CN111334111A - Expansion type fireproof and explosion-proof coating and preparation method thereof - Google Patents

Expansion type fireproof and explosion-proof coating and preparation method thereof Download PDF

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Publication number
CN111334111A
CN111334111A CN202010201261.5A CN202010201261A CN111334111A CN 111334111 A CN111334111 A CN 111334111A CN 202010201261 A CN202010201261 A CN 202010201261A CN 111334111 A CN111334111 A CN 111334111A
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component
coating
stirring
polyetheramine
preparation
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CN111334111B (en
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李吉月
张宗民
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Shandong Fina Technology Development Co ltd
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Shandong Fina Technology Development Co ltd
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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
    • C09D5/185—Intumescent paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3225—Polyamines
    • C08G18/3237—Polyamines aromatic
    • C08G18/324—Polyamines aromatic containing only one aromatic ring
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    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
    • C08G18/3863—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur containing groups having sulfur atoms between two carbon atoms, the sulfur atoms being directly linked to carbon atoms or other sulfur atoms
    • C08G18/3865—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur containing groups having sulfur atoms between two carbon atoms, the sulfur atoms being directly linked to carbon atoms or other sulfur atoms containing groups having one sulfur atom between two carbon atoms
    • C08G18/3868—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur containing groups having sulfur atoms between two carbon atoms, the sulfur atoms being directly linked to carbon atoms or other sulfur atoms containing groups having one sulfur atom between two carbon atoms the sulfur atom belonging to a sulfide group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4825—Polyethers containing two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/50—Polyethers having heteroatoms other than oxygen
    • C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
    • C08G18/5024—Polyethers having heteroatoms other than oxygen having nitrogen containing primary and/or secondary amino groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/08—Polyurethanes from polyethers
    • 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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Abstract

The invention belongs to the technical field of fireproof coatings, and particularly discloses an intumescent fireproof and explosion-proof coating and a preparation method thereof, wherein the coating comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight: 40-60% of isocyanate, 30-55% of polypropylene glycol, 1-3% of rheological additive and 1-7% of flame retardant; the component B comprises the following raw materials in percentage by weight: 10-35% of curing agent, 3-10% of chain extender, 45-90% of polyetheramine, 1-6% of defoaming agent and 1-5% of viscosity reducer. The coating made of the coating has high extension, high tearing and flame retardant performance on the premise that the strength of the coating is not reduced, and the flame retardant is decomposed by heating in the continuous combustion process to form a foam material.

Description

Expansion type fireproof and explosion-proof coating and preparation method thereof
Technical Field
The invention relates to the technical field of fireproof coatings, in particular to an expansion type fireproof and explosion-proof coating and a preparation method thereof.
Background
In petrochemical industry, refining and chemical production enterprises, buildings such as machine cabinet rooms, control rooms, monitoring rooms and the like in the area adjacent to a production device face the damage of explosion hidden danger (60-150 kpa of anti-explosion impact load), in order to avoid the damage of explosion to the buildings and prevent the injury of personnel, safety assessment needs to be carried out on the buildings, then the frames of the buildings are strengthened, and anti-explosion coatings are sprayed on the wall surfaces of the buildings, so that the aims of preventing the damage of the explosion hidden danger and protecting the safety of the personnel are fulfilled. In the prior art, the fireproof and explosion-proof coating taking polyurea as a main component has excellent tear resistance and impact resistance; however, polyurea has the problem of insufficient temperature resistance, so that the fireproof and explosion-proof coating made of the polyurea cannot resist the high-temperature environment of continuous combustion, and cannot effectively protect bearing parts such as concrete, steel and the like in a factory building for a long time.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an intumescent fire-proof and explosion-proof coating and a preparation method thereof, which are used for solving the problems of insufficient high-temperature resistance and flame retardance of the fire-proof and explosion-proof coating in the prior art.
In order to achieve the above objects and other related objects, a first aspect of the present invention provides an intumescent fire and explosion protection coating, which comprises a component a and a component B, wherein the component a comprises the following raw materials by weight: 40-60% of isocyanate, 30-55% of polypropylene glycol, 1-3% of rheological additive and 1-7% of flame retardant; the component B comprises the following raw materials in percentage by weight: 10-35% of curing agent, 3-10% of chain extender, 45-90% of polyetheramine, 1-6% of defoaming agent and 1-5% of viscosity reducer.
