CN110835514A - Double-component flame-retardant polyurethane adhesive and preparation method thereof - Google Patents
Double-component flame-retardant polyurethane adhesive and preparation method thereof Download PDFInfo
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- CN110835514A CN110835514A CN201911099337.1A CN201911099337A CN110835514A CN 110835514 A CN110835514 A CN 110835514A CN 201911099337 A CN201911099337 A CN 201911099337A CN 110835514 A CN110835514 A CN 110835514A
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- 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
- C08G18/36—Hydroxylated esters of higher fatty acids
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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
- 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
- C08G18/54—Polycondensates of aldehydes
- C08G18/542—Polycondensates of aldehydes with phenols
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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
- 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
- C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/08—Means for preventing radiation, e.g. with metal foil
Abstract
The invention discloses a preparation method of a double-component flame-retardant polyurethane adhesive, which comprises two steps of preparation of a poly-phenolic resin and preparation of a component A and a component B of the polyurethane adhesive. The preparation method of the two-component flame-retardant polyurethane adhesive adopts phenol and formaldehyde in a certain molar ratio to react to prepare the phenolic resin, the dense benzene ring in the phenolic resin enables the phenolic resin to have good flame-retardant performance and to be used as a reactant polyol of polyurethane, and meanwhile, hydroxymethyl of the phenolic resin can react with isocyanate under the action of a catalyst, and the obtained polyurethane adhesive does not contain inorganic or organic flame retardant and has the flame-retardant performance and the bonding performance of the two-component polyurethane adhesive. The invention also discloses a double-component flame-retardant polyurethane adhesive and a pipeline heat-insulating material.
Description
Technical Field
The invention relates to the technical field of polyurethane adhesive production, in particular to a double-component flame-retardant polyurethane adhesive and a preparation method thereof.
Background
The aluminum foil composite glass fiber cloth is mainly used for outer protective layers of pipeline heat-insulating materials and building materials such as rock wool and glass fiber reinforced plastic wool, and has the effects of flame retardance, heat insulation, corrosion resistance and the like. The aluminum foil composite glass fiber cloth comprises an aluminum foil and glass fiber cloth, and the aluminum foil and the glass fiber cloth are thermally compounded through a flame-retardant adhesive by adopting a thermal compounding machine. Polyurethane glue is a commonly used adhesive, but has poor flame retardancy.
Flame retardant polyurethane adhesives known in the prior art, such as CN106244080A, CN108084940A and CN107513317A, all add flame retardants, such as nitrogen phosphorus flame retardants and bromine flame retardants, to the components of the polyurethane. The compatibility of inorganic flame retardant and polyurethane is poor, organic flame retardant is divided into halogen flame retardant, phosphorus flame retardant, nitrogen-phosphorus flame retardant and nitrogen flame retardant, the halogen flame retardant is favored by people due to high cost performance, but toxic HCl, HCN and CO gases are easily released during combustion, and dioxin substances with carcinogenic effect on human bodies are possibly generated.
Disclosure of Invention
One of the purposes of the invention is to overcome the defects in the prior art and provide a two-component flame-retardant polyurethane adhesive, which adopts the components of phenolic resin modified polyurethane adhesive to endow the polyurethane adhesive with flame retardant property.
In order to achieve the technical effects, the technical scheme of the invention is as follows: a double-component polyurethane adhesive is characterized by comprising a component A and a component B; the main components of the component A are polyalcohol, thermosetting phenolic resin and polyurethane catalyst, and the component B is isocyanate.
The preferable technical scheme is that the component A comprises 50-80 parts of polyol, 20-50 parts of thermosetting phenolic resin and 0.1-3 parts of polyurethane catalyst in parts by weight, and the mass ratio of the component A to the component B is (4-6) to 1; the viscosity of the thermosetting phenolic resin with the water content of less than 1% at 25 ℃ is 500-2000 mPa & s.
The polyurethane catalyst is preferably one or a combination of two or more selected from an organotin catalyst, an organobismuth catalyst and a tertiary ammonium catalyst.
