CN111303817A - Flame-retardant waterborne polyurethane adhesive and preparation method thereof - Google Patents
Flame-retardant waterborne polyurethane adhesive and preparation method thereof Download PDFInfo
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- CN111303817A CN111303817A CN202010103324.3A CN202010103324A CN111303817A CN 111303817 A CN111303817 A CN 111303817A CN 202010103324 A CN202010103324 A CN 202010103324A CN 111303817 A CN111303817 A CN 111303817A
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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
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives 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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a flame-retardant waterborne polyurethane adhesive and a preparation method thereof, wherein the flame-retardant waterborne polyurethane adhesive consists of a main adhesive and a waterborne isocyanate curing agent, and the main adhesive and the waterborne isocyanate curing agent are matched according to the weight ratio of 100: 2-10; the main rubber comprises the following raw materials in parts by weight: 50-70 parts of aqueous polyurethane dispersoid, 30-50 parts of aqueous body flame-retardant acrylate, 0.1-0.5 part of aqueous thickener, 1-3 parts of fumed silica, 0.1-0.5 part of coupling agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of neutralizing agent and 0.1-0.5 part of defoaming agent. The adhesive disclosed by the invention is environment-friendly, non-toxic, low in VOC (volatile organic compounds), low in odor and excellent in bonding strength, and the flame retardant capability of the adhesive after film formation is remarkably improved, so that the adhesive can be widely applied to the fields of automobiles, high-speed rails, furniture, shoes making, textiles and the like.
Description
Technical Field
The invention relates to the field of waterborne polyurethane adhesives, in particular to a flame-retardant waterborne polyurethane adhesive and a preparation method thereof.
Background
At present, common adhesives in the fields of automobiles, high-speed rails, furniture, shoemaking, textiles and the like are classified into oil adhesives and water adhesives. The oily adhesive has large smell and is not environment-friendly, thereby not only affecting the health of workers, but also enabling the gluing part to continuously emit toxic and harmful substances to affect the body health of users. The aqueous adhesive is environment-friendly, non-toxic, low in VOC (volatile organic compounds) and low in odor, and can avoid the defects of an oily adhesive. However, the adhesives belong to high-molecular adhesives, and still have the characteristics of flammability or flammability after film formation, thereby bringing about fire hazard.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the flame-retardant waterborne polyurethane adhesive and the preparation method thereof, so that the flame-retardant waterborne polyurethane adhesive is environment-friendly, non-toxic, low in VOC (volatile organic compounds) and low in odor, has excellent bonding strength, remarkably improves the flame-retardant capability of the adhesive after film formation, and can be widely applied to the fields of automobiles, high-speed rails, furniture, shoe making, textile and the like.
The purpose of the invention is realized by the following technical scheme:
the flame-retardant waterborne polyurethane adhesive consists of a main adhesive and a waterborne isocyanate curing agent, wherein the main adhesive and the waterborne isocyanate curing agent are used in a matched manner according to the weight ratio of 100: 2-10;
the main rubber comprises the following raw materials in parts by weight:
a preparation method of a flame-retardant waterborne polyurethane adhesive comprises the following steps: according to the weight parts, 50-70 parts of aqueous polyurethane dispersoid, 30-50 parts of aqueous body flame-retardant acrylate, 1-3 parts of fumed silica, 0.1-0.5 part of coupling agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of neutralizing agent and 0.1-0.5 part of defoaming agent are mixed, stirred for 10-20 min at the rotating speed of 500-600 r/min, then 0.1-0.5 part of aqueous thickening agent is added, and then stirred for 30-60 min at the rotating speed of 700-800 r/min after the addition is finished until the viscosity reaches 3000-7000mPa.s, and the main adhesive is obtained after filtration; the main adhesive and the water-based isocyanate curing agent are used in a matching manner according to the weight ratio of 100: 2-10, so that the flame-retardant water-based polyurethane adhesive is obtained.
Preferably, the water-based bulk flame-retardant acrylate is the water-based bulk flame-retardant acrylate in Chinese patent CN102408853B (applicant: New Material alliance, Inc. of Beijing).
