CN116656306A - Polyurethane pouring sealant - Google Patents
Polyurethane pouring sealant Download PDFInfo
- Publication number
- CN116656306A CN116656306A CN202210147832.0A CN202210147832A CN116656306A CN 116656306 A CN116656306 A CN 116656306A CN 202210147832 A CN202210147832 A CN 202210147832A CN 116656306 A CN116656306 A CN 116656306A
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- Prior art keywords
- component
- polyether polyol
- polyurethane
- pouring sealant
- agent
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 64
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 64
- 239000000565 sealant Substances 0.000 title claims abstract description 51
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 43
- 229920000570 polyether Polymers 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 38
- 229920005862 polyol Polymers 0.000 claims abstract description 38
- 150000003077 polyols Chemical class 0.000 claims abstract description 38
- 239000002270 dispersing agent Substances 0.000 claims abstract description 33
- 238000009736 wetting Methods 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 27
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 21
- 239000004359 castor oil Substances 0.000 claims abstract description 14
- 235000019438 castor oil Nutrition 0.000 claims abstract description 14
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 11
- 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 24
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000004382 potting Methods 0.000 claims description 17
- 239000013530 defoamer Substances 0.000 claims description 13
- 125000000129 anionic group Chemical group 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 150000002513 isocyanates Chemical class 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- 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
-
- 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
- C09J175/08—Polyurethanes from polyethers
Abstract
The invention provides a polyurethane pouring sealant, which comprises a material A component and a material B component; the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide; the material B component comprises polymeric MDI; the mixing auxiliary agent is a mixture composed of a wetting dispersant, a viscosity reducer and an antifoaming agent. The polyurethane pouring sealant solves the problems that the defoaming capability of the pouring sealant in the current market is insufficient to completely eliminate bubbles, and excessive defoaming agent is added to completely eliminate bubbles even if the bubbles can be completely eliminated, but the shearing strength of the polyurethane pouring sealant is affected by the excessive addition of the defoaming agent, so that the shearing strength of the polyurethane pouring sealant is reduced.
Description
Technical Field
The invention relates to the technical field of polyurethane, in particular to polyurethane pouring sealant.
Background
Along with the rapid development of the automotive electronics industry, the application scene of the pouring sealant is more and more, the application of the polyurethane pouring sealant is also increased year by year, most manufacturers are non-equipment operation, manual mixing and stirring operation when using the pouring sealant, the process can lead to the problem of bubbles caused by manual operation, the introduction of the bubbles can further lead to the appearance defect of a product, and some bubbles exist in the interior and possibly influence the final use effect.
The Chinese patent with publication number of CN105255432A discloses a polyurethane pouring sealant and a preparation method thereof, wherein the polyurethane pouring sealant consists of a component A and a component B in a mass ratio of 1:1; wherein, the component A is prepared from the following components in parts by mass: 80-100 parts of polymer polyol, 0-5 parts of small molecular alcohol, 0.1-1 part of antioxidant, 0.1-1 part of ultraviolet absorber, 0.1-1 part of light stabilizer, 0.5-8 parts of catalyst, 0.1-1 part of defoamer, 0.1-1 part of coupling agent and 0-20 parts of plasticizer; the component B is prepared from the following components in parts by mass: 20-50 parts of polyisocyanate and 40-80 parts of plasticizer. The polyurethane pouring sealant has low viscosity, low hardness, transparency after curing, few bubbles, good insulativity, good adhesion with metal and moderate curing time. However, the defoaming capability of the existing defoaming agent is insufficient to completely eliminate bubbles, and excessive amount is required to be added to completely eliminate bubbles even if the bubbles can be completely eliminated, but the excessive amount of the defoaming agent can influence the shear strength of the polyurethane pouring sealant, so that the shear strength of the polyurethane pouring sealant is reduced.
Therefore, there is a need to develop a novel polyurethane potting adhesive to avoid the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a polyurethane pouring sealant, which solves the problems that the defoaming capability of the pouring sealant in the current market is insufficient to completely eliminate bubbles, and excessive defoaming agent is added to completely eliminate bubbles even if the bubbles can be completely eliminated, but the shearing strength of the polyurethane pouring sealant is influenced by the excessive addition of the defoaming agent, so that the shearing strength of the polyurethane pouring sealant is reduced.
To achieve the above object, the composition comprises a material A component and a material B component;
the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide;
the material B component comprises polymeric MDI;
the mixing auxiliary agent is a mixture composed of a wetting dispersant, a viscosity reducer and an antifoaming agent.
