CN106811058B - Coatings and its preparation method and application - Google Patents

Coatings and its preparation method and application Download PDF

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Publication number
CN106811058B
CN106811058B CN201710001025.7A CN201710001025A CN106811058B CN 106811058 B CN106811058 B CN 106811058B CN 201710001025 A CN201710001025 A CN 201710001025A CN 106811058 B CN106811058 B CN 106811058B
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parts
coatings
organotin
saturated polyester
diluent
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CN106811058A (en
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熊非常
王卫国
周长胜
李平
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Matsui New Materials Group Co ltd
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Hunan Matsui New Materials Ltd By Share Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • C09D175/06Polyurethanes from polyesters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/04Carbon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/34Silicon-containing compounds
    • C08K3/36Silica
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D17/00Pigment pastes, e.g. for mixing in paints
    • C09D17/004Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
    • C09D17/005Carbon black
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a kind of coatings, including following components: 40~70 parts of saturated polyester, 12~25 parts of black slurry, 0.1~1 part of organotin surface layer drier, 0.1~1 part of organotin deep layer drier, 0.1~1 part of levelling agent, 2~7 parts of fumed silica, 5~20 parts of diluent, 1~8 part of metal adhesion promotor, above in parts by weight, the coatings insulation effect and covering effect are good, and coating is thin.The preparation method of the coatings is additionally provided, after saturated polyester, black slurry, organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion promotor, diluent are mixed, fumed silica is added, obtains coatings;The raw material of the preparation method is common to be easy to get, easy to operate.Application of the coatings on electronic product is additionally provided, is mixed using the preceding polyisocyanate that is first added, which saves manpower and time, save the cost.

Description

Coatings and its preparation method and application
Technical field
The present invention relates to paint fields, particularly, are related to a kind of coatings, further relate to coatings preparation method and Using.
Background technique
Have many coatings on the market now, the coating of these coatings is thicker when coating, can be only achieved compared with Good insulation effect, therefore most of coatings all can be only applied in the large-scale devices such as motor, and accurate electronic product There is very big limitation for the thickness of coatings, applicable coatings are seldom, such as apply the coatings on mobile phone non- Often less, such as the insulation processing of current Mobile phone shielding case develops suitable coating not yet.Mobile phone shielding case be by component, Circuit, sub-assembly, cable or whole system interference source be surrounded to prevent a kind of important member of the electromagnetic field to external diffusion Part.Shielding case can all be carried out insulation processing by general mobile phone, and traditional way is the artificial insulating paper for pasting black import, the party Method is at high cost, and heavy workload takes time and effort.Therefore, a kind of novel coatings are studied, can be applied to the electricity of similar mobile phone It is a problem to be solved on sub- product.
Summary of the invention
The present invention provides a kind of coatings and its preparation method and application, to solve the painting thickness of coatings, hide Lid effect is bad and electronic product does not have suitable coatings or it is at high cost to be caused using insulating methods such as insulating papers, Heavy workload, the technical issues of taking time and effort.
The technical solution adopted by the invention is as follows:
A kind of coatings, including following components: 40~70 parts of saturated polyester, 12~25 parts of black slurry, organotin surface layer 0.1~1 part of drier, 0.1~1 part of organotin deep layer drier is 0.1~1 part of levelling agent, 2~7 parts of fumed silica, dilute Release 5~20 parts of agent, 1~8 part of metal adhesion promotor, it is above in parts by weight.
Further, including following components: 60 parts of saturated polyester, 20 parts of black slurry, 0.4 part of organotin surface layer drier, 0.2 part of organotin deep layer drier, 0.2 part of levelling agent, 4 parts of fumed silica, 12.2 parts of diluent, metal adhesion promotes 3 parts of agent, it is above in parts by weight.
Further, black slurry includes following components: 30~60 parts of saturated polyester, 5~12 parts of carbon black disperser, and carbon black 10 ~20 parts, 20~40 parts of diluent, it is above in parts by weight.
