CN113956703A - High-temperature conductive putty for powder spraying - Google Patents
High-temperature conductive putty for powder spraying Download PDFInfo
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- CN113956703A CN113956703A CN202111108338.5A CN202111108338A CN113956703A CN 113956703 A CN113956703 A CN 113956703A CN 202111108338 A CN202111108338 A CN 202111108338A CN 113956703 A CN113956703 A CN 113956703A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
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Abstract
The invention belongs to the field of coatings, and particularly relates to high-temperature conductive atomic ash for powder spraying, which comprises basic atomic ash, carbon powder and graphite fiber; the weight of the carbon powder is 2-5% of that of the basic atomic ash; the weight of the graphite fiber is 1-2% of the weight of the basic atomic ash. The atomic ash adopts carbon powder and graphite fiber, the graphite fiber is used as a conductive framework, the carbon powder is used as a conductive dispersion body, the conductivity of the atomic ash can be improved, meanwhile, the graphite fiber has the advantages of high strength and high modulus, the structural stability of the bottom layer of the atomic ash can be maintained in a high-temperature state, and the structural strength and the conductivity of the high-temperature atomic ash under the high-temperature condition can be improved.
Description
Technical Field
The invention relates to the field of coatings, in particular to high-temperature conductive putty for powder spraying.
Background
CN201410227150.6 discloses a conductive putty, which is composed of common putty, a first curing agent and carbon black according to the following weight proportion: 50-100 parts of common atomic ash, 30-60 parts of carbon black and 10-15 parts of first curing agent; the first curing agent is one of 1031, 1182 and 623P.
Preparation of conductive atomic ash is mostly realized by adding carbon black and metal powder in the field.
However, whatever powder is used, the electrical conductivity of the atomic ash is not so good, as it results from the fact that no conductive network is formed within the atomic ash.
In the powder spraying process, the bottom atomic ash needs to meet at least three requirements, namely first conductivity; secondly, the structural strength is appropriate; and thirdly, the volatile material of the micromolecule is less. The conductivity determines the effectiveness and uniformity of powder spray; the structural strength determines the stability of the powder coating during the high-temperature baking process; the small molecular volatile matter is less, so that the foam grey hole of the powder coating can be obviously reduced.
The technical problem that this application will solve is: how to improve the structural strength and the electrical conductivity of the high-temperature atomic ash for powder spraying under high-temperature conditions.
Disclosure of Invention
The invention aims to provide high-temperature conductive putty for powder spraying, which adopts carbon powder and graphite fiber, wherein the graphite fiber is used as a conductive framework, the carbon powder is used as a conductive dispersion body, the conductivity of the putty can be improved, meanwhile, the graphite fiber has the advantages of high strength and high modulus, and the high-temperature conductive putty can keep the structural stability of a bottom layer of the putty in a high-temperature state, so that the structural strength and the conductivity of the high-temperature putty under the high-temperature condition are improved.
Unless otherwise specified, the percentages and parts in the present invention are in weight percent.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-temperature conductive atomic ash for powder spraying comprises basic atomic ash, carbon powder and graphite fiber;
the weight of the carbon powder is 2-5% of that of the basic atomic ash;
the weight of the graphite fiber is 1-2% of the weight of the basic atomic ash.
In the high-temperature conductive atomic ash for powder spraying, the carbon powder is spherical nano carbon powder with the diameter of 20-50 nm.
In the high-temperature conductive atomic ash for powder spraying, the diameter of the graphite fiber is 3-10 mu m, and the length-diameter ratio is 2-4.
In the high-temperature conductive atomic ash for powder spraying, the basic atomic ash comprises a component A and a component B, wherein the component A consists of polyester resin, organic silicon resin, novolac epoxy resin modified vinyl ester resin, a dispersing agent, a stabilizing agent, a diluting agent and a filler; the component B is a curing agent;
the diluent accounts for 5-10% of the total weight of the component A;
dividing the diluent into two parts, adding carbon powder into one part of the diluent, and adding graphite fiber into the other part of the diluent;
polyester resin, a dispersing agent and a stabilizing agent are mixed in advance to obtain a mixture, then two portions of a diluting agent mixed with carbon powder and graphite fiber are added into the mixture simultaneously or sequentially, the filling material is added after stirring and dispersing, and the mixture is stirred continuously and uniformly.
