Narrow molecular weight distribution chloroether resin and preparation method thereof

A narrow molecular weight distribution, chloroether resin technology, applied in the field of chloroether resin and its preparation, can solve the problems of adverse effects on quality and application performance, poor resin compatibility, large difference in reactivity ratio, etc., and achieves color development ability. Better, stable response, good thermal stability

Active Publication Date: 2018-12-18
杭州电化新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Vinyl chloride and isobutyl vinyl ether belong to binary free radical copolymerization, and the reactivity ratios of vinyl chloride and isobutyl vinyl ether are quite different. wide, have adverse effects on produc

Method used

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  • Narrow molecular weight distribution chloroether resin and preparation method thereof

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preparation example Construction

[0025] A kind of preparation method of the chloroether resin of narrow molecular weight distribution, comprises the steps:

[0026] The raw materials include: 1.5-3 dodecyl sodium salt, 2.5-7 isobutyl vinyl ether, 0.4-0.9 persulfate, 2.5 dodecyl sodium sulfate, 1.25-2.15 buffer, 65- 80 vinyl chloride, 17.5-35 isobutyl vinyl ether;

[0027] Step 1: Add deionized water, sodium lauryl sulfate, part of the buffer, and isobutyl vinyl ether into the polymerization kettle, and stir; the amount of the part of the buffer is in the range of 0-1 / 3 of the total amount of the buffer.

[0028] Step 2, heat up to 54°C, add ammonium persulfate, and start to continuously drop the mixture consisting of deionized water, sodium lauryl sulfate, the remaining buffer, vinyl chloride and isobutyl vinyl ether, reaction 5 -6 hours; the reaction process controls the temperature and pressure to be constant. It should be noted that the pressure during the reaction is controlled at 0.45±0.05MPa, and the ...

Embodiment 1

[0032] Add 150g deionized water, 1.5g sodium lauryl sulfate, 0.25g sodium sulfite, 0.3g ammonia water and 2.5g isobutyl vinyl ether into the polymerization kettle, stir, raise the temperature to 54°C, add 0.8g ammonium persulfate, And start to drop continuously the mixture that is made up of 50g deionized water, 2.5g sodium lauryl sulfate, 1.2g ammoniacal liquor, 75g vinyl chloride and 17.5g isobutyl vinyl ether, react 5 hours, reaction process control temperature, pressure Constant, and after heat preservation and pressure reduction, stop polymerization, recovery, demulsification, washing, dehydration, and drying to obtain chloroether resin. The measured viscosity of the 20% toluene solution was 40 mPa.s.

Embodiment 2

[0034] Add 150g of deionized water, 1.5g of sodium lauryl sulfate, 0.35g of sodium bisulfite, 0.2g of sodium hydroxide and 2g of isobutyl vinyl ether into the polymerization kettle, stir, raise the temperature to 45°C, and add 0.9g Potassium persulfate, and start to drop continuously the mixture that is made up of 50g deionized water, 2.5g sodium lauryl sulfate, 0.7g sodium hydroxide, 80g vinyl chloride and 18g isobutyl vinyl ether, react for 6 hours, react The process controls the temperature and pressure to be constant, and after heat preservation and pressure reduction, the polymerization is stopped, and the chloroether resin is obtained after recovery, demulsification, washing, dehydration, and drying. The measured viscosity of the 20% toluene solution was 55 mPa.s.

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Abstract

The invention discloses a narrow molecular weight distribution chloroether resin and a preparation method thereof. The narrow molecular weight distribution chloroether resin comprises, by mass, 1.5-3parts of a dodecyl sodium salt, 2.5-7 pats of isobutyl vinyl ether, 0.4-0.9 parts of a persulfate, 2.5 parts of sodium dodecyl sulfate, 1.25-2.15 parts of a buffer agent, 65-80 parts of vinyl chlorideand 17.5-35 parts of isobutyl vinyl ether. The preparation method comprises: adding a part of isobutyl vinyl ether into a polymerization reactor, reducing a use amount of a buffer agent in the polymerization reactor to 0-1/3 the total use amount of the buffer agent and carrying out a reaction process under constant temperature and constant pressure control to obtain chloroether resin. The chloroether resin has narrow molecular weight distribution, contains regular particles and has a loose structure and good processing properties. The preparation method has the advantages of stable reaction,easy control, large polymerization rate, short reaction time and low raw material cost.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a chloroether resin and a preparation method thereof. Background technique [0002] Vinyl chloride-isobutyl vinyl ether copolymer resin, referred to as chloroether resin for short, is a kind of linking resin for coatings and inks with excellent comprehensive properties, which can be dissolved in many solvents, including aromatic hydrocarbons and ester solvents commonly used in coating production; Compatible with alkyd resins, acrylic resins, drying oils, tars, bitumens and plasticizers. Chloroether resin has good adhesion to various substrates, and can play a good protective role on steel, zinc, aluminum and other metal surfaces. Therefore, chloroether resin is widely used as surface anti-corrosion coatings for marine components and high-performance video Materials Substrates, inks, adhesives. [0003] Vinyl chloride and isobutyl vinyl ether belong to binary free radical copol...

Claims

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Application Information

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IPC IPC(8): C08F214/06C08F216/18
CPCC08F214/06C08F216/18
Inventor 刘森孙熊杰陈浙周杰王光军万波蒋军丰
Owner 杭州电化新材料有限公司
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