Further, black slurry includes following components: 47 parts of saturated polyester, 9 parts of carbon black disperser, and 14 parts of carbon black, dilution 32 parts of agent, it is above in parts by weight.
Further, saturated polyester is the linear saturated polyester that molecular weight is greater than 10000;And/or diluent is diacetone One of alcohol, methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, ethyl acetate are a variety of.
Further, carbon black is insulation carbon black, specific surface area 120m2/ g~350m2/g。
According to another aspect of the present invention, the preparation method of above-mentioned coatings is additionally provided, comprising the following steps:
(1) saturated polyester, black slurry, organotin surface layer drier, organotin deep layer drier, levelling agent, metal is attached It is stirred after adhesion promoter, diluent mixing, obtains mixture A;
(2) it incorporates fumed silica into the mixture A that step (1) obtains and stirs, obtain coatings.
Further, in step (1), the condition of stirring are as follows: whipping temp is 20 DEG C~40 DEG C, mixing speed 400r/ Min~600r/min, mixing time are 10min~15min;In step (2), the condition of stirring are as follows: whipping temp is constant, stirring Speed is 2000r/min~2500r/min, and mixing time is 20min~30min.
Further, black slurry preparation the following steps are included:
(a) saturated polyester, carbon black disperser, diluent are mixed, temperature is 20 DEG C~40 DEG C, mixing speed is 10min~15min is stirred under 400r/min~600r/min, obtains mixture B;
(b) carbon black is added in mixture B made from step (a), stirs 10min~15min, mixing speed is 800r/min~1200r/min obtains black slurry.
According to another aspect of the present invention, application of the above-mentioned coatings on electronic product is additionally provided, using including It is used after coatings are mixed with polyisocyanate or modified polyisocyanate.
Further, coatings are applied before on electronic product, and 7~15 parts of polyisocyanate or modified poly- are first added Isocyanates stirs after mixing, the condition of stirring: mixing speed be 100r/min~300r/min, mixing time be 5min~ 6min;It sprays or is printed on the substrate of electronic product after being sufficiently mixed, obtain product after 0 DEG C~85 DEG C baking-curings.
In coatings of the invention, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, To common plastics and metal adhesive force with super strength;It, will not due to not containing unsaturated carbon-carbon double bond in molecular backbone Π-Π conjugated structure is formed, does not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, and inside configuration is avoided to collapse It collapses and causes defect, insulation performance can be further increased.
The carbon black that the present invention uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness is high, hides Gai Liqiang, heat resistance be good, good insulating.
Fumed silica of the invention plays effective photoextinction in film, can make to spray or print insulation painting Sample after material reaches ideal appearance and feel.
Auxiliary agent of the invention includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion rush Into agent, for adjusting the performance and appearance of paint film.
Diluent of the invention is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
Coatings of the invention can react solidification, baking temperature with polyisocyanate or modified polyisocyanate curing agent 0 DEG C~85 DEG C of degree is curable.
After the toasted solidification of coatings of the invention, the linear saturated polyester of high molecular weight and polyisocyanate or modification Polyisocyanate occurs addition reaction and forms network cross-linked structure, and high blackness carbon black and fumed silica can closely be embedded in painting In layer, therefore the insulation coating of available high covering power, scumbling (9 μm~10 μm).
The invention has the following advantages:
1, coatings insulation effect of the invention and covering effect are good, and the thickness for needing to coat is thin, can be applied to each Plant the insulation processing of common plastic material (such as PC, PMMA, ABS), metal (stainless steel, magnesium alloy, aluminium alloy) surface;This The thickness of the coatings coating of invention is thin, thus is suitable for accurate electronic product, make electronic product do not need to reuse it is viscous The insulating methods such as insulating paper are pasted, cost reduces, reduces workload, save manpower and time.
2, the preparation method of coatings of the invention, raw material is common to be easy to get, easy to operate, it is easy to accomplish.
