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Low-shrinkage UV curing PUA resin, as well as preparation method and application thereof to preparation of hot bending membrane

A technology of resin and reaction, applied in low-shrinkage UV-cured PUA resin and its preparation, and the application field of hot bending film preparation, can solve the requirements of low shrinkage rate, can not meet the problems of hot bending film, low shrinkage rate, etc., and achieve Effects of low shrinkage, low curing shrinkage, and high shear tensile strength

Inactive Publication Date: 2017-05-17
江苏旭泽技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the application of hot bending films, low shrinkage resin materials are often required to give the required stability to hot bending films. However, most of the materials currently used cannot meet the requirements of low shrinkage for hot bending films.
[0003] CN103553971A discloses a preparation method of polyurethane acrylate, the steps of which are: adding toluene diisocyanate to the reaction kettle, then adding catalyst DST and polymerization inhibitor, adding ethylene glycol acrylate (HEA) dropwise after stirring, and adding ethylene glycol acrylate (HEA) at 60-65 React at ℃ for 3-4 hours, detect the content of free isocyanate in it, when the content of free isocyanate is less than 0.5wt.%, the reaction ends, and polyurethane acrylate is obtained, but the polyurethane acrylate does not have low shrinkage rate

Method used

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  • Low-shrinkage UV curing PUA resin, as well as preparation method and application thereof to preparation of hot bending membrane
  • Low-shrinkage UV curing PUA resin, as well as preparation method and application thereof to preparation of hot bending membrane

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Embodiment 1

[0038] In this embodiment, the UV curing PUA resin is prepared by the following method, which specifically includes the following steps:

[0039] (1) Diisocyanate, polyol and chain extender are reacted at 80° C. for 5 hours in the presence of a catalyst to obtain polyurethane;

[0040] (2) adding hydroxyethyl acrylate to the reaction system obtained in step (1), and reacting at 80°C for 3 hours to obtain the UV curable PUA resin;

[0041] Wherein the mol ratio of polyol and diisocyanate is 30:1, and described polyol is the mixture of polyester polyol and polyether polyol, and the mol ratio of polyester polyol and polyether polyol in the described mixture is 5:1; the functionality of polyester polyol and polyether polyol is 6, the number average molecular weight of polyol is 1000, and described diisocyanate is toluene diisocyanate and diphenylmethane diisocyanate of molar ratio 1:1 The combination, the chain extender is ethylene glycol, the catalyst is stannous octoate, the mo...

Embodiment 2

[0044] In this embodiment, the UV curing PUA resin is prepared by the following method, which specifically includes the following steps:

[0045] (1) Diisocyanate, polyol and chain extender are reacted at 60° C. for 8 hours in the presence of a catalyst to obtain polyurethane;

[0046] (2) adding hydroxyethyl acrylate to the reaction system obtained in step (1), and reacting at 60°C for 2 hours to obtain the UV curable PUA resin;

[0047] Wherein the mol ratio of polyol and diisocyanate is 20:1, and described polyol is the mixture of polyester polyol and polyether polyol, and the mol ratio of polyester polyol and polyether polyol in the described mixture is 3:1. The functionality of polyester polyol and polyether polyol is 8, and the number average molecular weight of polyol is 800, and described diisocyanate is the combination of toluene diisocyanate and diphenylmethane diisocyanate of molar ratio 1:2, expands The chain agent is ethylene glycol, the catalyst is stannous oct...

Embodiment 3

[0050] In this embodiment, the UV curing PUA resin is prepared by the following method, which specifically includes the following steps:

[0051] (1) Diisocyanate, polyol and chain extender are reacted at 90° C. for 4 hours in the presence of a catalyst to obtain polyurethane;

[0052] (2) adding hydroxyethyl acrylate to the reaction system obtained in step (1), and reacting at 90°C for 3 hours to obtain the UV curable PUA resin;

[0053] Wherein the mol ratio of polyol and diisocyanate is 25:1, and described polyol is the mixture of polyester polyol and polyether polyol, and the mol ratio of polyester polyol and polyether polyol in the described mixture is 4:1, the functionality of polyester polyol and polyether polyol is 10, the number average molecular weight of polyol is 1500, and described diisocyanate is toluene diisocyanate and diphenylmethane diisocyanate of molar ratio 2:1 The combination, the chain extender is 1,3-propanediol, the catalyst is dibutyltin dioctoate, t...

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Abstract

The invention provides low-shrinkage UV curing PUA resin, as well as a preparation method and application thereof to preparation of a hot bending membrane. The preparation method of the UV curing PUA resin comprises the following steps: performing reaction on diisocyanate, polyalcohol and a chain extender under the existence of a catalyst to obtain polyurethane; and adding acrylic monomers into the obtained reaction system and reacting to obtain the UV curing PUA resin, wherein the molar ratio of the polyalcohol to the diisocyanate is (10-40):1, the polyalcohol is a mixture of polyester polyol and polyether polyol, and the molar ratio of the polyester polyol to the polyether polyol in the mixture is (3-10):1. According to the UV curing PUA resin prepared by the method, the shrinkage rate is below 0.8 percent after the UV curing PUA resin is cured; when the film-forming thickness is 2.5 microns, the UV curing PUA resin can bear the pressure being more than 1000 gf; when 0000# steel wool moves on the UV curing PUA resin back and forth for 10000 times, the surface is not scratched, and high flexibility and wear resistance are achieved.

Description

technical field [0001] The invention belongs to the field of resin materials, and relates to a PUA resin and its preparation method and application, in particular to a low-shrinkage UV-curable PUA resin, its preparation method and its application in the preparation of hot bending films. Background technique [0002] In the application of hot bending films, low shrinkage resin materials are often required to give the required stability to hot bending films. However, most of the currently used materials cannot meet the requirements of low shrinkage for hot bending films. [0003] CN103553971A discloses a preparation method of polyurethane acrylate, the steps of which are: adding toluene diisocyanate to the reaction kettle, then adding catalyst DST and polymerization inhibitor, adding ethylene glycol acrylate (HEA) dropwise after stirring, and adding ethylene glycol acrylate (HEA) at 60-65 React at ℃ for 3-4 hours, and detect the content of free isocyanate in it. When the conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/40C08G18/32C08L75/14
CPCC08G18/672C08G18/3206C08G18/4018C08J5/18C08J2375/14C08L75/14C08G18/6674
Inventor 金国华朱霆
Owner 江苏旭泽技术有限公司
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