CN112159611A - Water-based cable fireproof coating and preparation method thereof - Google Patents
Water-based cable fireproof coating and preparation method thereof Download PDFInfo
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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
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- Engineering & Computer Science (AREA)
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- Fireproofing Substances (AREA)
Abstract
The invention provides a water-based cable fireproof coating and a preparation method thereof. The water-based cable fireproof coating is a water-based environment-friendly coating and has no pollution to the environment. The cable belongs to inflammables, and the water-based cable fireproof coating disclosed by the invention belongs to a high-expansion fireproof coating, has an expansion multiple of 8-10 times, and can effectively block heat from being transferred to the interior of the cable. The coating can be naturally cured at normal temperature, and is convenient to construct. After curing, the adhesive force with the cable is strong, and the charring layer after firing can not fall off, can adhere to the cable epidermis tightly, has effectively prolonged the fire prevention time.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based cable fireproof coating and a preparation method thereof.
Background
Electrical fires are the first of all types of fires. The electric wires and cables are densely and widely distributed at each corner in life, from living places, working places, entertainment places and the like, particularly in middle-high-rise and high-rise closed buildings, the buildings are dense, once electric fire occurs, the fire rapidly spreads along the cables, the fire is easy to expand, and more casualties and economic losses are caused. If a fire occurs in a high-voltage station in a power plant, a local or large-area power failure can be caused to cause more disasters. Therefore, the surface of the cable needs to be fire-proof.
The application of the fireproof coating on the combustible is the best fireproof means at present, and when a fire occurs, the purposes of prolonging the flame-retardant time of the combustible and slowing down the spread of the fire can be achieved by applying the fireproof coating, so that enough time is provided for putting out a fire and the loss caused by the fire is reduced as much as possible. For the fire prevention of cable, not only lie in meeting the fire-retardant of fire initial stage, still need slow down thermal transmission, protect inside cable, still can keep the viscidity on coating and cable surface when meeting the fire carbomorphism, improve fire-retardant time.
The fire-retardant coating can be classified into a water-soluble type and a solvent type by classifying the used dispersion system; from the application range, the device can be divided into an outdoor type and an indoor type; the coating is classified into thick coating type, thin coating type and ultra-thin type according to thickness; the classification from fire-proof type can be divided into intumescent type and non-intumescent type. The existing products in the market at present are the fire retardant coating of indoor type building thin coating type, and to cable fire retardant coating product kind less, the better most solvent-based coating of cable adhesive force, the feature of environmental protection is poor, after long-time big fire burns, it is poor to insulate against heat, and inside cable substrate easily melts, and the carbonization layer can fracture, has the risk of drippage, probably causes the secondary of intensity of a fire to spread.
The existing cable fireproof coating still adopts a solvent type coating in order to improve the adhesive force with a base material, and achieves the aim of improving the flame retardance in a short time by greatly increasing the quantity of flame retardant powder and halogen substances. The treatment method has the advantages that on one hand, the charred layer formed by burning is hard and brittle, and on the other hand, the problem of environmental protection still exists.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems in the prior art. Therefore, the invention provides the water-based cable fireproof coating which has the characteristics of high expansion and high adhesive force, can be used for cable fire prevention, can enhance the heat insulation property by utilizing a carbonized layer with high expansion and high adhesive force formed by the coating, and solves the problems of the existing cable fireproof coating.
The invention also provides a preparation method of the water-based cable fireproof coating.
The invention provides a water-based cable fireproof coating in a first aspect, which is prepared from an emulsion, a flame-retardant system, a filler, an auxiliary agent and water, wherein the flame-retardant system is selected from at least three of pentaerythritol, melamine polyphosphate, ammonium polyphosphate and melamine.
The water-based cable fireproof coating disclosed by the invention at least has the following technical effects:
the water-based cable fireproof coating is a water-based environment-friendly coating and has no pollution to the environment.
The cable belongs to inflammables, and the water-based cable fireproof coating disclosed by the invention belongs to a high-expansion fireproof coating, has an expansion multiple of 8-10 times, and can effectively block heat from being transferred to the interior of the cable.