3, the application method of coatings of the invention on electronic product shielding case is simple, and spraying or printing can be real It is existing, it does not need manually to paste insulating paper, save manpower and time, save the cost.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention. The present invention is further detailed explanation below.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
In following embodiment, high molecular weight saturated polyester resin creates Degussa, model Dynapol L411 purchased from winning; Carbon black dispersant with high efficiency, purchased from B Bi Ke chemistry, model BYK163;High blackness insulation carbon black, creates Degussa, model purchased from winning For the goth black Special Black 4A of carbon black;Polyisocyanate can be common all kinds of polyisocyanate, can be but not office It is limited to the model N-75, L-75, N3390 of Bayer;Special auxiliary agent include organotin surface layer drier, organotin deep layer drier, The various auxiliary agents that levelling agent, metal adhesion promotor are known to the skilled person can be bought from Japanese Supreme Being Si Balong, Dow corning, one or more of auxiliary agents series of products such as German Bi Ke chemistry;Fumed silica is the skill of this field Powder well known to art personnel can buy the AEROSILR972 from German Degussa, in AEROSILR202, AEROSIL R816 One or more of silica;Diluent be diacetone alcohol, methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, One of ethyl acetate is a variety of, is that analysis is pure commercially available.
Embodiment 1
A kind of coatings are present embodiments provided, referring to shown in table 1, including following components, it is 70 parts of saturated polyester, black 15 parts of mill base, 1 part of organotin surface layer drier, 1 part of organotin deep layer drier is 1 part of levelling agent, 7 parts of fumed silica, dilute Release 20 parts of agent, diluent includes 1 part of diacetone alcohol, and 1 part of methyl iso-butyl ketone (MIBK), 4 parts of propylene glycol methyl ether acetate, butyl acetate 12 Part, 2 parts of ethyl acetate;8 parts of metal adhesion promotor, it is above in parts by weight.
In the coatings of the present embodiment, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, to common plastics and metal adhesive force with super strength;It is double due to not containing unsaturated carbon carbon in molecular backbone Key not will form Π-Π conjugated structure, not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, avoids tying It collapses inside structure and causes defect, insulation performance can be further increased.
The carbon black that the present embodiment uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness height, Strong covering power, heat resistance be good, good insulating.
The fumed silica of the present embodiment plays effective photoextinction in film, can make to spray or print insulation Sample after coating reaches ideal appearance and feel.
The auxiliary agent of the present embodiment includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion Promotor, for adjusting the performance and appearance of paint film.
The diluent of the present embodiment is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
The coatings of the present embodiment carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of the present embodiment can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Table 1: the formula (parts by weight) of coatings in Examples 1 to 5
In the present embodiment, made the sample of 3 kinds of black slurries, respectively sample 1, sample 2 and sample 3,3 kinds of samples it is black For mill base at being grouped as referring to table 2, diluent used is propylene glycol methyl ether acetate and butyl acetate, carbon black be through peroxidating at The super-normal structure black of reason.The preparation method of black slurry is as follows, prepares 3 kinds of samples respectively.
(a) saturated polyester, carbon black disperser, diluent are mixed according to the ratio in table 2 respectively, in above-mentioned 3 kinds of samples, Diluent used is propylene glycol methyl ether acetate and butyl acetate, is stirred in the case where temperature is 30 DEG C, mixing speed is 500r/min 12min is mixed, mixture B is obtained;
(b) carbon black of ratio in table 2 is added in mixture B made from step (a), stirs 12min, mixing speed is 1000r/min;Then high speed vibrating machine continuous shaking 48h is used, disperses carbon black substantially uniformity, obtains black slurry.
Table 2: the formula (parts by weight) of black slurry in embodiment 1:
Sample serial number 1 2 3
Saturated polyester resin 30 47 60
Carbon black disperser 12 9 5
Carbon black 20 14 10
Propylene glycol methyl ether acetate 15 10 10
Butyl acetate 25 22 10
In addition, comparing for convenience, two kinds of contrast samples of black slurry are made, contrast sample 1 and the ingredient of sample 1 are big Cause identical, difference is: the additional amount of saturated polyester is 29 parts by weight;Contrast sample 2 is roughly the same with the ingredient of sample 3, area Be not: the additional amount of saturated polyester is 61 parts by weight.
