WO2010078799A1

WO2010078799A1 - Uv coating for magnesium-aluminum alloy surface spraying

Info

Publication number: WO2010078799A1
Application number: PCT/CN2009/075734
Authority: WO
Inventors: 罗小鄯
Original assignee: 深圳桑菲消费通信有限公司
Priority date: 2009-01-06
Filing date: 2009-12-22
Publication date: 2010-07-15
Also published as: CN101463220A

Abstract

A UV coating for magnesium-aluminum alloy surface spraying comprises a basecoat composition, an intermediate coat composition and a top coat composition. The basecoat composition comprises the components with their weight ratio as follows: basecoat : curing agent : diluent = 100 : 33: (25-40); the intermediate coat composition comprises the components with the weight ratio as follows: intermediate coat: curing agent : diluent = 100 : 5: (80-120); and the top coat composition comprises the components with the weight ratio as follows: top coat : diluent = 100 : (15-30).

Description

Title of Invention: A UV coating for the surface coating of magnesium alloys

Technical field

[1] The present invention relates to the field of coatings, and in particular to a UV (ultraviolet light) for spraying a surface of a magnesium alloy

) paint.

Background technique

[2] Since 2004, mobile phones have gradually accepted the design of magnesium-aluminum alloys. The proportion of sputum has increased rapidly since 2006. The growth in 2007 continues to be optimistic, but magnesium-aluminum alloys are used in the process of high-gloss coating. PUUsing PU coating (two-component polyurethane) spraying method to achieve high light effect, because the process spray straight-through rate is only about 35%, the manufacturing cost is high, and the coating is easy to fall off the paint.

Disclosure of invention

technical problem

[3] The object of the present invention is to provide a UV coating for spraying on the surface of a magnesium-aluminum alloy, which has high adhesion and strong ductility, and has a production straight-through rate of over 70%, which reduces the original PU lacquer magnesium. Production cost of aluminum alloy spraying.

Technical solution

[4] In order to achieve the above object, the technical solution adopted by the present invention is: Providing a UV coating for spraying a surface of a magnesium aluminum alloy, the coating comprising a primer coating, a medium coating and a top coating, wherein: The primer and lacquer coatings and topcoat coatings described include the components and weight ratios: Primer: Curing agent: Thinner = 100: 33: (25 -40); The lacquer coating includes The composition and concentration ratio are: Medium paint: Curing agent: Thinner = 100: 5: (80-120); The top coat includes the components and concentration ratio: Topcoat: Thinner = 100: (15 -30).

Beneficial effect

[5] Compared with the prior art, the invention solves the problem of dust spots on the surface of high-gloss PU spraying on the surface of magnesium-aluminum alloy, The PU paint is a two-component paint. The paint needs to be baked at 80 ° C for 30 min, and the paint drying method is to dry from the surface to the inside. In the high temperature baking, there is a vapor outflow in the magnesium alloy, which is easy. When the surface of the paint is flushed out of the bubble, or the surface of the paint film falls to the dust, it is a particle point. The UV coating coated on the surface of the magnesium-aluminum alloy of the invention can solve the problem that the PU paint is easy to fall off and the surface dust point is problematic.

DRAWINGS

[6]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention provide a UV (ultraviolet light) coating for surface spraying of a magnesium aluminum alloy, the coating comprising a primer coating, a middle coating coating, and a top coating, wherein: the primer coating, the intermediate coating And the topcoat paint includes the components and weight ratio:

Paint primer in project primer

[9] Primer, intermediate paint and topcoat 822—BJS-1550 (Aksu) 899—BJS-1583 (Aksu)

970-CJS-1169 (Aksu)

[10] Curing agent 822-JJS-1551 (Akesu) 822-JJS-1342 (Akesu)

[11] Thinner 480-XJS-1137 (Akesu) 480-XJS-1048 (Akesu) 480-XJS-1223 (Aksu)