The water-based cable fireproof coating can be naturally cured at normal temperature, and is convenient to construct. After curing, the adhesive force with the cable is strong, and the charring layer after firing can not fall off, can adhere to the cable epidermis tightly, has effectively prolonged the fire prevention time.
The invention relates to a water-based cable fireproof coating, which comprises the following components in percentage by weight:
the emulsion is a film forming matter.
The flame-retardant system plays a role in synergistic flame retardance. Wherein:
pentaerythritol is a carbon forming agent, and the function is that under the action of sufficient heat, the carbon chain loses hydroxyl to form activated carbon, so that a heat insulation carbonization layer is formed, and heat transfer is prevented.
Melamine polyphosphate, ammonium polyphosphate and ammonium polyphosphate are used as a carbon forming catalyst, and have the functions of decomposing into acid under the action of high temperature, esterifying with a carbon forming agent, accelerating the carbon forming process, and simultaneously expanding when being heated to increase the system expansion.
The melamine is used as a foaming agent and is decomposed to generate non-combustible gas under the action of high temperature, and the generated combustible gas can improve the flame retardance of the system and foam the system to increase expansion.
The filler acts to adjust viscosity and density.
The auxiliary agent comprehensively improves the performance of the coating.
When meeting fire, the flame-retardant system has synergistic effect, and can form a high-expansion closed carbonization layer under the action of the auxiliary agent, so that the heat insulation property is enhanced. The coating coated on the surface of the outdoor cable has great requirements on oil resistance, salt water resistance, humidity resistance and freeze-thaw cycle resistance, and the water-based cable fireproof coating meets the performance requirements under the synergistic action of emulsion, a flame-retardant system, a filler and an auxiliary agent.
According to one embodiment of the invention, the composition is prepared from the following components in parts by weight:
emulsion: 45-60 parts of (A) a water-soluble polymer,
a flame-retardant system: 20 to 40 parts of (a) a water-soluble polymer,
filling: 10-20 parts of (A) a water-soluble polymer,
auxiliary agent: 1 to 5 parts by weight of a stabilizer,
water: 5-15 parts.
According to an embodiment of the present invention, the emulsion is at least one selected from the group consisting of a polyvinyl acetate emulsion, a styrene-acrylic emulsion, and a t-vinyl acetate emulsion having a solid content of 50 to 60%.
According to one embodiment of the invention, the filler is selected from at least two of titanium dioxide, heavy calcium carbonate, talc and silica fume.
According to one embodiment of the invention, the adjuvants include defoamers, film forming aids, adhesion promoting water repellents and reinforcing agents.
According to an embodiment of the present invention, the defoaming agent is selected from at least one of polyether-based defoaming agents, silicone-based defoaming agents, and vegetable mineral oil defoaming agents.
According to an embodiment of the present invention, the polyether defoamer is Rhodoline DF 4226.
According to one embodiment of the present invention, the silicone-based antifoaming agent is BYK-1615.
According to one embodiment of the invention, the vegetable mineral oil defoamer is an NXZ defoamer.
According to one embodiment of the invention, the coalescent is selected from at least one of ethylene glycol butyl ether, benzyl alcohol, and alcohol ester twelve. The film-forming assistant can reduce the film-forming temperature and can be quickly cured to form a film in winter.
According to one embodiment of the invention, the viscosifying waterproofing agent is polyvinyl alcohol.
According to one embodiment of the invention, the reinforcing agent is glass fibers. The glass fiber plays a role in reinforcing the coating and preventing the carbonization layer from cracking.
The second aspect of the invention provides a method for preparing the water-based cable fireproof coating, which comprises the following steps:
s1: pouring the emulsion, the auxiliary agent and water into a reaction kettle, heating, and stirring for the first time at a first stirring speed;
s2: adding the flame-retardant system and the filler into the reaction kettle, and stirring for the second time at a second stirring speed;
s3: and (5) grinding the product obtained in the step S2 to obtain the water-based cable fireproof coating.
According to an embodiment of the present invention, the temperature of the temperature rise is 60 to 80 ℃.
According to an embodiment of the present invention, the first stirring speed is 100 to 200 rpm.
According to an embodiment of the present invention, the time of the first stirring is 60 to 80 min.
