Method for producing PVC resin and obtained resin

Abstract

The invention provides a method for producing PVC resin and the obtained resin. The production method adopts a suspension polymerization production process, and the production method comprises the following operations: S1, respectively adding a vinyl chloride (VCM) monomer and deionized water into a polymerization kettle, delaying for a certain time; S2, after a dispersant and an initiator are added, enabling the polymerization kettle to enter a reaction stage; S3, controlling the reaction process by a DCS, when a set reaction end point requirement is met, starting a terminator feeding system,automatically adding the terminator into the polymerization kettle, and finishing the polymerization reaction. Rare earth additives are added in a production process. According to the production method provided by the invention, the amount of the rare earth additives added into a PVC product is adjusted to produce resin products with different types and properties, other qualities of the productare unchanged, and the number of black and yellow spots is reduced; the light transmittance is not changed greatly, and the haze is obviously increased; the aging resistance of the resin added with the rare earth additives is higher; and the tensile strength is slightly higher than that of common resin, and the dynamic stability is better.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and in particular relates to a production method of a chlorine-containing polymer. Background technique [0002] Polyvinyl chloride (PVC) is one of the plastic products with the largest output in the world. PVC is a white powder with an amorphous structure, with a small degree of branching and a relative density of about 1.4. It is cheap and widely used, and is widely used in building materials, industrial products, daily necessities, pipes, packaging materials, foaming materials, sealing materials, etc. It can also be compounded with metal materials, such as building materials such as door and window structures for buildings, wall decorations, etc. Due to the excellent electrical insulation properties of PVC, it can be used in the manufacture of plugs, sockets, switches and cables in the electrical and electronic industries. [0003] Although PVC has a wide range of uses, there are also some p...

AI Technical Summary

Problems solved by technology

PVC has poor stability to light and heat. When it is above 100°C or exposed to sunlight for a long time, it will decompose to produce hydrogen chloride, and further autocatalyze the decomposition, causing discoloration and rapid decline in physical and mechanical properties.

The stability and whiteness of the material are relatively poor, which restricts the long-term performance of PVC.

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