In the high-temperature conductive atomic ash for powder spraying, the solid content of the polyester resin is 65 percent, the weight of the polyester resin is 22 to 33 percent of that of the component A, the weight of the organic silicon resin is 1 to 2 percent of that of the component A, and the weight of the novolac epoxy resin modified vinyl ester resin is 3 to 6 percent of that of the component A; the weight of the dispersant is 0.4-0.8% of that of the component A; the weight of the stabilizer is 0.06-0.1% of the weight of the component A.
In the high-temperature conductive putty for powder spraying, the dispersant is an ammonium salt dispersant for paint, and the stabilizer is
The filler is talcum powder.
In the high-temperature conductive putty for powder spraying, the diluent is styrene.
In the high-temperature conductive atomic ash for powder spraying, the diluent is divided into two parts, namely a first diluent and a second diluent, wherein the weight ratio of the first diluent to the second diluent is 1: 2-3;
dispersing carbon powder into a first diluent; the graphite fibers are dispersed in a second diluent.
Adding a silane coupling agent KH550 which is 10-15% of the weight of the graphite fiber into the second diluent in the high-temperature conductive atomic ash for powder spraying; ultrasonic and mechanical stirring are also assisted in the graphite fiber dispersing process; the ultrasonic power is not lower than 800w, and the ultrasonic and stirring time is not lower than 10 min.
In the high-temperature conductive atomic ash for powder spraying, the process of dispersing carbon powder into the first diluent is assisted by ultrasonic and mechanical stirring; the ultrasonic power is not lower than 800w, and the ultrasonic and stirring time is not lower than 10 min. .
Compared with the prior art, the invention has the beneficial effects that:
the atomic ash adopts carbon powder and graphite fiber, the graphite fiber is used as a conductive framework, the carbon powder is used as a conductive dispersion body, the conductivity of the atomic ash can be improved, meanwhile, the graphite fiber has the advantages of high strength and high modulus, the structural stability of the bottom layer of the atomic ash can be maintained in a high-temperature state, and the structural strength and the conductivity of the high-temperature atomic ash under the high-temperature condition are improved.
Drawings
FIG. 1 is a graph showing the effect of the putty of comparative example 1 applied to powder coating of automobiles;
FIG. 2 is a graph showing the effect of the putty of example 1 applied to powder coating of automobiles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1 preparation of high temperature conductive putty
Step 1: polyester resin (refer to the preparation method shown in the prior application ZL201911073693.6 example 1 of the company), silicone resin (SILRES IC605), 907 novolac epoxy resin modified vinyl ester resin, dispersant (ammonium salt dispersant for coating), and stabilizer
Mixing;
step 2: adding nano carbon powder into 30% of diluent, stirring and dispersing, adding graphite fiber into the rest diluent, stirring and dispersing;
the carbon powder is spherical nanometer carbon powder with the diameter of 20-50 nm; the specifications of the graphite fiber are as follows: the diameter is 3-10 μm, and the length-diameter ratio is 2-4.
And step 3: synchronously adding the diluent treated in the step 2 into the mixture in the step 1, mixing, and stirring for 30-60 minutes;
and 4, step 4: adding talcum powder as filler and stirring for 30-60 min;
and 5: vacuumizing for 20 minutes;
in the construction process, a curing agent is added, wherein the A, B component is in a ratio of 100:2, and the curing agent is cyclohexanone peroxide. The proportion of the AB component and the selection of the curing agent are common techniques in the art, and the appropriate curing agent and amount can be selected according to the type and amount of the basic atomic ash, and are not described below.
