Low-temperature-resistant flame-retardant PVC (Polyvinyl Chloride) material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of PVC (Polyvinyl Chloride) materials, and in particular relates to a low-temperature-resistant flame-retardant PVC material as well as a preparation method and application thereof. The low-temperature-resistant flame-retardant PVC material comprises the following raw materials in parts by weight: 50-100 parts of PVC resin, 40-100 parts of a plasticizer, 10-30 parts of a flame retardant, 5-30 parts of a low-temperature modifier, 1-5 parts of a heat stabilizer, 0.5-5 parts of a compatilizer and 0.02-0.1 part of an antioxidant. According to the PVC material disclosed by the invention, the previous raw materials are adopted, the weight ratio of the various raw materials is strictly controlled, the prepared PVC material has excellent low temperature resistance, the glass transition temperature of less than -50 DEG C, excellent flame retardant effect and high strength, also has excellent flexibility at the temperature -60 DEG C (the elongation at break at the temperature -60 DEG C and the change rate under the normal temperature condition do not exceed + / -25), and is excellent in overall performance.

Description

technical field [0001] The invention relates to the technical field of PVC materials, in particular to a low-temperature-resistant and flame-retardant PVC material and its preparation method and application. 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...

AI Technical Summary

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.

However, in the process of its processing, a large amount of additives are often added to improve the processing performance and softness of the material, and the additives are generally flammable, and a large amount of additives will greatly reduce the flame retardancy of soft PVC.

Moreover, the low temperature resistance that the existing PVC materials can withstand is only between -10 and -30°C, and cannot withstand low temperatures exceeding -30°C, and the existing PVC materials are easily brittle under low temperature conditions, and are less flexible at low temperatures. Difference