CN111253891A - Flame-retardant coated EPS phenolic resin adhesive and preparation method thereof - Google Patents
Flame-retardant coated EPS phenolic resin adhesive and preparation method thereof Download PDFInfo
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- CN111253891A CN111253891A CN201911411245.2A CN201911411245A CN111253891A CN 111253891 A CN111253891 A CN 111253891A CN 201911411245 A CN201911411245 A CN 201911411245A CN 111253891 A CN111253891 A CN 111253891A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09J161/04, C09J161/18 and C09J161/20
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- 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
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
- C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
- C08G14/06—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
- C08G14/08—Ureas; Thioureas
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention relates to the technical field of materials, and discloses a flame-retardant EPS (expandable polystyrene) coated phenolic resin adhesive which comprises a phenolic resin adhesive, wherein the phenolic resin adhesive mainly comprises the following raw materials in parts by weight: 20-60 parts of phenol, 30-80 parts of formaldehyde, 1-15 parts of an alkaline catalyst, 1-15 parts of urea, 0.2-10 parts of a coupling agent, 0-30 parts of water, 1-20 parts of alcohols, 0.5-20 parts of acids and 0.5-20 parts of salts, wherein the alkaline catalyst can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like as raw materials, the alcohols can be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensates and the like, and the acids can be formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid and the like. This fire-retardant type cladding EPS phenolic resin gluing agent, cladding that can be even in the surface of polystyrene granule has good fire behaviour, can form stable honeycomb structure when preparing cladding type EPS heated board, and ablation resistance is superior.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a flame-retardant EPS (expandable polystyrene) coated phenolic resin adhesive and a preparation method thereof.
Background
EPS foam board, also known as polystyrene foam board, EPS board is by the expandable polystyrene bead containing volatile liquid foaming agent, heat the white object shaped in the mould after heating and prefoaming, it has structural characteristics of the fine obturator, etc., it has light, cheap, thermal conductivity low, hydroscopicity small, the electrical insulating property is good, sound insulation, resist shock, dampproof, shaping advantage such as being simple technological process, etc., therefore is used as the heat insulation, sound insulation, antidetonation material of heat preservation such as the building, vessel, car, train, refrigeration, freezing extensively. However, the traditional EPS insulation board has poor flame retardant effect and is easy to burn, and a large amount of toxic dense smoke and gas can be released during burning, once a high-rise building catches fire, the fire is difficult to extinguish, trapped people are difficult to evacuate, the number of people who die due to the fact that excessive dense smoke and toxic gas are sucked in the fire scene accounts for 80-84% of the number of people who die from the fire, especially, the EPS insulation board starts to melt, deform and drip at 80 ℃, and great potential safety hazards are brought to the building.
An improved grade-A fireproof honeycomb isolation EPS heat insulation board is a novel heat insulation material which is improved on the basis of a traditional molded polystyrene foam board, so that the grade-A flame retardant effect is achieved. The novel heat-insulating material not only has the advantages of small heat conductivity coefficient, good heat-insulating effect, light weight and the like of the traditional EPS foam board, but also overcomes the defects of poor flame-retardant effect of the traditional EPS foam board, and simultaneously solves the problems of heavy quality and high price of similar flame-retardant effect materials in the market, so that the novel heat-insulating material is an ideal heat-insulating material and has wide market demands.