[12] Paint temperature 15-25 °C 15-25 °C 15-25 °C

[13] Paint Weight Matching Primer: Curing Agent: Thinner

[14] 100:33:25 lacquer: curing agent: thinner

[15] 100:5:100 topcoat: thinner

[16] 100:25

[17] Matching viscosity 9.5— 11.3S 9.5-10.5S 9.3-10.5S

[18] Coating film thickness 10-15u 8-12u 20-25u

[19] In the above table, the composition and weight ratio of the primer described are:

[20] Primer (Chemical number of Akzo: 822-BJS-1550) Formulation

[21] Chemical composition weight ratio range (%) chemical number

[22] Epoxy resin 16.5 Not mentioned

[23] Add Qi lj 1.0 Not mentioned

[24] Talc powder 12.0 14807-96-6 [25] Carbon Black 3.2 01333-86-4

[26] Bisphenol 15 25068-38-6

[27] Solvent

[28] Benzene Solvent 10 1330-20-7

[29] Ketone solvent 5 110-43-0

[30] Benzene Solvent 10 100-41-4

[31] Ketone solvents 8 108-10-1

[32] Primer Curing Agent (Akesu's Chemical Number: 822-JJS-1551) Formulation

[33] Chemical composition weight ratio range (%) chemical number

[34] Polyamide Resin 53 Not mentioned

[35] Additives 1 Not mentioned

[36] Solvent

[37] Benzene Solvent 14 1330-20-7

[38] Benzene Solvent 15 108-88-3

[39] Benzene Solvent 5 100-41-4

[40] Alcohol solvent 15 71-36-3

[41] Primer Thinner (Chemical Number for Akzo: 480-XJS-1137) Formulation

[42] Chemical composition weight ratio range (%) chemical number

[43] Alcohol solvent 35 000111-76-2

[44] Aromatic Solvent ² 0 001330-20-7

[45] Ester solvent 20 000141-78-6

[46] Ester solvent 20 000123-86-4

[47] Aromatic solvent 5 000100-41-4

[48] 中漆 (Akesu's Chemical Number: 899-BJS-1583) Formulation

[49] Chemical composition weight ratio range (%) chemical number

[50] Vinyl Resin 13.5 Not mentioned

[51] Acrylic 11.0 Not mentioned

[52] 添力口齐'J 2 Not mentioned [53] Carbon Black 0.7 01333-86-4

[54] Solvent

[55] Ester solvent 30 000123-86-4

[56] Aromatic Solvent 15 001330-20-7

[57] Ketone solvents 5 000108-10-1

[58] Ketone solvent 10 000078-93-3

[59] Ketone solvents 8.5 000067-64-1

[60] Medium Curing Agent (Chemical Code of Aksu: 822-JJS-1342) Formulation

[61] Chemical composition weight ratio range (%) chemical number

[62] Polyhexamethylene diisocyanate 60 2818-81-2

[63] Solvent

[64] Ester solvent 20 123-86-4

[65] Benzene Solvent 15 1330-20-7

[66] Benzene Solvent 15 100-41-4

[67] Medium Paint Thinner (Akesu Chemical Number: 480-XJS-1048) Formulation

[68] Chemical composition weight ratio range (%) chemical number

[69] Ketone solvents 50 000078-93-3

[70] Ketone solvent 20 000110-43-0

[71] Alcohol solvent 30 000111-76-2

[72] Topcoat (Akesu's Chemical Number: 970-CJS-1169) Formulation

[73] Chemical composition weight ratio range (%) chemical number

[74] Acrylic 45 Not mentioned

[75] Acrylic Resin 6 015625-89-5

[76] Acrylic Resin 4.5 013048-33-4

[77] 添力口齐 'J 3 Not mentioned

[78] Solvent

[79] Ester solvent 10 041556-26-7

[80] Alcohol solvent 5 000067-63-0 [81] Alcohol solvent 5 000071-36-3

[82] Ketone solvent 10 000078-93-3

[83] Ketone solvent 6 007473-98-5

[84] Topcoat Thinner (Akesu's Chemical Number: 480-XJS-1223)

[85] Chemical composition weight ratio range (%) chemical number

[86] Ketone Solvent 60 000078-93-3

[87] Alcohol Solvent 24 000071-36-3

[88] Alcohol Solvent 16 000067-0

[89] In the above formula, the above chemical components can be found by chemical number, and the epoxy resin (Epoxy Resin) in the present embodiment generally refers to two or more rings. An oxy group, a polymer oligomer which is an organic compound such as an aliphatic, alicyclic or aromatic group and which can be reacted by an epoxy group to form a useful thermosetting product, which can be used in the prior art. Molecular oligomers can be used.

