CN115651570A - Adhesive for wet curtain paper and preparation method thereof - Google Patents
Adhesive for wet curtain paper and preparation method thereof Download PDFInfo
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- CN115651570A CN115651570A CN202211316641.9A CN202211316641A CN115651570A CN 115651570 A CN115651570 A CN 115651570A CN 202211316641 A CN202211316641 A CN 202211316641A CN 115651570 A CN115651570 A CN 115651570A
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 60
- 239000000853 adhesive Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title description 6
- 239000000178 monomer Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 238000004132 cross linking Methods 0.000 claims abstract description 20
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 19
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 18
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 13
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 6
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 4
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 4
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 3
- 102100026735 Coagulation factor VIII Human genes 0.000 claims description 3
- 101000911390 Homo sapiens Coagulation factor VIII Proteins 0.000 claims description 3
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000001804 emulsifying effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- 235000005074 zinc chloride Nutrition 0.000 claims description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 2
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 2
- 229960001763 zinc sulfate Drugs 0.000 claims description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 2
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 claims 1
- 239000000839 emulsion Substances 0.000 abstract description 4
- -1 hydroxyl vinyl Chemical group 0.000 abstract description 4
- 229920000058 polyacrylate Polymers 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract description 3
- 229920002554 vinyl polymer Polymers 0.000 abstract description 3
- 230000000977 initiatory effect Effects 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 238000007342 radical addition reaction Methods 0.000 abstract description 2
- 150000003254 radicals Chemical class 0.000 abstract description 2
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 22
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 238000009835 boiling Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004971 Cross linker Substances 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008601 oleoresin Substances 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000141 poly(maleic anhydride) Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the technical field of adhesives, in particular to an adhesive for wet curtain paper, which comprises the following components in percentage by weight: 2 to 6 percent of polyvinyl alcohol, 35 to 45 percent of monomer, 0.5 to 1.5 percent of emulsifier, 1 to 5 percent of hydroxyl crosslinking monomer, 1 to 5 percent of metal crosslinking agent, 0.1 to 1 percent of catalyst and the balance of water. The method utilizes the monomer and the hydroxyl crosslinking monomer to carry out free radical addition polymerization reaction under the double protection of polyvinyl alcohol and an emulsifier and the initiation of a catalyst to synthesize the hydroxyl vinyl acetate-acrylic emulsion; hydroxyl in the hydroxyl vinyl acetate-acrylic emulsion provides a crosslinking group to further perform crosslinking reaction with a subsequently added polyvalent metal crosslinking agent to form a crosslinked vinyl acetate-acrylic polymer, and the adhesive formed by the polymer has good water resistance and adhesive force and keeps excellent adhesive property on wet curtain paper in a dry state, a wet saturated state and a dry-wet cycle state.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to an adhesive for wet curtain paper and a preparation method thereof.
Background
The wet curtain-fan cooling system is the most effective method for cooling, humidifying and sterilizing an industrial factory building and an agricultural planting and breeding shed, the wet curtain paper is the core component of the wet curtain-fan cooling system, cooling water flows through the wet curtain paper with a corrugated laminated structure from top to bottom to form a water curtain, and the air inlet side passes through the water curtain to cool, humidify and sterilize, so that the air temperature, humidity and quality of the factory building or the shed are effectively adjusted. The wet curtain paper with the corrugated laminated structure is formed by bonding corrugated wet curtain paper by using an adhesive and heating and drying the corrugated wet curtain paper, and whether the adhesive can maintain excellent bonding force in a dry state, a wet saturation state and a dry-wet cycle or not influences the stability and the using effect of the whole wet curtain cooling system.
