HAA solidified polyester resin for sand streak 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 of insufficient unevenness of texture, insufficient mechanical properties, and high gloss of sand grains, and achieve strong unevenness, excellent mechanical properties, and low surface gloss Effect

Inactive Publication Date: 2017-03-29
GUANGZHOU KINTE IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, a common problem of sand grain powder coatings is that the mechanical properties are not good enough.
Compared with the polyester resin for sand grain powder coatings with TGIC curing system, the polyester resin for sand grain powder coatings with HAA curing system lacks a suitable curing accelerator, so the gloss of sand grains is higher and the texture is not enough. Strong, but the mechanical properties are not good enough

Method used

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  • HAA solidified polyester resin for sand streak powder coating and preparation method thereof
  • HAA solidified polyester resin for sand streak powder coating and preparation method thereof

Examples

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Embodiment Construction

[0025] Some specific examples are enumerated below to illustrate the present invention, and Table 1 shows the examples and comparative examples of polyester resins. In the reactor, add neopentyl glycol, methylpropanediol, 1,4-cyclohexanedimethanol, trimethylolpropane, and trimethylolethane in proportions listed in Table 1, and heat up to the Melt; then add terephthalic acid, monobutyl dihydroxy tin chloride, continue to heat up the reaction with nitrogen, until 180 ° C esterification water begins to form and distill; then gradually increase the temperature to 245 ° C, and react for 9 to 13 hours to More than 95% of the esterification water is discharged. At this time, the material system is clear and transparent, and the acid value reaches 18-23mgKOH / g; the temperature is lowered to 230°C, and the acidolysis agent is added in a proportioned amount, and the reaction is 2-4 hours. At this time, the material system is clear Transparent, the acid value reaches 32-38 mgKOH / g; after...

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Abstract

The invention discloses HAA solidified polyester resin for sand streak powder coating. The acid value is 20-25mg KOH, 200DEG C viscosity is 9000-15000mPa.s, and glass-transition temperature is 60-70 DEG C; the polyester resin is prepared by the following components in parts by weight from a melt phase polycondensation reaction: 30-40 parts of dihydric alcohol, 50-60 parts of aromatic diacid, 0.2-2.0 parts of polyol, 3-8 parts of an acidolysis agent, and 0.1-0.2 parts of a catalyst for esterification. The invention discloses a preparation method of polyester resin. The sand streak powder coating prepared by the polyester resin has the advantages of good sand streak forming effects, clear sand streak texture, good concavo-convex sense, and excellent mechanical properties of film; and the powder coating can be widely applied to coating in the fields of apparatus and instrument, power distribution cabinet, antitheft door, metal toy, household electrical appliance, furniture, decorative lighting, and the like.

Description

technical field [0001] The invention relates to a polyester resin for HAA-cured sand grain powder coating, and also relates to a preparation method of the polyester resin. Background technique [0002] Sand pattern powder coating is a kind of functional art powder coating, which has the advantages of beautiful pattern, strong decoration, good scratch resistance, and can make up for and cover defects such as rough and uneven surface of the workpiece. Therefore, this type of powder coating is widely used in the coating of instruments and meters, power distribution cabinets, security doors, metal toys, home appliances, furniture, lighting and other fields. [0003] In order to achieve the sanding effect, a physical sanding agent is generally added to the powder coating. The mechanism of action is: when the powder coating is melted and leveled, since the surface tension of the sanding agent is smaller than that of the normal powder coating film, it is dispersed in The sanding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C09D5/03C09D167/00
CPCC08G63/20C09D5/03C09D167/00
Inventor 李小强谢静李勇曾历曾定顾宇昕
Owner GUANGZHOU KINTE IND
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