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Process for polymerization preparation of vinyl chloride/isobutyl vinyl ether copolyresin latex

A technology of isobutyl vinyl ether copolymer resin and isobutyl vinyl ether, which is applied in the field of preparation of vinyl chloride copolymer resin, can solve the problems of large amount of initiator and long polymerization time, and achieves solubility and thermal stability. Good, short response time, easy to control effect

Active Publication Date: 2005-03-16
HANGZHOU ELECTROCHEM GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early patents of emulsion copolymerization (such as USP 3741946), it was proposed to use stepwise addition of VC to synthesize a uniform chloroether resin, and to use low temperature (30-40°C) polymerization to improve the molecular weight and coating properties of the copolymer, but Since only the ammonium persulfate initiator with very low activity at the reaction temperature is used, the amount of the initiator is large and the polymerization time is long (24-30 hours).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1.5g of sodium dodecylbenzenesulfonate, 0.01g of sodium sulfite, and 1.0g of sodium bicarbonate into 100g of deionized water, stir and disperse, add 7.5g of isobutyl vinyl ether, 42.5g of vinyl chloride, and heat up to 45°C Then add 0.06g ammonium persulfate to start polymerization, finish polymerization after 6 hours of reaction, get 40.2g chloroether resin after demulsification and drying, the resin dissolves well in toluene, and the viscosity of the toluene solution with a resin concentration of 20% is 145.0mPa·s (the measuring instrument is a rotational viscometer, the test temperature is 23°C, the same below).

Embodiment 2

[0020] Add 1.5g of sodium lauryl sulfate, 0.01g of sodium sulfite, and 1.0g of sodium bicarbonate into 100g of deionized water, stir and disperse, add 15.0g of isobutyl vinyl ether, 45.0g of vinyl chloride, heat up to 45°C and add 0.06g of ammonium persulfate starts to polymerize, and the reaction ends after 7 hours. After demulsification and drying, 51.3g of chloroether resin is obtained. The resin dissolves well in toluene, and the viscosity of the toluene solution with a resin concentration of 20% is 95.2mPa·s.

Embodiment 3

[0022] Add 3.5g sodium dodecylbenzenesulfonate, 0.015g sodium sulfite, and 1.0g sodium bicarbonate into 100g deionized water, stir and disperse, add 20.0g isobutyl vinyl ether, 40.0g vinyl chloride, and heat up to 45°C Then add 0.075g ammonium persulfate to start polymerization, finish polymerization after reacting for 8 hours, obtain 52.4g chloroether resin after demulsification and drying, the resin dissolves well in toluene, and the viscosity of the toluene solution with a resin concentration of 20% is 44.8mPa·s .

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PUM

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Abstract

The invention discloses a process for polymerization preparation of vinyl chloride / isobutyl vinyl ether copolyresin latex which consists of, subjecting 65-85 parts of chloroethylene and 15-35 parts of isobutylvinyl ether monomer to emulsifier-containing, water-soluble redox initiation system and aqueous phase of pH regulator for polymerization 2-12 hours, wherein the polymerization temperature being 35-65 deg. C.

Description

technical field [0001] The invention relates to the preparation of vinyl chloride copolymer resin, in particular to a preparation method of emulsion polymerization of vinyl chloride / isobutyl vinyl ether copolymer resin. Background technique [0002] Vinyl chloride / isobutyl vinyl ether (VC / IBVE) copolymer resin, referred to as chloroether resin, is a binder resin with excellent comprehensive performance for coatings and inks. It can be dissolved in many solvents, including aromatics commonly used in coating production. Hydrocarbon and ester solvents; miscible with alkyd resins, acrylic resins, drying oils, tars, pitches and plasticizers; it has high resistance to saponification and is very stable due to the combined chlorine atoms, making the coatings Water resistance and chemical corrosion resistance, its anti-corrosion ability is 2 to 3 times that of ordinary anti-corrosion coatings; at the same time, because this type of resin does not contain reactive double bonds, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F4/40C08F214/20
Inventor 包永忠张照龙孔万力储卫平黄志明翁志学
Owner HANGZHOU ELECTROCHEM GROUP
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