The improved A-level fireproof honeycomb type EPS insulation board is characterized in that a layer of mixed slurry which takes phenolic resin adhesive as a main body and takes light calcium, pigment and the like as fillers is uniformly coated on the surface of half-foamed polystyrene particles, then the mixed slurry is continuously foamed and solidified in a special mould at a certain temperature, and after the mixed slurry is solidified for a certain time, the mixed slurry is cooled to normal temperature to obtain the novel A-level EPS insulation board which takes phenolic resin to form a honeycomb and full-foamed EPS particles arranged in the honeycomb and has a fireproof grade reaching A level; in order to prepare the insulation board, the phenolic resin adhesive is a key, common phenolic resin cannot achieve the synchronization of foaming and foaming time and curing time with the initiation and shaping time of polystyrene particles, and cannot achieve the requirement of uniformly coating the surface of the polystyrene particles, and any one of the requirements cannot be met, so that honeycomb cannot be formed, the flame-retardant effect is greatly reduced, even the flame-retardant capability is lost, and more seriously, the EPS insulation board which is possibly prepared is seriously deformed and scrapped. Therefore, a specific green phenolic resin adhesive specially used for preparing the A-grade fireproof honeycomb type EPS insulation board becomes the key point in the field.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the flame-retardant coating EPS phenolic resin adhesive and the preparation method thereof, the flame-retardant coating EPS phenolic resin adhesive has good spreading performance, can be uniformly coated on the surface of polystyrene particles, can be foamed, has moderate foaming speed and excellent flame-retardant performance, has the advantages of stable structure, ablation resistance and the like when a honeycomb is formed, and solves the problems that the conventional phenolic resin cannot achieve the synchronization of foaming and foaming time and curing time with the initiation and setting time of the polystyrene particles, cannot achieve the requirement of uniformly coating the surface of the polystyrene particles, and further has great reduction in flame-retardant effect or even loses flame-retardant capability.
(II) technical scheme
In order to realize the purposes of good spreading performance, uniform coating on the surface of polystyrene particles, foaming, moderate foaming speed, excellent flame retardant property, stable structure and ablation resistance when forming a honeycomb, the invention provides the following technical scheme: the flame-retardant EPS-coated phenolic resin adhesive comprises a phenolic resin adhesive, wherein the phenolic resin adhesive is prepared from the following raw materials in parts by weight: 20-60 parts of phenol, 30-80 parts of formaldehyde, 1-15 parts of alkaline catalyst, 1-15 parts of urea, 0.2-10 parts of coupling agent, 0-30 parts of water, 1-20 parts of alcohol, 0.5-20 parts of acid and 0.5-20 parts of salt.
Preferably, the basic catalyst raw material can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like.
Preferably, the alcohol may be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensate, or the like.
Preferably, the acid may be an organic acid or an inorganic acid such as formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid, or the like.
Preferably, the salt can be sodium chloride, sodium sulfate, sodium bisulfate, sodium sulfite, sodium bisulfite, sodium phosphate, sodium pyrophosphate, etc.
Preferably, the concentration of the formaldehyde solution is set at 50%.
A preparation method of a flame-retardant coated EPS phenolic resin adhesive comprises the following steps:
s1: adding phenol, formaldehyde, an alkaline catalyst, alcohols, water and the like into a reaction kettle in sequence according to the design amount, gradually heating to 50-90 ℃, and reacting for 2-8 hours at 50-90 ℃;
s2: adding urea and salts with the designed amount into a reaction kettle, and adding acid to adjust the pH value after the urea is completely dissolved so as to ensure that the pH value is 6.5-8.5;
s3: dehydrating the raw material in the step S2 under the condition of negative pressure, cooling and stopping dehydration after the raw material is dehydrated to certain viscosity;
s4: adding a certain amount of alcohols, coupling agents and the like into the raw materials in the step S3, and taking out of the kettle after uniformly stirring.
(III) advantageous effects
Compared with the prior art, the invention provides the flame-retardant coated EPS phenolic resin adhesive and the preparation method thereof, and the flame-retardant coated EPS phenolic resin adhesive has the following beneficial effects:
the flame-retardant coated EPS phenolic resin adhesive and the preparation method thereof have the advantages that the raw materials are easy to obtain, the price is low, and the preparation efficiency is high under the condition of ensuring the product quality under the condition of a well-designed preparation process. The prepared phenolic resin adhesive has good affinity with polystyrene particles, good miscibility with other auxiliary materials and uniform coating on the surfaces of the particles; the foaming performance is good, the matching performance of the curing time and the initiation time and the shaping time of the styrene particles is good, the prepared EPS insulation board has a perfect honeycomb structure and excellent flame retardant performance, and completely reaches the fire-proof A-level standard; and the bonding strength is high; the free aldehyde in the phenolic resin is less than 0.5 percent, thereby meeting the requirement of environmental protection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The first embodiment is as follows:
the flame-retardant EPS-coated phenolic resin adhesive comprises a phenolic resin adhesive, wherein the phenolic resin adhesive is prepared from the following raw materials in parts by weight: 20 parts of phenol, 30 parts of formaldehyde, 10 parts of an alkaline catalyst, 15 parts of urea, 3 parts of a coupling agent, 17 parts of water, 15 parts of alcohols, 4 parts of acids and 5 parts of salts.