The polyurethane pouring sealant has the beneficial effects that: the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide; the mixing auxiliary agent is a mixture of a wetting dispersing agent, a viscosity reducing agent and a defoaming agent, and through adding the mixing auxiliary agent, the wetting dispersing agent, the viscosity reducing agent and the defoaming agent have a synergistic effect, so that the defoaming capability of the mixing auxiliary agent is improved, no bubble is generated in the polyurethane pouring sealant, the problem that bubbles are not completely eliminated in the pouring sealant defoaming capability in the current market, and the problem that excessive defoaming agent is required to be added to completely eliminate bubbles even if the bubbles can be completely eliminated, but the excessive addition of the defoaming agent can influence the shear strength of the polyurethane pouring sealant, so that the shear strength of the polyurethane pouring sealant is reduced is solved.
Optionally, the mass ratio of the material A component to the material B component is (10-8) 1. The beneficial effects are that: the material A component and the material B component are uniformly mixed, and the mixing time is reduced.
Optionally, the castor oil accounts for 20-30% of the mass of the material A, the first polyether polyol accounts for 2-4%, the second polyether polyol accounts for 20-40%, the wetting dispersant accounts for 0.1-1%, the viscosity reducer accounts for 0.1-1%, the defoamer accounts for 0.1-1%, and the aluminum hydroxide accounts for 30-57%.
Optionally, the material B component is polymeric MDI.
Optionally, the mass ratio of the wetting dispersant, the viscosity reducer and the defoamer is 1:1:1. The beneficial effects are that: so that the synergistic effect among the wetting dispersant, the viscosity reducing agent and the antifoaming agent is maximized.
Optionally, the wetting dispersant is an anionic wetting dispersant, and the viscosity reducer is a high molecular weight alkylammonium salt copolymer.
Optionally, the wetting dispersant is BYKW969, the viscosity reducer is BYK 9076, and the defoamer is F-705.
Alternatively, the polymeric MDI comprises isocyanate and diphenylmethane diisocyanate.
Alternatively, the polymeric MDI has a viscosity of 150 to 250 mpa.s at 25 ℃. The beneficial effects are that: the mixing auxiliary agent has better defoaming effect on the polyurethane pouring sealant obtained by the polymeric MDI with the viscosity of 150-250 mPas at 25 ℃.
Optionally, the polymeric MDI is any one of polymeric MDI PAPI-27, polymeric MDI5005 and Desmodur-44V 20L.
Optionally, the castor oil has a number average molecular weight of 900 to 1000 and an average functionality of 2.7.
Optionally, the hydroxyl value of the first polyether polyol is 440-460, and the number average molecular weight of the first polyether polyol is 350-400.
Optionally, the functionality of the second polyether polyol is 3 and the number average molecular weight of the second polyether polyol is 4000 to 5000.
Alternatively, the first polyether polyol is polyether DV125 and the second polyether polyol is polyether EP-330NG.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items.
Most of the polyurethane pouring sealants in the current market use a single variety of defoamers, the single variety of defoamers does not have single multipurpose performance, the defoaming capability of the existing defoamers is insufficient to completely eliminate bubbles, and the purpose of defoaming can be achieved by adding a high proportion of defoamers, but the risk of reducing mechanical properties (reducing shear strength) exists due to the fact that the adding proportion of the defoamers in the polyurethane pouring sealants is too high.
In order to overcome the problems in the prior art, the invention aims to provide a polyurethane pouring sealant, which comprises a material A component and a material B component;
the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide;
the material B component comprises polymeric MDI;
the mixing auxiliary agent is a mixture composed of a wetting dispersant, a viscosity reducer and an antifoaming agent.
Specifically, the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide; the mixing auxiliary agent is a mixture of a wetting dispersing agent, a viscosity reducing agent and a defoaming agent, and through adding the mixing auxiliary agent, the wetting dispersing agent, the viscosity reducing agent and the defoaming agent have a synergistic effect, so that the defoaming capability of the mixing auxiliary agent is improved, no bubble is generated in the polyurethane pouring sealant, the problem that bubbles are not completely eliminated in the pouring sealant defoaming capability in the current market, and the problem that excessive defoaming agent is required to be added to completely eliminate bubbles even if the bubbles can be completely eliminated, but the excessive addition of the defoaming agent can influence the shear strength of the polyurethane pouring sealant, so that the shear strength of the polyurethane pouring sealant is reduced is solved.