[90] The unscheduled polyamide resin in the formulation of the embodiment of the present invention refers to a low molecular weight of a condensed polymer of a dimeric vegetable oil of 650, 651, 300# and a fatty amine, which is an excellent epoxy resin. A tough curing agent, which is also a product of any of the low molecular weight polycondensation of dimeric vegetable oil fatty acid and fatty amine used in the prior art.

[91] The unsynthesized additive of the present invention refers to a leveling agent, an antifoaming agent, and a dispersing agent, all using a leveling agent, an antifoaming agent and a dispersing agent of the prior art. Its role is as follows:

[92] (1) Leveling agent: Leveling agent is used to improve the leveling of the paint layer, prevent the occurrence of shrinkage cavities, smooth the surface of the paint film, and increase the gloss of the paint.

[93] (2) Defoamer: Defoamer is used to improve the leveling of the paint layer, prevent the occurrence of shrinkage cavities, and smooth the surface of the paint film, which also increases the gloss of the paint.

[94] (3) Dispersing agent: The dispersing agent can make the pigment in the paint very well and low in the binder, so that the pigment has good dispersibility in the paint and prevent the pigmentation and precipitation of the pigment particles in the paint. Dispersants are generally surfactants.

[95] The uncoded vinyl resin of the present invention refers to a polymer resin prepared by self-polymerization or copolymerization of an ethylene derivative monomer containing a double bond as a main film-forming substance; an acrylic resin which is not chemically numbered Broadly speaking, it is a general term for homopolymers and copolymers of (meth)acrylic acid and derivatives. The vinyl resin and the acrylic resin can be used in the prior art.

Formulated by the above formula, the obtained product performance results are as follows:

Performance test test method test result judgment

Hardness GB/T6739-96 2H surface without visible scratches qualified

Adhesion GB/T9286-88. Surface paint layer <5% qualified

RCA wear resistance Norman RCA #71BB wear tester (load 175g) 250Cycles no material background color qualified

Thermal shock -40°Cx30Min, 85°Cx30Min, 32 Cycles paint surface is not abnormally qualified High temperature and high humidity 70°Cx95%RH, 48H paint surface is not abnormal

Artificial sweat Acid PH=2.6 60°C 90% humidity 48H paint surface is not abnormally qualified

Basic PH=8.8 60°C 90% humidity 48H paint surface is not abnormally qualified

Salt spray test 35°C 85 RH 5 NaCL 48H paint surface is not abnormally qualified

0.8M drop

Test and assemble the finished mobile phone, and naturally fall from the height of 0.8M to the marble floor 6 times (once per side).

Embodiments of the invention

Example 2

This embodiment only illustrates a different part from the embodiment 1, and the same part will not be described.

The primer coating according to the embodiment of the invention comprises a component and a weight distribution ratio of:

Paint primer in project primer

Primer, intermediate paint and topcoat 822—BJS-1550 (Aksu) 899—BJS-1583 (Aksu)

970-CJS-1169 (Aksu)

Curing agent 822-JJS-1551 (Aksu) 822-JJS-1342 (Akesu)

Diluent 480-XJS-1137 (Aksu) 480-XJS-1048 (Akesu) 480-XJS-1223 (Akesu paint temperature 15-25. C 15-25. C 15-25 °C

Paint weight matching primer: curing agent: thinner

100:33:30 medium paint: curing agent: thinner [119] 100:5:80 Topcoat: Thinner

[120] 100: 15

[121] Matching viscosity 9.5— 11.3S 9.5-10.5S 9.3-10.5S

[122] Coating film thickness 10-15u 8-12u 20-25u

[123] In the above table, the composition and weight ratio range (%) of the primer described are:

