The Production Process Of Vinyl Resin

Nov. 23, 2018

There are four methods for preparing Solution Vinyl Resin: bulk polymerization, emulsion polymerization, solution polymerization, and suspension polymerization. Suspension polymerization is the most important production method.

The production method of the Vinyl Resin is similar to the polyvinyl chloride homopolymer resin, and the selected initiator and dispersant system are basically the same, except that a monomer such as vinyl acetate is added. However, there are the following differences in production operations:

1. In the production process of Chemical Resistance Vinyl Resin, the reactivity ratio earlier than vinyl chloride is larger than that of vinyl acetate. In order to obtain copolymers of chloroacetic acid, the chloroacetic resin obtained by adding vinyl chloride in multiple steps is more than one feeding method. The resin obtained is much better. Because the content of vinyl acetate in the different polymerization stages of the former is more uniform than the latter. Colleagues have a higher price of vinyl acetate than vinyl chloride. The use of batchwise vinyl chloride helps reduce the amount of vinyl acetate, which can reduce the cost of resin production.

2. The particle characteristics of Vinyl Resin directly affect the quality of the product, especially ink production. Poor particle properties can lead to insoluble problems in the production process, and there is a thickening phenomenon when the product is placed for a certain period of time, which affects the performance. Therefore, a suitable dispersant is used to improve the solubility of the chloroacetate resin and improve the chloroacetate resin. Porosity and control of the particle size of the copolymer resin.

3. To control the molecular weight, vinyl acetate content and molecular weight distribution of the chloroacetic copolymer resin to improve the processing denaturation of the copolymer resin.

Firstly, the polymerization temperature is controlled, and the polymerization temperature is kept stable. The ratio of vinyl acetate and vinyl chloride to be added is controlled, and the ratio in the polymerization process is relatively constant as much as possible to obtain a product having a uniform copolymerized resin containing vinyl acetate.

Secondly, it is necessary to control the chain transfer between the active chain end and the monomer. For the copolymerization system, compared with the presence of vinyl acetate, the polymer has a high chain transfer coefficient from the end to the monomer, thereby lowering the molecular weight of the resin. And there is an increase in the impact of vinyl acetate. In addition, there is an increase in the influence of vinyl acetate.

Solution Vinyl Resin