A kind of anti-migration environment-friendly PVC modified material and preparation method thereof

Abstract

The invention relates to the technical field of PVC modified materials and particularly relates to a migration-resistant environment-friendly PVC (Polyvinyl Chloride) modified material and a preparation method thereof. The migration-resistant environment-friendly PVC modified material is composed of 80-120 parts of PVC resin, 30-45 parts of filling agent, 50-70 parts of plasticizer, 3-7 parts of heat stabilizer, 2-5 parts of flame retardant and 0.5-1.5 parts of lubricating agent, wherein the plasticizer is a mixture composed of trioctyl trimellate and a nonmigrating plasticizer PN1030 at the weight ratio of 1 to (1-2), the heat stabilizer is a mixture composed of a main stabilizer, an auxiliary stabilizer and an auxiliary at the weight ratio of (20-40) to (4-8) to 1, and the main stabilizer is a mixture composed of an organic tin compound and a rare earth compound at the weight ratio of (2.2-2.8) to 1. All indexes of the migration-resistant environment-friendly PVC modified material prepared by using the preparation method exceed the national standard, and the migration-resistant environment-friendly PVC modified material is favorable in PS migration resistance and ABS migration resistance and environment friendly.

Description

technical field [0001] The invention relates to the technical field of PVC modified materials, in particular to a migration-resistant and environment-friendly PVC modified material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the earliest industrialized and widely used general-purpose thermoplastics. It has the advantages of light weight, high strength, insulation, flame retardancy, corrosion resistance, excellent comprehensive performance, low price and wide source of raw materials; but also There are the following disadvantages: 1. The toughness is poor, and it is easy to be brittle when impacted, so it cannot be used as a structural material. In addition, the brittleness of polyvinyl chloride is greatly affected by temperature. The lower limit of general PVC products is -15°C. The lower limit of use of PVC is -30°C; 2. Poor thermal stability, it begins to decompose HCl at 100°C, and decomposes more rapidly when it is h...

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Problems solved by technology

[0002] Polyvinyl chloride (PVC) is one of the earliest industrialized and widely used general-purpose thermoplastics. It has light weight, high strength, insulation, flame retardancy, corrosion resistance, It has the advantages of excellent comprehensive performance, low price and wide source of raw materials; but it also has the following disadvantages: 1. Poor toughness, easy to be brittle when impacted, so it cannot be used as a structural material. In addition, the brittleness of polyvinyl chloride is greatly affected by temperature. Large, the lower limit of general PVC products is -15°C, and the lower limit of soft PVC is -30°C; 2. Poor thermal stability, it begins to decompose HCl at 100°C, and decomposes more rapidly when it is higher than 150°C. The melting temperature of PVC is about 210°C; 3. The viscosity of PVC is extremely high and its fluidity is extremely poor, which limits its use to a certain extent.

[0005] The performance indicators of most of the existing PVC materials are only meeting the basic requirements of national standards, and the current PVC materials do not have migration resistance; in addition, the existing PVC sheathed cables, PVC plugs, PVC films and PVC There is quite serious pollution in pipes, which will cause certain harm to human health. It is also particularly important to develop an environmentally friendly PVC modified material.