Transparent and environment-friendly PVC modified material and preparation method thereof

Abstract

The invention relates to the technical field of PVC (polyvinyl chloride) modified materials, in particular to a transparent and environment-friendly PVC modified material and a preparation method thereof. The modified material PVC resin comprises the following raw materials by weight: 80-120 parts of PVC resin, 60-100 parts of a plasticizer, 1-3 parts of a heat stabilizer, and 0.5-1.5 parts of a lubricant. The plasticizer is a mixture of dioctyl terephthalate and diisononyl cyclohexane-1, 2-dicarboxylate in a weight ratio of 2-4:1. The heat stabilizer is a mixture composed of (RCOO)2Ba and (RCOO)2Zn in a mole ratio of 1.4-2.2:1, wherein R is alkyl of C8-C24 or alkenyl of C6-C24. The material provided by the invention has high transparency, high light transmittance up to 93-95%, and is environment-friendly. The preparation method involved in the invention has the characteristics of simple process, convenient operation control, stable quality and high production efficiency, and can be used for large scale industrialized production.

Description

technical field [0001] The invention relates to the technical field of PVC modified materials, in particular to a transparent 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 higher t...

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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.

[0003] The global annual output of polyvinyl chloride is second only to polyethylene as a plastic raw material. It has been widely used in various fields of production and life. Among them, transparent products are also an important application field of polyvinyl chloride, which not only meets the requirements of product mechanics, flame retardancy and other properties. requirements, and increase the appearance of the product, but due to the application of other transparent materials, the market share of transparent PVC products is relatively small, so the study of a transparent and environmentally friendly PVC material has a good application prospect