According to the technical scheme provided by the invention, the main adhesive is prepared from the aqueous polyurethane dispersion, the aqueous body flame-retardant acrylate, the aqueous thickening agent, the fumed silica, the coupling agent, the wetting agent, the neutralizing agent and the defoaming agent according to a specific proportion, and the characteristic of good compatibility of the aqueous polyurethane dispersion and the aqueous body flame-retardant acrylate is fully utilized, so that the VOC emission of the adhesive after film formation can be remarkably reduced, the smell of an adhesive film is reduced, the environmental quality of a production workshop is improved, the flame retardance of the adhesive after film formation can be improved by utilizing the flame-retardant characteristic of the body flame-retardant acrylate, the defect that the existing adhesive is flammable or inflammable after film formation is overcome, and the flame-retardant aqueous polyurethane adhesive can be widely applied to the fields of automobiles, high-speed railway, furniture, shoe making, textile and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The flame retardant waterborne polyurethane adhesive and the preparation method thereof provided by the present invention are described in detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The flame-retardant waterborne polyurethane adhesive consists of a main adhesive and a waterborne isocyanate curing agent, wherein the main adhesive and the waterborne isocyanate curing agent are used in a matched manner according to the weight ratio of 100: 2-10;
the main rubber comprises the following raw materials in parts by weight: 50-70 parts of aqueous polyurethane dispersoid, 30-50 parts of aqueous body flame-retardant acrylate, 0.1-0.5 part of aqueous thickener, 1-3 parts of fumed silica, 0.1-0.5 part of coupling agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of neutralizing agent and 0.1-0.5 part of defoaming agent.
Specifically, the flame retardant aqueous polyurethane adhesive may include the following embodiments:
(1) the aqueous polyurethane dispersion can adopt one or more of Bayer U53, Bayer U54, Bayer U56, Wanhua chemical 1633, Wanhua chemical 1665 and Wanhua chemical 1637 in the prior art.
(2) The water-based body flame-retardant acrylate can be water-based body flame-retardant acrylate in Chinese patent CN102408853B (applicant: Beijing GaoUnion New materials Co., Ltd.).
(3) The water-based thickener can adopt one or more of TEGO Visco Plus 3000, Acrysol RM2020 of Romen Haas, Acrysol RM8W of Romen Haas, Acrysol RM12W of Romen Haas, Acrysol RM5000 of Romen Haas, HEUR-A of Synfeic, HEUR-B of Synfeic, and Vesmody A801 of VawA chemical, which are won and created in the prior art.
(4) The coupling agent can adopt one or more of KH450, KH550, KH560, KH570 and KH602 in the prior art.
(5) The wetting agent can adopt one or more of TEGO WET KL245, BYK345, BYK346, BYK349 and BYK378 won in the prior art.
(6) The neutralizing agent can be one or more of AMP-95, N-methylethanolamine, dimethylethanolamine and diethanolamine in the prior art.
(7) The defoaming agent can adopt one or more of BASF Foamaster 8034, BYK018, BYK019, BYK093, Kalaien A200, AFCONA2590, SKC DF942 and DF677 in the prior art.
(8) The waterborne isocyanate curing agent can adopt one or more of Bayer Desmodur DN, Bayer Bayhydur3100, Tantanorian Aquolin268, Tantanorian Aquolin270 and Tantanorian Aquolin278 in the prior art.
Further, the preparation method of the flame-retardant aqueous polyurethane adhesive can comprise the following steps: according to the weight parts, 50-70 parts of aqueous polyurethane dispersoid, 30-50 parts of aqueous body flame-retardant acrylate, 1-3 parts of fumed silica, 0.1-0.5 part of coupling agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of neutralizing agent and 0.1-0.5 part of defoaming agent are mixed, stirred for 10-20 min at the rotating speed of 500-600 r/min, then 0.1-0.5 part of aqueous thickening agent is diluted by pure water and slowly dripped into the mixed solution, and then the mixed solution is continuously stirred for 30-60 min at the rotating speed of 700-800 r/min until the viscosity reaches 3000-7000mPa.s, and is filtered by a 200-mesh filter screen to obtain the main adhesive; the main adhesive and the water-based isocyanate curing agent are used in a matching manner according to the weight ratio of 100: 2-10, so that the flame-retardant water-based polyurethane adhesive is obtained.