According to an embodiment of the present invention, the second stirring speed is 400 to 500 rpm.
According to an embodiment of the invention, the time of the second stirring is 40-60 min.
According to one embodiment of the invention, the grinding process may be carried out by a three-roll mill.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention will be further described with reference to the examples, but the present invention is not limited to the examples.
Example 1
The present example provides a method of preparing an aqueous cable fire-retardant coating comprising the steps of:
s1: pouring the emulsion, the auxiliary agent and water into a reaction kettle, heating, and stirring for the first time at a first stirring speed;
s2: adding the flame-retardant system and the filler into the reaction kettle, and stirring for the second time at a second stirring speed;
s3: and (5) grinding the product obtained in the step S2 to obtain the water-based cable fireproof coating.
Wherein the temperature rise is 60-80 ℃. The first stirring speed is 100-200 rpm. The first stirring time is 60-80 min. The second stirring speed is 400 to 500 rpm. The time for the second stirring is 40-60 min. The grinding process may be carried out by a three-roll mill.
Example 2
In this example, an aqueous cable fire-retardant coating and a comparative coating were prepared according to the preparation method of example 1, and the formulations are shown in table 1.
TABLE 1
The test results for the first formulation of the waterborne cable fire-retardant coating and the comparative formulation of the coating are shown in Table 2.
TABLE 2
From Table 2, it can be seen that the emulsion has an influence on the continuity of the formed film, and when the content of the emulsion is lower than the compounding ratio defined in the present invention, the formed film is discontinuous and the bending resistance is poor.
Example 2
In this example, an aqueous cable fire-retardant coating and a comparative coating were prepared according to the preparation method of example 1, and the formulations are shown in Table 3.
TABLE 3
The test results of the aqueous cable fire retardant coating of formulation two and the coating of the comparative formulation are shown in table 4.
TABLE 4
As can be seen from table 4, melamine polyphosphate has a greater effect on the expansion factor of the coating than ammonium polyphosphate (n 50).
Example 3
In this example, an aqueous cable fire-retardant coating and a comparative coating were prepared according to the preparation method of example 1, and the formulations are shown in Table 5.
TABLE 5
The test results for the fire-retardant coating for aqueous cable of formulation three and the coating of the comparative formulation are shown in table 6.
TABLE 6
From Table 6, it can be seen that the effect of adjusting the proportions of the three components of the flame-retardant system on the char layer. The amount of ammonium polyphosphate (n >1000) and melamine affects the expansion factor and the char-forming agent pentaerythritol eventually forms a char layer. When the pentaerythritol content is too low, the ammonium polyphosphate and the melamine content are too high, the carbonization layer formed by the activated carbon is too low, the foaming expansion is serious, the carbonization layer is not continuous, and part of the carbonization layer is flocculent and falls off. In the flame-retardant system, the content of the char-forming catalyst is 38-42%, the content of the char-forming agent is 30-34%, and the content of the foaming agent is 24-32%, so that the best char-forming effect is achieved.
The above test is based on the following criteria:
GB 28374 Cable fire-retardant coating.
GB/T6753.1 determination of grinding fineness of paints, varnishes and printing inks.
GB/1723 paint viscometry.
GB/T1728 determination of drying time of putty film of paint film.
The performance index of the above test is shown in table 7.
TABLE 7
| Name of item | Performance index |
| State in the container | No caking, and uniform state after stirring |
| Fineness (um) | ≤90 |
| Viscosity (S) | ≥70 |
| Drying time (h) | Surface dryness/h is less than or equal to 5; the solid content/h is less than or equal to 24 |
| Oil resistance (d) | After being soaked for 7 days, the coating has no wrinkle and no peeling,No foaming. |
| Salt water resistance (d) | After the coating is soaked for 7 days, the coating has no wrinkling, no peeling and no foaming. |
| Moist heat resistance (d) | The coating had no wrinkling, no flaking, and no blistering for 7 days of the test. |
| Freeze-thaw durability cycle (second time) | After 15 cycles, the coating has no wrinkling, no peeling and no blistering. |
| Bending resistance | The coating has no peeling, falling and peeling. |
| Flame retardant rating (m) | The carbonization height is less than or equal to 2.5 |
| Expansion factor | Firing for 4min, with expansion multiple not less than 4 |
| Charred layer condition | The charring layer is loose and porous after burning, and the surface does not fall ash. |
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments described above, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The water-based cable fireproof coating is characterized by being prepared from emulsion, a flame-retardant system, a filler, an auxiliary agent and water, wherein the flame-retardant system is selected from at least three of pentaerythritol, melamine polyphosphate, ammonium polyphosphate and melamine.
