Polyvinyl chloride paste resin used for preparing bottle caps and method for producing same

A technology of polyvinyl chloride and paste resin, applied in bottle/container caps, capping containers with caps, applications, etc., can solve the problems of low vinyl chloride residue, high degree of polymerization, high vinyl chloride residue, etc.

Active Publication Date: 2010-06-16
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is a very complicated process to be used in the polymerization process. Different raw material ratios and preparation processes will lead to polyvinyl chloride paste resins with greatly different properties. Some PVC paste resins can only be used for building materials, and some can only be used to prepare gloves
[0004] The polyvinyl chloride paste resin used to prepare bottle caps requires a higher degree of polymerization and lower vinyl chloride residues, while the common polyvinyl chloride paste resin disclosed above generally has a degree of polymerization of 1000-1600, chlorine The residual amount of ethylene is relatively high, generally 5-10mg / kg, which cannot meet the needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of seeds:

[0027] The mixture of the water of 12000 parts by weight, the buffering agent sodium bicarbonate of 5 parts by weight, the activator cupric chloride solution of 0.8 parts by weight, the partial sodium metabisulfite of 11 parts by weight, the catalyst-1 potassium persulfate of 0.6 parts by weight at 48 Aging at ℃ for 0.5 hours, then adding vinyl chloride monomer to react, the reaction temperature is? ° C, in the first 20 minutes, the feed rate was 3800 parts by weight / h, and the temperature was lowered to 50 ° C;

[0028] Then continuously add 3 parts by weight of Catalyst-II potassium persulfate to the end of the reaction, and at the same time continuously add the remaining amount of vinyl chloride monomer. , then add the emulsifier sodium lauryl sulfate of 70 parts by weight, react to when temperature rises sharply, pressure is constant or descends, and reaction finishes, then adds the lauryl alcohol of 10 parts by weight to obtain seed, an...

Embodiment 2

[0038] (1) Preparation of seeds:

[0039] The mixture of the water of 13000 parts by weight, the buffering agent sodium bicarbonate of 6 parts by weight, the activator cupric chloride solution of 0.9 parts by weight, the partial sodium metabisulfite of 10 parts by weight, the catalyst-1 potassium persulfate of 0.7 parts by weight at 47 Aging at ℃ for 0.6 hours, then adding vinyl chloride monomer to react, the reaction temperature is? °C, in the first 30 minutes, the feed rate was 4200 parts by weight / h, and the temperature was lowered to 51 °C;

[0040] Then continuously add 2 parts by weight of Catalyst-II potassium persulfate to the end of the reaction, and at the same time continuously add the remaining amount of vinyl chloride monomer, the flow rate of the remaining amount of vinyl chloride monomer is based on controlling the temperature of the reaction system as 49 ° , then add the emulsifier sodium lauryl sulfate of 70 parts by weight, react to when temperature rises sh...

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Abstract

The invention provides polyvinyl chloride paste resin used for preparing bottle caps and a method for producing the same. The method for preparing the polyvinyl chloride paste resin comprises the following steps of: mixing water, an activating agent, sodium metabisulfite and seeds, adding monomers of vinyl chloride into the mixture for reaction, and when the temperature of the mixture is between 44 and 48 DEG C, continuously adding a catalyst until the reaction is ended; and controlling the speed of feeding the remained monomers of vinyl chloride so as to keep the temperature of the reaction system between 41 and 44 DEG C, adding an emulsifying agent when the reaction temperature is between 42 and 44 DEG C, and when the temperature sharply rises and the pressure is unchanged or drops, namely the reaction is ended, adding polyoxyethylene lauric acid ester into the mixture to obtain the finished product, wherein the grain size of the finished product is 0.2 to 1.3mu m, and the distribution of the grain size is uniform. In the method, the polymerization degree is improved by lowering the temperature of the polymerization reaction and the level of residue of the polyvinyl chloride is lowered by prolonging the recovery time, so that the production requirement of the polyvinyl chloride paste resin which is the special material used for producing the bottle caps is met.

Description

technical field [0001] The invention relates to a production method of polyvinyl chloride paste resin. Background technique [0002] Polyvinyl chloride paste resin is a kind of polymer with monomer vinyl chloride as the starting material and initiated by an initiator. It has a very wide range of applications in various fields. [0003] It is a very complicated process to be used in the polymerization process. Different raw material ratios and preparation processes will lead to polyvinyl chloride paste resins with greatly different properties. Some PVC paste resins can only be used for building materials, and some can only be used to make gloves. [0004] The polyvinyl chloride paste resin used to prepare bottle caps requires a higher degree of polymerization and lower vinyl chloride residues, while the common polyvinyl chloride paste resin disclosed above generally has a degree of polymerization of 1000-1600, chlorine The residual amount of ethylene is relatively high, ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/06C08F2/24C08F6/14B65D41/00
Inventor 陈善琴耿震张岷刘佳俞昉
Owner SHANGHAI CHLOR ALKALI CHEM
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