[124] Primer (Chemical number of Akzo: 822-BJS-1550) Formulation

[125] Chemical composition weight ratio range (%) chemical number

[126] Epoxy resin 10 Not mentioned

[127] 添力口齐 'J 1 Not mentioned

[128] Talc 15 14807-96-6

[129] Carbon Black 2 01333-86-4

[130] Bisphenol 15 25068-38-6

[131] Solvent

[132] Benzene Solvent 12 1330-20-7

[133] Ketone solvents 10 110-43-0

[134] Benzene Solvent 20 100-41-4

[135] Ketone solvents 15 108-10-1

[136] Primer Curing Agent (Akesu's Chemical Number: 822-JJS-1551) Formulation

[137] Chemical composition weight ratio range (%) chemical number

[138] Polyamide Resin 40 Not mentioned

[139] Additives 2 Not mentioned

[140] Solvent

[141] Benzene Solvent 15 1330-20-7

[142] Benzene Solvent 10 108-88-3

[143] Benzene Solvent 8 100-41-4

[144] Alcohol Solvent 5 71-36-3

[145] Primer Thinner (Axu Chemical Number: 480-XJS-1137) Formulation

[146] Chemical composition weight ratio range (%) chemical number [147] Alcohol solvent 30 000111-76-2

[148] Aromatic Solvent 20 001330-20-7

[149] Ester solvent 25 000141-78-6

[150] Ester solvent 20 000123-86-4

[151] Aromatic solvent 5 000100-41-4

[152] lacquer (Akesu's chemical number: 899-BJS-1583) formula

[153] Chemical composition weight ratio range (%) chemical number

[154] Vinyl 15 Not mentioned

[155] Acrylic 13 Not mentioned

[156] 添力口齐¹ J 1.5 Not mentioned

[157] Carbon Black 0.5 01333-86-4

[158] Solvent

[159] Ester solvent 20 000123-86-4

[160] Aromatic Solvent 10 001330-20-7

[161] Ketone solvent 10 000108-10-1

[162] Ketone solvent 15 000078-93-3

[163] Ketone solvent 15 000067-64-1

[164] Medium Curing Agent (Chemical Number of Akzo: 822-JJS-1342) Formulation [165] Weight Ratio of Chemical Composition (%) Chemical Number

[166] Polyhexamethylene diisocyanate 70 2818-81-2

[167] Solvent

[168] Ester solvent 10 123-86-4

[169] Benzene Solvent 10 1330-20-7

[170] Benzene Solvent 10 100-41-4

[171] lacquer thinner (Akesu's chemical number: 480-XJS-1048) Formulation [172] Chemical composition weight ratio range (%) Chemical number

[173] Ketone solvents 50 000078-93-3

[174] Ketone solvent 25 000110-43-0 Alcohol solvent 25 000111-76-2

Topcoat (Akesu's Chemical Number: 970-CJS-1169) Formula

Chemical composition weight ratio range (%) chemical number

Acrylic 40 Not mentioned

Acrylic resin 10 015625-89-5

Acrylic resin 10 013048-33-4

添力口齐¹ J 5 Not mentioned

Solvent

Ester solvent 5 041556-26-7

Alcohol solvent 10 000067-63-0

Alcohol solvent 8 000071-36-3

Ketone solvent 5 000078-93-3

Ketone solvent 10 007473-98-5

Topcoat thinner (Akesu's chemical number: 480-XJS-1223)

Chemical composition weight ratio range (%) chemical number

Ketone solvent 65 000078-93-3

Alcohol solvent 15 000071-36-3

Alcohol solvent 20 000067-63 -0

The performance test results obtained by the above formulation were the same as in Example 1.

