High-temperature-resistant thermal insulation layer and manufacturing method

Abstract

The invention discloses a high-temperature-resistant thermal insulation layer and a manufacturing method, and relates to the technical field of thermal insulation materials, the high-temperature-resistant thermal insulation layer comprises a vacuum thermal insulation layer and a protective layer surrounding the vacuum thermal insulation layer; the vacuum heat insulation layer is prepared from the following components in parts by weight: 100-200 parts of a melt-blown reticular supporting layer, 20-40 parts of porous ceramic particles and 10-30 parts of calcium hydroxide porous particles. The protective layer is prepared from the following components in parts by weight: 60 to 70 parts of polyurethane resin prepolymer, 5 to 10 parts of cross-linking agent, 10 to 20 parts of heat insulation filler and 0.05 to 1 part of catalyst. Compared with a traditional heat preservation layer, the high-temperature-resistant heat preservation layer prepared through the method has the better heat preservation and heat insulation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation materials, and in particular to a high temperature resistant thermal insulation layer and a manufacturing method thereof. Background Art

[0002] Insulation and heat insulation of building walls is one of the important measures to implement building energy conservation. In order to meet the requirement of 65% building energy conservation, the role of building wall insulation materials in building energy conservation is becoming increasingly obvious.

[0003] At present, the traditional materials used for building insulation are mainly thermosetting rigid polyurethane insulation materials (PU) and phenolic foam insulation materials (PF). However, it is difficult to adjust the thermal conductivity of both to a lower level through a single material component. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a high temperature resistant thermal insulation layer and a manufacturing method thereof.

[0005] The above object of the present invention is achieved through the following technical solutions: A high temperature resistant heat preservation layer, comprising a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 100-200 parts of melt-blown mesh support layer; 20-40 parts of porous ceramic particles; 10-30 parts of porous calcium hydroxide particles; The protective layer is prepared by comprising the following components in parts by weight: 60-70 parts of polyurethane resin prepolymer; 5-10 parts of cross-linking agent; 10-20 parts of thermal insulation filler; Catalyst 0.05~1 part.

[0006] The present invention provides a material capable of maintaining excellent thermal insulation performance in a high temperature environment, and achieves a highly efficient thermal insulation effect through the coordinated use of a vacuum thermal insulation layer and a protective layer.

[0007] The core of the insulation layer is the vacuum insulation layer, which uses a combination of a melt-blown mesh support layer, porous ceramic particles, and porous calcium hydroxide particles to achieve efficient thermal isolation. The melt-blown mesh support layer not only provides a skeleton structure for the entire insulation layer, but also enhances the mechanical strength through its unique mesh fiber structure. Secondly, the melt-blown mesh support layer also provides filling space for porous ceramic particles and porous calcium hydroxide particles, and through the mutual cooperation of the mesh structure and the porous structure, the vacuum insulation layer as a whole forms a structure with uniform and dense pores and good stability.

[0008] Porous ceramic particles and porous calcium hydroxide particles play an important role in the vacuum insulation layer. Ceramic particles can withstand extremely high temperatures without decomposition or deformation due to their excellent heat resistance. At the same time, their porous design provides good insulation effect and can effectively reduce heat conduction. Secondly, as another filler material, porous calcium hydroxide particles can greatly reduce the air inside the vacuum insulation layer by absorbing carbon dioxide inside the vacuum insulation layer; and by pre-treating the vacuum insulation layer with a carbon dioxide atmosphere and then combining it with a protective layer, the vacuum insulation layer can slowly reach a vacuum state after forming the insulation layer, thereby greatly improving the insulation effect. The two particles are evenly distributed and filled in the mesh support layer, so that multiple thermal resistance barriers are formed inside the vacuum insulation layer. This multi-level structure greatly improves the insulation performance.