The preferable technical scheme is that the component A also comprises a coupling agent, and the amount of the coupling agent in the component A is 0-5 parts by weight.
The preferable technical scheme is that the component A also comprises a diluent, and the dosage of the diluent in the component A is 3-15 parts by weight.
The preferable technical scheme is that the polyalcohol is vegetable oil polyalcohol, and the viscosity of the vegetable oil polyalcohol at 25 ℃ is 2000-4500 mPa.
The invention also aims to provide a preparation method of the double-component polyurethane adhesive, which is characterized by comprising the following steps:
s1: heating phenol, formaldehyde and an alkaline catalyst to react under an alkaline condition, adjusting the pH value to 6-7, and dehydrating to obtain phenolic resin;
s2: preparing a component A and a component B of a polyurethane adhesive, wherein the component A contains polyol, phenolic resin obtained from S1 and a polyurethane catalyst, and the component B is isocyanate; the viscosity of the thermosetting phenolic resin with the water content of less than 1% at 25 ℃ is 500-2000 mPa & s.
The preferable technical scheme is that the molar ratio of phenol to formaldehyde in S1 is 1: (1.2-2.5), wherein the heating reaction temperature is 80-90 ℃.
The preferable technical scheme is that the alkaline catalyst is an organic amine catalyst, and the mass of the alkaline catalyst is 1-3% of that of phenol.
The invention also aims to provide a pipeline heat-insulating material which is characterized by comprising an aluminum foil layer and a glass fiber cloth layer which are laminated, wherein the aluminum foil layer and the glass fiber cloth layer are connected by the double-component flame-retardant polyurethane adhesive in an adhesive manner.
The invention has the advantages and beneficial effects that:
the preparation method of the two-component flame-retardant polyurethane adhesive adopts phenol and formaldehyde in a certain molar ratio to react to prepare phenolic resin, dense benzene rings in the phenolic resin enable the phenolic resin to have good flame retardant performance and be used as reactant polyol of polyurethane, and hydroxymethyl of the phenolic resin can react with isocyanate under the action of a catalyst, so that the obtained polyurethane adhesive does not contain inorganic or organic flame retardant and has the flame retardant performance and the aluminum foil glass fiber bonding performance of the two-component polyurethane adhesive.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Preparation of phenolic resin by reaction of phenol and formaldehyde
Phenol and formaldehyde react under alkaline heating conditions as follows: firstly, carrying out addition reaction on formaldehyde and phenol to generate hydroxymethyl phenol, and secondly, carrying out polycondensation on the hydroxymethyl phenol to generate thermosetting phenolic resin. The thermosetting phenolic resin contains hydroxymethyl active groups which can be further reacted. After the reaction of phenol with formaldehyde is completed, the viscosity of the phenolic resin obtained by removing the catalyst, impurities and water is related to the molecular weight, and the viscosity of the phenolic resin depends on the molar ratio of the reactants, the pH value of the reaction system, the reaction temperature and the reaction time.
Preferably, the molar ratio of phenol to formaldehyde in S1 is 1: (1.2-2.5), the phenolic resin polymer obtained by the reaction is in a spatial network structure with high benzene ring consistency, so that the phenolic resin polymer has strong flame retardant property.
The basic catalyst for phenol and formaldehyde under basic conditions includes but is not limited to organic bases such as sodium hydroxide, ammonia water, potassium hydroxide and amines, the preferred organic bases are amines, the amine catalyst is weak in alkalinity, the reaction is easy to control, and the solid content of the obtained phenolic resin is high. Further, the basic catalyst is one or a combination of more than two of triethylamine, dimethylethanolamine, triethylene diamine, cyclohexylamine and triethanolamine.
Polyurethane catalyst
The polyurethane catalyst functions to catalyze the reaction of the polyol with the isocyanate. The selection range of the polyurethane catalyst includes amine catalyst and organic metal catalyst.
