the product is kept; properties including the melt index, the tensile yield strength, the impact strength of a simply supported notch beam, the bending modulus,the load deformation temperature, the Rockwell hardness and the like of the materials are effectively improved.

Description

technical field [0001] The invention relates to a macromolecular material auxiliary, in particular to a composite additive for random copolymerized polypropylene pipes. Background technique [0002] Random copolymer polypropylene pipe (PPR pipe) is a new generation of energy-saving and environmentally friendly plastic pipes developed in the 1990s. It has light weight, excellent impact resistance, good long-term creep resistance, pressure resistance, heat resistance, chemical resistance. Corrosion and other advantages, the most suitable temperature is 10 ~ 70 ℃. PPR pipe is used to transport cold and hot water for a long time, so it has higher requirements on the thermal stability, hot water extraction and long-term performance of the material, and the use of ordinary antioxidants will affect the long-term performance of PPR pipe; PPR pipe Due to the large molecular weight, poor processing performance and low production efficiency, the material is prone to swelling, material...

AI Technical Summary

Problems solved by technology

PPR pipes are used for long-term transportation of hot and cold water, so there are high requirements for thermal stability, hot water extraction resistance and long-term performance of materials, and the use of ordinary antioxidants will affect the long-term performance of PPR pipes; PPR pipes Due to the high molecular weight, poor processability and low production efficiency of the material, it is prone to swelling, accumulation of material on the touch head, rough surface of the product, etc.

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