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A kind of high oil absorption rate polyvinyl chloride resin and preparation method thereof

A technology of polyvinyl chloride resin and high oil absorption, applied in chemical instruments and methods, and other chemical processes, can solve the problems of unfavorable environmental protection, difficult operation, etc., and achieve the effects of reduced migration, storage resistance, and good stability

Active Publication Date: 2021-06-25
HENAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of solvents is not good for environmental protection; the patent JP6271610 uses organic solvents to prepare high oil absorption PVC resins during the polymerization conversion rate of 40%-80%, which belongs to the addition of organic solvents during the reaction process, which is difficult to operate

Method used

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  • A kind of high oil absorption rate polyvinyl chloride resin and preparation method thereof
  • A kind of high oil absorption rate polyvinyl chloride resin and preparation method thereof
  • A kind of high oil absorption rate polyvinyl chloride resin and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Deionized water 12Kg, organic dispersant high degree of alcoholysis polyvinyl alcohol dispersant BR-60 4.8g, hydrophilic cellulose ether dispersant BR-4 2.4g, low degree of alcoholysis polyvinyl alcohol dispersant TCR-4040 2.4 g, 2 g of hydrophobic nano-silica with trimethylsilane modified on the surface, 4 g of initiator cumyl peroxide neodecanoate, and 4 g of pH regulator sodium bicarbonate were added into the reaction kettle, and nitrogen gas was introduced to replace the air. Then add 8Kg of vinyl chloride monomer, pre-stir for 30min, and heat up to 57°C for reaction. When the pressure in the reactor dropped by 0.1 MPa, 0.4 g of terminator diethylhydroxylamine was added, the reaction was completed, unreacted vinyl chloride monomer was removed, and then filtered and dried to obtain polyvinyl chloride resin with high oil absorption rate.

Embodiment 2

[0028] Deionized water 12Kg, organic dispersant high alcoholysis degree polyvinyl alcohol dispersant BR-60 4.8g, hydrophilic cellulose ether dispersant BR-4 2.4g, surface-modified hydrophobic nanometer dioxide of trimethyl silicon 2g of silicon, 4g of initiator cumyl peroxide neodecanoate, and 4g of pH regulator sodium bicarbonate were added into the reaction kettle, and nitrogen gas was introduced to replace the air. Then add 8Kg of vinyl chloride monomer, pre-stir for 30min, and heat up to 57°C for reaction. When the pressure in the reactor drops by 0.1 MPa, add 0.4 g of diethylhydroxylamine as a terminator, the reaction is completed, remove unreacted vinyl chloride monomer, and then filter and dry to obtain polyvinyl chloride resin with high oil absorption rate.

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Abstract

The invention belongs to the technical field of polyvinyl chloride, and in particular relates to a polyvinyl chloride resin with high oil absorption rate and a preparation method thereof. The preparation method includes the following steps: 1) adding deionized water, organic dispersant, nano-silica, initiator, and pH regulator into the polymerization kettle; 2) under the protection of inert gas, introducing vinyl chloride monomer , mix well, heat up to 55-59°C, when the pressure in the polymerization tank drops by 0.08-0.12MPa, add a terminator to obtain a reaction slurry; 3) remove unreacted vinyl chloride monomer, and then filter the reaction slurry , dry it. The present invention does not change the traditional polymerization process, is simple, easy, and environmentally friendly. It adopts a suspension polymerization method and adds a small amount of surface-modified hydrophobic nano-silica, so that the nano-silica is well dispersed in the VCM monomer oil droplets. In the process of polymerization, it prevents the aggregation of primary particles and improves the internal pore structure. The nano-silica in the resin particles can also absorb and stabilize the plasticizer, and significantly improve the oil absorption rate of the resin.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl chloride, and in particular relates to a polyvinyl chloride resin with high oil absorption rate and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) resin is one of the most important resins. Products made of PVC have good flame retardancy, plasticity, wear resistance, etc., and are widely used in daily production and life. There are many ways to produce polyvinyl chloride resin, among which the suspension method accounts for more than 80% of the total production of polyvinyl chloride resin because of its mild reaction conditions and easy control of the production process. [0003] The production of polyvinyl chloride resin by the suspension method is to disperse the vinyl chloride monomer (VCM) in water into monomer droplets and suspend them in water under the action of dispersant and stirring. The oil-soluble initiator can be dissolved in the monomer droplet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/44C08K9/06C08K3/36B01J20/26B01J20/30
CPCB01J20/261C08F2/44C08F114/06C08K3/36C08K9/06C08K2201/011
Inventor 李小红张治军魏庆渤吉同超田爱娟
Owner HENAN UNIVERSITY
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