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UV-curable coating and application thereof

A technology for curing coatings and raw materials, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of long baking time, low production efficiency, low surface tension, etc., and achieve good bronzing performance, good solvent resistance, firmness strong effect

Inactive Publication Date: 2020-09-25
上海未希化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Daily-use chemicals have penetrated into people's lives, and the industry has a wide range of applications. Hand cream, facial cleanser, toothpaste, etc. almost all use PE hoses as their packaging materials, and the current coatings on the surface of PE hoses are mainly traditional Two-component polyurethane coatings are mainly used, and a small amount of UV coatings are also used, but they are all UV coatings containing organic solvents, and UV coatings have poor yellowing resistance.
At the same time, the traditional two-component polyurethane coating takes a long time to bake, resulting in low production efficiency, high energy consumption, especially high VOC content, which does not meet the current environmental protection requirements
The PE material is a linear crystalline polymer with low surface tension, acid resistance, alkali resistance, and general organic chemical resistance. The 100% solid UV coating is difficult to adhere to the PE material because of its large curing shrinkage, and Poor toughness, poor bronzing property

Method used

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  • UV-curable coating and application thereof
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  • UV-curable coating and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0064] In one embodiment, the preparation method of the UV-curable coating comprises: mixing thermoplastic acrylic resin and monofunctional acrylate and heating to 75-85°C, stirring and dissolving, adding the remaining preparation raw materials, stirring until uniformly dispersed, and obtaining .

[0065] In a preferred embodiment, the preparation method of the UV curable coating includes: mixing thermoplastic acrylic resin and monofunctional acrylate and heating to 80°C, stirring and dissolving, adding the remaining preparation raw materials, stirring until uniformly dispersed, and obtaining .

[0066] In the present invention, when the weight part of the thermoplastic acrylic resin is 0, no thermoplastic acrylic resin is added in the preparation method of the UV curable coating.

[0067] The second aspect of the present invention provides the UV curable coating for coating PE hoses.

Embodiment

[0069] Hereinafter, the present invention is described in more detail through examples, but it should be understood that these examples are only illustrative and not restrictive. Unless otherwise stated, the raw materials used in the following examples are commercially available.

[0070] The raw materials for the preparation of UV-curable coatings in Examples 1-8 are shown in Table 1, where the unit is parts by weight.

[0071] A: Thermoplastic acrylic resin.

[0072] A1: B-805, the brand is DSM Likang;

[0073] A2: A-11, purchased from American Dow Chemical;

[0074] A3: BR-85, purchased from Mitsubishi Rayon;

[0075] B: Acrylic

[0076] B1: Monofunctional acrylate

[0077] B11: Hydroxyethyl acrylate, free acid content ≤ 0.5wt%, dynamic viscosity at 25°C is 5.34cps, purchased from Jiangsu Sanmu;

[0078] B12: Hydroxyethyl methacrylate, free acid content ≤ 0.5wt%, dynamic viscosity at 25°C is 6.79cps, purchased from Jiangsu Sanmu;

[0079] B13: Acryloylmorpholine, the...

Embodiment 4

[0121] The preparation method of the UV curable coating described in Example 4 includes: mixing and heating the monofunctional acrylate to 80° C., stirring and dissolving, adding the remaining preparation raw materials, and stirring until uniformly dispersed.

[0122] performance evaluation

[0123] Use RDS#4 scraping rod, on the PE hose that flame treatment surface reaches 42 dynes, coat the coating of above-mentioned embodiment 1~8, dry 10 seconds with 60 ℃ of blast ovens, then carry out UV irradiation (high-pressure mercury lamp, Light energy 100mJ / cm 2 ), form a 9 μm bright coating on a PE hose with a thickness of 450 μm, and thus prepare a sample for evaluation. The test items and methods of the obtained evaluation sample are as follows:

[0124] 1. Adhesion test: According to the ISO test method, use the cross-cut test and 3M 810 cellophane tape to determine the adhesion of the hardcoat to the coating film. Adhesion is divided into six grades from 0 to 5, where grade 0...

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Abstract

The invention relates to the technical field of coatings, in particular to a UV curing coating and application thereof. The first aspect of the invention provides the UV curable coating. The UV curable coating comprises the following preparation raw materials in parts by weight: 35-60 parts of acrylate, 0-10 parts of thermoplastic acrylic resin, 15-40 parts of urethane acrylate and 5-12 parts of aphotoinitiator. The UV curable coating provided by the invention is solvent-free, safe and environment-friendly; the UV curable coating adopts ultraviolet light curing and is good in yellowing resistance and low in viscosity; and meanwhile, the UV curable coating gold is good in stamping performance, favorable in flexibility, bright and full, good in solvent resistance and high in firmness.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, the invention relates to a UV curable coating and its application. Background technique [0002] Daily-use chemicals have penetrated into people's lives, and the industry has a wide range of applications. Hand cream, facial cleanser, toothpaste, etc. almost all use PE hoses as their packaging materials, and the current coatings on the surface of PE hoses are mainly traditional Two-component polyurethane coatings are mainly used, and a small amount of UV coatings are also used, but they are all UV coatings containing organic solvents, and UV coatings have poor yellowing resistance. At the same time, the traditional two-component polyurethane coating takes a long time to bake, resulting in low production efficiency, high energy consumption, especially high VOC content, which does not meet the current environmental protection requirements. The PE material is a linear crystalline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D133/04C09D7/65C09D7/47C08J7/04C08L23/06
CPCC08J2323/06C08J2475/14C08L2201/08C08L2203/18C08L2205/03C09D175/14C09D7/47C09D7/65C08J7/0427C08L27/18C08L83/12C08L33/04
Inventor 马春辉马春雷赵伟
Owner 上海未希化学有限公司
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