Hard impact-resistant polyvinyl chloride composition and preparation method thereof

Abstract

The invention provides a hard impact-resistant polyvinyl chloride composition and a preparation method thereof, and relates to the field of polyvinyl chloride material. The composition comprises following mixed materials: polyvinyl chloride resin, a stabilizer, and completely-vulcanized acrylate rubber powder; wherein by taking the weight of polyvinyl chloride as 100 parts, the weight of the completely-vulcanized acrylate rubber powder is 0.1 to 40 parts; the polymerization degree of the polyvinyl chloride is larger than 700; the average particle size of the completely-vulcanized acrylate rubber powder is in the range of 20 to 200 nm, and the gel content of the completely-vulcanized acrylate rubber powder is 60 wt% or more. Compared to those of nitrile rubber modified hard compact-resistant polyvinyl chloride composition in the prior art, the polyvinyl chloride composition mentioned in the invention has higher strength and impact-resistant performance and lower maximum torque and plasticizing balance torque, can improve the mechanical property and plasticization processing property of the polyvinyl chloride material at the same time, and has the advantages of simple technology, easy operation, and suitability for industrial production.

Description

technical field [0001] The present invention relates to polyvinyl chloride (PVC) composition, more specifically, relates to a kind of rigid anti-impact PVC composition and its preparation method. Background technique [0002] PVC is a general-purpose plastic with large output, wide application and excellent comprehensive performance. As a large category of polyvinyl chloride, rigid polyvinyl chloride has a large application field. The advantages of rigid polyvinyl chloride products are flame retardancy, wear resistance, chemical corrosion resistance, and low leakage of gas and water vapor. In addition, the comprehensive mechanical properties, product transparency, electrical insulation, heat insulation, noise reduction, and vibration reduction are also good. Its disadvantages are poor thermal stability, tensile properties, and impact resistance. The notched impact strength of pure rigid PVC is only 3-5KJ / m 2 , and the elongation at break is also very low, which belongs t...

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Problems solved by technology

The preparation process of the impact modifier in this patent is divided into 4 to 7 stages, the process is relatively complicated, and the control conditions are relatively high.

[0007] The scientific and technological journal "Plastic Additives", No. 5, 2007, pages 33-37, "Research on Full-Vulcanized Powdered Nitrile Rubber Modified Rigid Polyvinyl Chloride" proposed that it was found through research that the use of fully-vulcanized powdered nitrile rubber or Fully vulcanized powder carboxylated nitrile rubber modified polyvinyl chloride can improve its impact resistance, but it does not significantly improve the plasticizing performance of polyvinyl chloride

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