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Primer composition for metal substrate and its preparation method and multilayer coat

A technology of primer and composition, which is applied to coatings, polyester coatings, devices for coating liquid on surfaces, etc., can solve the problems of low adhesion between primer and topcoat, and achieve improved hand feel and adhesion. improved effect

Inactive Publication Date: 2011-05-18
海宁市盐官工业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to overcome the shortcoming that the adhesion force between the undercoat and the top coat formed by the existing primer composition for metal substrates is low, and to provide a kind of can obtain and top coat has relatively low shortcoming Primer coating composition for metal substrates with high adhesion basecoat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is used to illustrate the primer composition provided by the present invention and its preparation method.

[0033] Add 100 parts by weight of thermosetting acrylate resin (Nuplex product, 2850 resin) and 15 parts by weight of CAB resin (CAB381-0.5 of Eastman product) into 60 parts by weight of diluting solvent, after mixing evenly, add 20 parts by weight Silver paste, 10 parts by weight of linear polyester resin (Bayer product, 1652 resin) and 2 parts by weight of leveling agent EFKA3883 were mixed uniformly. Finally, 40 parts by weight of an isocyanate curing agent (Bayer product, model N3390) was added to the above mixture and mixed uniformly to obtain a primer composition DT1. Wherein, the diluting solvent is a mixture of toluene, butyl acetate and cyclohexanone, and the weight ratio of the three is 2:2:1. The composition of primer composition DT1 is shown in Table 1.

Embodiment 2

[0038] This embodiment is used to illustrate the primer composition provided by the present invention and its preparation method.

[0039] Add 100 parts by weight of thermosetting acrylate resin (Tongde Chemical, AC1031 resin) and 5 parts by weight of linear polyester resin (Bayer product, Desmophen 670) into 25 parts by weight of the diluting solvent, and mix well. Then, 5 parts by weight of an isocyanate curing agent (Bayer product, model N3390) was added to the above mixture and mixed uniformly to obtain a primer composition DT2. Wherein, the diluting solvent is a mixture of toluene, n-butanol and ethyl acetate, and the weight ratio of the three is 3:1:1. The composition of primer composition DT2 is shown in Table 1.

Embodiment 3

[0044] This embodiment is used to illustrate the primer composition provided by the present invention and its preparation method.

[0045] Add 100 parts by weight of thermosetting acrylate resin (Nuplex product, 2850 resin) and 6 parts by weight of CAB resin (CAB381-0.5 of Eastman product) into 65 parts by weight of the dilution solvent, and after mixing evenly, add 10 parts by weight Silver paste, 18 parts by weight of linear polyester resin (Bayer product, 1652 resin), 1 part by weight of leveling agent EFKA3883, 1 part by weight of defoamer EFKA2022 and 1 part by weight of dispersant Kerper-602 were mixed uniformly. Finally, 28 parts by weight of isocyanate curing agent (Bayer product, model N3390) was added to the above mixture and mixed uniformly to obtain primer composition DT3. Wherein, the diluting solvent is a mixture of toluene, butyl acetate and cyclohexanone, and the weight ratio of the three is 2:2:1. The composition of primer composition DT3 is shown in Table 1....

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Abstract

The invention relates to a primer compound used for metal substrate, which comprises thermosetting acrylic resin and dilution solvent, wherein, the primer compound also comprises linear polyester resin and curing agent. The invention also provides a preparation method for the primer compound and multilayer coating thereof. The primer compound provided by the invention also comprises the linear polyester resin and the curing agent, therefore, the adhesive force between the prime coat and a finishing coat of the multilayer coating is greatly enhanced; furthermore, the hand feeling of the finishing coat is also improved when the primer compound comprises the linear polyester resin and the curing agent.

Description

technical field [0001] The present invention relates to a coating composition for metal substrates and its preparation method and multilayer coating, more particularly to a primer composition for metal substrates and its preparation method and multilayer coating Floor. Background technique [0002] At present, the coating on the surface of the metal substrate, such as the surface of the mobile phone shell and the surface of the laptop computer shell generally includes a primer and a top coat. The primer is formed on the metal substrate, and the top coat is formed on the primer. Coatings are generally formed from paints containing linear polyester resins. The primer used to form the primer layer generally uses epoxy resin as the main resin, and then add pigments, pearl powder or aluminum silver paste to provide metallic luster to adjust the color, and then add CAB resin, leveling agent, adhesion promoter, etc. Auxiliaries to adjust performance, and finally add curing agent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00B05D7/14B05D1/36C09D167/00
Inventor 肖毅豪谭伟华
Owner 海宁市盐官工业投资有限公司