CN115746691B - Water-blocking material for closing open pores of heat insulating material and application thereof - Google Patents
Water-blocking material for closing open pores of heat insulating material and application thereof Download PDFInfo
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- CN115746691B CN115746691B CN202211261793.3A CN202211261793A CN115746691B CN 115746691 B CN115746691 B CN 115746691B CN 202211261793 A CN202211261793 A CN 202211261793A CN 115746691 B CN115746691 B CN 115746691B
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 5
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 5
- 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 4
- 229920002121 Hydroxyl-terminated polybutadiene Polymers 0.000 claims description 4
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- 238000005507 spraying Methods 0.000 claims description 4
- 229920001451 polypropylene glycol Polymers 0.000 claims 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 claims description 2
- 239000011247 coating layer Substances 0.000 claims 1
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- 239000004205 dimethyl polysiloxane Substances 0.000 claims 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims 1
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
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- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
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Landscapes
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Abstract
The application relates to a water-blocking material for closing an opening of a heat insulating material and an application thereof, wherein the water-blocking material comprises a component A and a component B; wherein: the component A comprises the following components in parts by weight: 10-30 parts of polysiloxane, 5-15 parts of polyether polyol and 20-45 parts of isocyanate; the component B comprises the following components in parts by weight: 5-30 parts of polyolefin polyol, 5-25 parts of curing agent, 0.01-1 part of catalyst, 0.01-1 part of defoamer and 1-20 parts of filler. The water-blocking material has excellent low-temperature toughness, high-low temperature alternating adaptability and flame retardance, can be integrally formed on the surface of the heat-insulating material with the holes without using glue, and has no splice, so that the problems of moisture absorption, cold insulation capacity reduction and the like of the heat-insulating material caused by the fact that water vapor is sucked from the aluminum foil joints and the damaged parts are solved, the water-blocking coating has excellent toughness and elasticity, is not easy to damage, effectively ensures the service performance and service life of the heat-insulating material, and reduces the use cost.
Description
Technical Field
The application relates to the technical field of ship nonmetallic materials, in particular to a water-blocking material for closing openings of a heat insulating material.
Background
The ship refrigeratory (freezer, refrigerator) is used as food storage space, and plays a key role in guaranteeing the eating life of crews. The low temperature and cleaning are necessary conditions required by the refrigeration house, the adoption of heat insulation materials is an important means for guaranteeing the temperature of the refrigeration house, and repeated cleaning is an effective method for guaranteeing the cleaning of the refrigeration house. After the ship approaches the shore, the inner wall of the refrigeration house and the residual articles on the ground are repeatedly cleaned by water until the ship is completely cleaned.
At present, the heat insulation material of the ship refrigeration house is mainly foam or aerogel materials, and is mostly of an open-cell structure. The foam heat insulating material is mainly organic foam such as polyurethane, rubber and plastic, has low density and good heat insulation, but is easy to age, has poor fire resistance and generates gas harmful to people during combustion. The cold storage is in dry-wet and cold-hot alternating environment for a long time by the normal temperature cleaning on the shore and the low temperature work in sailing. Under the capillary action, the water vapor in the refrigeration house is easy to be adsorbed on the surface of the foam and enter the inside of the foam holes to freeze, so that the foam hole material forms a cold bridge, the heat insulation performance is reduced, and the heat insulation effect is seriously affected.
The heat insulating surface sealing water blocking material for ship refrigerator is one with specific material and technological process to treat the surface of the original heat insulating foam material to seal the surface of the foam and isolate water vapor from entering. The surface of the existing refrigeration house heat insulation material is generally subjected to barrier waterproof treatment by adopting a method of paving aluminum foil, and the following problems mainly exist: (1) The aluminum foil is only adhered to the heat insulation front surface and is not adhered to six sides of the heat insulation material by 100%, so that water vapor can easily enter through other interfaces; (2) The aluminum foil is stuck and fixed by adopting an adhesive, the polarity of the adhesive is larger, and the adhesive is easy to absorb water, thereby causing heat insulation and moisture absorption; (3) The aluminum foil is easy to damage and lose the waterproof effect in the process of installing the decorative plate. At present, the phenomenon of difficult cold drawing of the ship refrigeration house appears.
