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.