Further, when in use, the component A and the component B are uniformly mixed according to the proportion of 1:1 and then are sprayed to prepare a coating.
Optionally, the polyetheramine is selected from at least one of polyetheramine D2000 and polyetheramine T5000; preferably, the polyetheramine comprises polyetheramine D2000 and polyetheramine T5000, and the component B comprises polyetheramine D200040-70% and polyetheramine T50005-20% in percentage by weight.
Optionally, the isocyanate is diphenylmethane diisocyanate selected from at least one of MDI-50 and MDI-100.
Optionally, the polypropylene glycol is selected from at least one of PPG200, PPG600, PPG1000, PPG2000, PPG 4000.
Optionally, the flame retardant is ammonium polyphosphate, and the ammonium polyphosphate is selected from at least one of APP I and APP II. Ammonium polyphosphate is decomposed under heating to generate polyphosphoric acid, the polyphosphoric acid reacts with polyether amine to generate polyphosphoester, then partial lipid compounds are decomposed to form carbide, and carbonaceous foam is formed in the decomposition process to cover the substrate, so that the aim of isolating flame is fulfilled. Wherein APP I initiates decomposition reaction at 150 ℃; APP II initiates decomposition reaction at 250 ℃. And calculating and checking the specific addition proportion according to the design.
Optionally, the curing agent is selected from at least one of diethyltoluenediamine, dimethylthiotoluenediamine.
Optionally, the chain extender is at least one of 4,4 '-bis (sec-butylamino) -diphenylmethane, 4' -methylene-bis (3-chloro-2, 6-diethylaniline).
Optionally, the viscosity reducer is selected from at least one of a high molecular polymer and a polyurethane compound.
The second aspect of the invention provides a preparation method of the intumescent fire-proof and explosion-proof coating, which comprises the following steps:
(1) the preparation method of the component A comprises the following steps: adding polypropylene glycol into a nitrogen-protected reaction kettle according to the raw material ratio, stirring under a vacuum condition, heating for dehydration, then removing vacuum, cooling to below 60 ℃, adding isocyanate, heating and stirring for reaction, after the reaction is completed, cooling to below 60 ℃, adding a rheological additive, stirring uniformly, adding ammonium polyphosphate, stirring uniformly, and discharging to obtain a component A;
(2) the preparation method of the component B comprises the following steps: adding the polyether amine, the curing agent and the chain extender into a reaction kettle according to the raw material ratio, charging nitrogen for protection, uniformly stirring, controlling the temperature in the kettle to be less than 40 ℃, reducing the stirring speed to 150-.
Optionally, in the step (1), the vacuum degree is controlled to be-0.095 MPa to-0.06 MPa.
Alternatively, in the step (1), the temperature of stirring, heating and dehydrating the polypropylene glycol in the reaction kettle is controlled to be 90-110 ℃.
Optionally, in the step (1), isocyanate is added into the reaction kettle, stirred uniformly, and heated to 70-90 ℃ for reaction for 1-3 hours.
As mentioned above, the intumescent fire-proof and explosion-proof coating and the preparation method thereof have the following beneficial effects:
the invention provides a fire-proof and explosion-proof formula for adding an intumescent flame retardant into a coating, and the coating prepared from the coating can have high extension, high tearing and flame retardant properties on the premise of ensuring that the strength of the coating is not reduced; in the continuous combustion process, the flame retardant in the components is heated and decomposed to form a foam material, and the foam material has low thermal conductivity and can effectively isolate the base material, so that the damage to buildings or bearing steel caused by continuous high-temperature combustion and explosion impact is avoided.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1
The formula of the intumescent fire-proof and explosion-proof coating of the embodiment is as follows:
the component A comprises:
raw materials and model In percentage by weight Manufacturer of the product
Diphenylmethane diisocyanate MDI-50 40 Wanhua cigarette holder
Polypropylene glycol PPG-1000 52 Dongda blue star
Modified polyurea rheological additive W3420 3 Shi shou material
Ammonium polyphosphate APP 428 5 Kelaien
And B component:
raw material In percentage by weight Manufacturer of the product
Curing agent E100 25 American jabao
Chain extender W6200 8 Wanhua cigarette holder
Polyetheramine D2000 48 Hensmei food
Polyether amine T5000 17 Hensmei food
Water-based antifoaming agent W107 1 Shi shou material
Viscosity reducer 9860 1 Shi shou material
The preparation method comprises the following steps:
1. the preparation method of the component A comprises the following steps: adding 40 parts of polypropylene glycol PPG-1000 into a reaction kettle with nitrogen protection, stirring at the vacuum degree of-0.095 MPa at the stirring speed of 600 rpm, and heating at 90 ℃ for dehydration; and then removing vacuum, filling nitrogen for protection, cooling to below 60 ℃, adding 40 parts of diphenylmethane diisocyanate MDI-50, uniformly stirring, heating to 90 ℃ for reaction for 1 hour, cooling to below 60 ℃ after complete reaction, adding 3 parts of rheological additive W3420, uniformly stirring, adding 5 parts of ammonium polyphosphate APP 428, uniformly stirring, and discharging to obtain the component A.
