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Hyperbranched polyester modified itaconic acid-based water-based photocurable resin and preparation method thereof

An itaconic acid-based water-based, hyperbranched polyester technology, applied in polyester coatings, coatings, etc., can solve the problems of decreased flexibility, loss of green environmental protection of light-curing coatings, poor resin flexibility and poor light-curing speed

Active Publication Date: 2020-05-26
HUARONG COUNTY HENGXING BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexibility and photocuring speed of the resin obtained by this method are not good.
[0008] CN107090240A discloses a kind of preparation method of photocurable itaconic acid modified alkyd resin coating, but, the alkyd resin obtained by this method has the defect that coating film hardness is not high, and because the existence of organic solvent, has lost the photocurable coating. Advantages of being green
[0009] Therefore, in the existing itaconic acid-based water-based photocurable resin preparation technology, there is generally a problem that the photocuring speed and resin flexibility cannot be balanced. Although the presence of too much itaconic acid can speed up the photocuring speed, the flexibility decreases.

Method used

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  • Hyperbranched polyester modified itaconic acid-based water-based photocurable resin and preparation method thereof
  • Hyperbranched polyester modified itaconic acid-based water-based photocurable resin and preparation method thereof
  • Hyperbranched polyester modified itaconic acid-based water-based photocurable resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] The preparation method reference example 1 of the second generation molecule of type polyester polyol

[0062] Mix 6.8g of pentaerythritol (0.05mol), 82.1g of dimethylolpropionic acid (98% by mass, 0.6mol) and 0.4g of p-toluenesulfonic acid in a three-necked flask, under nitrogen protection, at 130°C , after heating and reacting for 1 hour, at 130°C and a vacuum of 0.03MPa, heat-preserve and reduce pressure to react until no more water comes out and stop the reaction. Add 200g of n-hexane to the obtained product for precipitation, washing and purification for 3 times, and at 80°C and a vacuum of 0.06MPa Under vacuum drying for 1 hour, the second-generation molecule of Boltorn type polyester polyol was obtained.

[0063] Hyperbranched polyester modified itaconic acid-based water-based photocurable resin Examples 1-5 and comparative example 1 itaconic acid-based water-based UV resin

[0064] The parts by weight of each raw material are as shown in Table 1:

[0065] Tabl...

Embodiment 1

[0070] (1) According to the raw materials and dosage of Example 1 in Table 1, put itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, esterification catalyst and polymerization inhibitor in a three-necked bottle Mixing, under the protection of nitrogen, at 130 ° C, after heating reaction for 1 hour, at 130 ° C, 0.02 MPa vacuum degree, heat preservation and decompression reaction until no water comes out and stop the reaction, after cooling to room temperature, the precondensed polymer is obtained;

[0071] (2) Add a polycondensation catalyst and a stabilizer to the precondensed polymer obtained in step (1), and conduct a reaction under reduced pressure and heating for 4 hours at 140°C and a vacuum of 0.09MPa. After cooling down to 80°C, add a neutralizer to adjust the pH value to 7.0, and finally add water to adjust the solid content to 80% to obtain a hyperbranched polyester modified itaconic acid-based water-based photocurable resin.

[0072] Such ...

Embodiment 2

[0074] (1) According to the raw materials and dosage of Example 2 in Table 1, put itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, esterification catalyst and polymerization inhibitor in a three-necked bottle Mix, under the protection of nitrogen, at 120°C, conduct heating reaction for 1.5h, then at 120°C, 0.03MPa vacuum degree, heat preservation and decompression reaction until no water comes out and stop the reaction, after cooling down to room temperature, the precondensed polymer is obtained ;

[0075](2) Add a polycondensation catalyst and a stabilizer to the precondensed polymer obtained in step (1), and conduct a reaction under reduced pressure and heating for 3.5 hours at 150°C and a vacuum of 0.08MPa. After cooling down to 75°C, add a neutralizer to adjust The pH value was adjusted to 7.5, and finally water was added to adjust the solid content to 83% to obtain a hyperbranched polyester-modified itaconic acid-based water-based photocurabl...

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Abstract

The invention discloses a hyperbranched polyester modified itaconic acid based aqueous light-cured resin, and a preparation method thereof. The hyperbranched polyester modified itaconic acid based aqueous light-cured resin is mainly prepared from following raw materials: itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, an esterification catalyst, a polymerization inhibitor, a polycondensation catalyst, a stabilizer, a neutralizer and water. The preparation method comprises the following steps: (1) mixing itaconic acid, 1,4-butanediol, hyperbranched polyester polyol, epoxy acrylate, the esterification catalyst and the polymerization inhibitor, heating under nitrogen protection for reaction, performing thermal insulation pressure-reduced reaction until no more water is generated, stopping reaction, and cooling; (2) adding the polycondensation catalyst and the stabilizer, performing pressure-reduced heating reaction, cooling, adding the neutralizer, adding water, and obtaining of a finished product. The hyperbranched polyester modified itaconic acid based aqueous light-cured resin is large in color, high in curing speed, hardness, adhesion force, flexibility, water resistance, and biomass content, and is friendly to the environment; the method is simple; no solvent is added in the preparation process; cost is low; and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a photocurable resin and a preparation method thereof, in particular to a hyperbranched polyester modified itaconic acid-based water-based photocurable resin and a preparation method thereof. Background technique [0002] Water-based UV curing resin combines many advantages of UV curing technology and water-based technology. Compared with traditional UV curing resin, water-based UV curing resin is easy to control rheology and convenient construction; no active diluent is needed, and VOC emission is low; it belongs to high Molecular weight water dispersion, regardless of its viscosity, thus solving the problem that the high hardness and high flexibility of the light-cured coating cannot be taken into account at the same time. It can be said that the excellent performance of water-based UV curing resin has broadened the application field of UV curing technology. However, the existing water-based UV-curable resins are mainly prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/676C08G63/85C09D167/06
CPCC08G63/676C08G63/85C09D167/06
Inventor 兰支利范宇戴伟凯薛忍肖自胜尹笃林
Owner HUARONG COUNTY HENGXING BUILDING MATERIALS CO LTD
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