Polyvinyl acetate-cyanoethyl etherate and synthesis method thereof

A technology of polyvinyl acetate and cyanoethyl ether, which is applied in the field of cyanoethyl ether compound and its synthesis, can solve the problems of unfavorable purification and separation, poor thermal stability, low degree of substitution, etc., so as to reduce production cost and improve bonding performance Strong, less dosage effect

Active Publication Date: 2015-12-16
TIANJIN YISEN MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Soviet patent SU509607 "Preparation method of cyanoethyl ether polymer containing vinyl alcohol ring", the disadvantage of this method is that it adopts a one-step reaction method, and the obtained polyvinyl alcohol-β-cyanoethyl ether has low purity and low degree of substitution , product performance does not meet the target
Patent CN1528799A reports that polyvinyl alcohol is used as a raw material to directly prepare polyvinyl alcohol-β-cyanoethyl ether by acrylonitrile etherification reaction under alkali catalysis, and the product has high purity. However, since this synthesis method is a heterogeneous synthesis reaction, Resulting in extremely limited degree of substitution an

Method used

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Examples

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Example Embodiment

[0017] The following further explains based on specific examples:

[0018] To produce polyvinyl acetate-cyanoethyl etherate with a degree of substitution of 85%, the mass fraction ratio of various raw materials is,

[0019] Polyvinyl acetate with a degree of polymerization of 1700: 600g,

[0020] Deionized water: 400g,

[0021] Bayer 1341 water-based dispersant: 20g,

[0022] Acrylonitrile: 720g,

[0023] 10% sodium hydroxide aqueous solution: 15g,

[0024] Tetrabutylammonium bromide phase transfer catalyst: 86.75g.

[0025] The synthesis steps are,

[0026] (1) Put 600g of polyvinyl acetate with a degree of polymerization of 1700 and 400g of deionized water into a four-necked flask equipped with a stirrer, a thermometer and a reflux condenser and place it in a constant temperature water area. The temperature is raised to 63°C, and then Bayer 1341 is added. 20g water-based dispersant, stir evenly, stirring speed is 800 rpm, time 1h;

[0027] (2) After all dissolving, the temperature is redu...

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PUM

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Abstract

The invention relates to a polyvinyl acetate-cyanoethyl etherate and a synthesis method thereof. The synthesis method comprises the following steps: uniformly mixing polyvinyl acetate with an aqueous dispersant; adding acrylonitrile and a corresponding phase transfer catalyst according to a certain ratio; under the catalystic action of a strong alkaline solution, conducting an etherification modification reaction on polyvinyl acetate; carrying out crude product purification treatment such as precipitation and filtration to synthesize the polyvinyl acetate-cyanoethyl etherate with high viscosity, permittivity and hydrophobicity. The synthesis method has the technical effects that the efficiency of the etherification reaction is improved, the consumption of acrylonitrile is greatly lowered, and the production cost is reduced; the synthesized polyvinyl acetate-cyanoethyl etherate is high in bonding property, has the advantages that the degree of substitution can reach 60-97%, the highest permittivity value is 21-22, and the dielectric loss is lower than or equal to 0.002, and serves as an upgrade product of the conventional dielectric film-forming material.

Description

technical field [0001] The invention relates to a cyanoethyl ether compound and a synthesis method thereof, in particular to a polyvinyl acetate-cyanoethyl ether compound and a synthesis method thereof. Background technique [0002] Cyanoethyl ether, an organic dielectric material, has the properties of high dielectric constant and low dielectric loss. It can enhance the adhesion to glass and other bonding surfaces and has broad application prospects. Soviet patent SU509607 "Preparation method of cyanoethyl ether polymer containing vinyl alcohol ring", the disadvantage of this method is that it adopts a one-step reaction method, and the obtained polyvinyl alcohol-β-cyanoethyl ether has low purity and low degree of substitution , product performance does not meet the target. Patent CN1528799A reports that polyvinyl alcohol is used as a raw material to directly prepare polyvinyl alcohol-β-cyanoethyl ether by acrylonitrile etherification reaction under alkali catalysis, and t...

Claims

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Application Information

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IPC IPC(8): C08F118/08C08F8/30
Inventor 吴如森张俊玲
Owner TIANJIN YISEN MATERIAL TECH CO LTD
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