It is obtained after sample 1,2 and 3 and contrast sample 1 and 2 are carried out mill base performance test respectively, it was concluded that referring to table 3, Powder amount too high levels in sample 1 and contrast sample 1, mobility is poor, and fineness is unqualified after grinding;Sample 3 and contrast sample 2 Blackness it is too low, hiding lack.Therefore the best performance of 2 black slurry of sample selects black slurry samples 2 to carry out in embodiment 1 The preparation of coatings.
Table 3: black slurry the performance test results
Test item (testing tool or method) Mill base sample 1 Mill base sample 2 / mill base sample 3
Fineness (Hegman grind gage) 15um, NG < 10um, OK < 10um, OK
Viscosity (stormer viscosity meter) 124KU 98KU 76KU
Covering power (covering power paper method of testing) OK OK It shows money or valuables one carries unintentionally, NG
In the present embodiment coatings the preparation method is as follows:
(1) by saturated polyester, black slurry samples 2, organotin surface layer drier, organotin deep layer drier, levelling agent, gold Belong to adhesion promoter, diluent respectively according in table 1 ratio mix, diluent include diacetone alcohol, methyl iso-butyl ketone (MIBK), Propylene glycol methyl ether acetate, butyl acetate, ethyl acetate, stir 12min at 30 DEG C, and mixing speed 500r/min is obtained Mixture A;
(2) fumed silica of ratio in table 1 is added in the mixture A that step (1) obtains and stirs 25min, stirred Mixing speed is 2500r/min, obtains coatings.
Embodiment 2
A kind of coatings are present embodiments provided, referring to shown in table 1, including following components, it is 60 parts of saturated polyester, black 20 parts of mill base, 0.4 part of organotin surface layer drier, 0.2 part of organotin deep layer drier, 0.2 part of levelling agent, fumed silica 4 parts, 12.2 parts of diluent, diluent includes 2.5 parts of diacetone alcohol, and 1.2 parts of methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate 1.2 parts, 5 parts of butyl acetate, 2.3 parts of ethyl acetate;3 parts of metal adhesion promotor, it is above in parts by weight.
In the coatings of the present embodiment, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, to common plastics and metal adhesive force with super strength;It is double due to not containing unsaturated carbon carbon in molecular backbone Key not will form Π-Π conjugated structure, not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, avoids tying It collapses inside structure and causes defect, insulation performance can be further increased.
The carbon black that the present embodiment uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness height, Strong covering power, heat resistance be good, good insulating.
The fumed silica of the present embodiment plays effective photoextinction in film, can make to spray or print insulation Sample after coating reaches ideal appearance and feel.
The auxiliary agent of the present embodiment includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion Promotor, for adjusting the performance and appearance of paint film.
The diluent of the present embodiment is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
The coatings of the present embodiment carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of the present embodiment can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in the present embodiment The preparation method of coating, it is in the same manner as in Example 1.
Embodiment 3
A kind of coatings are present embodiments provided, referring to shown in table 1, including following components, it is 50 parts of saturated polyester, black 22 parts of mill base, 0.5 part of organotin surface layer drier, 0.3 part of organotin deep layer drier, 0.4 part of levelling agent, fumed silica 2 parts, 10 parts of diluent, diluent includes 1 part of methyl iso-butyl ketone (MIBK), and 2 parts of propylene glycol methyl ether acetate, 5 parts of butyl acetate, acetic acid 2 parts of ethyl ester;4 parts of metal adhesion promotor, it is above in parts by weight.
In the coatings of the present embodiment, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, to common plastics and metal adhesive force with super strength;It is double due to not containing unsaturated carbon carbon in molecular backbone Key not will form Π-Π conjugated structure, not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, avoids tying It collapses inside structure and causes defect, insulation performance can be further increased.
The carbon black that the present embodiment uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness height, Strong covering power, heat resistance be good, good insulating.
The fumed silica of the present embodiment plays effective photoextinction in film, can make to spray or print insulation Sample after coating reaches ideal appearance and feel.
