CN113773783A - Water-based high-temperature-resistant polyurethane adhesive and preparation method thereof - Google Patents
Water-based high-temperature-resistant polyurethane adhesive and preparation method thereof Download PDFInfo
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- CN113773783A CN113773783A CN202111023949.XA CN202111023949A CN113773783A CN 113773783 A CN113773783 A CN 113773783A CN 202111023949 A CN202111023949 A CN 202111023949A CN 113773783 A CN113773783 A CN 113773783A
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- polyurethane adhesive
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- diisocyanate
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 68
- 239000004814 polyurethane Substances 0.000 title claims abstract description 68
- 239000000853 adhesive Substances 0.000 title claims abstract description 49
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 21
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920000728 polyester Polymers 0.000 claims abstract description 12
- 150000002009 diols Chemical class 0.000 claims abstract description 11
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 10
- 239000004970 Chain extender Substances 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 42
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 30
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 28
- 239000002904 solvent Substances 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 19
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 14
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 12
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical group OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 10
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 6
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 claims description 6
- ASUUYDBHVNPPRZ-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)octanoic acid Chemical compound CCCCCCC(CO)(CO)C(O)=O ASUUYDBHVNPPRZ-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 claims 2
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 4
- GGHDAUPFEBTORZ-UHFFFAOYSA-N propane-1,1-diamine Chemical compound CCC(N)N GGHDAUPFEBTORZ-UHFFFAOYSA-N 0.000 description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- JEUXZUSUYIHGNL-UHFFFAOYSA-N n,n-diethylethanamine;hydrate Chemical compound O.CCN(CC)CC JEUXZUSUYIHGNL-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- JVYDLYGCSIHCMR-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butanoic acid Chemical compound CCC(CO)(CO)C(O)=O JVYDLYGCSIHCMR-UHFFFAOYSA-N 0.000 description 1
- UHAMPPWFPNXLIU-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)pentanoic acid Chemical compound CCCC(CO)(CO)C(O)=O UHAMPPWFPNXLIU-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 150000003334 secondary amides Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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Classifications
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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
- C09J175/06—Polyurethanes from polyesters
-
- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/46—Polycondensates having carboxylic or carbonic ester groups in the main chain having heteroatoms other than oxygen
-
- 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
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- 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
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6648—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6651—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
-
- 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
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
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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)
- Polyurethanes Or Polyureas (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a waterborne high-temperature-resistant polyurethane adhesive and a preparation method thereof, wherein the components of the polyurethane adhesive and the molar weight ratio of the components are carborane polyester diol: diisocyanate: chain extender: a catalyst; the mole ratio of the hydrophilic monomers is n + 1: n: 0.1-0.9: 0.002 n-0.06 n: 0.9-0.1, wherein n is more than or equal to 3 and less than or equal to 10. The adhesive is an isocyanate-terminated urethane prepolymer generated by the reaction of carborane polyester diol, diisocyanate, a chain extender and the like, and then the urethane prepolymer is reacted with a hydrophilic monomer, neutralized, dispersed and emulsified to prepare the waterborne polyurethane adhesive. The adhesive has the characteristics of good bonding performance, easiness in coating, high temperature resistance and the like, and has potential application value in the field of aerospace.
Description
Technical Field
The invention relates to the field of high and low temperature resistant high polymer materials, in particular to a water-based high temperature resistant polyurethane adhesive and a preparation method thereof.
Technical Field
Polyurethane is a large class of high polymer materials containing carbamate groups (-NHCOO-) in molecular chain structures, wherein N-H and C ═ O are easy to form hydrogen bonds, the internal rotation motion of a molecular chain is limited by strong interaction force between polar groups, and the molecular chain is rigid and is a polyurethane hard segment; the polyether or polyester block molecular chain in the molecular chain takes a C-O single bond and a C-C single bond as main parts, and the molecular chain is easy to rotate, so that the polyurethane soft segment has good flexibility and is formed. Polyurethanes can be regarded as block copolymers consisting of alternating soft and hard segments. Inside the polyurethane body, since the two segments are thermodynamically incompatible, a microphase separation occurs, thereby forming a phase region or microphase region. Based on the structural characteristics of the polyurethane material, the polyurethane material has good mechanical property, low temperature resistance, flexing resistance, wear resistance and certain chemical resistance, and meanwhile, a polyurethane molecular chain contains a large number of strong polar groups such as carbamido and carbamate groups, so that intermolecular forces such as hydrogen bonds, van der Waals force and the like can be easily formed with various substrates, and a good bonding effect is obtained. The polyurethane material also has the tailorability of molecular structure which is not possessed by other high polymer materials, namely, the related performance of the material can be controlled by controlling the formula and adjusting the proportion of soft segments and hard segments according to the actual requirement. Therefore, the polyurethane is widely applied in the field of adhesives.
