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PVC (polyvinyl chloride) paste resin and preparation method thereof

A polyvinyl chloride paste and resin technology, applied in the field of paste resin and its preparation, can solve the problems of great difference, high paste viscosity, unstable product quality, etc., and achieve low paste viscosity, good foaming property, flow good sex effect

Active Publication Date: 2016-03-30
JIANGSU KANGNING CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the seed emulsion method, since the polyvinyl chloride monomer and emulsifier participating in the reaction are added to the polymerization tank according to the heat of reaction during the reaction process, the corresponding addition amount in the actual production process varies greatly among the tanks, resulting in product quality Unstable, and the paste viscosity of the product produced by the seed emulsion method is higher than that produced by the microsuspension method (see national standard)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: a kind of preparation method of polyvinyl chloride paste resin comprises the following steps:

[0023] (1) Make seeds: Add 10 tons of hot ion-free water at a temperature of 56°C to the seed emulsion polymerization kettle, then add 10 kg of buffering agent sodium bicarbonate and 1 kg of copper chloride solution with a concentration of 1% by mass; Vacuum, the vacuum degree is -0.095MPa, use negative pressure to suck 10kg sodium pyrosulfite and 1000g potassium persulfate into the polymerization kettle of seed emulsion method, and carry out aging, the aging temperature is 51 ℃; the aging time is 30 minutes; after aging Add 10 tons of vinyl chloride monomer to the seed emulsion polymerization kettle, keep the reaction temperature at 50°C, and continuously add 1.5kg of potassium persulfate and 60-70kg of emulsifier to the seed emulsion polymerization kettle according to the heat release of the polymerization reaction. Sodium Dialkyl Sulfate;

[0024] (2) Afte...

Embodiment 2

[0026] Embodiment two: a kind of preparation method of polyvinyl chloride paste resin comprises the following steps:

[0027] (1) Make seeds: Add 10 tons of hot ion-free water at a temperature of 56°C to the seed emulsion method polymerization kettle, then add 10 kg of sodium bicarbonate and 1 kg of copper chloride solution with a mass percent concentration of 1%; vacuumize, Vacuum degree is -0.095MPa, use negative pressure to suck 10kg sodium metabisulfite and 800g potassium persulfate into the polymerization kettle of seed emulsion method, and carry out aging. The aging temperature is 53°C; the aging time is 33 minutes; after aging, the seed emulsion Add 10 tons of vinyl chloride monomer to the polymerization kettle by the method of polymerization, keep the reaction temperature at 50°C, and continuously add 1.5kg of potassium persulfate and 60-70kg of emulsifier dodecane to the polymerization kettle by the seed emulsion method according to the heat release of the polymerizati...

Embodiment 3

[0030] Embodiment three: a kind of preparation method of polyvinyl chloride paste resin comprises the following steps:

[0031] (1) Make seeds: Add 10 tons of hot ion-free water at a temperature of 56°C to the seed emulsion method polymerization kettle, then add 10 kg of sodium bicarbonate and 1 kg of copper chloride solution with a mass percent concentration of 1%; vacuumize, The vacuum degree is -0.095MPa, and 10kg of sodium metabisulfite and 600-700g of potassium persulfate are sucked into the polymerization kettle of the seed emulsion method by negative pressure, and the aging is carried out. The aging temperature is 55°C; the aging time is 35 minutes; Add 10 tons of vinyl chloride monomer to the seed emulsion polymerization kettle, keep the reaction temperature at 50°C, and continuously add 1.5kg of potassium persulfate and 60-70kg of emulsifier to the seed emulsion polymerization kettle according to the heat release of the polymerization reaction. Sodium Dialkyl Sulfate;...

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Abstract

The invention relates to a PVC (polyvinyl chloride) paste resin and a preparation method thereof. The preparation method is characterized by comprising steps as follows: (1), deionized water, a buffering agent and an activating agent are added to a seed emulsion polymerization kettle, vacuum pumping is performed, and an oxidizing agent and a reducing agent are added for aging; vinyl chloride monomers are added after aging for polymerization reaction, and the reducing agent and emulsifiers are added; (2), fatty alcohol is added after the polymerization reaction, and seeds are obtained; (3), the seeds after dilution are added to a micro-suspension polymerization kettle with the deionized water, an initiator A, an initiator B, the vinyl chloride monomers, an emulsifier A and an emulsifier B; a finished PVC paste resin product is obtained through spray drying after reaction. According to the PVC paste resin and the preparation method thereof, the advantages of two production methods including a seed emulsion method and a micro-suspension method are combined, and the PVC paste resin is in two-peak distribution, has the characteristic of good foaminess of a seed emulsion product and has the characteristics of good liquidity and low paste viscosity of the micro-suspension method.

Description

technical field [0001] The invention relates to a paste resin and a preparation method thereof, in particular to a polyvinyl chloride paste resin and a preparation method thereof. Background technique [0002] At present, the mainstream production methods of polyvinyl chloride paste resin include seed emulsion method and microsuspension method, each of which has its own characteristics. The seed emulsion method is to add a certain amount of pre-prepared seeds when producing PVC paste resin products, and then mix them with fresh vinyl chloride monomer to form the final product. Due to the addition of seeds, the particle size distribution of the final product is bimodal structure. The micro-suspension method is to fully mix the vinyl chloride monomer and additives through a special dispersing pump during the production of PVC paste resin products, and then polymerize in a polymerization tank to obtain the final product. The particle size distribution of the final product has ...

Claims

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Application Information

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IPC IPC(8): C08F259/04C08F214/06C08F2/26C08F2/24
CPCC08F2/24C08F2/26C08F259/04C08F214/06
Inventor 赵海良王鹏
Owner JIANGSU KANGNING CHEM CO LTD
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