The wet curtain paper adhesives are generally classified into thermosetting liquid resin adhesives, hot-melt solid hot-melt adhesives, volatile dry-curing oleoresin adhesives, and volatile dry-curing aqueous resin adhesives. The thermosetting liquid resin adhesive and the hot-melt solid hot melt adhesive need high temperature during coating, and have high energy consumption and poor coating operability. The volatile dry-curing type oleoresin adhesive and the volatile dry-curing type water-based resin adhesive are simple and convenient to coat, good in operability and low in energy consumption of volatilization and drying, and become adhesives selected by most wet curtain paper processes; but the oily resin adhesive contains an organic solvent, so that the oily resin adhesive pollutes the environment in use and has potential safety hazard; the volatile matter in the water-based resin adhesive is water, so that the water-based resin adhesive is environment-friendly and safe, and is gradually the priority in the wet curtain paper industry. The existing domestic water-based resin wet curtain paper adhesive can keep a certain adhesive force in a dry state, and the adhesive force is low due to poor water resistance of the adhesive in a wetting state, so that the use of wet curtain paper is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an adhesive for wet curtain paper.
In order to achieve the above purpose, the invention is realized by the following technical scheme.
The adhesive for the wet curtain paper comprises the following components in percentage by weight: 2 to 6 percent of polyvinyl alcohol, 35 to 45 percent of monomer, 0.5 to 1.5 percent of emulsifier, 1 to 5 percent of hydroxyl crosslinking monomer, 1 to 5 percent of metal crosslinking agent, 0.1 to 1 percent of catalyst and the balance of water.
Preferably, the polyvinyl alcohol is selected from one or more of BP-05, BP-24, BP-20 and BP-17.
Preferably, the monomer is selected from one or more of vinyl acetate, BA (butyl acrylate), 2-EHA (isooctyl acrylate), AA (acrylic acid).
Preferably, the emulsifier is one or two selected from SDS (sodium dodecyl sulfate) and fatty alcohol-polyoxyethylene ether.
Preferably, the hydroxyl crosslinking monomer is selected from one or more of HEA (hydroxyethyl acrylate), HEMA (hydroxyethyl methacrylate), NMA (N-methylolacrylamide), HPA (hydroxypropyl acrylate), HPMA (hydrolyzed polymaleic anhydride).
Preferably, the catalyst is selected from one or more of KPS (potassium persulfate), SPS (sodium persulfate), APS (ammonium persulfate).
Preferably, the metal crosslinking agent is selected from one or more of aluminum nitrate, aluminum sulfate, aluminum chloride, zinc sulfate, zinc nitrate, zinc chloride, zinc phosphate, magnesium nitrate, magnesium sulfate, and magnesium chloride.
The invention also aims to provide a preparation method of the adhesive for the wet curtain paper, which comprises the following steps:
s1: putting a certain amount of water into a reaction kettle, adding polyvinyl alcohol while stirring, heating to 90 ℃, preserving heat for 2 hours, and then cooling to 65 ℃;
s2: adding the rest water, the emulsifier, the monomer and the crosslinking monomer into a prepolymerization kettle in sequence, and emulsifying for 30min to obtain an emulsified monomer;
s3: adding 10% of the emulsified monomer in the step S2 into the reaction kettle in the step S1, and adding a catalyst to react for 45min;
s4: dropwise adding the rest emulsified monomers for 4 hours at 70 ℃, and cooling after the temperature is increased to 90 ℃ after the dropwise adding is finished;
s5: removing residual monomers by using vacuum in the cooling process, and adding a metal cross-linking agent at a constant speed for reacting for 30min when the temperature is reduced to 50 ℃;
s6: and (3) discharging when the temperature is reduced to 40 ℃ to obtain the adhesive for the wet curtain paper.
The application has the following beneficial effects: the method synthesizes the hydroxyl vinyl acetate-acrylic emulsion by utilizing the free radical addition polymerization reaction of the monomer and the crosslinking monomer under the double protection of polyvinyl alcohol and an emulsifier and under the initiation of a catalyst; hydroxyl in the hydroxyl vinyl acetate-acrylic emulsion provides a crosslinking group to further perform crosslinking reaction with a polyvalent metal crosslinking agent added subsequently to form a crosslinked vinyl acetate-acrylic polymer, and the adhesive formed by the polymer has good water resistance and adhesive force and keeps excellent adhesive property on wet curtain paper in a dry state, a wet saturated state and a dry-wet cycle state.