The amounts of the substances used in this example are shown in table 1 below:
table 1 formula table
Example 2
Essentially the same as example 1, except that the amounts of the materials used in this example are as follows in table 2:
table 2 formula table
Example 3
Essentially the same as example 1, except that the amounts of the various materials used in this example are as follows in table 3:
table 3 formula table
Example 4
The same as example 1 was true except that:
step 2: adding nano carbon powder into 30% of diluent, ultrasonically stirring and dispersing, adding graphite fiber and a silane coupling agent KH550 into the rest diluent, and ultrasonically stirring and dispersing;
the ultrasonic dispersion time is not less than 10 min; the power is not lower than 800 w;
the amounts of the substances used in this example are shown in Table 4 below:
table 4 formula table
Example 5
The same as example 1 was true except that:
step 2: adding nano carbon powder into 25% of diluent, ultrasonically stirring and dispersing, adding graphite fiber and a silane coupling agent KH550 into the rest diluent, and ultrasonically stirring and dispersing;
the ultrasonic dispersion time is not less than 10 min; the power is not lower than 800 w;
the amounts of the substances used in this example are shown in Table 5 below:
table 5 formula table
Example 6
Substantially the same as example 5, except that the formulation table is as follows 6:
table 6 formula table
Comparative example 1
The same as example 1, except for the formulation, which is shown in Table 7 below
Table 7 formula table
Performance testing
TABLE 8
Referring to fig. 1 and 2, fig. 1 and 2 show the effect of spraying the comparative example 1 and the example 1 on the same vehicle, one is at the front of the vehicle and the other is at the rear of the vehicle, so that the effect of powder spraying can be improved and the occurrence of gray marks can be avoided after the atomic ash of the example is adopted.
The reason for the existence of the grey print is caused by poor electric conductivity, which results in that the powder coating cannot be uniformly distributed on the surface of the base material based on static electricity, so that the natural color of atomic ash and solvent of the bottom layer can permeate into the surface of the powder coating, and the grey print is caused.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The high-temperature conductive atomic ash for powder spraying is characterized by comprising basic atomic ash, carbon powder and graphite fiber;
the weight of the carbon powder is 2-5% of that of the basic atomic ash;
the weight of the graphite fiber is 1-2% of the weight of the basic atomic ash.
2. The high-temperature conductive atomic ash for powder spraying as claimed in claim 1, wherein the carbon powder is spherical nano carbon powder with a diameter of 20-50 nm.
3. The high-temperature conductive putty for powder coating as set forth in claim 1 wherein the graphite fibers have a diameter of 3 to 10 μm and an aspect ratio of 2 to 4.
4. The high-temperature conductive atomic ash for powder spraying according to claim 1, wherein the basic atomic ash comprises a component A and a component B, wherein the component A is composed of polyester resin, silicone resin, novolac epoxy resin modified vinyl ester resin, dispersant, stabilizer, diluent and filler; the component B is a curing agent;
the diluent accounts for 5-10% of the total weight of the component A;
dividing the diluent into two parts, adding carbon powder into one part of the diluent, and adding graphite fiber into the other part of the diluent;
polyester resin, a dispersing agent and a stabilizing agent are mixed in advance to obtain a mixture, then two portions of a diluting agent mixed with carbon powder and graphite fiber are added into the mixture simultaneously or sequentially, the filling material is added after stirring and dispersing, and the mixture is stirred continuously and uniformly.
5. The high-temperature conductive atomic ash for powder spraying as claimed in claim 4, wherein the solid content of the polyester resin is 65%, the weight of the polyester resin is 22% -33% of the weight of the A component, the weight of the silicone resin is 1-2% of the weight of the A component, and the weight of the novolac epoxy resin modified vinyl ester resin is 3-6% of the weight of the A component; the weight of the dispersant is 0.4-0.8% of that of the component A; the weight of the stabilizer is 0.06-0.1% of the weight of the component A.
6. The high-temperature conductive putty as set forth in claim 5 wherein said composition is selected from the group consisting ofThe dispersant is ammonium salt dispersant for paint, and the stabilizer is
627AV, and the filler is talcum powder.