Disclosure of Invention
The application provides a water-blocking material for closing an opening of a heat-insulating material and application thereof, and aims to solve the problem that heat preservation and heat insulation performance of a ship refrigeration house heat-insulating material in the related art is reduced due to easiness in moisture absorption.
In a first aspect, the present application provides a water blocking material for closing an opening of a heat insulating material, comprising a component a and a component B; wherein:
the component A comprises the following components in parts by weight: 10-30 parts of polysiloxane, 5-15 parts of polyether polyol and 20-45 parts of isocyanate;
the component B comprises the following components in parts by weight: 5-30 parts of polyolefin polyol, 5-25 parts of curing agent, 0.01-1 part of catalyst, 0.01-1 part of defoamer and 1-20 parts of filler.
In some embodiments of the application, the component a comprises the following components by weight: 15-20 parts of polysiloxane, 5-10 parts of polyether polyol and 20-30 parts of isocyanate; the component B comprises the following components in parts by weight: 20-30 parts of polyolefin polyol, 10-20 parts of curing agent, 0.1-0.5 part of catalyst, 0.1-0.6 part of defoamer and 10-15 parts of filler.
In some embodiments of the application, the polysiloxane comprises at least one of a hydroxyl-terminated polysiloxane, an amine-terminated polysiloxane;
the polyether polyol comprises at least one of polyoxypropylene ether polyol and polytetrahydrofuran ether polyol;
the isocyanate comprises at least one of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate and carbodiimide modified diphenylmethane diisocyanate.
In some embodiments of the application, the polyolefin polyol comprises at least one of a hydroxyl-terminated polyisoprene, a hydroxyl-terminated polybutadiene;
the curing agent comprises at least one of dimethyl thiotoluene diamine and di-sec-butylamino diphenyl methane;
the catalyst comprises at least one of an organobismuth catalyst and an organotin catalyst;
the defoamer comprises at least one of BKYA530 and BYK 057;
the filler comprises at least one of montmorillonite, talcum powder and graphene oxide.
In a second aspect, the present application provides an insulating water-blocking structure comprising:
a heat insulating substrate made of foam or aerogel material formed on the inner surface of the refrigerating apparatus,
the water-blocking coating is coated on the surface of the heat-insulating substrate and is formed by solidifying the water-blocking material for closing the openings of the heat-insulating material.
In some embodiments of the application, the thickness of the water-blocking coating is greater than or equal to 2mm.
In some embodiments of the application, the water-blocking coating is prepared by: and (3) spraying the component A and the component B on the surface of the heat-insulating substrate in a crossing manner, and naturally standing.
In a third aspect, the present application provides a refrigeration apparatus having an inner wall surface provided with the above-described heat-insulating water-blocking structure.
In some embodiments of the application, the refrigeration device is a ship's freezer.
In a fourth aspect, the present application provides a ship, wherein the inner wall of a refrigerator is provided with the heat-insulating water-blocking structure.
The technical scheme provided by the application has the beneficial effects that: the water-blocking material for closing the openings of the heat-insulating material has excellent low-temperature toughness, high-low temperature alternating adaptability and flame retardance, has no seam after the surface of the heat-insulating material is integrally formed, solves the problems of reduced heat-insulating property, softened and embrittled material and the like caused by the fact that water vapor enters the inside of an opening structure of the heat-insulating material from the outside, effectively improves the heat-insulating effect and service life of the heat-insulating material, avoids energy waste, reduces repair procedures and reduces use cost.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described in the following in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides a water-blocking material for closing an opening of a heat insulating material, which comprises a component A and a component B; wherein: the component A comprises the following components in parts by weight: 10-30 parts of polysiloxane (weight average molecular weight 1000-2000), 5-15 parts of polyether polyol (weight average molecular weight 1000-2000) and 20-45 parts of isocyanate; the component B comprises the following components in parts by weight: 5-30 parts of polyolefin polyol (weight average molecular weight 1000-2000), 5-25 parts of curing agent, 0.01-1 part of catalyst, 0.01-1 part of defoamer and 1-20 parts of filler.