The traditional solvent type polyurethane adhesive is prepared by polymerizing toluene, acetone, xylene, butanone, ethyl acetate and the like serving as main solvents by a solution method. The solvents are flammable and explosive, have large odor and are volatile, can pollute the environment and have toxicity to human bodies. The waterborne polyurethane replaces an organic solvent with water, and has the characteristics of no toxicity and no harm. With the enhancement of environmental protection consciousness of people, researchers in various countries put great efforts on the development and research of waterborne polyurethane, and the development and application of the waterborne polyurethane adhesive are the future development trend of polyurethane adhesives. On the other hand, the polyurethane adhesive has poor heat resistance and low thermal decomposition temperature, so that the application range of the polyurethane adhesive is greatly limited. The temperature of the common polyurethane adhesive for long-term use is only 80 ℃, and the common polyurethane adhesive can be used only in a short time when the temperature of a system is higher than 120 ℃; it is required that polyurethane adhesives are modified to improve the heat resistance thereof so as to meet the demand of high-speed social development.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water-based high-temperature-resistant polyurethane adhesive to solve the problem that the existing polyurethane adhesive cannot meet the bonding requirements under environment protection and high temperature resistance.
In order to achieve the above object, the present invention provides the following technical solutions: the waterborne high-temperature-resistant polyurethane adhesive comprises the following components in molar weight ratio: carborane polyester diol, diisocyanate, a chain extender and a catalyst; the mol ratio of the hydrophilic monomer is n + 1: n: 0.1-0.9: 0.002-0.06 n: 0.9-0.1, wherein n is more than or equal to 3 and less than or equal to 10.
Further, the carborane polyester diol of the invention is preferably carborane polyester diol
Further, the diisocyanate of the present invention is preferably
Any one of them.
Further, the chain extender can be any one of ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol, diethylene glycol, neopentyl glycol, ethylenediamine, propylenediamine and 1, 4-butanediamine.
Further, the catalyst of the present invention may be any one of dibutyltin dilaurate and stannous octoate.
Furthermore, the hydrophilic monomer can be any one of 2, 2-dimethylolpropionic acid, 2-dimethylolbutyric acid, 2-dimethylolpentanoic acid and 2, 2-dimethyloloctanoic acid.
The invention also discloses a preparation method of the water-based high-temperature-resistant polyurethane adhesive, which comprises the following specific preparation steps:
heating carborane polyester diol to 100-120 ℃ in a nitrogen atmosphere, cooling to 20-30 ℃ after vacuum dehydration, adding diisocyanate and a solvent, heating to 56-70 ℃, reacting for 4-8 hours, adding a chain extender and a catalyst, continuing to react for 4-8 hours to obtain an isocyanate-terminated urethane prepolymer, adding a hydrophilic monomer, reacting for 4-8 hours, adding the solvent to reduce viscosity in the reaction process, cooling to room temperature, adding an alkaline aqueous solution to neutralize for more than 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling under reduced pressure at 40-60 ℃ to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Furthermore, the solvent can be any one of acetone, butanone and ethyl acetate; the alkaline aqueous solution can be any one of NaOH, KOH and triethylamine.
Furthermore, the solvent is 5-10 times of the total mass of the carborane polyester diol and the diisocyanate.
Further, the concentration of the alkaline aqueous solution is 20-80%.
Further, the number of moles of solute in the basic aqueous solution of the present invention is the same as that of the hydrophilic monomer.
