A kind of low temperature resistant pp-r pipe material and preparation method thereof

Abstract

The invention provides a low-temperature resistant PP-R pipe. The low-temperature resistant PP-R pipe is prepared from the following raw materials in parts by weight: 100 parts of PP-R, 5 parts of PP-B1 and 1-5 parts of a modified masterbatch with a beta-nucleating agent being loaded on the surface. Compared with the prior art, the low-temperature resistant PP-R pipe provided by the invention has the advantages that because the beta-nucleating agent is loaded on the surfaces of inorganic particles in the masterbatch to modify the masterbatch, and PP-B induced crystals are added to prepare the PP-R pipe with a high content of beta-crystals, the crystallization effect of the beta-crystals can be improved significantly, and the problem that the existing PP-R pipe is brittle at a low temperature can be solved effectively.

Description

technical field [0001] The invention relates to the field of polypropylene pipes, in particular to a low-temperature-resistant PP-R pipe and a preparation method thereof. Background technique [0002] PP-R pipes have the advantages of heat preservation, energy saving, environmental protection, excellent heat resistance, oxygen stability and hygienic performance. Compared with other hot and cold water pipes, PP-R pipes are moderately priced and cost-effective, and are suitable for domestic market demand. [0003] At present, the promotion of PP-R pipes in my country is restricted by several factors: (1) The performance of domestic PP-R special resin is not good, and the degree of domestic raw materials is not high. (2) The low temperature toughness of PP-R pipe is poor. Due to poor low temperature impact resistance, PP-R pipes will be embrittled at low temperature under low temperature conditions, so they are easily damaged during transportation. [0004] In recent years, t...

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Problems solved by technology

[0003] At present, the promotion of PP-R pipes in my country is restricted by several factors: (1) The performance of domestic PP-R special resin is not good, and the degree of domestic raw materials is not high

(2) The low temperature toughness of PP-R pipe is poor

Due to poor low temperature impact resistance, PP-R pipes will be embrittled at low temperature under low temperature conditions, so they are easily damaged during transportation

[0004] In recent years, the use of β-nucleating agents to prepare high-performance β-PPR materials has become an important direction in the preparation of PP-R pipeline technology, but there are still some problems to be solved: (1) Since the optimal growth conditions of β-crystals are in ( 110-130℃), and too fast cooling rate will reduce the growth of β crystal; (2) The preparation process of the commercial β-nucleating agent is complicated and the cost is high. It is difficult to disperse in R, and its effect on the β crystal induction of PP-R is limited; (3) PP-R tube color masterbatch generally contains inorganic particles such as titanium dioxide, these inorganic particles have α-nucleation effect on PP-R, if directly Adding the β-nucleating agent method, the filler with α-nucleating effect has an impact on the β-nucleating effect of the β-nucleating agent, resulting in a decrease in the β-nucleating effect of the β-nucleating agent, or even no formation of β-nucleating agent PPR