The basic catalyst raw material can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like.
The alcohol can be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensate, etc.
The acid can be organic acid or inorganic acid such as formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid, etc.
The salt can be sodium chloride, sodium sulfate, sodium bisulfate, sodium sulfite, sodium bisulfite, sodium phosphate, sodium pyrophosphate, etc.
The concentration of the formaldehyde solution was set at 50%.
A preparation method of a flame-retardant coated EPS phenolic resin adhesive comprises the following steps:
s1: adding phenol, formaldehyde, an alkaline catalyst, alcohols, water and the like into a reaction kettle in sequence according to the design amount, gradually heating to 60 ℃, and reacting for 6 hours at 60 ℃;
s2: adding urea and salts with the designed amount into a reaction kettle, and adding acid to adjust the pH value to 7 after the urea is completely dissolved;
s3: dehydrating the raw material in the step S2 under the condition of negative pressure, cooling and stopping dehydration after the raw material is dehydrated to certain viscosity;
s4: adding a certain amount of alcohols, coupling agents and the like into the raw materials in the step S3, and taking out of the kettle after uniformly stirring.
Example two:
the flame-retardant EPS-coated phenolic resin adhesive comprises a phenolic resin adhesive, wherein the phenolic resin adhesive is prepared from the following raw materials in parts by weight: 60 parts of phenol, 80 parts of formaldehyde, 15 parts of an alkaline catalyst, 8 parts of urea, 6 parts of a coupling agent, 15 parts of water, 18 parts of alcohols, 10 parts of acids and 17 parts of salts.
The basic catalyst raw material can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like.
The alcohol can be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensate, etc.
The acid can be organic acid or inorganic acid such as formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid, etc.
The salt can be sodium chloride, sodium sulfate, sodium bisulfate, sodium sulfite, sodium bisulfite, sodium phosphate, sodium pyrophosphate, etc.
The concentration of the formaldehyde solution was set at 50%.
A preparation method of a flame-retardant coated EPS phenolic resin adhesive comprises the following steps:
s1: adding phenol, formaldehyde, an alkaline catalyst, alcohols, water and the like into a reaction kettle in sequence according to the design amount, gradually heating to 78 ℃, and reacting for 7 hours at 78 ℃;
s2: adding urea and salts with the designed amount into a reaction kettle, and adding acid to adjust the pH value after the urea is completely dissolved so as to enable the pH value to be 7.5;
s3: dehydrating the raw material in the step S2 under the condition of negative pressure, cooling and stopping dehydration after the raw material is dehydrated to certain viscosity;
s4: adding a certain amount of alcohols, coupling agents and the like into the raw materials in the step S3, and taking out of the kettle after uniformly stirring.
Example three:
the flame-retardant EPS-coated phenolic resin adhesive comprises a phenolic resin adhesive, wherein the phenolic resin adhesive is prepared from the following raw materials in parts by weight: 45 parts of phenol, 55 parts of formaldehyde, 7 parts of an alkaline catalyst, 7 parts of urea, 4 parts of a coupling agent, 18 parts of water, 2 parts of alcohols, 15 parts of acids and 15 parts of salts.
The basic catalyst raw material can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like.
The alcohol can be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensate, etc.
The acid can be organic acid or inorganic acid such as formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid, etc.
The salt can be sodium chloride, sodium sulfate, sodium bisulfate, sodium sulfite, sodium bisulfite, sodium phosphate, sodium pyrophosphate, etc.
The concentration of the formaldehyde solution was set at 50%.