Example 3

The primer coatings of the embodiments of the present invention comprise components and weight ratios as follows:

Paint primer in project primer

970-CJS-1169 (Aksu)

Curing agent 822-JJS-1551 (Aksu) 822-JJS-1342 (Akesu)

Diluent 480-XJS-1137 (Aksu) 480-XJS-1048 (Akesu) 480-XJS-1223 (Akesu paint temperature 15-25. C 15-25. C 15-25. C [202] Paint Weight Matching Primer: Curing Agent: Thinner

[203] 100:33:40 medium paint: curing agent: thinner

[204] 100:5: 120 topcoat: thinner

[205] 100:30

[206] Matching viscosity 9.5—11.3S 9.5-10.5S 9.3-10.5S

[207] Coating film thickness 10-15u 8-12u 20-25u

[208] In the above table, the composition and weight ratio range (%) of the primer described are:

[209] Primer (Chemical number of Akzo: 822-BJS-1550) Formulation

[210] Chemical composition weight ratio range (%) chemical number

[211] Epoxy 15 Not mentioned

[212] Additives 0.5 Not mentioned

[213] Talc 20 14807-96-6

[214] Carbon Black 1 01333-86-4

[215] Bisphenol 10 25068-38-6

[216] Solvent

[217] Benzene Solvent 15 1330-20-7

[218] Ketone solvents 20 110-43-0

[219] Benzene Solvent 15 100-41-4

[220] Ketone solvents 3.5 108-10-1

[221] Primer Curing Agent (Akesu's Chemical Number: 822-JJS-1551) Formulation

[222] Chemical composition weight ratio range (%) chemical number

[223] Polyamide Resin 35 Not mentioned

[224] 添力口齐 'J 2 Not mentioned

[225] Solvent

[226] Benzene Solvent 25 1330-20-7

[227] Benzene Solvent 5 108-88-3

[228] Benzene Solvent 20 100-41-4

[229] Alcohol Solvent 13 71-36-3 [230] Primer Thinner (Chemical Number for Akzo: 480-XJS-1137) Formulation

[231] Chemical composition weight ratio range (%) chemical number

[232] Alcohol Solvent 20 000111-76-2

[233] Aromatic Solvent 30 001330-20-7

[234] Ester solvent 10 000141-78-6

[235] Ester solvent 30 000123-86-4

[236] Aromatic Solvent 10 000100-41-4

[237] 中漆 (Akesu's Chemical Number: 899-BJS-1583) Formulation

[238] Chemical composition weight ratio range (%) chemical number

[239] Vinyl Resin 10 Not mentioned

[240] Acrylic 20 Not mentioned

[241] Additives 3 Not mentioned

[242] Carbon Black 1 01333-86-4

[243] Solvent

[244] Ester solvent 15 000123-86-4

[245] Aromatic Solvent 20 001330-20-7

[246] Ketone solvents 15 000108-10-1

[247] Ketone Solvent 7 000078-93-3

[248] Ketone Solvent 10 000067-64-1

[249] Medium Paint Curing Agent (Akesu Chemical Number: 822-JJS-1342) Formulation

[250] Chemical composition weight ratio range (%) chemical number

[251] Polyhexamethylene diisocyanate 60 2818-81-2

[252] Solvent

[253] Ester solvent 30 123-86-4

[254] Benzene Solvent 5 1330-20-7

[255] Benzene Solvent 5 100-41-4

[256] Medium Paint Thinner (Akesu Chemical Number: 480-XJS-1048) Formulation

[257] Chemical composition weight ratio range (%) chemical number [258] Ketone solvent 40 000078-93-3

[259] Ketone solvent 30 000110-43-0

[260] Alcohol solvent 30 000111-76-2

[261] Topcoat (Akesu's Chemical Number: 970-CJS-1169) Formulation

[262] Chemical composition weight ratio range (%) chemical number

[263] Acrylic 30 Not mentioned

[264] Acrylic resin 7 015625-89-5

[265] Acrylic resin 5 013048-33-4

[266] Tim Liqi ¹ J 2 Not mentioned

[267] Solvent

[268] Ester solvent 15 041556-26-7

[269] Alcohol Solvent 1 000067-63-0

[270] Alcohol solvent 10 000071-36-3

[271] Ketone solvent 15 000078-93-3

[272] Ketone Solvent 15 007473-98-5

[273] Topcoat Thinner (Akesu's Chemical Number: 480-XJS-1223)

[274] Chemical composition weight ratio range (%) chemical number

[275] Ketone solvents 55 000078-93-3

[276] Alcohol Solvent 35 000071-36-3

[277] Alcohol solvent 10 000067-0

The effect obtained by the formulation described in the examples of the present invention is similar to that of the first embodiment.

