PVC (Polyvinyl Chloride) paste resin and preparation method thereof

A technology of polyvinyl chloride paste resin and polyvinyl chloride paste, which is applied in the field of polyvinyl chloride paste resin and its preparation, and can solve the problems of affecting processing speed, increasing processing cost, and high viscosity of polyvinyl chloride paste resin

Active Publication Date: 2013-03-06
SHENYANG CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The polyvinyl chloride paste resin synthesized by the existing emulsion method has a high paste viscosity, and more plasticizers and diluents are introduced in the application process, which affects the mechanical properties of the product and increases the processing cost, and the paste resin products between batches The paste viscosities vary greatly, and the paste viscosity is not easy to control; the products with higher paste viscosity in the existing microsuspension polymerization paste resin have poor transparency and slow plasticizing speed, which affects the processing speed. Products with lower viscosity have poor defoaming performance, and the products produced have many pinholes, which affect the appearance and internal quality of the products, especially the mechanical properties of the products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Vinyl chloride 19000kg, pure water 20000kg, azobisisoheptanonitrile 1.56kg, sodium octylsulfonate succinate 280kg, sodium lauryl sulfate 20kg, C 12-20Fatty alcohol 200kg, diisopropyl peroxydicarbonate 1.7kg, triethanolamine 12kg, diallyl phthalate 10kg. Send the above-mentioned substances into the dispersion tank for dispersion, and add them to the vacuum-deoxidized polymerization kettle while dispersing to form stable fine droplets. The entire feeding time is completed within 50 minutes, and then fill the polymerization kettle with high-purity nitrogen to increase pressure to increase the pressure in the kettle by 0.1MPa, and start the polymerization reaction when the temperature rises to 50°C; control the polymerization temperature at about 50°C, when the pressure in the kettle drops by 0.1-0.5Mpa, the entire polymerization reaction time is 15 hours, and the solid content of the polymerized latex 45.9%. After the polymerization, add 10kg of octylphenol polyoxyethylen...

Embodiment 2

[0036] Vinyl chloride 19000kg, pure water 20000kg, azobisisobutyronitrile 1.60kg, C 12-20 Fatty alcohol 145kg, stearic acid 40kg, sodium tridecyl sulfonate succinate 280kg, sodium dodecylbenzenesulfonate 20kg, lauryl peroxide 1.5kg, diallyl phthalate Ester 16kg, buffer solution NaH2PO 4 -Na 2 HPO 4 21 kg. Send the above-mentioned substances into the dispersion tank for dispersion, and add them to the vacuum deoxidized polymerization kettle while dispersing to form stable fine droplets. The entire feeding time is completed within 45 minutes, and then fill the polymerization kettle with high-purity nitrogen to increase pressure to increase the pressure in the kettle by 0.1MPa, and start polymerization when the temperature rises to 55°C, and control the polymerization temperature at about 55°C; when the pressure in the kettle drops by 0.1-0.5Mpa), the entire polymerization reaction time is 11 hours, and the solid content of the polymerized latex is 46.3 %, after the polymeri...

Embodiment 3

[0038] Vinyl chloride 19000kg, pure water 20000kg, azobisisobutyronitrile 1.60kg, C 12-20 Fatty alcohol 145kg, stearic acid 40kg, sodium tridecyl sulfonate succinate 280kg, sodium dodecylbenzenesulfonate 20kg, lauryl alcohol polyoxyethylene ether 10kg, lauryl peroxide 1.8kg , ammonium bicarbonate 18kg. Send the above-mentioned substances into the dispersion tank for dispersion, and add them to the polymerization kettle that has been vacuum deoxidized while dispersing to form stable fine droplets. The entire feeding time is completed within 60 minutes, and then fill the polymerization kettle with high-purity nitrogen to increase pressure to increase the pressure in the kettle by 0.1MPa, the temperature rises to 45°C to start polymerization, and the polymerization temperature is controlled at about 45°C; when the pressure in the kettle drops by 0.1-0.5Mpa, the entire polymerization reaction time is 17 hours, and the solid content of the polymerized latex is 45.1%. After the pol...

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Abstract

The invention discloses PVC (Polyvinyl Chloride) paste resin and a preparation method thereof, belonging to the technical field of polymer chemical industry. Weighted in 100 parts by weight of vinyl chloride, the PVC paste resin with the average grain diameter of 0.5-2mum, the average degree of polymerization of 1600-1900 and the paste viscosity of 1500-3500mPa.s is prepared from the following components: 70-120 parts of deionized water, 0.5-5 parts of mixed emulsifier, 0.005-0.02 part of oil-soluble compound initiating agent, 0.05-0.5 part of pH value regulator and 0-0.1 part of chain extender through microsuspension polymerization. The paste resin prepared according to the invention has the advantages of high degree of polymerization, low paste viscosity, rapidness in plasticization, good transparency and favorable defoaming performance.

Description

technical field [0001] The invention belongs to the technical field of polymer chemical industry, in particular to a polyvinyl chloride paste resin and a preparation method thereof. Background technique [0002] PVC paste resin is a kind of polyvinyl chloride resin, which is usually made into plastisol for further processing. Plastisol is a unique liquid form of polyvinyl chloride plastic in its unprocessed state. Polyvinyl chloride plastic products can be obtained only through the heating process. [0003] PVC paste resins are usually prepared by emulsion and microsuspension methods. Widely used in dipping, rotational molding, coating, foaming and other processing, as the main raw material for the production of floor leather, wallpaper, disposable PVC inspection gloves, tarpaulin and so on. [0004] The polyvinyl chloride paste resin synthesized by the existing emulsion method has a high paste viscosity, and more plasticizers and diluents are introduced in the application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F218/18C08F114/06C08F2/18
Inventor 罗冬梅高素英梁晓臣李鑫曹爱军
Owner SHENYANG CHEM IND CO LTD
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