CN117986524A - High-performance moisture-curing polyurea resin and preparation method thereof - Google Patents
High-performance moisture-curing polyurea resin and preparation method thereof Download PDFInfo
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- CN117986524A CN117986524A CN202410134338.XA CN202410134338A CN117986524A CN 117986524 A CN117986524 A CN 117986524A CN 202410134338 A CN202410134338 A CN 202410134338A CN 117986524 A CN117986524 A CN 117986524A
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- polyurea resin
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- 229920002396 Polyurea Polymers 0.000 title claims abstract description 70
- 229920005989 resin Polymers 0.000 title claims abstract description 39
- 239000011347 resin Substances 0.000 title claims abstract description 39
- 238000013008 moisture curing Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- -1 bisphenol compound Chemical class 0.000 claims abstract description 19
- 238000001723 curing Methods 0.000 claims abstract description 19
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 13
- 229920000570 polyether Polymers 0.000 claims abstract description 13
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 10
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004970 Chain extender Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 229920005862 polyol Polymers 0.000 claims abstract description 9
- 150000003077 polyols Chemical class 0.000 claims abstract description 9
- 229930185605 Bisphenol Natural products 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- WYNCHZVNFNFDNH-UHFFFAOYSA-N Oxazolidine Chemical compound C1COCN1 WYNCHZVNFNFDNH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 239000013067 intermediate product Substances 0.000 claims description 10
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 8
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 6
- 230000004224 protection Effects 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 229920001451 polypropylene glycol Polymers 0.000 claims description 4
- 150000002466 imines Chemical class 0.000 claims description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 2
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 claims description 2
- ODJUOZPKKHIEOZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3,5-dimethylphenyl)propan-2-yl]-2,6-dimethylphenol Chemical compound CC1=C(O)C(C)=CC(C(C)(C)C=2C=C(C)C(O)=C(C)C=2)=C1 ODJUOZPKKHIEOZ-UHFFFAOYSA-N 0.000 claims description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002274 desiccant Substances 0.000 claims description 2
- 239000003085 diluting agent Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002671 adjuvant Substances 0.000 claims 1
- 150000002009 diols Chemical class 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 abstract description 2
- 150000003949 imides Chemical class 0.000 abstract 1
- 238000010345 tape casting Methods 0.000 abstract 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 14
- 125000003118 aryl group Chemical group 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000000576 coating method Methods 0.000 description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920000805 Polyaspartic acid Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 108010064470 polyaspartate Proteins 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- DZARITHRMKPIQB-UHFFFAOYSA-N 2-(2-propan-2-yl-1,3-oxazolidin-3-yl)ethanol Chemical compound CC(C)C1OCCN1CCO DZARITHRMKPIQB-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 241000233805 Phoenix Species 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical group C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a high-performance moisture-curable polyurea resin and a preparation method thereof, wherein the high-performance moisture-curable polyurea resin comprises the following components in parts by mass: 50-80 parts of polyether polyol, 30-50 parts of isocyanate, 5-10 parts of modified epoxy resin, 5-10 parts of curing agent, 0.5-1 part of chain extender and 1-5 parts of auxiliary agent; wherein the modified epoxy resin is obtained by reacting triglycidyl isocyanurate with bisphenol compound. The high-performance moisture-curing polyurea resin provided by the invention has the advantages that the mechanical property, the waterproof property and the stability are enhanced by introducing the modified epoxy resin which has good compatibility with polyether polyol and isocyanate and has a hyperbranched structure; the imide or oxazolidine latent curing agent is used as the curing agent, so that the foaming problem caused by carbon dioxide gas generated in the conventional curing process is avoided, and the strength, durability and adhesive force of the paint film are improved; can be used for manual knife coating construction, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a high-performance moisture-curing polyurea resin and a preparation method thereof.
Background
The polyurea is an elastomer substance generated by the reaction of isocyanate component and amino compound component, has the characteristics of higher tensile strength, tearing strength, water resistance, acid-base resistance and the like, and has very wide application in the aspects of water resistance, corrosion resistance, impact abrasion resistance, surface decoration and the like.