In some possible embodiments of the invention, the MDI is diphenylmethane diisocyanate having the formula C 15 H 10 N 2 O 2 CAS number 101-68-8.
In some possible embodiments of the present invention, the wetting dispersant is an anionic wetting dispersant, and the function of the wetting dispersant is to increase the dispersion efficiency of the solid powder and improve the storage stability, and prevent the powder from settling and caking during storage.
In some possible embodiments of the present invention, the viscosity reducing agent is adsorbed on the particle surface, reducing the attraction between particles and preventing aggregation with each other, allowing the particles to move easily and maintaining stable viscosity and storage of the whole system.
In some possible embodiments of the present invention, the defoamer is used to eliminate bubbles, and the bubbles can be quickly destroyed by adsorbing bubbles and surface tension to enter the bubble film to thin the bubble film. The wetting dispersant, the viscosity reducer and the defoaming agent are simultaneously present in the polyurethane pouring sealant, the functions of the wetting dispersant, the viscosity reducer and the defoaming agent are respectively exerted, the viscosity of the polyurethane pouring sealant can be reduced, the acting force between molecules can be reduced, tiny bubbles are dispersed uniformly and singly, and the defoaming agent can quickly break the tiny bubbles, so that the wetting dispersant, the viscosity reducer and the defoaming agent achieve a synergistic effect.
In some embodiments of the invention, the mass ratio of the A material component to the B material component is (10-8): 1. The material A component and the material B component are uniformly mixed, the mixing time is reduced, and meanwhile, the viscosity of the polyurethane pouring sealant is proper.
In some possible embodiments of the present invention, the castor oil comprises, by mass, 20-30% of the a material component, 2-4% of the first polyether polyol, 20-40% of the second polyether polyol, 0.1-1% of the wetting dispersant, 0.1-1% of the viscosity reducing agent, 0.1-1% of the antifoaming agent, and 30-57% of the aluminum hydroxide.
In some embodiments of the invention, the B-stock component is a polymeric MDI.
In some possible embodiments of the invention, the mass ratio of the wetting dispersant, the viscosity reducing agent and the defoamer is 1:1:1. So that the synergistic effect among the wetting dispersant, the viscosity reducer and the defoamer is exerted to the maximum, and the foam breaking capacity of the polyurethane pouring sealant is the strongest.
In some possible embodiments of the invention, the wetting dispersant is an anionic wetting dispersant and the viscosity reducer is a high molecular weight alkylammonium salt copolymer.
In some possible embodiments of the invention, the wetting dispersant is BYKW969, the viscosity reducer is BYK 9076, and the defoamer is F-705.
In some embodiments of the present invention, the manufacturer of said BYKW969 and said BYK 9076 is pick in germany; the manufacturer of F-705 is the Taier chemical industry.
In some embodiments of the invention, the polymeric MDI comprises an isocyanate and a diphenylmethane diisocyanate.
In some possible embodiments of the invention, the polymeric MDI has a viscosity of 150 to 250 mPas at 25 ℃. The mixing auxiliary agent has better defoaming effect on the polyurethane pouring sealant obtained by the polymeric MDI with the viscosity of 150-250 mPas at 25 ℃.
In some embodiments of the invention, the polymeric MDI is any one of polymeric MDI PAPI-27, polymeric MDI5005 and Desmodur-44V 20L.
In some embodiments of the invention, the manufacturer of the polymeric MDI PAPI-27 is Shanghai Xin Rui chemical Co., ltd; the manufacturer of the polymeric MDI5005 is henichi polyurethane (china) limited; the manufacturer of Desmodur-44V20L is a scientific source.
In some embodiments of the invention, the castor oil has a number average molecular weight of 900 to 1000 and an average functionality of 2.7.
In some possible embodiments of the invention, the first polyether polyol has a hydroxyl number of 440 to 460 and the first polyether polyol has a number average molecular weight of 350 to 400.
In some possible embodiments of the invention, the second polyether polyol has a functionality of 3 and the second polyether polyol has a number average molecular weight of 4000 to 5000.
In some possible embodiments of the invention, the first polyether polyol is polyether DV125 and the second polyether polyol is polyether EP-330NG.
In some embodiments of the invention, the manufacturers of the polyether DV125 and the polyether EP-330NG are Shandong Lanxingdong, inc.