Commonly used amine catalysts include aliphatic amine catalysts such as N, N-dimethylcyclohexylamine, bis (2-dimethylaminoethyl) ether, N' -tetramethylalkylenediamine, triethylamine, N-dimethylbenzylamine; the alicyclic amine catalyst comprises solid amine, N-ethyl morpholine, N-methyl morpholine and N, N' -diethyl piperazine; alcohol compound catalyst such as triethanolamine and DMEA; the aromatic amine is pyridine, N, N' -dimethylpyridine. The organometallic catalysts usually used include carboxylates, metal alkyls, etc., and the metal elements contained therein are mainly tin, potassium, lead, mercury, zinc, etc., and the organotin compounds are most commonly used.
Furthermore, the catalyst is organic tin, organic bismuth-based catalyst or tertiary ammonium-based catalyst, preferably one or two of dibutyltin dilaurate catalyst or triethylamine. The hydroxymethyl in the phenolic resin reacts with isocyanate under the action of the catalyst, the phenolic resin is introduced into a polyurethane system, so that the two-component polyurethane has good flame retardant property besides the original adhesive property, and the component A and the component B in the obtained two-component polyurethane are uniformly mixed and reacted, so that the two-component polyurethane is convenient to coat or glue and has strong adhesive capacity to metal and inorganic materials.
Coupling agent
The coupling agent is used for improving the compatibility of the phenolic resin and the polyalcohol, and the preferred coupling agent is a silane coupling agent, and the types of the silane coupling agent are preferably KH550 and KH 560.
Diluent
The diluent is used for diluting a mixed system of the phenolic resin and the polyhydric alcohol, so that the component A and the component B are more easily mixed uniformly, and the polyurethane colloid after the mixing reaction is in a fluid state with certain viscosity, thereby being convenient for the operations of coating or impregnating glass fiber cloth and the like. The preferable diluent is one or the combination of more than two of ethyl acetate, dimethyl formamide and dimethyl carbonate.
Polyhydric alcohols
The preferred polyol is a vegetable oil polyol having a viscosity of 2000 to 4500mPa · s at 25 ℃. The reason is that vegetable oil polyols have good chemical and physical properties, especially outstanding thermal stability and hydrolysis resistance.
The weight ratio of the component A to the component B
The weight ratio of the component A to the component B partially determines the molecular weight of the produced polyurethane adhesive, if the component A is excessive, the reaction is incomplete, the adhesive effect of the adhesive is influenced, otherwise, the reaction is too fast, and the viscosity of the A, B component mixture is changed too fast, so that the production and the application are not facilitated. The mass ratio of A to component B is preferably (4-6): 1.
Example 1
Example 1 a method for preparing a two-component polyurethane adhesive includes two steps:
s1: preparing phenolic resin, namely adding 100 parts by weight of phenol, 138 parts by weight of liquid formaldehyde and 2 parts by weight of dimethylethanolamine (the content of formaldehyde in the liquid formaldehyde is 37%, the molar ratio of the phenol to the formaldehyde is 1:1.6, and the mass of the dimethylethanolamine is 2% of the phenol) into a reaction kettle in sequence, slowly raising the temperature to 85 ℃, preserving the temperature for 120min, cooling the reaction liquid, adding acid to adjust the pH value to be 7 +/-0.1, and dehydrating until the water content of the resin is less than 1%, wherein the viscosity of the obtained phenolic resin is 1500 mPas.
S2: the preparation of the component A comprises the following components in parts by weight: 75 parts of vegetable oil polyol (FH-2310, Zhang Jia gang flying science and technology Limited) (the viscosity of the vegetable oil polyol at 25 ℃ is 3000mPa & s); 25 parts of phenolic resin; 0.5 part of dibutyltin dilaurate serving as a polyurethane catalyst; 1 part of KH550 silane coupling agent; 10 parts of dimethylformamide, and uniformly stirring to obtain the component A.
The using process of the polyurethane is as follows: the component A comprises the following components in percentage by mass: the component B is uniformly mixed according to the proportion of 5:1 and is used for compounding the aluminum foil and the glass fiber cloth.
Example 2
Example 2 is based on example 1 with the difference that:
s2: the component A comprises the following components in parts by weight: 65 parts of vegetable oil polyol; example 1 phenolic resin 35 parts; the rest components are the same as the components in the embodiment 1, and the component A is obtained after even stirring.