Advantageous effects
According to the invention, a carborane structure and a hydrophilic group are introduced into a polyurethane molecular chain to prepare the water-based high-temperature-resistant polyurethane adhesive, and the adhesive has the characteristics of good bonding performance, easiness in coating, high temperature resistance and the like, and can be applied to the extreme fields of space environment, aerospace, weaponry and the like.
Description of the drawings:
FIG. 1 is an IR spectrum of the cured waterborne high temperature resistant polyurethane adhesive prepared in example 1 of the present invention, which is 3300cm-1(ii) peak of N-H stretching vibration of carbamate at 1710cm-1C ═ O stretching vibration peak of carbamate at position (C) ═ O1530 cm-1In-plane bending vibration peak of nearby secondary amide N-H, 1107cm-1The peak of the stretching vibration of carbamate C-O-C in the sample is proved, and the existence of carbamate structure in the sample is proved, and no characteristic peak 2273cm of-NCO appears in the spectrum-1The reaction is relatively complete.
FIG. 2 is a thermogravimetric diagram of the aqueous high temperature resistant polyurethane adhesive prepared in example 1 of the present invention after curing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below, and it should be apparent 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.
Example 1
In a nitrogen atmosphere, mixing
(1.470g, 3mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 20 deg.C, added
(0.696g, 4mmol) and acetone (10.83g), heating to 56 deg.C, reacting for 4h, adding ethylene glycol (0.0062g, 0.1mmol) and dibutyltin dilaurate (0.002g, 0.006mol), reacting for 4-8 h to obtain isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol), and reacting for 4hAdding a proper amount of solvent in the reaction process to reduce the viscosity, cooling to room temperature, adding NaOH aqueous solution (0.018g, 20%) to neutralize and react for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 40 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Selecting a stainless steel sheet as a material to be bonded, washing the surface by acetone and ethyl acetate, polishing by sand paper, coating adhesive on two surfaces after the post-treatment, fixing by a dovetail clamp, curing at room temperature for 7 days, measuring the shear strength according to GBT 7124-containing 2008, wherein the bonding strength at room temperature is 8.2MPa, and treating at 600 ℃ in an air atmosphere for 1 hour and then 3.8 MPa.
Example 2
In a nitrogen atmosphere, mixing
(6.300g, 10mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
(1.914g, 11mmol) and butanone (82.14g), heating to 70 ℃, reacting for 8 hours, adding 1, 4-butanediol (0.0558g, 0.9mmol) and stannous octoate (0.024g, 0.06mmol), continuing to react for 8 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolbutyric acid (0.0148g, 0.1mmol), reacting for 8 hours, adding a proper amount of solvent during the reaction process to reduce the viscosity, cooling to room temperature, adding KOH aqueous solution (0.028g, 20%) to neutralize for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Selecting a stainless steel sheet as a material to be bonded, washing the surface by acetone and ethyl acetate, polishing by sand paper, coating adhesive on two surfaces after the post-treatment, fixing by a dovetail clamp, curing at room temperature for 7 days, measuring the shear strength according to GBT 7124-sand-type 2008, wherein the bonding strength at room temperature is 6.8MPa, and treating at 600 ℃ in an air atmosphere for 1 hour and then at 3.2 MPa.
Example 3
In a nitrogen atmosphere, mixing
(1.470g, 3mmol) was heated to 120 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
(0.888g and 4mmol) and butanone (11.79g), heating to 56 ℃, reacting for 4 hours, adding 1, 6-hexanediol (0.0118 g and 0.1mmol) and dibutyltin dilaurate (0.007g and 0.018mmol), continuing to react for 4-8 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpentanoic acid (0.1458g and 0.9mmol), reacting for 4 hours, adding a proper amount of solvent during the reaction process to reduce the viscosity, cooling to room temperature, adding triethylamine aqueous solution (0.114g and 80%) to neutralize for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Selecting a stainless steel sheet as a material to be bonded, washing the surface by acetone and ethyl acetate, polishing by sand paper, coating adhesive on two surfaces after the post-treatment, fixing by a dovetail clamp, curing at room temperature for 7 days, measuring the shear strength according to GBT 7124-containing 2008, wherein the bonding strength at room temperature is 7.5MPa, and the bonding strength at room temperature is 2.8 MPa after the treatment at 600 ℃ in an air atmosphere for 1 hour.
