Polyvinyl chloride/nitrile rubber/phyllo-silicate nano composite material and preparation method thereof

Abstract

The invention relates to a polyvinyl chloride / nitrile rubber / layered silicate nano-composite and a preparation method thereof, which mainly uses the polyvinyl chloride as a substrate, by adding in certain proportions of nitrile rubber powder, nano-layered silicate, conductive carbon black, light calcium carbonate, lubricant, plasticizer and heating composite stabilizer materials, a new polyvinyl chloride / nitrile rubber / layered silicate nano-composite is prepared. The raw materials mentioned above are weighed and mixed except the nitrile rubber powder, and kneaded by a high-speed kneading machine after being mixed, with a kneading temperature of 110-125 DEG C, then material being kneaded is put into a cold mixer for cold mixing, and the weighed nitrile rubber powder is added in when in cold mixing, material is discharged when being cold mixed to lower than 40 DEG C, an extruder is used for plastic extrusion or multi-layer co-extrusion mold, and finally a pipe, a fitting and a roller body are manufactured. Compared with present flame retardant and antistatic PE and PVC materials, the polyvinyl chloride / nitrile rubber / layered silicate nano-composite not only has the toughness of the PE, but also is provided with the intensity of the PVC, thus being capable of being widely applied to such combustible and explosive areas as coal mine, oil field, natural gas and mine.

Description

Technical field: [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyvinyl chloride / nitrile rubber / layered silicate nanocomposite material and a preparation method thereof. technical background: [0002] At present, the pipes, pipe fittings and roller bodies used for drainage, ventilation, compressed air and gas drainage in coal mines, oil fields, natural gas and underground mines are mainly made of steel and modified PE and PVC materials with flame retardant and antistatic properties. host. Due to the harsh environment mentioned above, some of the humidity can reach more than 90%. Among these materials, steel has the disadvantages of being not corrosion-resistant, easy to rust, heavy, difficult to carry, and high in use cost. And the shortcomings of low strength lead to short service life and flammability (not conducive to coal mine safety). At the same time, the wall thickness of the same pipe diameter is 1 / 4 thicker than PVC...

AI Technical Summary

Problems solved by technology

Due to the harsh environment mentioned above, some of the humidity can reach more than 90%. Among these materials, steel has the disadvantages of being not corrosion-resistant, easy to rust, heavy, difficult to carry, and high in use cost. And the shortcomings of low strength lead to short service life and flammability (not conducive to coal mine safety). At the same time, the wall thickness of the same pipe diameter is 1 / 4 thicker than PVC, and the cost is high, and the unit weight is large; more importantly, raw materials are expensive and production The cost is high. It takes 7-8 tons of oil to produce 1 ton of PE material, which is not conducive to the energy saving and consumption reduction of strategic resources. Due to the poor toughness of PVC materials, it is easy to become brittle and break at low temperature (-20C°). It also affects its service life, and the use environment is restricted by temperature

[0003] At present, modified PE materials and PVC materials are the key research and development directions of materials used in coal mines, oil fields, natural gas and mining fields. Among the previous research and development achievements, such as the "layered nano-silicate / spherical Co-modified Polyvinyl Chloride Composite Materials and Its Preparation Method with Nanoparticles Cooperatively, ZL00122333.X’s “Preparation Method of Nanoparticles Toughened and Plasticized Polyvinyl Chloride” and ZL200710069856.4’s “Composite Modification of Nano-Talc and Nano-Calcium Carbonate "Preparation method of PVC resin", as well as foreign studies on the use of nitrile rubber mixed with polyvinyl chloride, and nano-layered silicate mixed with polyvinyl chloride, are modified by a single nano-silicate, nano-talc and nano-calcium carbonate. Although PVC has improved the strength of PVC, the toughness has not been improved, making the PVC material more likely to become brittle and cracked; and PVC modified by nitrile rubber, although the toughness has been greatly improved, but it also affects the PVC. strength