Further, the component A comprises the following components in parts by weight: 15-20 parts of polysiloxane, 5-10 parts of polyether polyol and 20-30 parts of isocyanate; the component B comprises the following components in parts by weight: 20-30 parts of polyolefin polyol, 10-20 parts of curing agent, 0.1-0.5 part of catalyst, 0.1-0.6 part of defoamer and 10-15 parts of filler.
The water-blocking material has excellent elasticity, can be integrally formed with the water-blocking material without damaging the heat-insulating material, does not need to be adhered by using an adhesive, and has no seam compared with the traditional coiled material covering material, thereby solving the problems of moisture absorption, heat insulation and heat preservation performance reduction and the like of the heat-insulating material caused by the fact that water vapor is sucked from the seam.
Compared with the common polyurethane resin, the water-blocking material has excellent low temperature resistance and can keep better elasticity at low temperature; and has better hydrophobicity and excellent long-term water resistance. In addition, the water-blocking material has good high-low temperature alternating resistance, flame retardance and water-blocking performance, can effectively prolong the service life of the heat-insulating material, avoid energy waste, reduce repair procedures and reduce the use cost.
The water-blocking material is matched with the filler, so that the high-strength physical and mechanical properties, excellent toughness and water vapor barrier property of the organosilicon modified polyurethane are provided, the long-term high-humidity environment waterproofness of the organosilicon modified polyurethane is improved, the matching performance with the heat insulation material is improved, and the requirements of the organosilicon modified polyurethane on the mechanical and water vapor barrier properties when the organosilicon modified polyurethane is applied to the surface of the heat insulation material are met.
In a second aspect, the present application provides an insulating water-blocking structure comprising: a heat insulating substrate made of foam or aerogel material formed on an inner surface of the refrigerating apparatus; the water-blocking coating is coated on the surface of the heat-insulating substrate and is formed by solidifying the water-blocking material for closing the openings of the heat-insulating material. The water-blocking material with excellent low-temperature toughness and high-low temperature alternating resistance is coated on the surface of the heat-insulating material with an open pore structure, so that the effects of closing open pores and blocking water can be achieved.
In some embodiments, the polysiloxane comprises at least one of a hydroxyl-terminated polysiloxane, an amine-terminated polysiloxane, the hydroxyl-terminated or amine-terminated polysiloxane being capable of chemically reacting with the polyurethane resin to modify the polyurethane;
the polyether polyol comprises at least one of polyoxypropylene ether polyol and polytetrahydrofuran ether polyol;
the isocyanate comprises at least one of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate and carbodiimide modified diphenylmethane diisocyanate.
In some embodiments, the polyolefin polyol includes at least one of hydroxyl-terminated polyisoprene, hydroxyl-terminated polybutadiene to ensure that the material has a certain low temperature strength and toughness, hydrophobicity, etc.
And/or the curing agent comprises at least one of dimethyl thiotoluene diamine and di-sec-butylamino-diphenyl methane;
and/or the catalyst comprises at least one of an organobismuth catalyst and an organotin catalyst;
and/or the defoamer comprises at least one of BKYA530, BYK 057;
and/or the filler comprises lamellar fillers such as montmorillonite, talcum powder, graphene oxide and the like so as to improve at least one of water resistance.
The preparation method of the water-blocking material comprises the following steps:
and (2) preparing a component A: placing polyether polyol and polysiloxane in a reaction kettle, mixing, heating, vacuum dehydrating, cooling, adding isocyanate into the reaction kettle, stirring, introducing nitrogen, heating, reacting for 2-4 hours, sampling, measuring the NCO end group content in the semi-prepolymer, and stopping reacting after the NCO content reaches 12-18%;
and (3) preparing a component B: the polyolefin polyol, the curing agent, the catalyst, the defoaming agent and the filler are added into a stirring device in proportion to be mixed, and then the mixture is ground by a sand mill.