Example 4
In a nitrogen atmosphere, mixing
(6.300g, 10mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
Heating (2.750g, 11mmol) and butanone to 56 ℃, reacting for 4 hours, adding diethylene glycol (0.0106g, 0.1mmol) and stannous octoate (0.0243g, 0.06mmol) to continue reacting for 8 hours to obtain isocyanate-terminated urethane prepolymer, adding 2, 2-dimethyloloctanoic acid (0.1836g, 0.9mmol) to react for 4-8 hours, adding a proper amount of solvent to reduce viscosity during the reaction process, adding triethylamine aqueous solution (0.114g, 80%) to neutralize and react for 2 hours after cooling to room temperature,dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 5
In a nitrogen atmosphere, mixing
(1.470g, 3mmol) is heated to 100-120 ℃, vacuum dehydrated and cooled to 30 ℃, added
Heating (1.000g, 4mmol) and butanone (12.35g), reacting for 4 hours at 56 ℃, adding diethylene glycol (0.0106g, 0.1mmol) and dibutyltin dilaurate (0.011 g, 0.018mmol) to continue reacting for 8 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethyloloctanoic acid (0.1836g, 0.9mmol) to react for 8 hours, adding a proper amount of solvent during the reaction process to reduce the viscosity, adding triethylamine aqueous solution (0.4545g, 20%) to neutralize for 2 hours after the reaction is cooled to room temperature, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 6
In a nitrogen atmosphere, mixing
(1.470g, 3mmol) was heated to 120 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
Heating (1.048g, 4mmol) and butanone (12.59g), reacting for 4 hours at 70 ℃, adding neopentyl glycol (0.054g, 0.9mmol) and stannous octoate (0.002g, 0.006mmol) to continue reacting for 8 hours to obtain isocyanate-terminated carbamate prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.1mmol) to react for 8 hours, adding a proper amount of solvent to reduce viscosity during the reaction process, cooling to room temperature, adding triethylamine aqueous solution (0.0505g, 20%) to neutralize for 2 hours, and rapidly stirring the prepared polyurethane prepolymerDispersing the urethane solution into deionized water, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 7
In a nitrogen atmosphere, mixing
Example 8
In a nitrogen atmosphere, mixing
(7.42g, 10mmol) was heated to 120 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
(2.486g, 11mmol) and butanone (49.53g), heating to 70 ℃, reacting for 4 hours, adding propanediamine (0.006g, 0.1mmol) and dibutyltin dilaurate (0.013g, 0.02mmol), continuing to react for 4 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol), reacting for 8 hours, adding a proper amount of solvent during the reaction to reduce the viscosity, cooling to room temperature, adding triethylamine aqueous solution (0.4545g, 20%) for neutralization to react for 2 hours, and rapidly stirring the prepared polyurethaneDispersing the solution into deionized water, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 9
In a nitrogen atmosphere, mixing
(2.226g, 3mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
Heating (0.672g, 4mmol) and butanone (14.49g), reacting for 4-8 hours at 56 ℃, adding propane diamine (0.0074g, 0.1mmol) and stannous octoate (0.002g, 0.006mmol) to continue reacting for 4 hours to obtain isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol) to react for 4 hours, adding a proper amount of solvent to reduce viscosity during the reaction process, cooling to room temperature, adding triethylamine water solution (0.4545g, 20%) to neutralize for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 10
In a nitrogen atmosphere, mixing
(7.42g, 10mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
(0.672g, 11mmol) and butanone (40.26g), heating to 56 ℃, reacting for 8 hours, adding propane diamine (0.0074g, 0.1mmol) and stannous octoate (0.008g, 0.02mmol), continuing to react for 4 hours to obtain isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol), reacting for 4 hours, adding a proper amount of solvent during the reaction to reduce the viscosity, cooling to room temperature, adding triethylamine aqueous solution (0.4545g, 20 percent) for neutralization, reacting for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, distilling at 60 ℃ under reduced pressure to remove propaneAnd (5) carrying out ketone reaction to obtain the aqueous polyurethane adhesive emulsion.