The auxiliary agent of the present embodiment includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion Promotor, for adjusting the performance and appearance of paint film.
The diluent of the present embodiment is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
The coatings of the present embodiment carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of the present embodiment can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in the present embodiment The preparation method of coating, it is in the same manner as in Example 1.
Embodiment 4
A kind of coatings are present embodiments provided, referring to shown in table 1, including following components, it is 40 parts of saturated polyester, black 12 parts of mill base, 0.1 part of organotin surface layer drier, 0.1 part of organotin deep layer drier, 0.1 part of levelling agent, fumed silica 5 parts, 5 parts of diluent, diluent includes 1 part of propylene glycol methyl ether acetate, 4 parts of butyl acetate;1 part of metal adhesion promotor, Above in parts by weight.
In the coatings of the present embodiment, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, to common plastics and metal adhesive force with super strength;It is double due to not containing unsaturated carbon carbon in molecular backbone Key not will form Π-Π conjugated structure, not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, avoids tying It collapses inside structure and causes defect, insulation performance can be further increased.
The carbon black that the present embodiment uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness height, Strong covering power, heat resistance be good, good insulating.
The fumed silica of the present embodiment plays effective photoextinction in film, can make to spray or print insulation Sample after coating reaches ideal appearance and feel.
The auxiliary agent of the present embodiment includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion Promotor, for adjusting the performance and appearance of paint film.
The diluent of the present embodiment is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
The coatings of the present embodiment carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of the present embodiment can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in the present embodiment The preparation method of coating, it is in the same manner as in Example 1.
Embodiment 5
A kind of coatings are present embodiments provided, referring to shown in table 1, including following components, it is 55 parts of saturated polyester, black 25 parts of mill base, 0.3 part of organotin surface layer drier, 0.4 part of organotin deep layer drier, 0.5 part of levelling agent, fumed silica 3 parts, 20 parts of diluent, diluent includes 4 parts of diacetone alcohol, and 1 part of methyl iso-butyl ketone (MIBK), 3 parts of propylene glycol methyl ether acetate, acetic acid 8 parts of butyl ester, 4 parts of ethyl acetate;2 parts of metal adhesion promotor, it is above in parts by weight.
In the coatings of the present embodiment, saturated polyester is the linear saturated polyester of high molecular weight, and molecular weight is greater than 10000, to common plastics and metal adhesive force with super strength;It is double due to not containing unsaturated carbon carbon in molecular backbone Key not will form Π-Π conjugated structure, not have conductive structure;And molecular weight is high, and volume contraction is small after film forming, avoids tying It collapses inside structure and causes defect, insulation performance can be further increased.
The carbon black that the present embodiment uses is high blackness insulation carbon black, specific surface area 120m2/ g~350m2/ g, blackness height, Strong covering power, heat resistance be good, good insulating.
The fumed silica of the present embodiment plays effective photoextinction in film, can make to spray or print insulation Sample after coating reaches ideal appearance and feel.
The auxiliary agent of the present embodiment includes organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion Promotor, for adjusting the performance and appearance of paint film.
The diluent of the present embodiment is added according to the above ratio, avoids coatings excessively dilute or feeding-up, facilitates paint film levelling.
The coatings of the present embodiment carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of the present embodiment can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in the present embodiment The preparation method of coating, it is in the same manner as in Example 1.
Comparative example 1
This comparative example provides a kind of coatings, including following components, 71 parts of saturated polyester, 13 parts of black slurry, organic 1 part of tin surface layer drier, 1 part of organotin deep layer drier, 1 part of levelling agent, 5 parts of fumed silica, 20 parts of diluent, dilution Agent includes 1 part of diacetone alcohol, and 1 part of methyl iso-butyl ketone (MIBK), 4 parts of propylene glycol methyl ether acetate, 12 parts of butyl acetate, ethyl acetate 2 Part;8 parts of metal adhesion promotor, it is above in parts by weight.This comparative example is roughly the same with embodiment 1, is distinguished as Saturated polyester, black slurry, the content of fumed silica.
