PPR/PVC pipe masterbatch

Polypropylene (PP) is widely used in automobiles, home appliances, building materials, sports facilities and other fields because of its good comprehensive mechanical properties, wear resistance and corrosion resistance, easy molding and processing, light weight and low price. Especially in the application of transportation pipelines, PP pipe materials have become a new type of pipe material that has been rapidly developed and applied after cast iron pipes, galvanized steel pipes, polyvinyl chloride (PVC) pipes, cross-linked polyethylene and aluminum-plastic composite pipes. PP pipes are divided into homopolypropylene (PP-H), block copolymerized polypropylene (PP-B) and random copolymerized polypropylene (PP-R) according to their different polymerization processes and molecular structure characteristics, of which PP-H Although the pipe has excellent rigidity and strength, the disadvantage of large brittleness at low temperature limits its use, and is gradually replaced by PP-B and PP-R pipes. Although PP-B pipes have good flexibility and excellent low temperature impact performance, they are mainly used in cold water systems and floor heating systems due to their poor creep resistance. PP-R pipes are more widely used due to their multiple advantages such as good rigidity, good low temperature impact performance and outstanding creep resistance.
However, during the processing and use of PP-R pipes, especially in the application of hot and cold water pipelines, due to the action of heat, oxygen and other factors, carbon-hydrogen or carbon-carbon homogenous cracking and degradation, resulting in molecular chain breakage, That is, the relative molecular mass decreases. The change of the melt index of the material can better reflect the aging degree of the PPR pipe. It is a very critical indicator that the change of the melt index of the PPR pipe material should be within 10% after aging at 150 ° C for 1000 hours.

Using the synergistic effect of a variety of high-efficiency anti-aging additives, the developed high-temperature thermo-oxidative aging masterbatch for PPR pipes. This product imparts very good processing stability and long-term thermo-oxidative stability to polypropylene, which can significantly extend its service life. Mainly have the following characteristics:
       (1) Extremely excellent high-temperature thermo-oxidative stability, only need to add 2%, after 1000h of high-temperature thermo-oxidative aging at 150 °C, the melt index change of the polypropylene pipe material can be guaranteed within 10%, and the material properties are basically unchanged. Change;
       (2) Outstanding processing stability, to ensure the stable operation of production and improve production efficiency;
       (3) The anti-aging ingredients in PP have excellent dispersibility, high stability and long-lasting action time, which ensures the full play of its anti-aging effect;
       (4) The melt flowability and excellent compatibility with the PP material matrix resin are easy to achieve blending and uniform dispersion.
       (5) There is no dust pollution, and the production process is guaranteed to be hygienic and clean.