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Low-temperature ultraviolet curing powder coating containing biomass porous carbon and preparation method thereof

A technology for powder coatings and biomass, applied in powder coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor environmental protection of the preparation process, poor comprehensive film-forming performance, and low coating stability, and achieves favorable results. Large-scale industrial production, improved chemical stability, and low cost of raw materials

Active Publication Date: 2020-09-11
GUANGDONG VOCATIONAL & TECHNICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, whether it is abroad or at home, low-temperature UV-curable powder coatings for wood products are still in the development stage. Hyperbranched oligomers are difficult to apply to low-temperature UV-curable powder coatings for wood product coating, thus restricting the application of low-temperature UV-curable powder coatings for wood product coating
In addition, the existing low-temperature UV-curable powder coatings for wood product coating have disadvantages such as high raw material cost, poor environmental protection of the preparation process, low coating stability, and poor film-forming comprehensive performance. The comprehensive performance of low-temperature UV-cured powder coatings has become a major problem that the industry needs to solve urgently

Method used

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  • Low-temperature ultraviolet curing powder coating containing biomass porous carbon and preparation method thereof
  • Low-temperature ultraviolet curing powder coating containing biomass porous carbon and preparation method thereof
  • Low-temperature ultraviolet curing powder coating containing biomass porous carbon and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0032] A low-temperature ultraviolet curable powder coating containing biomass porous carbon, which includes the following components in parts by mass of raw materials:

[0033]

[0034] Wherein, the glass transition temperature of the hyperbranched polyurethane oligomer is 53.5°C and the melting temperature is 74.2°C; the specific surface area of ​​the biomass porous carbon is 300m 2 / g, the thermal weight loss rate at 1000°C is 2wt%.

[0035] Preparation:

[0036] 1) Preparation of hyperbranched polyurethane oligomer: Firstly, 7 parts of hexamethylene diisocyanate and 7 parts of dimethylacetamide are placed in the reaction kettle based on the weight parts of the raw materials, and they are fully mixed at a temperature of 25°C , Get the mixed solution; secondly, add 0.07 parts of dibutyl tin dilaurate and 0.12 parts of hydroquinone to the mixed solution under constant temperature conditions, and add 10.3 parts of hydroxyethyl methacrylate solution dropwise ( The mass ratio of hydro...

Embodiment 2

[0055] A low-temperature ultraviolet curable powder coating containing biomass porous carbon, which includes the following components in parts by mass of raw materials:

[0056]

[0057] Wherein, the glass transition temperature of the hyperbranched polyurethane oligomer is 53.9°C and the melting temperature is 74.8°C. The specific surface area of ​​the biomass porous carbon is 550m 2 / g, the thermal weight loss rate at 1000°C is 2.5wt%.

[0058] Preparation:

[0059] 1) Preparation of hyperbranched polyurethane oligomer: firstly, 8 parts of hexamethylene diisocyanate and 8 parts of dimethylacetamide are placed in a reaction kettle based on the weight parts of raw materials, and they are fully mixed at a temperature of 30°C , Get the mixed solution; secondly, add 0.08 parts of dibutyl tin dilaurate and 0.14 parts of hydroquinone to the mixed solution under constant temperature conditions, and add 11 parts of hydroxyethyl methacrylate solution dropwise ( The mass ratio of hydroxyeth...

Embodiment 3

[0063] A low-temperature ultraviolet curable powder coating containing biomass porous carbon, which includes the following components in parts by mass of raw materials:

[0064]

[0065] Wherein, the glass transition temperature of the hyperbranched polyurethane oligomer is 54.2°C, and the melting temperature is 75.3°C. The specific surface area of ​​the biomass porous carbon is 390m 2 / g, the thermal weight loss rate at 1000°C is 2.5wt%.

[0066] Preparation:

[0067] 1) Preparation of hyperbranched polyurethane oligomer: First, 8.5 parts of diphenylmethane diisocyanate and 8.5 parts of dimethylformamide are placed in a reaction kettle based on the weight of the raw materials, and they are fully mixed at a temperature of 30°C , Get the mixed solution; secondly, add 0.09 parts of octyl tin maleate and 0.16 parts of p-tert-butylcatechol to the mixed solution, and add 11.5 parts of hydroxyethyl methacrylate solution dropwise ( The mass ratio of hydroxyethyl methacrylate to dimethylfo...

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Abstract

The invention discloses a low-temperature ultraviolet curing powder coating containing biomass porous carbon. The low-temperature ultraviolet curing powder coating comprises the following components by mass: 100 parts of hyperbranched polyurethane oligomer; 5-15 parts of biomass porous carbon; 3-7 parts of a photoinitiator; 0.5-1.2 parts of a leveling agent; and 0.3- part of a defoaming agent; wherein the glass transition temperature of the hyperbranched polyurethane oligomer is 50-65DEG C, and the melting temperature of the hyperbranched polyurethane oligomer is 70-100DEG C. According to theinvention, the raw materials are specially selected and proportioned, the biomass porous carbon is introduced to fill and modify a hyperbranched polyurethane oligomer resin matrix, and the low-temperature ultraviolet curing powder coating has excellent hardness, wear resistance, acid and alkali resistance and film-forming property and is adaptive to a conventional powder coating preparation process, so that the strict requirements of a coating required by wood product coating for product performance and production cost can be met. The preparation method is simple in process and has the advantages of low raw material cost, low production cost, high safety, high operability and the like.

Description

Technical field [0001] The invention relates to the field of ultraviolet curing coatings, in particular to a low-temperature ultraviolet curing powder coating containing biomass porous carbon and a preparation method thereof. Background technique [0002] The car steering wheel is an important part of the car steering system, and its structure generally includes a skeleton, wrapping materials and other components. At present, the automobile market adopts different steering wheel configurations for differently positioned cars, which can be roughly divided into ordinary steering wheels, leather steering wheels and wooden steering wheels. In high-end and high-end cars, steering wheels made of wooden materials are often used in order to meet the car’s positioning of grace and luxury. However, due to the characteristics of its own material, wooden steering wheels have certain shortcomings, such as easy cracking, drying and deformation, and low surface smoothness. In this regard, in ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/03C09D7/61
CPCC09D5/033C09D175/14C08K7/24
Inventor 张劲林刘惠娣王蓉蔡祥
Owner GUANGDONG VOCATIONAL & TECHNICAL COLLEGE