The coatings of this comparative example carry out covering power test with covering power paper, and test result shows covering power NG.
The coatings of this comparative example can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in this comparative example The preparation method of coating, it is in the same manner as in Example 1.
Comparative example 2
This comparative example provides a kind of coatings, referring to shown in table 1, including following components, it is 39 parts of saturated polyester, black 20 parts of mill base, 0.1 part of organotin surface layer drier, 0.1 part of organotin deep layer drier, 0.1 part of levelling agent, fumed silica 6 parts, 5 parts of diluent, diluent includes 1 part of propylene glycol methyl ether acetate, 4 parts of butyl acetate;1 part of metal adhesion promotor, Above in parts by weight.This comparative example is roughly the same with embodiment 4, is distinguished as saturated polyester, black slurry, gas phase dioxy The content of SiClx.
The coatings of this comparative example carry out covering power test with covering power paper, and test result shows covering power OK.
The coatings of this comparative example can react solidification with polyisocyanate, in other embodiments can also be with modification Polyisocyanate reaction solidifies, and solidifies at 80 DEG C of baking temperature, and baking temperature, which is 0 DEG C~85 DEG C, in other embodiments can consolidate Change.
Also black slurry samples 2 is selected to carry out the preparation of coatings, the preparation method and insulation of black slurry in this comparative example The preparation method of coating, it is in the same manner as in Example 1.
Embodiment 6
In the coatings that Examples 1 to 5 and comparative example 1,2 are prepared, polyisocyanate is added referring to the ratio of table 1 Modified polyisocyanate can also be added in ester in other embodiments, the polyisocyanate parts by weight being wherein added in comparative example 1 Identical as the addition of embodiment 1, identical, stirring is added with embodiment 4 for the polyisocyanate parts by weight being added in comparative example 2 5min, mixing speed 200r/min, whipping temp are 30 DEG C, obtain mixture, mixture is sprayed on stainless steel substrate, Coating with a thickness of 10 μm, 80 DEG C of baking 25min, respectively obtain spraying sample in an oven.
After the toasted solidification of the coatings of the present embodiment, the linear saturated polyester of high molecular weight and polyisocyanate occur Addition reaction forms network cross-linked structure, and high blackness carbon black and fumed silica can closely inlay in the coating, therefore can be with Obtain the insulation coating of high covering power, scumbling (10 μm).
The coatings of Examples 1 to 5 and comparative example 1,2 are sprayed to the spraying sample difference obtained on stainless steel substrate Adhesive force test, electrical breakdown test, boiling test, high temperature and humidity test, cooling thermal impact test are carried out, detection method is as follows, inspection The results are shown in Table 4 for survey.
Adhesive force test: GB9286-1998 standard testing is pressed.
Electrical breakdown test: the computerized control test of voltage breakdown determining instrument (model HJC-5KV, Jilin Province Hua Yang are adopted Equipment Co., Ltd together), voltage rises to always until puncturing coating from 0 volt, and voltage when puncturing coating is recorded as puncturing Voltage.
Boiling test: impregnating 30 minutes in 85 DEG C of water-bath, then observes coating surface situation and carries out adhesive force Test.
High temperature and humidity test: it is placed in 85 DEG C, the climatic chamber of humidity 85% 500 hours, then observes coating table Face situation simultaneously carries out adhesive force test.
Cooling thermal impact test: saving 5 hours again at 85 DEG C after saving 5 hours at -40 DEG C and recycle for one, total to do 50 Then circulation observes coating surface situation and carries out adhesive force test.
Table 4: the performance test results of Examples 1 to 5 and comparative example 1,2
From the test result of the above various embodiments, comparative example and table 4 it is found that the covering power of the spraying sample of Examples 1 to 5 It is all OK, and breakdown voltage is all in 500V or more;And the spraying sample covering power that comparative example 1 obtains is too poor, comparative example 2 The spraying sample breakdown voltage arrived is much smaller than 500V.Illustrate to have according to coatings made from proportion provided by the invention excellent Covering power and insulation performance, wherein the coatings of embodiment 2 be sprayed at obtained on stainless steel substrate spraying sample property Can be best, it is most highly preferred embodiment of the invention.
