A kind of polyester resin for HAA curing thermal transfer type powder coating and preparation method thereof
A technology of powder coating and polyester resin, which is applied in the field of polyester resin, can solve the problems that the use requirements cannot be met, polyester resin has no articles and patent reports, etc., and achieve the effect of short curing time
Active Publication Date: 2019-11-19
GUANGZHOU KINTE IND
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Problems solved by technology
However, when HAA is used to cure the resin to prepare a powder coating, it will stick to paper after transfer, which cannot meet the requirements for use.
[0004] At present, the thermal transfer powder coatings on the market are mainly polyester / TGIC system, polyurethane system and polyester / epoxy type. There are no articles and articles on polyester resins for thermal transfer powder coatings of the polyester / HAA system. Patent report
Method used
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[0030] The following examples are only used to illustrate the present invention, and do not limit the protection scope of the present invention. Those of ordinary skill in the art can realize the object of the present invention according to the scope disclosed above.
[0031] The present invention is described below in conjunction with embodiment, and table 1 is the embodiment of polyester resin.
[0032] Preparation method of polyester resin: add diol, polyol and hydroxyl-terminated silicone oil into the reaction kettle according to the ratio, heat up until the material melts, then add the ratio of dibasic acid and catalyst in sequence, turn on the nitrogen protection and gradually start to heat up, When the temperature is raised to 220-250°C, heat preservation reaction is carried out, and after 10-13 hours of reaction until 85%-98% of the esterified water is discharged, the acid value reaches 8-12mgKOH / g; acidolysis agent is added, and the reaction is carried out for 2-4 hou...
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Abstract
The invention discloses a polyester resin for an HAA-curable thermal transfer powder coating. The polyester resin has the acid value of 40-55mgKOH / g, the 200-DEG C melt viscosity of 2000-3500mPa.s, the glass transition temperature of 55-65 DEG C and the 180-DEG C reactivity of 180-350s. The polyester resin is mainly prepared by carrying out a melt phase polycondensation reaction on the following monomer components in percentage by mass: 24%-40% of dihydric alcohol, 0.1%-0.5% of polyhydric alcohol, 0%-15% of hydroxy silicone oil, 47%-58% of binary acid, 8%-12% of acidolysis agent and 0.01%-0.2%of catalyst. The curing time of the polyester resin is relatively short; a prepared powder coating has a good transfer effect and further has good leveling property, excellent mechanical property andthe like. The invention further discloses a preparation method of the polyester resin for the HAA-curable thermal transfer powder coating.
Description
technical field [0001] The invention belongs to the technical field of polyester resins, and in particular relates to a polyester resin for HAA curing thermal transfer printing powder coating and a preparation method thereof. Background technique [0002] Thermal transfer printing, also known as thermal sublimation, is to print various patterns on high-precision paper with transfer printing ink, and use thermal transfer equipment to heat it to the set temperature in a short time, so that the patterns on the transfer paper A special process of transferring to aluminum profile coating and other materials. This technology can provide brightly colored and richly layered transfer patterns to achieve the purpose of imitating wood grain and stone statues, and can save a large amount of non-renewable natural resources. Therefore, it has been widely praised since its appearance, and the market has grown rapidly. Most of the thermal transfer powder coating resins currently on the mar...
Claims
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IPC IPC(8): C08G63/20C08G63/695C08G63/85C09D5/03C09D167/02
CPCC08G63/20C08G63/6956C08G63/85C09D5/033C09D167/02
Inventor 王泼谢静李勇刘亮
Owner GUANGZHOU KINTE IND