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Castor oil-based hydroxyl acrylate emulsion as well as preparation method and application thereof

A technology of oil-based hydroxy acrylate and methyl methacrylate, applied in the field of castor oil-based hydroxy acrylate emulsion and its preparation, can solve the problems of poor water resistance, inability to 2K water-based polyurethane, low carbon-carbon double bond reactivity, and the like, Achieve the effects of good emulsion stability, high strength and excellent film-forming properties

Pending Publication Date: 2022-02-01
XIAMEN SUNRUI SHIP COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the castor oil-based waterborne polyurethanes prepared in these studies are all one-component, and their water resistance is worse than that of 2K waterborne polyurethanes.
Although the castor oil structure contains hydroxyl and carbon-carbon double bonds, its carbon-carbon double bonds cannot carry out emulsion polymerization to obtain castor oil-based hydroxyacrylate emulsion and prepare 2K waterborne polyurethane due to low reactivity

Method used

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  • Castor oil-based hydroxyl acrylate emulsion as well as preparation method and application thereof
  • Castor oil-based hydroxyl acrylate emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of castor oil-based vinyl monomer:

[0040] Add 95.8g N,N-hydroxyethylacrylamide, 300g castor oil, 240g tetrahydrofuran, 2g sodium hydroxide powder and 0.2g 2,6-dimethylphenol into a 500ml four-necked flask, assemble a spherical condenser, After the argon gas inlet, mechanical stirrer and dropping funnel, the flask was placed in a constant temperature water bath at 40°C for 4 hours and stirred continuously at a speed of 350r / min.

[0041] (2) The reaction liquid was cooled to room temperature, and 240 g of dichloromethane was added to the obtained clear liquid for dilution, and then 312 g of saturated saline was added to wash the mixed liquid, and by-products in the mixed liquid were removed by extraction to obtain a supernatant liquid.

[0042] (3) Add an excessive amount of anhydrous magnesium sulfate to the supernatant to remove moisture in the supernatant. After the anhydrous magnesium sulfate was removed by filtration, the remaining clear liquid was pl...

Embodiment 2

[0059] Preparation of castor oil-based vinyl monomer:

[0060] The castor oil-based vinyl monomer prepared in Example 1 was used.

[0061] Preparation of castor oil-based hydroxyacrylate emulsion:

[0062] (1) Add 40g castor oil vinyl monomer, 53g methyl methacrylate, 5g butyl acrylate, 2g acrylic acid, 0.4g sodium bicarbonate, 3g SDS, 0.8g APS and 60g water in a 500ml four-necked flask, Equipped with a mechanical stirrer, stirred at 350r / min for 30min to obtain a pre-emulsion.

[0063] (2) In another 500ml four-necked flask, add 1.5g SDS, 60g water, 0.2g sodium bicarbonate and 10g pre-emulsion and mix, after assembling spherical condenser, nitrogen inlet, mechanical stirrer and dropping funnel, put The flask was placed in a constant temperature water bath at 80°C and stirred continuously at a speed of 500r / min. The mixture of 0.4g APS and 15g water was continuously added dropwise to the mixed solution through the dropping funnel to carry out the first stage of emulsion pol...

Embodiment 3

[0070] Preparation of castor oil-based vinyl monomer:

[0071] The castor oil-based vinyl monomer prepared in Example 1 was used.

[0072] Preparation of castor oil-based hydroxyacrylate emulsion:

[0073] (1) Add 35g castor oil vinyl monomer, 53g methyl methacrylate, 10g butyl acrylate, 2g acrylic acid, 0.4g sodium bicarbonate, 3g SDS, 0.8g APS and 60g water in a 500ml four-necked flask, Equipped with a mechanical stirrer, stirred at 350r / min for 30min to obtain a pre-emulsion.

[0074] (2) In another 500ml four-necked flask, add 1.5g SDS, 60g water, 0.2g sodium bicarbonate and 10g pre-emulsion and mix, after assembling spherical condenser, nitrogen inlet, mechanical stirrer and dropping funnel, put The flask was placed in a constant temperature water bath at 80°C and stirred continuously at a speed of 500r / min. The mixture of 0.4g APS and 15g water was continuously added dropwise to the mixed solution through the dropping funnel to carry out the first stage of emulsion po...

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Abstract

The invention relates to the technical field of chemical materials, in particular to a castor oil-based hydroxyl acrylate emulsion and a preparation method and application thereof, wherein castor oil is adopted as a raw material, and a castor oil-based vinyl monomer is synthesized through ester exchange reaction. The vinyl monomer contains hydroxyl and active carbon-carbon double bonds, and by utilizing the reaction characteristics of the active carbon-carbon double bonds, the monomer is used as a raw material to carry out emulsion polymerization to obtain the castor oil-based hydroxyl acrylate emulsion. Hydroxyl groups in the castor oil-based hydroxyl acrylate structure and isocyanate groups in a curing agent are subjected to condensation polymerization, and a paint film with certain mechanical strength is further obtained. Results show that the average particle size of the obtained castor oil-based water-based hydroxyl acrylate emulsion is 27-52.1 nm, the storage stability is more than 6 months, and the emulsion can be used as a resin part of a 2K water-based polyurethane coating, is applied to the fields of decks, wind power blades and the like, and has important practical application value.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a castor oil-based hydroxyacrylate emulsion and its preparation method and application. Background technique [0002] With the increasingly stringent international and domestic environmental policies, no pollution, low energy consumption and sustainability have become important development concepts for the coatings industry. Castor oil-based hydroxyacrylate emulsion can be used as the resin part of 2K polyurethane emulsion to improve the flexibility of 2K waterborne polyurethane film. At the same time, it also has pollution-free, non-toxic, good biocompatibility, and wide source of raw materials, renewable, etc. It has great application prospects in the coating fields such as decks and wind power blades. [0003] In recent years, some coatings in fields such as decks and wind turbine blades have gradually become water-based and have developed rapidly. For water-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/14C08F220/18C08F220/06C09D175/04
CPCC08F289/00C09D175/04C08F220/14C08F220/1804C08F220/06
Inventor 孟林龙李至秦叶维维李陈郭
Owner XIAMEN SUNRUI SHIP COATING
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