Polyurea materials can be classified into aromatic polyureas, aliphatic polyureas, and polyaspartic acid ester polyureas, depending on the type of material. The aromatic polyurea consists of a component A and a component B, wherein the component A is a semi-prepolymer synthesized by the reaction of NCO and hydroxyl polyether, and the component B comprises amino-terminated polyether and an aromatic chain extender, has excellent water resistance, alkali resistance and acid resistance, is the most commonly used polyurea material at present, and occupies 70% of the market share of the polyurea material. The component A of the aliphatic polyurea is a semi-prepolymer obtained by polymerization reaction of aliphatic NCO and amino polyether, and the component B is composed of amino-terminated polyether, aliphatic chain extender and other auxiliary agents, and the performance of the component A is superior to that of the aliphatic polyurea. The polyaspartic acid ester polyurea is a novel aliphatic, slow-reaction and controllable polyurea material, has the characteristics of simple and convenient construction, excellent adhesive force, low-temperature curing and the like, and is rapidly developed in recent years. Although aromatic polyureas occupy a high market share in the coating field, are widely applied and have excellent performances, compared with other polyurea materials, the aromatic polyureas have the defects of aging resistance, poor ultraviolet resistance, easy color change, poor adhesive force and the like, so that the aromatic polyureas are difficult to meet the increasing requirements of various fields on the coating performances, while the other two kinds of polyurea materials have better performances than the aromatic polyureas, but are relatively expensive, and cannot replace the aromatic polyureas in a plurality of fields, so that the improvement of the aromatic polyureas has good social and economic benefits. In recent years, there have been many improvements made to aromatic polyureas, and the improvement method has been mainly focused on improvement of one of A, B components, and some results have been achieved. However, due to the nature of the amino groups and NCO in the components, the two-component polyurea still has the problems of high reaction speed, high film forming speed, low hardness, poor adhesive force and the like.
The one-component polyureas can avoid these problems. The single-component polyurea is prepared by mixing A, B components in proportion in advance, mixing is not needed during use, the single-component polyurea is directly taken out, the construction is simple and convenient, and the performance of the single-component polyurea is greatly improved compared with that of the double-component polyurea, so that the single-component polyurea has wider application range. However, the single-component polyurea coating products on the market are still relatively rare, and the performances of the single-component polyurea coating products in various aspects are difficult to meet the requirements of the coating in various fields, so that more problems are required to be solved.
In view of the foregoing, there is a need to develop a new technical solution to solve the problems in the prior art.
Disclosure of Invention
Based on the method, the invention provides the high-performance moisture-curing polyurea resin, which takes the components such as polyether polyol, isocyanate, modified epoxy resin and the like as raw materials, so that the multiple performances of the product are effectively improved, and the problem that the mechanical properties of the existing polyurea material are weaker and cannot meet the actual use requirements is solved.
The invention aims at providing a high-performance moisture-curing polyurea resin, which comprises the following components in parts by weight:
Wherein,
The modified epoxy resin is obtained by reacting triglycidyl isocyanurate with bisphenol compound.
Further, the isocyanate is selected from one or more of diphenylmethane diisocyanate and toluene diisocyanate.
Further, the polyether polyol is selected from one or more of polyoxypropylene glycol, polyoxypropylene triol and polytetrahydrofuran ether glycol.
Further, the curing agent is one or more selected from imine curing agents and oxazolidine curing agents.
Further, the bisphenol compound is selected from one or more of bisphenol A, bisphenol F, bisphenol S, tetramethyl bisphenol A, tetramethyl bisphenol F.
Further, the auxiliary agent is selected from one or more of leveling agent, defoamer, catalyst, diluent, drying agent and filler.
Another object of the present invention is to provide a method for preparing a high performance moisture-curable polyurea resin, comprising the steps of:
S1, mixing triglycidyl isocyanurate and bisphenol compound, adding a catalyst under the protection of inert gas, heating for reaction, and purifying to obtain modified epoxy resin;
S2, mixing polyether polyol with isocyanate, heating for reaction, and adding the modified epoxy resin and a chain extender after the NCO content reaches the standard, and heating and stirring for reaction to obtain an intermediate product;
and S3, mixing the curing agent, the auxiliary agent and the intermediate product, and stirring and defoaming to obtain the high-performance moisture-curing polyurea resin.
Further, in the step S1, the temperature of the heating reaction is 60-70 ℃ and the time is 40-50h.
Further, in step S2, the temperature of the heating reaction is 70-90 ℃.
Further, in the step S2, the temperature of the heating and stirring reaction is 60-70 ℃ and the time is 2-5h.
The invention has the following beneficial effects:
1. The high-performance moisture-curing polyurea resin is prepared from polyether polyol, aromatic isocyanate, modified epoxy resin and the like serving as raw materials. The modified epoxy resin is obtained by reacting triglycidyl isocyanurate and bisphenol compound, and is introduced into polyurea resin, so that on one hand, the modified epoxy resin has good compatibility with polyether polyol and isocyanate, and chemical crosslinking is easier to form and intermolecular acting force is generated; on the other hand, the modified epoxy resin has a hyperbranched structure, so that a more stable and three-dimensional crosslinking structure can be formed, and after the modified epoxy resin is compounded with aromatic isocyanate, the crosslinking density can be increased, thereby further enhancing the mechanical properties such as hardness and the like, and the waterproof performance and stability.