The coatings of embodiment 2 are sprayed at the spraying sample properties test whole OK obtained on stainless steel substrate, And breakdown voltage is more than 550V, can substitute insulation paster completely in implementing use.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (8)

1. a kind of coatings, which is characterized in that including following components:
40~70 parts of saturated polyester,
12~25 parts of black slurry,
0.1~1 part of organotin surface layer drier,
0.1~1 part of organotin deep layer drier,
0.1~1 part of levelling agent,
2~7 parts of fumed silica,
5~20 parts of diluent,
1~8 part of metal adhesion promotor,
Above in parts by weight, the saturated polyester is the linear saturated polyester that molecular weight is greater than 10000;
The black slurry includes following components: 47 parts of saturated polyester, 9 parts of carbon black disperser, 14 parts of carbon black, 32 parts of diluent.
2. coatings according to claim 1, which is characterized in that including following components:
60 parts of saturated polyester,
20 parts of black slurry,
0.4 part of organotin surface layer drier,
0.2 part of organotin deep layer drier,
0.2 part of levelling agent,
4 parts of fumed silica,
12.2 parts of diluent,
3 parts of metal adhesion promotor,
Above in parts by weight.
3. coatings described according to claim 1~any one of 2, which is characterized in that
The diluent is diacetone alcohol, in methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, ethyl acetate It is one or more.
4. coatings described according to claim 1~any one of 2, which is characterized in that
The carbon black is insulation carbon black, specific surface area 120m2/ g~350m2/g。
5. the preparation method of coatings as described in any one of claims 1 to 4, which comprises the following steps:
(1) by saturated polyester, black slurry, organotin surface layer drier, organotin deep layer drier, levelling agent, metal adhesion It is stirred after promotor, diluent mixing, obtains mixture A;
(2) it incorporates fumed silica into the mixture A that the step (1) obtains and stirs, obtain the coatings.
6. the preparation method of coatings according to claim 5, which is characterized in that
In the step (1), the condition of stirring are as follows: whipping temp is 20 DEG C~40 DEG C, and mixing speed is 400r/min~600r/ Min, mixing time are 10min~15min;
In the step (2), the condition of stirring are as follows: whipping temp is constant, and mixing speed is 2000r/min~2500r/min, stirs Mixing the time is 20min~30min.
7. the preparation method of coatings according to claim 5 or 6, which is characterized in that
The preparation of the black slurry the following steps are included:
(a) saturated polyester, carbon black disperser, diluent are mixed, is 20 DEG C~40 DEG C, mixing speed 400r/min in temperature 10min~15min is stirred under~600r/min, obtains mixture B;
(b) carbon black is added in mixture B made from the step (a), stirs 10min~15min, mixing speed is 800r/min~1200r/min obtains the black slurry.
8. coatings as described in any one of claims 1 to 4 or the preparation as described in any one of claim 5~7 Application of the coatings that method is prepared on electronic product, which is characterized in that the application includes applying the insulation Material uses after being mixed with polyisocyanate or modified polyisocyanate.
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CN107400447A (en) * 2017-08-13 2017-11-28 安徽康瑞高科新材料技术工程有限公司 A kind of mute black coatings of mobile phone inner member
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CN101469248A (en) * 2007-12-30 2009-07-01 比亚迪股份有限公司 Bicomponent polyurethane coating and preparation thereof
CN102746725A (en) * 2012-06-29 2012-10-24 宝山钢铁股份有限公司 Silicon steel water-soluble environment-friendly super thick insulating coating and preparation method thereof
CN105176344A (en) * 2015-08-06 2015-12-23 镇江恒兴源节能科技有限公司 Water-based polyurethane insulating paint and preparation method thereof

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CN102746725A (en) * 2012-06-29 2012-10-24 宝山钢铁股份有限公司 Silicon steel water-soluble environment-friendly super thick insulating coating and preparation method thereof
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