A preparation method of a flame-retardant coated EPS phenolic resin adhesive comprises the following steps:
s1: adding phenol, formaldehyde, a basic catalyst, alcohols, water and the like into a reaction kettle in sequence according to the design amount, gradually heating to 55 ℃, and reacting for 5 hours at 55 ℃;
s2: adding urea and salts with the designed amount into a reaction kettle, and adding acid to adjust the pH value after the urea is completely dissolved so as to enable the pH value to be 6.5;
s3: dehydrating the raw material in the step S2 under the condition of negative pressure, cooling and stopping dehydration after the raw material is dehydrated to certain viscosity;
s4: adding a certain amount of alcohols, coupling agents and the like into the raw materials in the step S3, uniformly stirring, and taking out of the kettle
In conclusion, the flame-retardant coated EPS phenolic resin adhesive and the preparation method thereof have the advantages that the raw materials are easy to obtain, the price is low, and the preparation efficiency is high under the condition of ensuring the product quality under the condition of a well-designed preparation process. The prepared phenolic resin adhesive has good affinity with polystyrene particles, good miscibility with other auxiliary materials and uniform coating on the surfaces of the particles; the foaming performance is good, the matching performance of the curing time and the initiation time and the shaping time of the styrene particles is good, the prepared EPS insulation board has a perfect honeycomb structure and excellent flame retardant performance, and completely reaches the fire-proof A-level standard; and the bonding strength is high; the free aldehyde in the phenolic resin is less than 0.5 percent, thereby meeting the requirement of environmental protection.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The flame-retardant coating EPS phenolic resin adhesive is characterized by comprising the following components in parts by weight: the phenolic resin adhesive comprises the following raw materials in parts by weight: 20-60 parts of phenol, 30-80 parts of formaldehyde, 1-15 parts of alkaline catalyst, 1-15 parts of urea, 0.2-10 parts of coupling agent, 0-30 parts of water, 1-20 parts of alcohol, 0.5-20 parts of acid and 0.5-20 parts of salt.
2. The flame-retardant coated EPS phenolic resin adhesive according to claim 1, wherein: the basic catalyst raw material can be sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, zinc oxide, organic amine and the like.
3. The flame-retardant coated EPS phenolic resin adhesive according to claim 1, wherein: the alcohol can be methanol, ethanol, isopropanol, ethylene glycol, glycerol, polyethylene glycol, propylene oxide condensate, etc.
4. The flame-retardant coated EPS phenolic resin adhesive according to claim 1, wherein: the acid can be organic acid or inorganic acid such as formic acid, acetic acid, p-toluenesulfonic acid, phenolsulfonic acid, sulfurous acid, sulfuric acid, hydrochloric acid and the like.
5. The flame-retardant coated EPS phenolic resin adhesive according to claim 1, wherein: the salt can be sodium chloride, sodium sulfate, sodium bisulfate, sodium sulfite, sodium bisulfite, sodium phosphate, sodium pyrophosphate, etc.
6. The flame-retardant coated EPS phenolic resin adhesive according to claim 1, wherein: the concentration of the formaldehyde solution is set to be 35-54%.
7. A preparation method of a flame-retardant coating EPS phenolic resin adhesive is characterized by comprising the following steps: the method comprises the following steps:
s1: adding phenol, formaldehyde, an alkaline catalyst, alcohols, water and the like into a reaction kettle in sequence according to the design amount, gradually heating to 50-90 ℃, and reacting for 2-8 hours at 50-90 ℃;
s2: adding urea and salts with the designed amount into a reaction kettle, and adding acid to adjust the pH value after the urea is completely dissolved so as to ensure that the pH value is 6.5-8.5;
s3: dehydrating the raw material in the step S2 under the condition of negative pressure, cooling and stopping dehydration after the raw material is dehydrated to certain viscosity;
s4: adding a certain amount of alcohols, coupling agents and the like into the raw materials in the step S3, and taking out of the kettle after uniformly stirring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911411245.2A CN111253891A (en) | 2019-12-31 | 2019-12-31 | Flame-retardant coated EPS phenolic resin adhesive and preparation method thereof |
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| CN201911411245.2A CN111253891A (en) | 2019-12-31 | 2019-12-31 | Flame-retardant coated EPS phenolic resin adhesive and preparation method thereof |
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Application publication date: 20200609 |