The technical scheme of the application is further described below through examples and comparative examples. The heat insulating materials in the following examples and comparative examples are rigid polyurethane foam, which is commonly used for heat insulation in refrigerators, unless otherwise specified.
Example 1
This example provides a water blocking material for closing an opening of a heat insulating material, the raw materials of which are shown in table 1, the water blocking material being composed of a component a and a component B.
TABLE 1
The preparation method of the water blocking material in the embodiment comprises the following steps:
preparing a component A: adding PDMS2000 and PPG2000 into a reaction kettle, heating to 110 ℃, dehydrating for 2 hours under the conditions of vacuum degree of-0.09 MPa and stirring speed of 120rpm, cooling to 40 ℃, gradually adding diphenylmethane diisocyanate into the reaction kettle, starting stirring (stirring speed of 70 rpm), introducing nitrogen, heating to 70 ℃, reacting for 2 hours, sampling, measuring the content of-NCO end groups in the semi-prepolymer (a piperidine method), after reaching 15% of theoretical value, (stopping heating and cooling to stop the reaction, placing the product into an iron barrel, degassing, filling nitrogen and sealing for later use;
preparing a component B: drying montmorillonite in an oven for 4 hours at a drying temperature of 120 ℃, naturally cooling for standby, adding hydroxyl-terminated polybutadiene HTPB2000, dimethyl thiotoluene diamine E-300, a catalyst T-12, a defoamer BYK 057 and montmorillonite into a stirring tank according to a proportion, and pre-mixing for 30 minutes by a high-speed stirrer (stirring speed 1000 r/min); grinding for 2 hours in a sand mill, discharging, subpackaging in iron barrels, and hermetically storing;
the preparation method of the heat-insulating water-blocking structure in the embodiment comprises the following steps:
the component A and the component B are respectively put into corresponding charging barrels, the material is evenly coated on the surface of the heat insulation material by adopting a spraying process, the thickness is 2mm, and the coating rate is 2.5kg/m 2 Thus obtaining the heat-insulating water-blocking structure. Naturally placing after spraying, drying the surface of the material for 5min, and obtaining initial strength after 24 hours and final strength after 7 days. The heat insulating material in this embodiment is a conventional marine heat insulating material.
Comparative example 1
The water blocking material for closing the openings of the heat insulating material, the preparation method and the preparation method of the heat insulating water blocking structure provided in this comparative example, including most of the operation steps of example 1, only differ in that PDMS2000 is not present in the raw materials, and the raw materials are shown in table 2:
TABLE 2
Comparative example 2
The water blocking material for closing the openings of the heat insulating material, the preparation method and the preparation method of the heat insulating water blocking structure provided in this comparative example, including most of the operation steps of example 1, were different only in that PPG2000 was not contained in the raw materials, and the raw materials are shown in table 3:
TABLE 3 Table 3
Performance test:
the following performance tests were performed on the heat insulation structures prepared in example 1 and comparative examples 1 and 2:
hydrophobicity: with reference to GB/T10299-2011, the larger the numerical value is, the better the hydrophobic performance is;
tensile strength and elongation at break: with reference to GB/T1040.1-2018, the larger the value, the higher the strength and the higher the elongation;
cross-hatch adhesion: the higher the rating, the poorer the adhesion, tested with reference to GB/T9286-2021.
TABLE 4 Table 4
Because the heat insulating material is generally softer, the strength is low, and the water-blocking coating with high rigidity is easy to damage the heat insulating material, the coating with good flexibility can better meet the requirement of a heat insulating water-blocking structure, and the requirement on tensile strength is not too high, so long as the heat insulating material can adapt to low-temperature and high-low temperature alternating environments.
