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Polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and preparation method thereof

A technology of powder coating and polyester resin, applied in the field of polyester resin, can solve the problems of general mechanical properties of transfer coating film, and achieve the effect of improving storage stability, high cross-linking density and strong rigidity

Active Publication Date: 2016-03-02
ZHEJIANG CHUANHUA TIANSONG NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have also been some reports on the synthesis and preparation of polyester resins for transfer printing powder coatings. The way to improve the transfer performance of coating films in the industry is to modify polyester resins with a large amount of rigid monomers during the synthesis process; Chinese patent CN102977346A discloses A TGIC solidified weather-resistant type polyester resin for thermal transfer powder coatings, the polyester resin uses a large amount of neopentyl glycol, so it can be speculated that the surface hardness of the coating film prepared by the polyester resin is higher, but the polyester resin The mechanical properties of the prepared transfer coating film are general

Method used

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  • Polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and preparation method thereof
  • Polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and preparation method thereof
  • Polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and preparation method thereof

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the examples, but the following examples are only used to set forth the content of the present invention, and are not limiting, so any changes within the meaning and scope equivalent to the claims of the present invention should be considered to be included within the scope of the claims.

[0037]Table 1 is the embodiment of polyester resin, wherein embodiment a is the basic reference comparative formula of polyester resin, as comparative example of the present invention, embodiment b--f is 5 embodiments of the present invention; These embodiments The preparation method is that in a 3000ml reactor, add the polyhydric alcohol, polybasic acid and esterification catalyst in the ratio listed in Table 1; Distill it off, then gradually raise the temperature to 250°C at a rate of 8-10°C / hour, and keep it at 250°C until the material is clear; record the weight of the esterification water, and when the amo...

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Abstract

The invention relates to a polyester resin used for TGIC curing high-toughness thermal transfer printing powder paints, and a preparation method thereof. The glass-transition temperature of the polyester resin is relatively high, so that prepared powder paint coating possesses high toughness at normal temperature and -15 DEG C. According to the preparation method, the polyester resin is obtained via melt polycondensation of following raw materials: a polyol, a polyacid, an acidolysis agent, an esterification catalyst, an antioxidant, and a curing accelerator. The preparation method comprises following steps: 1) the polyol is delivered into a reaction kettle at a needed ratio, rapid heating esterification is carried out, water is generated, and is removed via distillation; 2) temperature is increased gradually, and an obtained material is maintained to be clear; 3) sample examination is carried out; 4) one half of the antioxidant is added, and negative pressure polycondensation is carried out; and 5) cooling is carried out, one half of the antioxidant and the curing accelerator are added, stirring dispersing is carried out, and an obtained product is cooled, and is collected.

Description

technical field [0001] The invention relates to a polyester resin, in particular to a polyester resin for triglycidyl isocyanurate (TGIC) curing high-toughness thermal transfer powder coating, and also relates to a preparation method of the polyester. technical background [0002] Powder coating is a solvent-free and environmentally friendly coating that is widely used in the fields of building materials and home decoration. It has the advantages of simple preparation, efficient coating, economical and environmental protection, and superior performance. The composition of powder coating is mainly composed of main resin, curing agent, pigments and fillers and additives. Polyester resin is one of the main resins for powder coatings. It is a polymer prepolymer obtained by melt polymerization of polybasic acid and polyol. For powder coating systems, polyester resins are required to have a higher glass transition temperature (40-70°C) and certain active functional groups and fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/127C08G63/13C08G63/137C08G63/183C08G63/185C08G63/199C09D167/02C09D5/03
Inventor 汤明麟应明友张林杰邱锋利徐忠根
Owner ZHEJIANG CHUANHUA TIANSONG NEW MATERIAL CO LTD
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