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Method for preparing polyurethane acrylic resin

A technology of urethane acrylate and hydroxy acrylate, applied in the field of resin preparation, can solve the problems of instable HDI trimer structure, instable chain structure, low hardness of paint film, etc., and achieve good wear resistance and high hardness. , the effect of high hardness

Inactive Publication Date: 2006-10-25
广东中科建设科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the HDI chain structure is not stable enough, the structure of the HDI trimer obtained from the monomer with the chain structure is not stable enough, and because the trimer contains a flexible carbon chain, it has low hardness and poor wear resistance. , so the paint film formed by the polyurethane acrylate resin prepared by HDI trimer has low hardness and poor wear resistance

Method used

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  • Method for preparing polyurethane acrylic resin
  • Method for preparing polyurethane acrylic resin
  • Method for preparing polyurethane acrylic resin

Examples

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preparation example Construction

[0009] The preparation method of the urethane acrylate resin provided by the invention comprises, in the presence of a catalyst, a solvent and a polymerization inhibitor, contacting an isocyanate trimer with a hydroxyacrylate, wherein the isocyanate trimer is selected from the group consisting of isophorone One or more in diisocyanate (IPDI) trimer, dicyclohexylmethane diisocyanate (HMDI) trimer, hexahydrotoluene diisocyanate (HTDI) trimer, preferably adopt isophorone diisocyanate ( IPDI) trimer.

[0010] According to the present invention, described isophorone diisocyanate (IPDI) trimer has following chemical structural formula:

[0011]

[0012] The dicyclohexylmethane diisocyanate (HMDI) trimer has the following chemical structural formula:

[0013]

[0014] Described hexahydrotoluene diisocyanate (HTDI) trimer has following chemical structural formula:

[0015]

[0016] Toluene diisocyanate (TDI) can be 2, 6 isomers, 2, 4 isomers or their mixtures, and industria...

Embodiment 1

[0028] This example illustrates the preparation of polyurethane acrylate resin

[0029] Add 200 g of butyl acetate solution containing 70% isophorone diisocyanate trimer into the reaction flask, preheat at 45° C. for 10 minutes, and stir. Then the solution formed by dissolving 84.7 grams of hydroxyethyl methacrylate, 0.05 grams of dibutyltin dilaurate, and 0.02 grams of p-methoxyphenol in 30 grams of butyl acetate is slowly added to the reaction flask. The reaction temperature was increased to 65° C., and the reaction was maintained at this temperature for 4 hours to obtain polyurethane acrylate resin S1.

Embodiment 2

[0034] This example illustrates the preparation of polyurethane acrylate resin

[0035] Add 200 g of butyl acetate solution containing 70% isophorone diisocyanate trimer into the reaction flask, preheat at 45° C. for 10 minutes, and stir. Then the solution formed by dissolving 83.5 grams of hydroxyethyl methacrylate, 0.1 gram of dibutyltin dilaurate, and 0.025 gram of p-methoxyphenol in 35 grams of butyl acetate is slowly added to the reaction flask. The reaction temperature was increased to 65° C., and the temperature was maintained for 4 hours to obtain polyurethane acrylate resin S2.

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Abstract

The invention discloses a manufacture method for urethane acrylate that makes isocyanate tripolymer contacting with hydroxy acrylic acid ester under the existence of catalyst, solvent and polymerization inhibitor. The isocyanate tripolymer could be one or several from IPDI tripolymer, HMDI tripolymer, and HTDI tripolyer. The invention has strong rigidity, and good wear resistance.

Description

technical field [0001] The invention relates to a method for preparing a resin, in particular to a method for preparing a polyurethane acrylate resin used for ultraviolet curing coatings. Background technique [0002] The resins used in traditional UV-curable coatings are low-functional urethane acrylate resins with 2-3 functional groups or high-functional urethane acrylate resins with 5-9 functional groups. UV-curable coatings with low functional group urethane acrylate resin as the main component are widely used in spraying on the surface of wood, leather, artificial leather and plastic accessories. [0003] Low-functional urethane acrylate resins currently on the market for formulating UV-curable coatings include linear urethane acrylate resins and urethane acrylate resins with a certain spatial structure. Wherein, the main reaction raw materials used for the preparation of polyurethane acrylate resins with a certain spatial structure include isocyanate trimers, and the ...

Claims

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Application Information

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IPC IPC(8): C08G18/04
Inventor 谭伟华邓国栋刘会权
Owner 广东中科建设科技有限公司
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