Example 3
Example 3 a method of preparing a two-component polyurethane adhesive includes two steps:
s1: the preparation of the phenolic resin comprises the steps of sequentially adding 100 parts by weight of phenol, 155 parts by weight of liquid formaldehyde and 2 parts by weight of dimethylethanolamine (the content of formaldehyde in the liquid formaldehyde is 37%, the molar ratio of the phenol to the formaldehyde is 1:1.8, and the mass of the dimethylethanolamine is 2% of that of the phenol) into a reaction kettle, slowly raising the temperature to 83 ℃, keeping the temperature for 150min, cooling the reaction liquid, adding acid to adjust the pH value to be 7 +/-0.1, and dehydrating until the water content of the resin is less than 1%, wherein the viscosity of the obtained phenolic resin is 2000 mPas.
S2: the preparation of the component A comprises the following components in parts by weight: 70 parts of vegetable oil polyol (the viscosity of the vegetable oil polyol at 25 ℃ is 4000mPa & s); 30 parts of phenolic resin; 0.5 part of dibutyltin dilaurate serving as a polyurethane catalyst; 1 part of KH550 silane coupling agent; 10 parts of dimethylformamide, and uniformly stirring to obtain the component A.
The using process of the polyurethane adhesive comprises the following steps: the component A comprises the following components in percentage by mass: the component B is uniformly mixed according to the proportion of 5.5:1 and is used for compounding the aluminum foil and the glass fiber cloth.
Example 4
Example 4 is based on example 1 with the difference that:
s2: the preparation of the component A comprises the following components in parts by weight: 80 parts of vegetable oil polyol; example 1 phenolic resin 20 parts; 1 part of dibutyltin dilaurate serving as a polyurethane catalyst; 1 part of KH550 silane coupling agent; 10 parts of dimethylformamide, and uniformly stirring to obtain the component A.
Example 5
Example 5 is based on example 2 with the difference that dimethylethanolamine is replaced by equimolar sodium hydroxide in the preparation of the phenolic resin.
Example 6 is based on example 2 with the difference that the vegetable oil polyol is replaced by a polyether polyol (4110, herbori, ka chemical co., ltd., Shandong).
Comparative example
Comparative example 1 is based on example 1 except that the a component does not contain a phenolic resin and only contains the vegetable oil polyol, the urethane catalyst dibutyltin dilaurate, and the silane coupling agent in the same weight parts as in example 1.
The performance test of the aluminum foil composite glass fiber cloth obtained in the examples and the comparative examples comprises the following steps:
1. and (3) flame retardant detection: the measurement was carried out using the UL94 standard for combustion rating.
2. And (3) detecting the bonding strength: the evaluation was carried out with FZ/T60011-2016 as a reference.
3. High-temperature aging test: cutting the finished product sample into 100 mm-300 mm specification, and placing
And keeping the mixture in a forced air drying oven at the temperature of 180 ℃ for 48 hours, taking out the mixture, and observing whether the appearance has the defects of losing adhesion, delamination and the like.
The results of the performance tests obtained in the examples and comparative examples are shown in the following table:
| flame retardant properties | Evaluation of adhesive Properties | High temperature aging evaluation | |
| Example 1 | V2 | Not peel off at all | Not peel off at all |
| Example 2 | V1 | Not peel off at all | Partial peeling |
| Example 3 | V1 | Not peel off at all | Not peel off at all |
| Example 4 | V2 | Not peel off at all | Not peel off at all |
| Example 5 | V1 | Partial peeling | Partial peeling |
| Example 6 | V1 | Not peel off at all | Partial peeling |
| Comparative example 1 | HB | Not peel off at all | Not peel off at all |
As can be seen from the above table, the flame retardant performance of examples 1-6 is better than that of comparative example 1 when the phenolic resin is introduced into the polyurethane adhesive, and the increased content of the phenolic resin in the defined range of the thermosetting phenolic resin content helps to improve the flame retardant performance of the polyurethane adhesive. In addition, inorganic hydroxide is preferably used as an alkali agent in the phenolic resin polycondensation reaction, which contributes to improving the adhesive property of the polyurethane adhesive, and the raw material vegetable oil polyol which is preferably used in the polyurethane condensation reaction contributes to improving the thermal stability and the water resistance of the polyurethane adhesive product.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A double-component polyurethane adhesive is characterized by comprising a component A and a component B; the main components of the component A are polyalcohol, thermosetting phenolic resin and polyurethane catalyst, and the component B is isocyanate.