Detailed Description
The invention is further described below with reference to examples, but the scope of the invention as claimed is not limited to the scope of the examples.
TABLE 1 formulation data Table for various examples and comparative examples
Wherein, the metal cross-linking agent in the embodiments 1 to 4 and the comparative example 2 is prepared by mixing aluminum nitrate, aluminum sulfate and aluminum chloride, and magnesium nitrate according to the weight ratio of 1; the metal crosslinker in comparative example 4 was calcium chloride; the hydroxyl crosslinking monomers in examples 1 to 4, comparative example 1 and comparative example 4 were each composed of HEA, HEMA, NMA, HPA mixed in a weight ratio of 2; the formulations of examples 1 to 4 were designed by changing the kind and amount of polyvinyl alcohol, the kind and amount of monomer, the kind and amount of emulsifier and the kind of catalyst.
The adhesives of examples 1 to 4 and comparative examples 1 to 4 were prepared according to the formulation in table 1 above and the preparation method described below, respectively. The preparation method comprises the following steps:
s1: adding about 30% of water into a reaction kettle, adding polyvinyl alcohol while stirring, heating to 90 ℃, then preserving heat for 2 hours, and then cooling to 65 ℃;
s2: sequentially adding the rest 70% of water, an emulsifier, a monomer and a crosslinking monomer into a prepolymerization kettle, and emulsifying for 30min to obtain an emulsified monomer;
s3: adding 10% of the emulsified monomer in the step S2 into the reaction kettle in the step S1, and adding a catalyst to react for 45min;
s4: dropwise adding the rest emulsified monomers for 4 hours at 70 ℃, and cooling after the temperature is increased to 90 ℃ after the dropwise adding is finished;
s5: removing residual monomers by using vacuum in the cooling process, and adding a metal cross-linking agent at a constant speed for reacting for 30min when the temperature is reduced to 50 ℃;
s6: and (3) discharging when the temperature is reduced to 40 ℃ to obtain the adhesive for the wet curtain paper.
And testing the bonding performance of the prepared adhesive according to NY/T1967-2010 paper wet curtain performance testing method and NY/T2707-2015 paper wet curtain quality evaluation technical specification. This patent has tested under the natural drying state and under the wet saturation state compressive strength, peel strength and cohesive strength of wet curtain paper. Wherein, the compression strength and the peel strength are tested by wet curtain paper with the specification of 70-90-150, namely the height of the corrugation is 7mm, the included angle of the corrugation is 90 degrees, and the thickness of the wet curtain paper is 150mm. The compression strength test was carried out according to 5.2 in the specification of NY/T1967-2010, and the peel strength test was carried out according to 5.2 in the specification of NY/T1967-2010. The bond strength was determined according to 6.7 in NY/T2707-2015 specification. In the natural drying state, a wet curtain paper sample with the width of 300mm and the height of 500mm is selected for testing the bonding strength, and in the natural drying state, the wet curtain paper sample is kept in a horizontal state and freely falls from the position 1m away from the smooth cement ground, and the glue opening condition is observed. In a wet saturation state, a wet curtain paper sample with the width of 100mm and the height of 100mm is selected for testing the bonding strength, and after the wet curtain paper sample is soaked in a boiling water pot for 2 hours, the glue failure condition is observed; and (3) selecting a wet curtain paper sample with the width of 150mm and the height of 150mm for dry-wet state bonding strength test, soaking the wet curtain paper sample in a boiling water pot for 1h, taking out the wet curtain paper sample, drying the wet curtain paper sample in an oven at the temperature of 60 ℃, repeating 5 cycles by taking the cycle as one cycle, and observing the glue failure condition in the test process. In addition, the solid content test method is as follows: weighing a proper amount of adhesive in a container made of tinfoil paper, weighing the weight change at 100 ℃ for 120mins, and calculating the solid content of the adhesive; the pH test method comprises the following steps: adopting a pH meter; the viscosity test method comprises the following steps: testing by a BROOKFIELD viscometer, no. 5 rotor/10 rpm; the appearance test method comprises the following steps: the judgment was made by visual observation.