Example 11
In a nitrogen atmosphere, mixing
(2.226g, 3mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
(0.672g, 4mmol) and butanone (14.49g), heating to 70 ℃, reacting for 4-8 hours, adding 1, 4-butanediamine (0.0088, 0.1mmol) and stannous octoate (0.002g, 0.006mmol), continuing to react for 8 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol), reacting for 8 hours, adding a proper amount of solvent during the reaction process to reduce the viscosity, cooling to room temperature, adding triethylamine water solution (0.4545g, 20%) to neutralize for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling under reduced pressure at 60 ℃ to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Example 12
In a nitrogen atmosphere, mixing
(7.42g, 10mmol) was heated to 100 deg.C, vacuum dehydrated and cooled to 30 deg.C, added
Heating (1.848g, 11mmol) and butanone (46.34g), reacting for 8 hours at 56 ℃, adding propane diamine (0.0074g, 0.1mmol) and stannous octoate (0.0243g, 0.06mmol) to continue reacting for 4 hours to obtain an isocyanate-terminated urethane prepolymer, adding 2, 2-dimethylolpropionic acid (0.1206g, 0.9mmol) to react for 8 hours, adding a proper amount of solvent during the reaction process to reduce the viscosity, cooling to room temperature, adding triethylamine aqueous solution (0.4545g, 20%) to neutralize for 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling at 60 ℃ under reduced pressure to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
Claims (11)
1. The waterborne high-temperature-resistant polyurethane adhesive comprises the following components in molar weight ratio:
carborane polyester diol, diisocyanate, a chain extender and a catalyst; the mol ratio of the hydrophilic monomer is n + 1: n: 0.1-0.9: 0.002-0.06 n: 0.9-0.1, wherein n is more than or equal to 3 and less than or equal to 10.
2. The polyurethane adhesive of claim 1, wherein: the carborane polyester diol is
Wherein m is more than or equal to 2 and less than 12.
3. The polyurethane adhesive of claim 1, wherein: the diisocyanate is
4. The polyurethane adhesive of claim 1, wherein: the chain extender is ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol, diethylene glycol, neopentyl glycol, ethylenediamine, propylenediamine or 1, 4-butanediamine.
5. The polyurethane adhesive of claim 1, wherein: the catalyst is dibutyltin dilaurate or stannous octoate.
6. The polyurethane adhesive of claim 1, wherein: the hydrophilic monomer is 2, 2-dimethylolpropionic acid, 2-dimethylolbutyric acid, 2-dimethylolpentanoic acid or 2, 2-dimethyloloctanoic acid.
7. The process for producing a polyurethane adhesive according to any one of claims 1 to 6, which comprises the steps of:
heating carborane polyester diol to 100-120 ℃ in a nitrogen atmosphere, cooling to 20-30 ℃ after vacuum dehydration, adding diisocyanate and a solvent, heating to 56-70 ℃, reacting for 4-8 hours, adding a chain extender and a catalyst, continuing to react for 4-8 hours to obtain an isocyanate-terminated urethane prepolymer, adding a hydrophilic monomer, reacting for 4-8 hours, adding the solvent during the reaction to reduce the viscosity, cooling to room temperature, adding an alkaline aqueous solution to neutralize for more than 2 hours, dispersing the prepared polyurethane solution into deionized water under rapid stirring, and distilling under reduced pressure at 40-60 ℃ to remove acetone to obtain the aqueous polyurethane adhesive emulsion.
8. The method of claim 7, wherein: the solvent is acetone, butanone or ethyl acetate; the solute in the alkaline aqueous solution is NaOH, KOH, triethylamine or trimethylamine.
9. The production method according to claim 7 or 8, characterized in that: the solvent is 5-10 times of the total mass of carborane polyester diol and diisocyanate.
10. The production method according to claim 7 or 8, characterized in that: the concentration of the alkaline aqueous solution is 20-80%.
11. The method of manufacturing according to claim 10, wherein: the number of moles of solute in the basic aqueous solution is the same as the hydrophilic monomer.
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| CN115627146A (en) * | 2022-10-07 | 2023-01-20 | 宁波捷傲创益新材料有限公司 | Preparation method of novel adhesive for aluminum plastic film |
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