As can be seen from the test results of table 4, the water blocking material for closing the openings of the heat insulating material provided by the present application has excellent hydrophobicity, toughness and adhesion. As can be seen from the data of the examples and the comparative examples, the water blocking material for closing the openings of the heat insulating material has greatly improved hydrophobicity and obviously improved flexibility on the premise of meeting the basic mechanics and adhesive force, is more suitable for water prevention on the surface of the heat insulating material, can be used for preparing heat insulating water blocking structures on the surface of the inner wall of a refrigeration device, and is particularly suitable for closing water blocking of the heat insulating material on the inner wall of a refrigeration house.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A water-blocking material for closing an opening of a heat insulating material, characterized in that the water-blocking material is composed of a component a and a component B, wherein:
the component A consists of the following components in parts by weight: 200018 parts of hydroxyl-terminated polysiloxane PDMS, 2000 parts of polyether polyol PPG, 25 parts of diphenylmethane diisocyanate;
the component B consists of the following components in parts by weight: hydroxyl-terminated polybutadiene HTPB2000 21 parts, dimethyl thiotoluene diamine E-300 parts, dibutyl tin dilaurate T-12.2 parts, a defoamer BYK 057.5 parts and 1250 mesh montmorillonite 13 parts.
2. A thermally insulating water-blocking structure, characterized by: comprising the following steps:
a heat insulating substrate made of foam or aerogel material formed on the inner surface of the refrigerating apparatus,
a water-blocking coating layer, which is coated on the surface of the heat-insulating substrate and is formed by curing the water-blocking material for closing the openings of the heat-insulating material according to claim 1.
3. The thermally insulating water-blocking structure of claim 2, wherein: the thickness of the water-blocking coating is more than or equal to 2mm.
4. The thermally insulating water-blocking structure of claim 2, wherein: the preparation method of the water-blocking coating comprises the following steps: and (3) spraying the component A and the component B on the surface of the heat-insulating substrate in a crossing manner, and naturally standing.
5. A refrigeration device, characterized by: an inner wall surface of the refrigerating device is provided with the heat-insulating water-blocking structure as claimed in any one of claims 2 to 4.
6. The refrigeration unit as set forth in claim 5 wherein: the refrigerating device is a ship refrigeration house.
7. A ship, characterized in that: the heat-insulating water-blocking structure of any one of claims 2 to 4 is arranged on the inner wall of the refrigerator.
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| CN202211261793.3A CN115746691B (en) | 2022-10-14 | 2022-10-14 | Water-blocking material for closing open pores of heat insulating material and application thereof |
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| CN115746691B true CN115746691B (en) | 2023-11-17 |
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| CN111675958A (en) * | 2020-07-08 | 2020-09-18 | 王振海 | Protective coating material for ships, naval vessels and offshore drilling platforms and preparation method |
| CN113105820A (en) * | 2020-01-13 | 2021-07-13 | 宁波朗茵新材料有限公司 | Formula and preparation process of anti-condensation spray |
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| CN109575667A (en) * | 2017-09-28 | 2019-04-05 | 祝凤娟 | A kind of thin layer heat-barrier material |
| CN107903803A (en) * | 2017-11-27 | 2018-04-13 | 烟台市顺达聚氨酯有限责任公司 | A kind of freezer high water vapor rejection polyurethane coating and preparation method thereof |
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| CN109912837A (en) * | 2019-03-18 | 2019-06-21 | 华南理工大学 | A kind of hydrophobicity graphene aerogel coating flame retarded rigid polyurethane foams and preparation method thereof |
| CN110483833A (en) * | 2019-08-28 | 2019-11-22 | 北京化工大学 | A kind of preparation method of surface coating flame retarded rigid polyurethane foams plastics |
| CN113105820A (en) * | 2020-01-13 | 2021-07-13 | 宁波朗茵新材料有限公司 | Formula and preparation process of anti-condensation spray |
| CN111675958A (en) * | 2020-07-08 | 2020-09-18 | 王振海 | Protective coating material for ships, naval vessels and offshore drilling platforms and preparation method |
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