TH8147B - Vinyl chloride polymerization action - Google Patents

Abstract

The process was prepared for the polymerization of vinyl chloride in a closed method in accordance with the process. Oxygen is stabilized in the polymerizer. Coated With anti-fouling agents While operations where the polymerization is being repeated, the process corresponding to this invention provides the potential for an effect. That fully demonstrates the anti-fouling agent On the other hand, it also makes It is possible to polymerize successfully of vinyl chloride in a closed method leading to process improvement.

Claims (1)

1.Vinyl chloride polymerization process By operation The polymerization reaction is performed successfully in the polymer riser. (Polymerizer), which is coated with an anti-fulling agent. Where after the reaction to cause the polymer as Completed, slurry (slurry) will be released. And then perform the reaction Make the polymerization Without the opening of the polymerizer into the atmosphere, and while the vinyl chloride monomer remains in the gas cycle within the polymerizer. And where oxidation causes it to be present in the polymer riser 2. Process according to claim 1 where the polymerization is initiated. When oxygen is present in the polymerization system 10 to 1000ppm by weight based on vinyl chloride moromers put in the polymerization time 3. Any of the right to claim 1-2, which is the cause The oxygen is 300 to 10,000 parts per million by weight. In the gas cycle of poly Merrisers before during Or after the use of antifulling agents 4. Process according to one of the claims of 1-3 where the antifulling agent is the condensate of a compound with a phenolic hydroxide group. An antifulling agent is the self-condensate of a compound with a phenolic hydroxyl group 6. Process according to one of the claims 1 to 4, where an antifulling agent is a condensate between compounds containing phenolic hydroxyls and aldehydes. 7. Process according to one of the claims 1 to 3 where the antifulling agent is the joint condensate between the initial condensate of the phenol. Al and aldehyde and one or more modifiers selected from hindphenol. Polyhydric, phenol, or nitrogen-containing compounds 8. Process in accordance with one of the claims 1 to 4 where the antifulling agent is the hydroxy i-hydroxy condensate. Biphenyl and aldehyde 9. Process according to one of the claims 1 to 3 where the antifulling agent is a modified co-condensate obtained by the reaction. In the presence of strong acid catalysts The initial condensate between one or more phenols and at least one alkehyde other than formaldehyde. That contain at least one type of hinder phenol And at least one polyhydric phenol 1 0. Process by one of the claims 1 through 9 where vinyl chloride monomer is polymerized. Torsion in the medium of water Or in a bulk; And anti-fouling agents that were pre-applied in the form of formulations, ingredients, Liquid-to-polymer coating on the surface of these sections. Where vinyl chloride monomer May be brought to touch In order to obtain polyvinyl chloride polymer That may be prevented The pH of the liquid coating formulation is adjusted so that the Resists fouling in forms that are dissolved at the first temperature And at the time of application that is on the skin Face, but were left to gather When heated on the surface of the face 1 1. Process according to claim No. 10, where the surface temperature is increased to 40 to 100 ํ when a liquid coating ingredient formula is applied.