In some embodiments of the present invention, the preparation method of the mixing auxiliary agent includes: and under the normal temperature condition, placing the wetting dispersant in a container, and sequentially adding the viscosity reducer and the defoamer into the container.
In some embodiments of the present invention, the preparation method of the a component includes: sequentially adding the castor oil, the first polyether polyol and the second polyether polyol into a mixer, mixing and stirring at a rotating speed of 2000r/min for 4min to obtain a first mixture, adding the mixing auxiliary agent and the aluminum hydroxide into the first mixture, and mixing and stirring at a rotating speed of 2000r/min for 4min by the mixer to obtain the material A component.
In some embodiments of the invention, the material A component and the material B component are mixed according to the mass ratio of (8-10): 1 to prepare the polyurethane pouring sealant.
Examples
Examples 1-5 and comparative examples of the present invention each provide a polyurethane potting adhesive, the specific compositions and contents of which are shown in table 1. Examples 1-5 differ from the comparative examples in that: the components in the polyurethane potting adhesives of examples 1 to 5 include a wetting dispersant and a viscosity reducing agent, the components in the polyurethane potting adhesive of the comparative example do not include a wetting dispersant and a viscosity reducing agent, the defoaming agent of the comparative example is three times that of the defoaming agent of example 3, and the remaining components are the same as those of example 3.
Table 1 the components and amounts of the polyurethane potting adhesives of examples 1 to 5
The preparation methods of examples 1 to 5 are as follows:
the preparation method of the component A comprises the following steps: and at normal temperature, sequentially adding the castor oil, the first polyether polyol and the second polyether polyol into a mixer, mixing and stirring at a rotating speed of 2000r/min for 4min to obtain a first mixture, adding the mixing auxiliary agent and the aluminum hydroxide into the first mixture, and mixing and stirring at a rotating speed of 2000r/min for 4min to obtain the material A component.
The model of the sample mixer is ZYMC-700VS.
And mixing the material A component and the material B component to prepare the polyurethane pouring sealant. The mass ratio of the A-component to the B-component in example 1 was 8:1, the mass ratio of the A-component to the B-component in example 2 was 9:1, the mass ratio of the A-component to the B-component in example 3 was 10:1, the mass ratio of the A-component to the B-component in example 4 was 9:1, the mass ratio of the A-component to the B-component in example 5 was 8:1, and the mass ratio of the A-component to the B-component in comparative example was 10:1.
Performance evaluation:
the shear strength of the polyurethane potting adhesives obtained in examples 1 to 5 and comparative example was tested, and the test results are shown in table 2.
Performance parameters of the polyurethane potting adhesive described in Table 2
| Project | Standard of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Shear strength/Mpa | GB/T7124-2 | 1.1 | 1.2 | 2.0 | 1.2 | 1.1 | 0.9 |
| Air bubble | / | Bubble-free | Bubble-free | Bubble-free | Bubble-free | Bubble-free | A small amount of bubbles |
As can be seen from table 2, the shear strength of the polyurethane potting adhesive appears to increase and then decrease with increasing content of the defoamer. By observing the surfaces of the polyurethane pouring sealants in examples 1 to 5 and the polyurethane pouring sealants in comparative examples, the polyurethane pouring sealants in examples 1 to 5 are substantially bubble-free, and even if an excessive amount of defoamer is added in the comparative examples, the polyurethane pouring sealants in the comparative examples still have a small amount of bubbles, and by observing the shear strengths of the polyurethane pouring sealants in examples 1 to 5 and the polyurethane pouring sealants in the comparative examples, the shear strength of the polyurethane pouring sealants can be greatly reduced by the excessive amount of defoamer. Therefore, the polyurethane pouring sealants in examples 1 to 5 have the shearing strength meeting the market requirements, and the air bubbles of the polyurethane pouring sealants in examples 1 to 5 are greatly reduced compared with the air bubbles of the polyurethane pouring sealants in comparative examples.
While embodiments of the present invention have been described in detail hereinabove, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. It is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (10)
1. The polyurethane pouring sealant is characterized by comprising a material A component and a material B component;
the material A comprises castor oil, first polyether polyol, second polyether polyol, a mixing auxiliary agent and aluminum hydroxide;
the material B component comprises polymeric MDI;
the mixing auxiliary agent is a mixture composed of a wetting dispersant, a viscosity reducer and an antifoaming agent.
