PPR (polypropylene-random) water supply pipe material with high environmental stress cracking resistance and preparation method thereof

Abstract

The invention relates to a PPR (polypropylene-random) water supply pipe material with high environmental stress cracking resistance. The PPR water supply pipe material comprises raw materials in parts by weight as follows: 15-20 parts of PPB (polypropylene block copolymer), 65-75 parts of PPR, 6-10 parts of low-cis polybutadiene rubber, 6-10 parts of polyisobutene, 2-4 parts of paraffin oil, 0.3-0.5 parts of an initiator and 0.3-0.5 parts of an antioxidant. The invention further provides an application of the PPR water supply pipe material in preparation of PPR water supply pipes. The PPR water supply pipes prepared from the PPR water supply pipe material have excellent environmental stress cracking resistance, cold resistance and low-temperature toughness and can be used in an ultra-low-temperature environment, so that the use range of the PPR pipes is enlarged.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PPR water supply pipe with high resistance to environmental stress cracking. Background technique [0002] The PPR pipe extruded from random copolymerized polypropylene (PPR) has good impact resistance, temperature resistance, creep resistance and good hot-melt welding performance, so it can be used as an environmentally friendly transportation pipe. Water pipes are widely used in building cold and hot water, pure water supply, heating and general industrial fluid pipes. However, due to the structure of the PP base material itself, at low temperatures, the pipes prepared from the PP base material have defects such as brittleness and cracking, poor environmental stress cracking resistance, and low impact strength, which seriously restrict With the development of PPR pipes in the north, it is still an urgent technical problem to seek a PPR water supply pipe with ultra-low ...

AI Technical Summary

Problems solved by technology

However, due to the structure of the PP base material itself, at low temperatures, the pipes prepared from the PP base material have defects such as brittleness and cracking, poor environmental stress cracking resistance, and low impact strength, which seriously restrict The development of PPR pipes in the north, therefore, seeking a PPR water supply pipe with ultra-low temperature resistance and high environmental stress cracking resistance is still a technical problem that needs to be solved urgently.