2. The high-performance moisture-curing polyurea resin product prepared by the invention takes the imine or oxazolidine latent curing agent as the curing agent, can form an amine-containing compound after being contacted with water in the air, then reacts with NCO groups of the main resin, and is cured to form a polyurea material, and the foaming problem caused by carbon dioxide gas generated in the conventional curing process is avoided, so that the strength, durability and adhesive force of a paint film are improved. In addition, the polyurea resin product can be manually knife-coated, does not need special construction equipment, does not pollute the surrounding environment, and has good application prospect.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following examples are set forth. The starting materials, reactions and workup procedures used in the examples are those commonly practiced in the market and known to those skilled in the art unless otherwise indicated.
The words "preferred," "more preferred," and the like in the present disclosure refer to embodiments of the present disclosure that may provide certain benefits in some instances. However, other embodiments may be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
It should be understood that, except in any operating examples, or where otherwise indicated, quantities or all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties to be obtained by the present invention.
The polytetrahydrofuran ether glycol in the embodiment of the invention is Mitsubishi PTMG1000.
The curing agent in the embodiment of the invention is 2-isopropyl-3-hydroxyethyl-1, 3-oxazolidine.
The chain extender in the embodiment of the invention is ethylenediamine.
The leveling agent in the embodiment of the invention is CAB381-20.
The defoaming agent in the embodiment of the invention is BYK-141.
The polytetrahydrofuran ether glycol in the embodiment of the invention is dehydrated before use: heating and stirring polytetrahydrofuran ether glycol at-0.095 MPa and 110 deg.C for 2-3 hr, and stopping when water content is less than 0.05%.
In the embodiment of the invention, "parts" refer to parts by weight.
Example 1
A high-performance moisture-curing polyurea resin comprises the following components in parts by weight:
the preparation method of the high-performance moisture-curable polyurea resin comprises the following steps:
S1, mixing triglycidyl isocyanurate and bisphenol A in a mass ratio of 0.9:1 by taking tetrahydrofuran as a solvent, adding tetrabutylammonium bromide in an amount of 0.8wt% of a reaction system under the protection of nitrogen, reacting for 50 hours at65 ℃, cooling, adding cyclohexane for sedimentation, washing and drying to obtain modified epoxy resin;
s2, mixing polytetrahydrofuran ether glycol and toluene diisocyanate according to the parts by weight, reacting for 3 hours at 85 ℃, sampling according to GB/T3186-2006, measuring the NCO content, and stopping the reaction after reaching a theoretical value;
Then adding the modified epoxy resin and a chain extender, and stirring at 65 ℃ for reaction for 3 hours to obtain an intermediate product;
and S3, adding the curing agent, the leveling agent, the defoaming agent and the dibutyl tin dilaurate into the intermediate product, stirring under the pressure of-0.095 MPa, and defoaming for 0.5h to obtain the high-performance moisture-curing polyurea resin.
Example 2
A high-performance moisture-curing polyurea resin comprises the following components in parts by weight:
the preparation method of the high-performance moisture-curable polyurea resin comprises the following steps:
s1, mixing triglycidyl isocyanurate and bisphenol A in a mass ratio of 0.9:1 by taking tetrahydrofuran as a solvent, adding tetrabutylammonium bromide in an amount of 0.8wt% of a reaction system under the protection of nitrogen, reacting for 50 hours at 70 ℃, cooling, adding cyclohexane for sedimentation, washing and drying to obtain modified epoxy resin;
s2, mixing polytetrahydrofuran ether glycol and toluene diisocyanate according to the parts by weight, reacting for 3 hours at 85 ℃, sampling according to GB/T3186-2006, measuring the NCO content, and stopping the reaction after reaching a theoretical value;
then adding the modified epoxy resin and a chain extender, and stirring at 70 ℃ for reaction for 3 hours to obtain an intermediate product;
and S3, adding the curing agent, the leveling agent, the defoaming agent and the dibutyl tin dilaurate into the intermediate product, stirring under the pressure of-0.095 MPa, and defoaming for 0.5h to obtain the high-performance moisture-curing polyurea resin.
Example 3
A high-performance moisture-curing polyurea resin comprises the following components in parts by weight:
the preparation method of the high-performance moisture-curable polyurea resin comprises the following steps:
s1, mixing triglycidyl isocyanurate and bisphenol A in a mass ratio of 0.9:1 by taking tetrahydrofuran as a solvent, adding tetrabutylammonium bromide in an amount of 0.8wt% of a reaction system under the protection of nitrogen, reacting for 50 hours at 70 ℃, cooling, adding cyclohexane for sedimentation, washing and drying to obtain modified epoxy resin;
s2, mixing polytetrahydrofuran ether glycol and toluene diisocyanate according to the parts by weight, reacting for 3 hours at 85 ℃, sampling according to GB/T3186-2006, measuring the NCO content, and stopping the reaction after reaching a theoretical value;
Then adding the modified epoxy resin and a chain extender, and stirring at 65 ℃ for reacting for 4 hours to obtain an intermediate product;
and S3, adding the curing agent, the leveling agent, the defoaming agent and the dibutyl tin dilaurate into the intermediate product, stirring under the pressure of-0.095 MPa, and defoaming for 0.5h to obtain the high-performance moisture-curing polyurea resin.