Wet curtain paper is prepared from the adhesives prepared in the above examples 1 to 4 and comparative examples 1 to 4, and the wet curtain paper with the specification listed in the above method is selected for testing, and the test data is as follows:
TABLE 2 test data tables for different examples and comparative examples
As can be seen from table 2, in examples 1 to 4, a technical scheme of introducing a hydroxyl functional group into a vinyl acetate polymer and adding a metal crosslinking agent is adopted, so that the adhesive obtains excellent performance in a performance test. The compressive strength, peel strength and adhesive strength of the adhesive meet the requirements of NY/T2707-2015 technical Specification for quality evaluation of wet paper curtains under dry conditions, wet conditions and even dry-wet circulation conditions, wherein the performance of example 3 is optimal.
The invention takes the formulation system of the embodiment 3 as the basis, and takes the using conditions of the hydroxyl crosslinking monomer and the metal crosslinking agent as the factor variables, and designs the formulations of the comparative examples 1 to 4. Wherein comparative example 1 used a hydroxyl crosslinking monomer without the addition of a metal crosslinking agent; comparative example 2 contains no hydroxyl crosslinking monomer but a metal crosslinking agent was added; comparative example 3 both the hydroxyl crosslinking monomer and the metal crosslinking agent were omitted; comparative example 4 contains a hydroxyl crosslinking monomer, but calcium chloride was used as the polyvalent metal crosslinking agent.
In comparison with example 3, comparative example 1 has 40 to 50% reduction in compressive strength and peel strength in the dry state; under the wet saturation state, the compression strength and the peeling strength of the product are reduced by 60 percent; in a dry state bonding strength test, the adhesive is partially broken; in the wet saturation bonding strength test, the adhesive is opened; in the dry-wet cycle strength test, it came loose on the 2 nd immersion in boiling water.
In comparison with example 3, comparative example 2 has a decrease in compressive strength and peel strength of 30 to 40% in the dry state; under the wet saturation state, the compressive strength and the peel strength of the material are reduced by 40 to 50 percent; in a dry bonding strength test, the adhesive does not crack; in the wet saturation bonding strength test, the adhesive is partially broken; in the dry-wet cycle strength test, it came loose on the 2 nd boiling water soak.
In comparison with example 3, comparative example 3 has 50% reduction in compressive strength and peel strength in the dry state; under the wet saturation state, the compression strength and the peeling strength of the composite material are reduced by 70 percent; in a dry state bonding strength test, the adhesive is partially broken; in the wet saturation bonding strength test, the adhesive is opened; in the dry-wet cycle strength test, it came loose on the 1 st immersion in boiling water.
In comparison with example 3, comparative example 4 has a 20-30% reduction in compressive strength and peel strength in the dry state; under the wet saturation state, the compression strength and the peeling strength of the material are reduced by 40 percent; it did not split during the dry bond strength test. In the wet saturation bond strength test, the adhesive is partially broken; in the dry-wet cycle strength test, it ran open on the 3 rd boiling water soak.
Table 3 table of comparative data of performance of example 3 and comparative examples 1 to 4
* : comparative example performance decreased,% = (example 3-comparative example)/example 3 x 100
The following conclusions can be drawn from a combination of tables 1 to 3: hydroxyl functional groups are introduced into the vinyl acetate-acrylic polymer, and a metal cross-linking agent is added, so that the adhesive can obtain excellent performance. The absence of hydroxyl functionality or the addition of metal crosslinkers results in a substantial reduction in performance. Neither hydroxyl functional groups nor metal crosslinkers were introduced, resulting in a further significant reduction in performance (comparative example 3). The introduction of hydroxyl functional groups, but the addition of calcium chloride as a metal crosslinker, also resulted in a large reduction in performance (comparative example 4).