2. The preparation method of the component B comprises the following steps: sequentially adding 17 parts of polyetheramine T5000 and 48 parts of polyetheramine D2000 into a reaction kettle, uniformly stirring, adding 25 parts of curing agent E100 and 8 parts of chain extender W6200, introducing nitrogen for protection while stirring, and reducing the stirring speed to 300 revolutions per minute after the temperature in the kettle is controlled to be less than 40 ℃; and then uniformly mixing 1 part of the water-based defoaming agent W107 and 1 part of the viscosity reducer 9860, adding into the reaction kettle, continuously stirring for 30 minutes, and discharging to obtain the component B.
Spraying by using a Kyowa Pick brand JHPK-BPT1 spraying device according to the proportion of A to B to 1, and spraying to prepare a coating. Through detection, the tensile strength of the coating with the thickness of 2mm is 17 MPa; tear strength 96N/mm.
Example 2
The formula of the intumescent fire-proof and explosion-proof coating of the embodiment is as follows:
the component A comprises:
raw materials and model In percentage by weight Manufacturer of the product
Diphenylmethane diisocyanate MDI-50 50 Wanhua cigarette holder
Polypropylene glycol PPG-6000 40 Dongda blue star
Modified polyurea rheological additive W3420 3 Shi shou material
Ammonium polyphosphate APP 422 7 Kelaien
And B component:
raw material In percentage by weight Manufacturer of the product
Curing agent E100 25 American jabao
Chain extender W6200 8 Wanhua cigarette holder
Polyetheramine D2000 42 Hensmei food
Polyether amine T5000 20 Hensmei food
Aqueous defoamer W108 3 Shi shou material
Viscosity reducer 9870 2 Shi shou material
The preparation method comprises the following steps:
1. the preparation method of the component A comprises the following steps: adding 40 parts of polypropylene glycol PPG-1000 into a reaction kettle with nitrogen protection, stirring at the vacuum degree of-0.095 MPa at the stirring speed of 600 rpm, and heating at 90 ℃ for dehydration; and then removing vacuum, filling nitrogen for protection, cooling to below 60 ℃, adding 50 parts of diphenylmethane diisocyanate (MDI-50), uniformly stirring, heating to 90 ℃ for reaction for 1 hour, cooling to below 60 ℃ after complete reaction, adding 3 parts of rheological additive W3420, uniformly stirring, adding 7 parts of ammonium polyphosphate (APP) 422, uniformly stirring, and discharging to obtain the component A.
2. The preparation method of the component B comprises the following steps: sequentially adding 20 parts of polyetheramine T5000 and 42 parts of polyetheramine D2000 into a reaction kettle, uniformly stirring, adding 25 parts of curing agent E100 and 8 parts of chain extender W6200, introducing nitrogen for protection while stirring, and reducing the stirring speed to 300 revolutions per minute after the temperature in the kettle is controlled to be less than 40 ℃; and then uniformly mixing 3 parts of water-based defoaming agent W108 and 2 parts of viscosity reducer 9870, adding into the reaction kettle, continuously stirring for 30 minutes, and discharging to obtain the component B.
Spraying by using a Kyowa Pick brand JHPK-BPT1 spraying device according to the proportion of A to B to 1, and spraying to prepare a coating. Through detection, the tensile strength of the coating with the thickness of 2mm is 20 MPa; tear strength 101N/mm.