7. The high-temperature conductive putty for powder coating as set forth in claim 4 wherein the diluent is styrene.
8. The high-temperature conductive putty for powder spraying as claimed in claim 4, wherein the diluent is divided into two parts, namely a first diluent and a second diluent, and the weight ratio of the first diluent to the second diluent is 1: 2-3;
dispersing carbon powder into a first diluent; the graphite fibers are dispersed in a second diluent.
9. The high-temperature conductive putty as set forth in claim 8, wherein a silane coupling agent KH550 is added to the second diluent in an amount of 10-15% by weight based on the weight of the graphite fibers; ultrasonic and mechanical stirring are also assisted in the graphite fiber dispersing process; the ultrasonic power is not lower than 800w, and the ultrasonic and stirring time is not lower than 10 min.
10. The high-temperature conductive atomic ash for powder spraying as claimed in claim 9, wherein ultrasonic and mechanical stirring are also assisted in the process of dispersing the carbon powder into the first diluent; the ultrasonic power is not lower than 800w, and the ultrasonic and stirring time is not lower than 10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108338.5A CN113956703A (en) | 2021-09-22 | 2021-09-22 | High-temperature conductive putty for powder spraying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111108338.5A CN113956703A (en) | 2021-09-22 | 2021-09-22 | High-temperature conductive putty for powder spraying |
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| CN113956703A true CN113956703A (en) | 2022-01-21 |
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| CN202111108338.5A Pending CN113956703A (en) | 2021-09-22 | 2021-09-22 | High-temperature conductive putty for powder spraying |
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Citations (8)
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|---|---|---|---|---|
| CN87101955A (en) * | 1986-03-14 | 1988-02-10 | R·J雷诺兹烟草公司 | The method of the carbonaceous fuel of preparation smoking product and the product of making thus |
| RU2219212C1 (en) * | 2002-09-19 | 2003-12-20 | Открытое акционерное общество "Белкард" | Composition material for tribotechnical coatings |
| CN1664038A (en) * | 2005-03-09 | 2005-09-07 | 哈尔滨工业大学 | Alloy putty |
| CN102086338A (en) * | 2010-12-22 | 2011-06-08 | 浙江工业大学 | Vinyl ester resin carbon series conductive paint with high corrosion resistance and heat resistance and preparation method thereof |
| CN103992679A (en) * | 2014-05-27 | 2014-08-20 | 厦门建霖工业有限公司 | Conductive putty and application thereof |
| CN106318057A (en) * | 2016-08-23 | 2017-01-11 | 江苏华光新材料科技有限公司 | High-water-resistance fluorocarbon powder paint |
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2021
- 2021-09-22 CN CN202111108338.5A patent/CN113956703A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87101955A (en) * | 1986-03-14 | 1988-02-10 | R·J雷诺兹烟草公司 | The method of the carbonaceous fuel of preparation smoking product and the product of making thus |
| RU2219212C1 (en) * | 2002-09-19 | 2003-12-20 | Открытое акционерное общество "Белкард" | Composition material for tribotechnical coatings |
| CN1664038A (en) * | 2005-03-09 | 2005-09-07 | 哈尔滨工业大学 | Alloy putty |
| CN102086338A (en) * | 2010-12-22 | 2011-06-08 | 浙江工业大学 | Vinyl ester resin carbon series conductive paint with high corrosion resistance and heat resistance and preparation method thereof |
| CN103992679A (en) * | 2014-05-27 | 2014-08-20 | 厦门建霖工业有限公司 | Conductive putty and application thereof |
| CN106318057A (en) * | 2016-08-23 | 2017-01-11 | 江苏华光新材料科技有限公司 | High-water-resistance fluorocarbon powder paint |
| CN110172266A (en) * | 2019-05-22 | 2019-08-27 | 上海华染涂料科技有限公司 | A kind of good high-strength conductive poly-putty base of temperature tolerance and its preparation method and application |
| CN110655643A (en) * | 2019-11-06 | 2020-01-07 | 清远永昌涂料有限公司 | Preparation method of polyester resin for spraying putty, putty and preparation method thereof |
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| 王锦敏: "耐高温导电原子灰的研制及应用", 《现代涂料与涂装》 * |
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Application publication date: 20220121 |