When the flame-retardant waterborne polyurethane adhesive provided by the invention is used, the main adhesive and the waterborne isocyanate curing agent are mixed according to the weight ratio of 100: 2-10, and then are stirred at the rotating speed of 500-600 r/min for 5-10 min, so that the adhesive can be applied. After sizing, the finished parts are cured for 72 hours and then performance tests can be carried out. Through detection: the bonding strength of the flame-retardant waterborne polyurethane adhesive at normal temperature is 90-130N/5 cm, the tearing force is more than 50N/5cm after the wet-heat aging impact for 45 days, the phenomena of bulging, deformation, edge warping and the like do not exist, and the adhesive film has the flame-retardant characteristic of self-extinguishing after being away from fire.
Compared with the prior art, the flame-retardant waterborne polyurethane adhesive provided by the invention fully utilizes the characteristic that the waterborne polyurethane dispersoid and the waterborne bulk flame-retardant acrylate have good compatibility, and the waterborne bulk flame-retardant acrylate in Chinese patent CN102408853B is used, so that the flame-retardant capability of the waterborne polyurethane adhesive film is improved.
Compared with the traditional solvent-based adhesive, the flame-retardant waterborne polyurethane adhesive provided by the invention not only can obviously reduce VOC (volatile organic compounds) emission after the film formation of the adhesive, reduce the smell of an adhesive film and improve the environmental quality of a production workshop, but also can improve the flame retardance after the film formation of the adhesive, solves the defect that the existing adhesive is flammable or inflammable after the film formation, and can be widely applied to the fields of automobiles, high-speed rails, furniture, shoe making, textiles and the like.
In conclusion, the embodiment of the invention is environment-friendly, non-toxic, low in VOC (volatile organic compounds), low in odor and excellent in bonding strength, the flame retardant capability of the adhesive after film formation is remarkably improved, and the adhesive can be widely applied to the fields of automobiles, high-speed rails, furniture, shoe making, textiles and the like.
In order to more clearly show the technical scheme and the technical effects provided by the present invention, the following detailed description is provided for the flame retardant waterborne polyurethane adhesive and the preparation method thereof provided by the embodiment of the present invention with specific examples.
Example 1
A flame-retardant waterborne polyurethane adhesive is prepared by a method comprising the following steps (by weight portion): mixing 20 parts of Bayer U54, 45 parts of Bayer U56, 35 parts of waterborne body flame-retardant acrylate, 1 part of fumed silica, 0.2 part of coupling agent KH550, 0.15 part of winning TEGO WET KL245, 0.2 part of AMP-95 and 0.1 part of BASF Foamaster 8034, stirring at the rotating speed of 500-600 r/min for 10-20 min, diluting 0.15 part of winning TEGO Visco plus 3000 with 0.15 part of pure water, slowly dripping into the mixed solution, continuously stirring at the rotating speed of 700-800 r/min for 30-60 min after finishing the dripping, sampling to test the viscosity, stopping stirring when the viscosity is within the range of 3000-7000mPa.s, and filtering with a 200-mesh filter screen to obtain the main adhesive. The main adhesive and the Desmodur DN of the waterborne isocyanate curing agent Bayer are used in a matching way according to the weight ratio of 100:5, so that the flame-retardant waterborne polyurethane adhesive is obtained.
When the flame-retardant waterborne polyurethane adhesive is used, the main adhesive and the waterborne isocyanate curing agent Bayer Desmodur DN are mixed according to the weight ratio of 100:5, and then the mixture is stirred for 5-10 min at the rotating speed of 500-600 r/min, so that the adhesive can be applied. After sizing, the finished parts were cured for 72 hours before bond strength testing and flame resistance testing, the results of which are shown in table 1 below.
Example 2
A flame-retardant waterborne polyurethane adhesive is prepared by a method comprising the following steps (by weight portion): mixing 25 parts of Bayer U54, 45 parts of Bayer U56, 30 parts of water-based flame-retardant acrylate, 1.5 parts of fumed silica, 0.25 part of coupling agent KH560, 0.2 part of byK345, 0.15 part of N-methylethanolamine and 0.2 part of byK018, stirring at the rotating speed of 500-600 r/min for 10-20 min, diluting 0.2 part of Acrysol 2020 of Rohm Haas with 0.2 part of pure water, slowly dripping the diluted solution into the mixed solution, continuously stirring at the rotating speed of 700-800 r/min for 30-60 min after the addition is finished, sampling to test the viscosity, stopping stirring when the viscosity is within the range of 3000-7000mPa.s, and filtering with a 200-mesh filter screen to obtain the main adhesive. The main adhesive and the Desmodur DN of the waterborne isocyanate curing agent Bayer are used in a matching way according to the weight ratio of 100:3, so that the flame-retardant waterborne polyurethane adhesive is obtained.