Example 3
The formula of the intumescent fire-proof and explosion-proof coating of the embodiment is as follows:
the component A comprises:
raw materials and model In percentage by weight Manufacturer of the product
Diphenylmethane diisocyanate MDI-50 60 Wanhua cigarette holder
Polypropylene glycol PPG-6000 30 Dongda blue star
Modified polyurea rheological additive W3420 3 Shi shou material
Ammonium polyphosphate APP 422 7 Kelaien
And B component:
raw material In percentage by weight Manufacturer of the product
Curing agent E100 10 American jabao
Chain extender MCDEA 3 Zhang hong Yarui chemical industry
Polyetheramine D2000 70 Hensmei food
Polyether amine T5000 7 Hensmei food
Aqueous defoamer W108 5 Shi shou material
Viscosity reducer 9870 5 Shi shou material
The preparation method comprises the following steps:
1. the preparation method of the component A comprises the following steps: adding 30 parts of polypropylene glycol PPG-1000 into a reaction kettle with nitrogen protection, stirring at the vacuum degree of-0.095 MPa at the stirring speed of 600 rpm, and heating at 100 ℃ for dehydration; and then removing vacuum, filling nitrogen for protection, cooling to below 60 ℃, adding 70 parts of diphenylmethane diisocyanate MDI-50, uniformly stirring, heating to 80 ℃ for reaction for 2 hours, cooling to below 60 ℃ after complete reaction, adding 3 parts of rheological additive W3420, uniformly stirring, adding 7 parts of ammonium polyphosphate APP 422, uniformly stirring, and discharging to obtain the component A.
2. The preparation method of the component B comprises the following steps: sequentially adding 7 parts of polyetheramine T5000 and 70 parts of polyetheramine D2000 into a reaction kettle, uniformly stirring, adding 10 parts of curing agent E100 and 3 parts of chain extender MCDEA, introducing nitrogen for protection while stirring, and reducing the stirring speed to 200 revolutions per minute after the temperature in the kettle is controlled to be less than 40 ℃; and then, uniformly mixing 5 parts of the aqueous defoaming agent W108 and 5 parts of the viscosity reducer 9870, adding into the reaction kettle, continuously stirring for 30 minutes, and discharging to obtain the component B.
Spraying by using a Kyowa Pick brand JHPK-BPT1 spraying device according to the proportion of A to B to 1, and spraying to prepare a coating. Through detection, the tensile strength of the coating with the thickness of 2mm is 18 MPa; tear strength 100N/mm.
Example 4
The formula of the intumescent fire-proof and explosion-proof coating of the embodiment is as follows:
the component A comprises:
raw materials and model In percentage by weight Manufacturer of the product
Diphenylmethane diisocyanate MDI-50 40 Wanhua cigarette holder
Polypropylene glycol PPG-6000 55 Dongda blue star
Modified polyurea rheological additive W3420 1 Shi shou material
Ammonium polyphosphate APP 428 4 Kelaien
And B component:
raw material In percentage by weight Manufacturer of the product
Curing agent E100 35 American jabao
Chain extender W6200 10 Wanhua cigarette holder
Polyetheramine D2000 40 Hensmei food
Polyether amine T5000 10 Hensmei food
Aqueous defoamer W108 2 Shi shou material
Viscosity reducer 9870 3 Shi shou material
The preparation method comprises the following steps:
1. the preparation method of the component A comprises the following steps: adding 55 parts of polypropylene glycol PPG-1000 into a reaction kettle with nitrogen protection, stirring at the vacuum degree of-0.095 MPa at the stirring speed of 600 rpm, and heating at 100 ℃ for dehydration; and then removing vacuum, filling nitrogen for protection, cooling to below 60 ℃, adding 40 parts of diphenylmethane diisocyanate MDI-50, uniformly stirring, heating to 70 ℃ for reaction for 3 hours, cooling to below 60 ℃ after complete reaction, adding 1 part of rheological additive W3420, uniformly stirring, adding 4 parts of ammonium polyphosphate APP 422, uniformly stirring, and discharging to obtain the component A.
2. The preparation method of the component B comprises the following steps: sequentially adding 10 parts of polyetheramine T5000 and 40 parts of polyetheramine D2000 into a reaction kettle, uniformly stirring, adding 35 parts of curing agent E100 and 10 parts of chain extender MCDEA, introducing nitrogen for protection while stirring, and reducing the stirring speed to 150 revolutions per minute after the temperature in the kettle is controlled to be less than 40 ℃; then 2 parts of water-based defoaming agent W108 and 3 parts of viscosity reducer 9870 are uniformly mixed and then added into the reaction kettle, and the mixture is continuously stirred for 40 minutes and then discharged, thus obtaining the component B.
