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Formula and preparation method of polyester/epoxy resin powder coating

A technology of epoxy resin powder and powder coating, applied in the direction of powder coating, polyester coating, coating, etc., to achieve the effects of reducing curing time, good social benefits, and improving economic benefits

Inactive Publication Date: 2015-09-09
马倩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the inventor has found through a large number of experiments that adding a polyglycidyl methacrylate polymer in the epoxy resin can not only improve the compatibility and dispersibility between the epoxy resin and the auxiliary agent, but also improve the Make it solidify together with epoxy resin, reduce the curing time, improve the curing rate, found through literature search, there is no relevant technical report

Method used

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  • Formula and preparation method of polyester/epoxy resin powder coating
  • Formula and preparation method of polyester/epoxy resin powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of polyester / epoxy resin powder coating, the formula component of this powder coating is counted as: waste PET particle 723.6g, polyglycidyl methacrylate polymer 0.3mol, dibasic acid anhydride 0.9mol, binary acid anhydride Alcohol 1.71mol, catalyst 0.1%, high temperature resistant filler 10%, high temperature resistant pigment 3%, leveling agent 0.5%, curing agent 25%.

[0026] The relative molecular mass of the waste PET particles is 18000, and the melting point is 260°C.

[0027] The curing agent is aliphatic polyamine.

[0028] The dibasic acid anhydride is dibasic acid anhydride starch ester.

[0029] The high temperature resistant filler is mica powder.

[0030] The high temperature resistant pigment is titanium dioxide.

[0031] A kind of preparation method of polyester / epoxy resin powder coating, concrete preparation step comprises:

[0032] (1) Preparation of low-melting point oligomeric polyester: Alcoholyze the recovered waste PET particles with pol...

Embodiment 2

[0037] A kind of polyester / epoxy resin powder coating, the formula component of this powder coating is counted as: waste PET granule 735.5g, polyglycidyl methacrylate polymer 0.4mol, dibasic acid anhydride 1.00mol, binary acid anhydride Alcohol 1.75mol, catalyst 0.1%, high temperature resistant filler 18%, high temperature resistant pigment 6%, leveling agent 1.5%, curing agent 33%.

[0038] The relative molecular mass of the waste PET particles is 20000, and the melting point is 275°C.

[0039] The curing agent is aliphatic polyamine.

[0040] The dibasic acid anhydride is dibasic acid anhydride starch ester.

[0041] The high temperature resistant filler is mica powder.

[0042] The high temperature resistant pigment is titanium dioxide.

[0043] After preparing materials according to the above formula, its specific preparation method is the same as in Example 1.

Embodiment 3

[0045] A kind of polyester / epoxy resin powder coating, the formula component of this powder coating is counted as: waste PET granule 750.0g, polyglycidyl methacrylate polymer 0.5mol, dibasic acid anhydride 1.02mol, binary Alcohol 1.80mol, catalyst 0.1%, high temperature resistant filler 25%, high temperature resistant pigment 10%, leveling agent 2%, curing agent 40%.

[0046] The relative molecular mass of the waste PET particles is 23000, and the melting point is 305°C.

[0047] The curing agent is one of aliphatic polyamine, alicyclic polyamine, low molecular weight polyamide and modified aromatic amine.

[0048] The dibasic acid anhydride is dibasic acid anhydride starch ester.

[0049] The high temperature-resistant filler is any one of mica powder, silica powder and talc powder.

[0050] The high temperature-resistant pigment is any one of titanium dioxide, iron oxide red, and iron black.

[0051] After preparing materials according to the above formula, its specific p...

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Abstract

The invention discloses a formula and a preparation method of a polyester / epoxy resin powder coating. The formula of the powder coating comprises 723.6-750.0g of waste PET particles, 0.3-0.5mol of glycidyl methacrylate polymer, 0.98-1.02mol of dibasic acid anhydride, 1.71-1.80mol of dibasic alcohol, 0.1% of a catalyst, 10-25% of a high temperature resistant filler, 3-10% of a high temperature resistant pigment, 0.5-2% of a leveling agent and 25-40% of a curing agent. The relative molecular weight of the waste PET particles is 18000-23000, and the melting point of the waste PET particles is not lower than 260DEG C; the curing agent is one of aliphatic polyamine, alicyclic polyamines, low molecular polyamide and modified aromatic amine; the dibasic acid anhydride is dibasic acid anhydride starch ester; the high temperature resistant filler is one of mica powder, silicate powder and talcum powder; and the high temperature resistant pigment is one of titanium dioxide, iron oxide red and complex iron black. The coating has the advantages of good leveling property, good glossiness, low cost, and high economic and social benefits.

Description

technical field [0001] The invention relates to a formula and method for preparing polyester / epoxy resin powder coatings from waste PET plastics, belonging to the technical field of coatings, in particular to a formula and a preparation method of polyester / epoxy resin powder coatings. Background technique [0002] Polyester / epoxy resin has good leveling, decorative, mechanical properties and strong corrosion resistance. It is a kind of thermosetting powder coating, which is prepared from epoxy resin and polyester resin as the main raw materials. The coating has the unique properties of the two at the same time, so that the produced coating film has excellent weather resistance, high fullness, water resistance and oil resistance, etc. It is widely used in the coating of various indoor metal products, such as automobiles, Surface coating of household appliances, metal furniture, instruments, indoor fitness equipment, radiators and other industries. [0003] At present, there ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/02C09D133/14C09D7/12C09D5/03
CPCC09D167/02C08L2201/08C08L2205/03C09D5/033
Inventor 马倩
Owner 马倩
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