2. The two-component polyurethane adhesive according to claim 1, wherein the component A comprises 50-80 parts by weight of polyol, 20-50 parts by weight of thermosetting phenolic resin and 0.1-3 parts by weight of polyurethane catalyst, and the mass ratio of the component A to the component B is (4-6): 1; the viscosity of the thermosetting phenolic resin with the water content of less than 1% at 25 ℃ is 500-2000 mPa & s.
3. The two-component polyurethane adhesive of claim 1, wherein the polyurethane catalyst is one or a combination of two or more selected from the group consisting of an organotin catalyst, an organobismuth catalyst, and a tertiary ammonium catalyst.
4. The two-component polyurethane adhesive of claim 2, wherein the component A further comprises a coupling agent, and the amount of the coupling agent in the component A is 0-5 parts by weight.
5. The two-component polyurethane adhesive of claim 2, wherein the component A further comprises a diluent, and the diluent is used in an amount of 3 to 15 parts by weight.
6. The two-component polyurethane adhesive of claim 1, wherein the polyol is a vegetable oil polyol having a viscosity of 2000 to 4500 mPa-s at 25 ℃.
7. The preparation method of the two-component polyurethane adhesive is characterized by comprising the following steps:
s1: heating phenol, formaldehyde and an alkaline catalyst to react under an alkaline condition, adjusting the pH value to 6-7, and dehydrating to obtain phenolic resin;
s2: preparing a component A and a component B of a polyurethane adhesive, wherein the component A contains polyol, phenolic resin obtained from S1 and a polyurethane catalyst, and the component B is isocyanate; the viscosity of the thermosetting phenolic resin with the water content of less than 1% at 25 ℃ is 500-2000 mPa & s.
8. The method of claim 7, wherein the molar ratio of phenol to formaldehyde in S1 is 1: (1.2-2.5), wherein the heating reaction temperature is 80-90 ℃.
9. The preparation method of the two-component polyurethane adhesive according to claim 7, wherein the basic catalyst is an organic amine catalyst, and the mass of the basic catalyst is 1-3% of that of phenol.
10. A pipeline thermal insulation material, which is characterized by comprising an aluminum foil layer and a glass fiber cloth layer which are laminated, wherein the aluminum foil layer and the glass fiber cloth layer are bonded and connected through the double-component flame-retardant polyurethane adhesive in any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114437618A (en) * | 2022-03-08 | 2022-05-06 | 黄文兴 | Waterborne polyurethane adhesive and preparation method thereof |
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| CN104448189A (en) * | 2014-12-03 | 2015-03-25 | 山东海冠化工科技有限公司 | Phenol-formaldehyde-resin-modified rigid polyurethane foam and preparation method thereof |
| CN108329883A (en) * | 2018-01-17 | 2018-07-27 | 上海华峰新材料研发科技有限公司 | Solvent-free class polyurethane adhesive of quick-dry type and preparation method thereof |
| CN109679046A (en) * | 2018-12-29 | 2019-04-26 | 宁波高新区州致科技有限公司 | A kind of preparation method of semiconductor-sealing-purpose polyurethane modified phenol formaldehyde resin composition |
| CN110452656A (en) * | 2019-08-23 | 2019-11-15 | 垣曲县宏远特种防水材料有限公司 | A kind of phenol aldehyde modified base polyurethane prepolymer for use as-sodium metasilicate two-component consolidation grouting material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114437618A (en) * | 2022-03-08 | 2022-05-06 | 黄文兴 | Waterborne polyurethane adhesive and preparation method thereof |
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