Spraying by using a Kyowa Pick brand JHPK-BPT1 spraying device according to the proportion of A to B to 1, and spraying to prepare a coating. Through detection, the tensile strength of the coating with the thickness of 2mm is 20 MPa; tear strength 101N/mm.
Comparative example 1
Compared with the common organic ultrathin type expansion fireproof coating CN100432167C, the coating prepared in the embodiments 1 and 3 of the invention has the following performance comparison under the identical experimental conditions (refer to GB14907-2018 Steel structure fireproof coating):
Figure BDA0002419467650000061
comparative example 2
Compared with the inorganic intumescent fire-retardant coating CN107216693A, the coatings prepared in the examples 2 and 4 of the invention have the following performance comparisons under the same experimental conditions:
Figure BDA0002419467650000062
as can be seen from the above examples and comparative examples, the tensile strength, tear strength and fire resistance of the coating of the present invention are superior to those of the existing intumescent coatings.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The intumescent fire-proof and explosion-proof coating is characterized by comprising a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight: 40-60% of isocyanate, 30-55% of polypropylene glycol, 1-3% of rheological additive and 1-7% of flame retardant; the component B comprises the following raw materials in percentage by weight: 10-35% of curing agent, 3-10% of chain extender, 45-90% of polyetheramine, 1-6% of defoaming agent and 1-5% of viscosity reducer.
2. The coating of claim 1, wherein: when in use, the component A and the component B are uniformly mixed according to the proportion of 1:1 and then are sprayed to prepare the coating.
3. The coating of claim 1, wherein: the polyether amine is at least one selected from polyether amine D2000 and polyether amine T5000; preferably, the polyetheramine comprises polyetheramine D2000 and polyetheramine T5000, and the component B comprises polyetheramine D200040-70% and polyetheramine T50005-20% in percentage by weight.
4. The coating of claim 1, wherein: the isocyanate is diphenylmethane diisocyanate, and the diphenylmethane diisocyanate is at least one selected from MDI-50 and MDI-100.
5. The coating of claim 1, wherein: the polypropylene glycol is at least one selected from PPG200, PPG600, PPG1000, PPG2000 and PPG 4000.
6. The coating of claim 1, wherein: the flame retardant is ammonium polyphosphate, and the ammonium polyphosphate is selected from at least one of APP I and APP II.
7. The intumescent coating of claim 1, characterized in that: the curing agent is at least one of diethyl toluene diamine and dimethyl sulfur toluene diamine;
and/or the chain extender is at least one of 4,4 '-bis (sec-butylamino) -diphenylmethane and 4,4' -methylene-bis (3-chloro-2, 6-diethylaniline);
and/or the viscosity reducer is selected from at least one of high molecular polymer and polyurethane compound.
8. A process for the preparation of an intumescent fire and explosion protection coating as claimed in any of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) the preparation method for preparing the component A comprises the following steps: adding polypropylene glycol into a nitrogen-protected reaction kettle according to the raw material ratio, stirring under a vacuum condition, heating for dehydration, then removing vacuum, cooling to below 60 ℃, adding isocyanate, heating and stirring for reaction, after the reaction is completed, cooling to below 60 ℃, adding a rheological additive, stirring uniformly, adding ammonium polyphosphate, stirring uniformly, and discharging to obtain a component A;
(2) the preparation method for preparing the component B comprises the following steps: adding the polyether amine, the curing agent and the chain extender into a reaction kettle according to the raw material ratio, charging nitrogen for protection, uniformly stirring, controlling the temperature in the kettle to be less than 40 ℃, reducing the stirring speed to 150 plus materials for 300 r/min, then adding the defoaming agent and the viscosity reducer into the reaction kettle, continuously stirring for 30 min, uniformly discharging, and obtaining the component B.
9. The method of claim 8, wherein: in the step (1), the vacuum degree is controlled between-0.095 MPa and-0.06 MPa.
10. The method of claim 8, wherein: in the step (1), the temperature of stirring, heating and dehydrating the polypropylene glycol in a reaction kettle is controlled to be 90-100 ℃;
and/or in the step (1), adding isocyanate into the reaction kettle, uniformly stirring, and heating to 70-90 ℃ for reaction for 1-3 hours.
CN202010201261.5A 2020-03-20 2020-03-20 Expansion type fireproof and explosion-proof coating and preparation method thereof Expired - Fee Related CN111334111B (en)

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