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The adhesive for the wet curtain paper is characterized by comprising the following components in percentage by weight: 2 to 6 percent of polyvinyl alcohol, 35 to 45 percent of monomer, 1 to 5 percent of hydroxyl crosslinking monomer, 0.5 to 1.5 percent of emulsifier, 1 to 5 percent of metal crosslinking agent, 0.1 to 1 percent of catalyst and the balance of water.
2. The adhesive for wet curtain paper as claimed in claim 1, wherein the polyvinyl alcohol is selected from one or more of BP-05, BP-24, BP-20 and BP-17.
3. The adhesive for wet curtain paper as claimed in claim 1, wherein the monomer is selected from one or more of vinyl acetate, BA, 2-EHA and AA.
4. The adhesive for wet curtain paper as claimed in claim 1, wherein the emulsifier is one or two selected from sodium dodecyl sulfate and fatty alcohol-polyoxyethylene ether.
5. The adhesive for wet curtain paper as claimed in claim 1, wherein the hydroxyl crosslinking monomer is selected from one or more of HEA, HEMA, HPA, NMA and HPMA.
6. The adhesive for wet curtain paper as claimed in claim 1, wherein the catalyst is selected from one or more of KPS, SPS and APS.
7. The adhesive for wet curtain paper as claimed in claim 1, wherein the metal cross-linking agent is selected from one or more of aluminum nitrate, aluminum sulfate, aluminum chloride, zinc sulfate, zinc nitrate, zinc chloride, zinc phosphate, magnesium nitrate, magnesium sulfate, and magnesium chloride.
8. A method for preparing the adhesive for wet curtain paper as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
s1: putting a certain amount of water into a reaction kettle, adding polyvinyl alcohol while stirring, heating to 90 ℃, keeping the temperature for 2 hours, and then cooling to 65 ℃;
s2: sequentially adding the rest water, an emulsifying agent, a monomer and a crosslinking monomer into a prepolymerization kettle, and emulsifying for 30min to obtain an emulsified monomer;
s3: adding 10% of the emulsified monomer in the step S2 into the reaction kettle in the step S1, and adding a catalyst to react for 45min;
s4: the temperature reaches 70 ℃; dropwise adding the rest emulsified monomers within 4 hours, and cooling after the temperature is increased to 90 ℃;
s5: removing residual monomers by using vacuum in the cooling process, and adding a metal cross-linking agent at a constant speed for reacting for 30min when the temperature is reduced to 50 ℃;
s6: and (3) discharging when the temperature is reduced to 40 ℃ to obtain the adhesive for the wet curtain paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211316641.9A CN115651570A (en) | 2022-10-26 | 2022-10-26 | Adhesive for wet curtain paper and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211316641.9A CN115651570A (en) | 2022-10-26 | 2022-10-26 | Adhesive for wet curtain paper and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115651570A true CN115651570A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211316641.9A Pending CN115651570A (en) | 2022-10-26 | 2022-10-26 | Adhesive for wet curtain paper and preparation method thereof |
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| CN (1) | CN115651570A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050032970A1 (en) * | 2003-08-04 | 2005-02-10 | Martin Jakob | Water-resistant adhesives, their preparation and use |
| CN103140514A (en) * | 2010-08-02 | 2013-06-05 | 瓦克化学股份公司 | Process for preparing vinyl acetate-ethylene copolymers by means of emulsion polymerization |
| WO2017020513A1 (en) * | 2015-07-31 | 2017-02-09 | 华南理工大学 | Hydroxyl polyacrylate emulsion and preparation method and application thereof |
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2022
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050032970A1 (en) * | 2003-08-04 | 2005-02-10 | Martin Jakob | Water-resistant adhesives, their preparation and use |
| CN103140514A (en) * | 2010-08-02 | 2013-06-05 | 瓦克化学股份公司 | Process for preparing vinyl acetate-ethylene copolymers by means of emulsion polymerization |
| WO2017020513A1 (en) * | 2015-07-31 | 2017-02-09 | 华南理工大学 | Hydroxyl polyacrylate emulsion and preparation method and application thereof |
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Application publication date: 20230131 |