Comparative example 1
The polyurea resin, this comparative example differs from example 1 in that: the modified epoxy resin was replaced with conventional epoxy resin E44 (phoenix brand WSR 6101) by the same mass as in example 1.
Comparative example 2
The polyurea resin, this comparative example differs from example 1 in that: the same mass of toluene diisocyanate was replaced with dicyclohexylmethane diisocyanate, and the other components and the production method were the same as in example 1.
Test case
The polyurea resins prepared in examples and comparative examples were subjected to performance testing.
The testing method comprises the following steps: hardness, elongation at break, tensile strength and water absorption were tested with reference to GB/T23446-2009 and GB/T16777-2008 standards.
The test results are shown in Table 1.
TABLE 1 Performance test results
| Project | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Hardness (Shore A) | 98 | 99 | 96 | 89 | 85 |
| Elongation at break (%) | 542 | 538 | 526 | 475 | 498 |
| Tensile Strength (MPa) | 30.5 | 30.4 | 30.0 | 24.4 | 26.3 |
| Water absorption (%) | 3.3 | 3.3 | 3.4 | 4.4 | 4.0 |
As can be seen from Table 1, the high-performance moisture-curable polyurea resin prepared in the examples of the present invention has the advantages of high hardness, high tensile strength, low water absorption, etc., while the comparative examples 1-2 have various reduced properties of the coating due to the replacement of the modified epoxy resin with a conventional epoxy resin or the replacement of the isocyanate with an aliphatic isocyanate. In conclusion, the invention has excellent application prospect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The high-performance moisture-curable polyurea resin is characterized by comprising the following components in parts by weight:
Wherein,
The modified epoxy resin is obtained by reacting triglycidyl isocyanurate with bisphenol compound.
2. The high performance moisture-curable polyurea resin of claim 1, wherein the isocyanate is selected from one or more of diphenylmethane diisocyanate, toluene diisocyanate.
3. The high performance moisture-curable polyurea resin of claim 1, wherein the polyether polyol is selected from one or more of the group consisting of polyoxypropylene diol, polyoxypropylene triol, polytetrahydrofuran ether diol.
4. The high performance moisture curable polyurea resin of claim 1, wherein the curing agent is selected from one or more of an imine curing agent, an oxazolidine curing agent.
5. The high performance moisture-curable polyurea resin of claim 1, wherein the bisphenol compound is selected from one or more of bisphenol a, bisphenol F, bisphenol S, tetramethyl bisphenol a, tetramethyl bisphenol F.
6. The high performance moisture curable polyurea resin of claim 1, wherein the adjuvant is selected from one or more of leveling agents, defoamers, catalysts, diluents, drying agents, fillers.
7. The method for preparing a high performance moisture curable polyurea resin according to any one of claims 1 to 6, comprising the steps of:
S1, mixing triglycidyl isocyanurate and bisphenol compound, adding a catalyst under the protection of inert gas, heating for reaction, and purifying to obtain modified epoxy resin;
S2, mixing polyether polyol with isocyanate, heating for reaction, and adding the modified epoxy resin and a chain extender after the NCO content reaches the standard, and heating and stirring for reaction to obtain an intermediate product;
and S3, mixing the curing agent, the auxiliary agent and the intermediate product, and stirring and defoaming to obtain the high-performance moisture-curing polyurea resin.
8. The method for preparing a high-performance moisture-curable polyurea resin according to claim 7, wherein in the step S1, the heating reaction is performed at a temperature of 60 to 70 ℃ for a time of 40 to 50 hours.
9. The method for producing a high-performance moisture-curable polyurea resin according to claim 7, wherein the heating reaction is carried out at a temperature of 70 to 90 ℃.
10. The method for preparing a high-performance moisture-curable polyurea resin according to claim 7, wherein in the step S2, the temperature of the heating and stirring reaction is 60-70 ℃ for 2-5 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410134338.XA CN117986524A (en) | 2024-01-31 | 2024-01-31 | High-performance moisture-curing polyurea resin and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410134338.XA CN117986524A (en) | 2024-01-31 | 2024-01-31 | High-performance moisture-curing polyurea resin and preparation method thereof |
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