When the flame-retardant waterborne polyurethane adhesive is used, the main adhesive and the waterborne isocyanate curing agent Bayer Desmodur DN are mixed according to the weight ratio of 100:3, and then the mixture is stirred for 5-10 min at the rotating speed of 500-600 r/min, so that the adhesive can be applied. After sizing, the finished parts were cured for 72 hours before bond strength testing and flame resistance testing, the results of which are shown in table 1 below.
Example 3
A flame-retardant waterborne polyurethane adhesive is prepared by a method comprising the following steps (by weight portion): mixing 20 parts of Wanhua chemical 1633, 45 parts of Wanhua chemical 1665, 35 parts of aqueous bulk flame-retardant acrylate, 2 parts of fumed silica, 0.3 part of coupling agent KH570, 0.2 part of BYK346, 0.3 part of dimethylethanolamine and 0.25 part of Kelaien A200, stirring at the rotating speed of 500-600 r/min for 10-20 min, diluting 0.15 part of Acrysoll 8W of Rohm by 0.15 part of pure water, slowly dripping into the mixed solution, continuously stirring at the rotating speed of 700-800 r/min for 30-60 min after finishing the dripping, sampling to test the viscosity, stopping stirring when the viscosity is within the range of 3000-7000mPa.s, and filtering by using a 200-mesh filter screen RM to obtain the main adhesive; the main adhesive and Bayhydur3100 of waterborne isocyanate curing agent Bayer are used in a weight ratio of 100:7, so that the flame-retardant waterborne polyurethane adhesive is obtained.
When the flame-retardant waterborne polyurethane adhesive is used, the main adhesive and waterborne isocyanate curing agent Bayer Bayhydur3100 are mixed according to the weight ratio of 100:7, and then stirred at the rotating speed of 500-600 r/min for 5-10 min, so that the adhesive can be applied. After sizing, the finished parts were cured for 72 hours before bond strength testing and flame resistance testing, the results of which are shown in table 1 below.
Example 4
A flame-retardant waterborne polyurethane adhesive is prepared by a method comprising the following steps (by weight portion): mixing 20 parts of Bayer U54, 20 parts of Bayer U56, 25 parts of WanhuA chemical 1665, 35 parts of water-based flame-retardant acrylate, 2.5 parts of fumed silicA, 0.35 part of coupling agent KH602, 0.25 part of Pic BYK349, 0.35 part of diethanolamine and 0.15 part of AFCONA2590, stirring at the rotating speed of 500-600 r/min for 10-20 min, diluting 0.15 part of HEUR-A of Hefei Andec with 0.15 part of pure water, slowly dropwise adding into the mixed solution, continuously stirring at the rotating speed of 700-800 r/min for 30-60 min after the addition is finished until the viscosity reaches 3000-7000mPa.s, stopping stirring, and filtering with A 200-mesh filter screen to obtain the main adhesive; the main adhesive and aqueous isocyanate curing agent Qutawarian Aquolin268 are used in a matching manner according to the weight ratio of 100:3, so that the flame-retardant aqueous polyurethane adhesive is obtained.
When the flame-retardant waterborne polyurethane adhesive is used, the main adhesive and waterborne isocyanate curing agent Tantawawa Aquolin268 are mixed according to the weight ratio of 100:3, and are stirred for 5-10 min at the rotating speed of 500-600 r/min, so that the adhesive can be applied. After sizing, the finished parts were cured for 72 hours before bond strength testing and flame resistance testing, the results of which are shown in table 1 below.