2. The water-based cable fire retardant coating according to claim 1, which is prepared from the following components in parts by weight:
emulsion: 45-60 parts of (A) a water-soluble polymer,
a flame-retardant system: 20 to 40 parts of (a) a water-soluble polymer,
filling: 10-20 parts of (A) a water-soluble polymer,
auxiliary agent: 1 to 5 parts by weight of a stabilizer,
water: 5-15 parts.
3. The water-based cable fire-retardant coating as claimed in claim 1 or 2, wherein the emulsion is at least one selected from polyvinyl acetate emulsion, styrene-acrylic emulsion and tert-vinyl acetate emulsion with a solid content of 50-60%.
4. The water-based cable fire retardant coating according to claim 1 or 2, wherein the filler is at least two selected from titanium dioxide, heavy calcium carbonate, talcum powder and silica powder.
5. The water-based cable fire retardant coating according to claim 1 or 2, wherein the auxiliary agents comprise defoaming agents, film forming aids, tackifying and waterproofing agents and reinforcing agents.
6. The water-based cable fire retardant coating according to claim 5, wherein said defoamer is at least one selected from polyether defoamer, silicone defoamer and vegetable mineral oil defoamer.
7. The aqueous cable fire retardant coating according to claim 5, wherein said film forming aid is at least one selected from the group consisting of butyl cellosolve, benzyl alcohol, and dodecyl alcohol ester.
8. A process for preparing an aqueous cable fire retardant coating according to any one of claims 1 to 7, comprising the steps of:
s1: pouring the emulsion, the auxiliary agent and water into a reaction kettle, heating, and stirring for the first time at a first stirring speed;
s2: adding the flame-retardant system and the filler into the reaction kettle, and stirring for the second time at a second stirring speed;
s3: and (5) grinding the product obtained in the step S2 to obtain the water-based cable fireproof coating.
9. The method according to claim 8, wherein the temperature of the elevated temperature is 60 to 80 ℃.
10. The method according to claim 8, wherein the first stirring speed is 100 to 200 rpm.
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| CN202010966036.0A CN112159611A (en) | 2020-09-15 | 2020-09-15 | Water-based cable fireproof coating and preparation method thereof |
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| CN202010966036.0A CN112159611A (en) | 2020-09-15 | 2020-09-15 | Water-based cable fireproof coating and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150087674A (en) * | 2014-01-22 | 2015-07-30 | 신호테크 주식회사 | Environment Friendly and None Toxic Intumescent Fire-Retardant Paint |
| CN109321051A (en) * | 2018-10-11 | 2019-02-12 | 安徽四惠电缆有限公司 | A kind of fire retardant coating of aquosity cable and preparation method thereof |
| CN111363427A (en) * | 2018-12-26 | 2020-07-03 | 四川天府防火材料有限公司 | Environment-friendly halogen-free water-based cable fireproof coating and preparation method thereof |
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2020
- 2020-09-15 CN CN202010966036.0A patent/CN112159611A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150087674A (en) * | 2014-01-22 | 2015-07-30 | 신호테크 주식회사 | Environment Friendly and None Toxic Intumescent Fire-Retardant Paint |
| CN109321051A (en) * | 2018-10-11 | 2019-02-12 | 安徽四惠电缆有限公司 | A kind of fire retardant coating of aquosity cable and preparation method thereof |
| CN111363427A (en) * | 2018-12-26 | 2020-07-03 | 四川天府防火材料有限公司 | Environment-friendly halogen-free water-based cable fireproof coating and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 时虎等: "钢结构用膨胀型防火涂料组分的选择", 《上海涂料》 * |
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