Thermal transfer powdery coating and preparation method and application thereof

A powder coating and thermal transfer printing technology, which is applied in the direction of powder coating, polyester coating, epoxy resin coating, etc., can solve the problem of inability to realize the mechanical properties and surface properties of the coating film, and the inability to withstand the high temperature curing and transfer of thermal transfer powder coatings. Printing conditions, limited range of substrate selection and other issues, to achieve the effect of good fullness and gloss, low curing temperature, and increase crosslinking density and stability

Active Publication Date: 2019-09-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the prior art, thermal transfer powder coatings are mainly used in outdoor decoration, and the matrix resin is mostly polyester resin, which needs to be cured to form a film at a high temperature above 180°C, and the thermal transfer process is also high temperature. It can only happen under high pressure conditions, this harsh curing and transfer conditions greatly limit the choice of substrates
As the application field of thermal transfer powder coatings expands to interior decoration, furniture coating and other fields, heat-sensitive substrates represented by wood, glass, paper, and plastics cannot withstand the existing high-temperature curing and transfer of thermal transfer powder coatings. conditions, it is impossible to achieve the mechanical properties and surface properties of the coating film

Method used

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  • Thermal transfer powdery coating and preparation method and application thereof
  • Thermal transfer powdery coating and preparation method and application thereof
  • Thermal transfer powdery coating and preparation method and application thereof

Examples

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preparation example

[0080] Preparation of surface tension regulator polyethylene glycol grafted polybutylacrylate:

[0081] (1) Add 1mol PEG (M n 2000 g / mol), 1 mol of acrylic acid and 0.01 mol of p-toluenesulfonic acid, stirred and heated up to 110°C, and reacted at this temperature for 3 hours to obtain polyethylene glycol acrylate;

[0082] (2) Add 100mL xylene again in the polyethylene glycol acrylate that step (1) obtains, stir and be heated to reflux temperature, then dropwise add 1mol n-butyl acrylate and 0.3g benzoyl peroxide to the reactor The mixture was added dropwise for 3 hours; after the dropwise addition, the reaction was continued to be stirred at reflux temperature for 4 hours; cooled, and the solvent was removed by rotary evaporation to obtain the polyethylene glycol grafted polybutylacrylate.

[0083] The molecular weight of the polyethylene glycol-grafted polybutylacrylate was tested by GPC, and the number-average molecular weight was 9200 g / mol.

Embodiment 1～8

[0085] A thermal transfer powder coating, the specific components and dosage are shown in Table 1, and the units of the components are "parts by weight".

[0086] Table 1

[0087]

[0088]

[0089] Among them, the bisphenol A type epoxy resin is E12 (604) of Anhui Meijia, and the epoxy equivalent is 830; the epoxy equivalent of the novolak epoxy resin is 225 (Aralaite ECN 9669); the aliphatic epoxy resin is aliphatic glycidol Ether epoxy resin, the epoxy equivalent is 330 (Dow DER732); the acid value of carboxy polyester resin is 70 mg KOH / g (Crylcoat 1501); the average particle size of polytetrafluoroethylene particles A is 1 μm; polytetrafluoroethylene The average particle diameter of ethylene particle B is 200nm; Polyethylene glycol grafted polybutylacrylate is the polyethylene glycol grafted polyacrylate obtained in the preparation example; Oxane (Hybrid plastics, EP0409); isocyanate curing agent is internally blocked polyisocyanate (VESTAGON1321); wetting and dispe...

Embodiment 9

[0093] The difference between this embodiment and embodiment 4 is that the nano filler is alumina with an average particle diameter of 80 nm.

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Abstract

The invention provides a thermal transfer powdery coating and a preparation method and application thereof. The thermal transfer powdery coating comprises, by weight, 51-90 parts of epoxy resin, 40-60 parts of carboxyl polyester resin, 0.5-5 parts of micro-nano polytetrafluoroethylene particle composition, 0.1-5 parts of a surface tension regulator and 0.5-5 parts of a nano filler. The thermal transfer powdery coating is prepared by dispersing, mixing and extruding all the components and then tabletting and crushing the components. The provided thermal transfer powdery coating can be rapidly cured at the low temperature and can be used for coating the surfaces of heat-sensitive substrates such as wood, glass, paper and plastic; a cured coating film has high crosslinking density and hardness, excellent solvent resistance and great substrate adhesion; the surface roughness and surface tension of the powdery coating are suitable for rapid and clear low-temperature thermal transfer, and the dye penetration degree is high.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a thermal transfer printing powder coating and its preparation method and application. Background technique [0002] Thermal transfer printing technology is to transfer the graphics and texts originally printed on paper or film to the surface of the substrate by heating, so as to obtain clear and beautiful patterns, and achieve the effect of marking or decoration. It was mainly used in fabric transfer printing at the earliest. in production. With the rapid development of material science, the application range of thermal transfer printing technology has gradually expanded. Combining thermal transfer printing technology with coatings in architectural decoration, interior decoration and other fields is a new trend that meets people's needs and environmental protection requirements. [0003] Powder coating is an environmentally friendly coating that can form 1...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D167/00C09D5/03C09D7/65
CPCC08L2205/025C08L2205/035C09D5/033C09D163/00C09D167/00C08L63/00C08L67/00C08L27/18C08L51/08C08L83/04
Inventor 陈运法王好盛张婧坤薛杨张冬海
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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