Comparative example
An aqueous polyurethane adhesive is prepared by the following steps (by weight portion): mixing 40 parts of Bayer U54, 60 parts of Bayer U56, 1 part of fumed silica, 0.2 part of coupling agent KH550, 0.15 part of BYK378, 0.2 part of AMP-95 and 0.1 part of mulberry well chemical SKC DF942, stirring at the rotating speed of 500-600 r/min for 10-20 min, diluting 0.15 part of Wanhua chemical Vesmody A801 with 0.15 part of pure water, slowly dropwise adding the mixture into the mixed solution, continuously stirring at the rotating speed of 700-800 r/min for 30-60 min after the addition is finished, sampling to test the viscosity, stopping stirring when the viscosity is within the range of 3000-7000mPa.s, and filtering with a 200-mesh filter screen to obtain the main rubber. The main glue and the Desmodur DN of the waterborne isocyanate curing agent Bayer are used in a matching way according to the weight ratio of 100:5, so as to obtain the waterborne polyurethane adhesive.
When the waterborne polyurethane adhesive is used, the main adhesive and the waterborne isocyanate curing agent Bayer DesmodurDN are mixed according to the weight ratio of 100:5, and then the mixture is stirred for 5-10 min at the rotating speed of 500-600 r/min, so that the adhesive can be applied. After sizing, the finished parts were cured for 72 hours before bond strength testing and flame resistance testing, the results of which are shown in table 1 below.
TABLE 1
As can be seen from table 1 above: the bonding strength of the flame-retardant waterborne polyurethane adhesive provided by the embodiments 1 to 4 of the invention at normal temperature is 93-118N/5 cm, the bonding strength is more than 70N/5cm after the hot and humid aging impact for 45 days, and the adhesive film has the flame-retardant characteristic of self-extinguishing after leaving fire.
In conclusion, the embodiment of the invention is environment-friendly, non-toxic, low in VOC (volatile organic compounds), low in odor and excellent in bonding strength, the flame retardant capability of the adhesive after film formation is remarkably improved, and the adhesive can be widely applied to the fields of automobiles, high-speed rails, furniture, shoe making, textiles and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The flame-retardant waterborne polyurethane adhesive is characterized by comprising a main adhesive and a waterborne isocyanate curing agent, wherein the main adhesive and the waterborne isocyanate curing agent are used in a matched manner according to the weight ratio of 100: 2-10;
the main rubber comprises the following raw materials in parts by weight:
2. the preparation method of the flame-retardant waterborne polyurethane adhesive is characterized by comprising the following steps:
according to the weight parts, 50-70 parts of aqueous polyurethane dispersoid, 30-50 parts of aqueous body flame-retardant acrylate, 1-3 parts of fumed silica, 0.1-0.5 part of coupling agent, 0.1-0.5 part of wetting agent, 0.1-0.5 part of neutralizing agent and 0.1-0.5 part of defoaming agent are mixed, stirred for 10-20 min at the rotating speed of 500-600 r/min, then 0.1-0.5 part of aqueous thickening agent is added, and then stirred for 30-60 min at the rotating speed of 700-800 r/min after the addition is finished until the viscosity reaches 3000-7000mPa.s, and the main adhesive is obtained after filtration;
the main adhesive and the water-based isocyanate curing agent are used in a matching manner according to the weight ratio of 100: 2-10, so that the flame-retardant water-based polyurethane adhesive is obtained.
3. The preparation method of the flame-retardant waterborne polyurethane adhesive according to claim 2, wherein the waterborne bulk flame-retardant acrylate is a waterborne bulk flame-retardant acrylate disclosed in Chinese patent CN 102408853B.
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| CN112980336A (en) * | 2021-02-25 | 2021-06-18 | 南通高盟新材料有限公司 | Nitrogen-phosphorus synergistic flame-retardant waterborne polyurethane adhesive and preparation method thereof |
| CN114456764A (en) * | 2022-03-07 | 2022-05-10 | 上海回天新材料有限公司 | Waterborne polyurethane adhesive for automotive interior and preparation method and application thereof |
| CN115044338A (en) * | 2022-07-22 | 2022-09-13 | 合肥科天水性科技有限责任公司 | Water-based formaldehyde-free adhesive for cigarette packaging and preparation method and application thereof |
| CN115895561A (en) * | 2022-12-02 | 2023-04-04 | 南通高盟新材料有限公司 | Water-based polyurethane adhesive with low viscosity and high thixotropic index and preparation method thereof |
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| CN115044338A (en) * | 2022-07-22 | 2022-09-13 | 合肥科天水性科技有限责任公司 | Water-based formaldehyde-free adhesive for cigarette packaging and preparation method and application thereof |
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