Ultraviolet-cured white butyl coating as well as preparation method and application thereof

An ultraviolet light and coating technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor toughness, brittle paint film, poor impact resistance, etc. The effect of focus, excellent compactness

Active Publication Date: 2021-01-01
江阴广庆新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although some researches have been done on UV curable white cured coatings, compared with thermal cured coatings, there are still a series of problems such as low adhesion to tinplate, coating resistance to water boiling, and poor impact resistance, which have led to the current It is difficult to implement UV light-cured white curdine coating
[0005] In order to improve the adhesion between the coating and the tinplate, the traditional method is to add a phosphate monomer during the preparation of the tinplate coating. There are three problems: first, the added phosphate monomer has a certain gap between the polarity and the resin, so it is difficult to mix into a uniform phase. Therefore, the storage stability is relatively poor, and it will be separated from the Severe phase separation of the host resin, resulting in incomplete performance of this phosphate ester adhesion promoter
Second, due to the small molecular weight of the added phosphate monomer, it will gradually dissociate to the surface of the paint film, which not only affects the appearance of the coating, but also continuously dissociates to the surface of the paint film, making the adhesion between the coating and the tinplate change. Difference
Third, the added phosphate monomer contains unsaturated double bonds. After UV curing, due to the small molecular weight, the paint film will become brittle and the toughness will become poor.

Method used

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  • Ultraviolet-cured white butyl coating as well as preparation method and application thereof
  • Ultraviolet-cured white butyl coating as well as preparation method and application thereof
  • Ultraviolet-cured white butyl coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, the synthesis of phosphoric acid ester modified polyurethane acrylate PUA01

[0037] The first step, add 160g of diethylene glycol into the reaction kettle with a stirrer and a gas outlet device, the gas outlet is connected to 10% aqueous sodium hydroxide solution, and when the temperature is controlled at 30°C, add dropwise 60g of phosphorus oxychloride, the rate of addition is 1ml / min. After the dropwise addition, the temperature was raised to 60° C. to continue the reaction for 5 hours to obtain intermediate 1.

[0038] In the second step, Intermediate 1 is transferred to a device equipped with a reflux device, under nitrogen protection, 50g of butyl acrylate is added, the temperature is raised to 75°C, 55g of polypropylene glycol (Mn=1000Da) and 20g of Hydroxyl-terminated polysiloxane (Mn=1000Da), stirred for 0.5 hours, slowly added dropwise 58g of toluene diisocyanate at a rate of 0.5ml / min, after the dropwise addition, continued to react for 2 hours...

Embodiment 2

[0043] Synthesis of Phosphate Ester Modified Polyurethane Acrylate PUA02:

[0044] The first step, add 390g of triethylene glycol into the reaction kettle with a stirrer and a gas outlet device, the gas outlet is connected to 10% aqueous sodium hydroxide solution, and when the temperature is controlled at 45°C, add dropwise 95g of phosphorus oxychloride, the rate of addition is 3ml / min. After the dropwise addition, the temperature was raised to 80° C. to continue the reaction for 3 hours to obtain Intermediate 1.

[0045] In the second step, the intermediate 1 is transferred to a device equipped with a reflux device, under nitrogen protection, 85g of n-octyl acrylate is added, the temperature is raised to 85°C, and 80g of polytetrahydrofuran diol (Mn=5000Da) is added And 28g of hydroxyl-terminated polysiloxane (Mn=5000Da), stirred for 0.5 hours, slowly added dropwise 75g of xylene methane diisocyanate, the drop rate was 2.5ml / min, after the dropwise addition, continued to rea...

Embodiment 3

[0050] Synthesis of Phosphate Ester Modified Polyurethane Acrylate PUA03:

[0051] The first step, add 240g of tetraethylene glycol into the reaction kettle with a stirrer and a gas outlet device, connect the gas outlet to 10% aqueous sodium hydroxide solution, and when the temperature is controlled at 35°C, add dropwise 75g of phosphorus oxychloride, the rate of addition is 1.5ml / min. After the dropwise addition, the temperature was raised to 70° C. to continue the reaction for 4 hours to obtain intermediate 1.

[0052] In the second step, the intermediate 1 is transferred to a device equipped with a reflux device. Under the protection of helium, 60g of n-octyl acrylate is added, the temperature is raised to 80°C, and 65 parts by mass of polypropylene glycol (Mn=2000Da ) and 25g of hydroxyl-terminated polysiloxane (Mn=2000Da), stirred for 1 hour, slowly added dropwise 62g of terexylylene diisocyanate, the dropping rate was 1ml / min, after the dropwise addition, continued to r...

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Abstract

The invention provides an ultraviolet-cured white butyl coating as well as a preparation method and application thereof, and belongs to the field of coatings. The resin raw material used in the invention is urethane acrylate resin which has certain toughness and contains a phosphate structure; the polyurethane acrylate resin, titanium dioxide, a photosensitizer, a dispersing agent, a leveling agent and an antifoaming agent are synthesized into the ultraviolet-cured white butyl coating. The coating improves the adhesive force to tinplate in the true sense, and meanwhile, the siloxane resin component in the structure improves the temperature resistance, water resistance and other properties.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to an ultraviolet curable resin and coating for tinplate, in particular to an ultraviolet curable white curable coating and its preparation method and application. Background technique [0002] Tinplate is a commonly used packaging material in modern times. It is mainly used for packaging. Tinplate has the characteristics of corrosion resistance, non-toxicity, high strength and good ductility. As an important packaging material, it has been widely used from the food industry to traditional industries. , including food packaging tin boxes, tin cans and other fields. Before tinplate is used as a packaging material, and before the surface of tinplate is printed to meet specific use requirements, it is necessary to coat a layer of white paint on its surface for subsequent printing. This white primer paint is called Bai Ke Ding . [0003] So far, the white curdine used in tinplate print...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C09D5/08C08G18/83C08G18/67C08G18/61C08G18/48
CPCC09D175/14C09D7/61C09D5/08C08G18/836C08G18/61C08G18/4825C08G18/673C08G18/4854C08K2003/2241C08K3/22C08G18/48
Inventor 曹欣欣刘嘉州唐雄
Owner 江阴广庆新材料科技有限公司
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