[279] In the above three embodiments, in the formulation composition, the product names can be found by chemical numbers, and the products without chemical numbers are all chemical products well known in the prior art. In the embodiment of the present invention, the role of the primer is to increase the organic adhesion of the coating layer of the paint and the magnesium-aluminum alloy; the effect of the lacquer is to adjust the color of the colored layer desired by the consumer, such as black, red, blue, etc. The role of the topcoat is high adhesion and high abrasion resistance is the UV Coating coating, which has the anti-wear effect of protecting the paint.

Industrial applicability

[280] Sequence table free content

Claims

Claim

[Claim 1] A UV coating for surface coating of magnesium aluminum alloy, the coating comprising a primer coating, a medium coating and a top coating, characterized in that: the primer coating comprises components and weight distribution The ratio is as follows: Primer: Curing agent: Thinner = 100: 33: (25 -40); The composition and weight ratio of the medium paints included are: Medium paint: Curing agent: Thinner = 100: 5: (80-120); The topcoat comprises the components and weight ratio: Topcoat: Thinner = 100: (15 -30).

[Claim 2] The UV coating for surface spraying of magnesium aluminum alloy according to claim 1, wherein: the composition and weight ratio range (%) of the primer are:

Epoxy resin 10-25 %

Additive 0.5-2 %

Talc 5-20%

Carbon black 1-6 %

Bisphenol 10-25%

Solvent 33-73% ;

The composition and weight ratio range (%) of the primer curing agent are:

Polyamide resin 35-60%

Additive 0.5-2%

Solvent 38-64% ;

The composition and weight ratio range (%) of the primer diluent are:

Alcohol solvent 20-50%

Aromatic solvent 20-40%

Ester solvent 20-60%.

[Claim 3] The UV coating for surface spraying of magnesium aluminum alloy according to claim 2, wherein: the composition and weight ratio range (%) of the medium paint is:

Vinyl resin 5-20%

Acrylic resin 5-20%

Additive 0.5-3% Carbon black 0.1-1%

Solvent 56-80% ;

The composition and weight ratio range (%) of the medium paint curing agent is:

Polyhexamethylene diisocyanate 40-70%

Solvent 30-60% ;

The composition and weight ratio range (%) of the lacquer thinner is:

Ketone solvent 70-90%

Alcohol solvent 10-30%.

The UV coating for surface spraying of magnesium aluminum alloy according to claim 3, wherein: the composition and weight ratio range (%) of the top coat are:

Acrylic resin 32-59%

Additive 1-5%

Solvent 36-65% ;

The composition and weight ratio range (%) of the topcoat thinner is:

Ketone solvent 45-70%

Alcohol solvent 30-50%.

The UV coating for surface spraying of magnesium aluminum alloy according to claim 2, wherein: the epoxy resin means two or more epoxy groups, and is aliphatic, alicyclic or aromatic. An organic oligomer such as a group is a macromolecular oligomer which is a skeleton and can react with an epoxy group to form a useful thermosetting product.

The UV coating for surface spraying of magnesium aluminum alloy according to claim 5, wherein: the polyamide resin refers to a low polycondensation of a dimeric vegetable oil fatty acid and a fatty amine of the 650, 651, and 300# models. molecule.

The UV coating for surface spraying of a magnesium aluminum alloy according to claim 2, 3 or 4, wherein the additive is a leveling agent, an antifoaming agent or a dispersing agent. The UV coating for surface spraying of magnesium aluminum alloy according to claim 3, wherein: the vinyl resin refers to a polymer resin prepared by self-polymerization or copolymerization of an ethylene derivative monomer containing a double bond. . A UV coating for surface spraying of magnesium aluminum alloy according to claim 3 or 4, wherein: said acrylic resin is a homopolymer and a copolymer of (meth)acrylic acid and a derivative.