Modified vinyl ester resin and preparation method thereof, toughened and modified vinyl ester resin with good air-drying property, and preparation method and application of toughened and modified vinyl ester resin

A vinyl ester resin, toughening modification technology, applied in the field of vinyl ester resin and preparation, to achieve the effects of increasing toughness, reducing gel rate and increasing molecular weight

Active Publication Date: 2021-07-23
SOUTH CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is still a lack of a vinyl ester resin with good toughness and air-drying properties in the prior art

Method used

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  • Modified vinyl ester resin and preparation method thereof, toughened and modified vinyl ester resin with good air-drying property, and preparation method and application of toughened and modified vinyl ester resin
  • Modified vinyl ester resin and preparation method thereof, toughened and modified vinyl ester resin with good air-drying property, and preparation method and application of toughened and modified vinyl ester resin
  • Modified vinyl ester resin and preparation method thereof, toughened and modified vinyl ester resin with good air-drying property, and preparation method and application of toughened and modified vinyl ester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the modified vinyl ester resin of the present embodiment may further comprise the steps:

[0032] In the reactor, drop into 47g bisphenol A type epoxy resin E-44 (epoxy equivalent 227.27), 16g acrylic acid, the polymerization inhibitor hydroquinone of raw material gross mass 0.028%, stir at 45 ℃, then slowly Drop into 7g toluene diisocyanate, the catalyst dibutyltin dilaurate of 0.1% of raw material gross mass, be heated up to 70 ℃ and react, react 2h, add the catalyst benzyltriethylammonium chloride of raw raw material gross mass 0.6% afterwards, and heat up to React at 110°C until the acid value drops below 15mgKOH / g, then lower the temperature to 80°C, add 30g of active diluent styrene, until the mixture is uniform, and a light yellow transparent vinyl ester resin is obtained.

[0033] The Nicolet iS10 Fourier Transform Infrared Spectrometer of Thermo Fisher was used to monitor and analyze the functional groups in real time during the synthe...

Embodiment 2

[0036] The preparation method of the modified vinyl ester resin of the present embodiment may further comprise the steps:

[0037] (1) In the reactor, drop into 49g bisphenol A type epoxy resin E-44 (epoxy equivalent 227.27), 15g acrylic acid, the polymerization inhibitor hydroquinone of raw material gross mass 0.028%, stir at 45 ℃ , then slowly drop into 5g toluene diisocyanate, catalyzer dibutyltin dilaurate of 0.1% of the total mass of raw materials, be warming up to 70°C for reaction, react for 2h, then add benzyltriethylammonium chloride and benzyltriethylammonium chloride of 0.6% of the total mass of raw materials 1g of fumaric acid, stir until fully dissolved, heat up to 110°C for reaction until the acid value drops below 15mgKOH / g, then lower the temperature to 80°C, add 30g of reactive diluent styrene, until the mixture is uniform, and a light yellow color is obtained Transparent vinyl ester resin.

[0038] The same analysis method as in Example 1 was used to monitor a...

Embodiment 3

[0040] The preparation method of the toughened and modified vinyl ester resin with good air-drying property of the present embodiment comprises the following steps:

[0041] (1) Under the environment of nitrogen protection, drop into 30g of toluene diisocyanate and 45g of castor oil in the reactor and mix evenly, heat up to 45°C for 3h, then add 25g of hydroxyethyl acrylate, 0.1% of the total mass of raw materials Catalyst II Dibutyltin laurate and 0.1% of the total mass of raw materials as a polymerization inhibitor hydroquinone were heated up to 78° C. for 4 hours and stirred evenly to obtain a clear and transparent castor oil-based urethane acrylate resin.

[0042] (2) In another reactor, drop into 47g bisphenol A type epoxy resin E-44 (epoxy equivalent 227.27), 16g acrylic acid, the stopper hydroquinone of raw material gross mass 0.028%, at 45 ℃ Stir evenly, then slowly add 7g of toluene diisocyanate, a catalyst of 0.1% of the total mass of raw materials, dibutyltin dilaur...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to modified vinyl ester resin and a preparation method thereof, toughened and modified vinyl ester resin with good air-drying property, and a preparation method and application thereof. The preparation method comprises the following steps: carrying out chain extension reaction on epoxy resin and diisocyanate in the presence of a catalyst, reacting unsaturated monobasic acid with an epoxy group, and adding a reactive diluent after the reaction is completed to obtain modified vinyl ester resin; and mixing the plant oil-based oligomer with the modified vinyl ester resin in proportion to obtain the toughened and modified vinyl ester resin with good air-drying property. The modified vinyl ester resin and the toughened and modified vinyl ester resin with good air-drying property not only have good air-drying property and high curing speed, but also have excellent mechanical properties and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a modified vinyl ester resin and a preparation method thereof, a toughened modified vinyl ester resin with good air-drying property, a preparation method and an application thereof. Background technique [0002] Vinyl ester resin is usually obtained by ring-opening addition reaction of epoxy resin and monobasic unsaturated carboxylic acid, and then dissolved in unsaturated active monomer. From the structural point of view, since the double bond participating in free radical curing is located at the end of the molecular chain segment, its curing activity is high and it is easy to form a mold; secondly, the commonly used epoxy resin has a bisphenol A structure, and the main chain has more rigidity. Benzene ring structure, so its cured film has high tensile strength. However, the vinyl ester resin prepared by the above method has brittleness problems, low elon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/17C08G18/58C08L63/10C08L75/14C08L91/00
CPCC08G59/1466C08G18/58C08L63/10C08L75/14C08L91/00
Inventor 杨卓鸿李贵东方亨杨绍恒吴海华
Owner SOUTH CHINA AGRI UNIV
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