2. The polyurethane potting adhesive according to claim 1, wherein the mass ratio of the A material component to the B material component is (10-8): 1.
3. The polyurethane potting adhesive according to claim 1, wherein the castor oil is 20 to 30% by mass of the material a, the first polyether polyol is 2 to 4% by mass, the second polyether polyol is 20 to 40% by mass, the wetting dispersant is 0.1 to 1% by mass, the viscosity reducing agent is 0.1 to 1% by mass, the antifoaming agent is 0.1 to 1% by mass, and the aluminum hydroxide is 30 to 57% by mass.
4. The polyurethane potting adhesive of claim 1, wherein the mass ratio of the wetting dispersant, the viscosity reducer and the defoamer is 1:1:1.
5. The polyurethane potting adhesive of claim 1, wherein the wetting dispersant is an anionic wetting dispersant and the viscosity reducer is a high molecular weight alkylammonium salt copolymer.
6. The polyurethane potting adhesive of claim 1, wherein the polymeric MDI comprises isocyanate and diphenylmethane diisocyanate.
7. The polyurethane potting adhesive of claim 1, wherein the polymeric MDI has a viscosity of 150 to 250 mPa-s at 25 ℃.
8. The polyurethane potting adhesive of claim 1, wherein the castor oil has a number average molecular weight of 900 to 1000 and an average functionality of 2.7.
9. The polyurethane potting adhesive of claim 1, wherein the first polyether polyol has a hydroxyl number of 440-460 and a number average molecular weight of 350-400.
10. The polyurethane potting adhesive of claim 1, wherein the functionality of the second polyether polyol is 3 and the number average molecular weight of the second polyether polyol is 4000 to 5000.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147832.0A CN116656306A (en) | 2022-02-17 | 2022-02-17 | Polyurethane pouring sealant |
| PCT/CN2022/113447 WO2023155400A1 (en) | 2022-02-17 | 2022-08-19 | Polyurethane potting adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147832.0A CN116656306A (en) | 2022-02-17 | 2022-02-17 | Polyurethane pouring sealant |
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| Publication Number | Publication Date |
|---|---|
| CN116656306A true CN116656306A (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210147832.0A Pending CN116656306A (en) | 2022-02-17 | 2022-02-17 | Polyurethane pouring sealant |
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| Country | Link |
|---|---|
| CN (1) | CN116656306A (en) |
| WO (1) | WO2023155400A1 (en) |
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| CN112175571A (en) * | 2020-09-30 | 2021-01-05 | 有行鲨鱼（上海）科技股份有限公司 | Polyurethane spray adhesive and preparation method thereof |
| CN113683997A (en) * | 2021-09-10 | 2021-11-23 | 浙江博菲电气股份有限公司 | Polyurethane pouring sealant for protecting rotor coating of wind driven generator and preparation method thereof |
| CN113717677A (en) * | 2021-08-24 | 2021-11-30 | 湖北南北车新材料有限公司 | Double-component polyurethane adhesive and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112175570B (en) * | 2020-09-30 | 2022-04-29 | 有行鲨鱼（上海）科技股份有限公司 | Polyurethane adhesive and preparation method thereof |
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2022
- 2022-02-17 CN CN202210147832.0A patent/CN116656306A/en active Pending
- 2022-08-19 WO PCT/CN2022/113447 patent/WO2023155400A1/en unknown
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| JPH09278864A (en) * | 1996-04-16 | 1997-10-28 | Dainippon Ink & Chem Inc | Two-package polyurethane resin composition and its production |
| JP2007284579A (en) * | 2006-04-18 | 2007-11-01 | Sanyo Chem Ind Ltd | Potting material for electric insulation |
| CN109468113A (en) * | 2017-09-08 | 2019-03-15 | 烟台德邦科技有限公司 | A kind of casting glue for wind-driven generator coating protection |
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| CN112175571A (en) * | 2020-09-30 | 2021-01-05 | 有行鲨鱼（上海）科技股份有限公司 | Polyurethane spray adhesive and preparation method thereof |
| CN113717677A (en) * | 2021-08-24 | 2021-11-30 | 湖北南北车新材料有限公司 | Double-component polyurethane adhesive and preparation method thereof |
| CN113683997A (en) * | 2021-09-10 | 2021-11-23 | 浙江博菲电气股份有限公司 | Polyurethane pouring sealant for protecting rotor coating of wind driven generator and preparation method thereof |
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| WO2023155400A1 (en) | 2023-08-24 |
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