Mildew-resistant PVC modified material and preparation method therefor

Abstract

The invention relates to the PVC material technology field, and concretely relates to a mildew-resistant PVC modified material and a preparation method therefor. The mildew-resistant PVC modified material comprises the following raw materials, by weight, 80-120 parts of PVC resin, 50-70 parts of plasticizer, 20-30 parts of filler, 3-7 parts of heat stabilizer, 1-3 parts of mildew inhibitor, 0.6-1.0 part of synergistic agent and 0.2-0.6 part of lubricant. The above raw materials are employed, the weight ratios of the raw materials are controlled strictly, various performances of the prepared mildew-resistant PVC modified material exceed national standards, and the provided modified material is advantaged by good mildew-resistant effects, environmental protection, excellent temperature resistance, excellent weather resistance, high intensity, excellent shock resistance, good flame retardation effects, excellent processing property and excellent comprehensive properties.

Description

technical field [0001] The invention relates to the technical field of PVC materials, in particular to a mildew-resistant 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 higher than 150°C, and the melting tem...

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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 above-mentioned existing PVC materials have poor anti-mold properties and cannot reliably meet the needs of long-term use under humid conditions. Therefore, it is particularly necessary to develop a anti-mold PVC material.