[0009] The protective layer is composed of polyurethane resin prepolymer, cross-linking agent, thermal insulation filler, catalyst and antioxidant, etc. As the main material of the protective layer, polyurethane resin prepolymer has excellent toughness and durability, and forms a strong network structure through reaction with the cross-linking agent, which enhances the mechanical strength and environmental tolerance of the thermal insulation layer.

[0010] Furthermore, the thermal insulation filler is selected from one or more of silica aerogel, potassium hexatitanate whisker, aluminum silicate fiber, and ultrafine hollow microspheres.

[0011] Furthermore, the thermal insulation filler is potassium hexatitanate whiskers.

[0012] Furthermore, the average pore size of the porous ceramic particles is 100-200 μm.

[0013] Furthermore, the D50 particle size of the porous ceramic particles is 2 to 4 mm; the D50 particle size of the porous calcium hydroxide particles is 2 to 5 mm; the average pore size of the mesh support layer is 1 mm to 5 mm; and the fiber diameter of the mesh support layer is 0.5 to 2 mm.

[0014] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: preparing a substrate vacuum insulation layer; S2: Stir and mix the components for preparing the protective layer evenly, and then apply them on each surface of the vacuum insulation layer of the substrate, put them into a sealed container, pressurize them, and then heat and cure them.

[0015] Furthermore, the step S1 specifically includes the following steps: The porous ceramic particles and the porous calcium hydroxide particles are circulated through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the porous calcium hydroxide particles and the mesh support layer meet the following conditions: 100-200 parts of the mesh support layer, 20-40 parts of the porous ceramic particles, and 10-30 parts of the porous calcium hydroxide particles.

[0016] Furthermore, the pressure in the sealed container is controlled to be 2 to 3 atmospheres.

[0017] Furthermore, the pressurization time is 10 to 30 minutes.

[0018] Furthermore, the coating thickness of the protective layer in step S2 is 2 to 5 cm.

[0019] The preparation process of the present invention also helps to improve the performance of the material. During the preparation of the vacuum insulation layer, the porous ceramic particles and the porous calcium hydroxide particles are circulated through the melt-blown mesh support layer respectively to ensure the uniform distribution and tight filling of the particles, forming an insulation layer with high thermal resistance. Subsequently, the outer surface of the vacuum insulation layer is coated with polyurethane resin and pressurized, heated and cured in a closed container. This pressurized curing process not only improves the coating quality of the polyurethane resin, but also further improves the overall sealing of the material, ensuring that the insulation layer can maintain stable insulation performance for a long time in a high temperature environment. In particular, during the pressurization process, the pressure in the closed container is controlled at 2 to 3 atmospheres, and the pressurization time is 10 to 30 minutes, which ensures that the polyurethane resin evenly penetrates a certain depth on the surface of the vacuum insulation layer and is completely cured, thereby further improving the density and durability of the entire material.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a material with excellent thermal insulation performance in a high temperature environment, the core of which is a combination of a vacuum insulation layer and a protective layer to achieve efficient thermal insulation. The vacuum insulation layer adopts a combination of a melt-blown mesh support layer, porous ceramic particles and porous calcium hydroxide particles. The melt-blown mesh support layer provides a skeleton for the thermal insulation layer, enhances the mechanical strength, and provides a filling space for the particles to form a uniform and dense pore structure. The porous ceramic particles effectively reduce heat conduction due to their excellent heat resistance and porosity design; the porous calcium hydroxide particles reduce internal air by absorbing carbon dioxide, thereby improving the thermal insulation effect.

[0021] The protective layer is composed of polyurethane resin prepolymer, cross-linking agent, thermal insulation filler, catalyst and antioxidant, which enhances the mechanical strength and durability of the insulation layer. During the preparation process, the particles are evenly distributed and tightly filled through the melt-blown mesh support layer to form a high heat resistance insulation layer. After that, the surface of the vacuum insulation layer is coated with polyurethane resin and cured under pressurized conditions of 2 to 3 atmospheres and 10 to 30 minutes to ensure uniform penetration and complete curing, thereby improving the density and durability of the material, so that it can maintain stable thermal insulation performance for a long time in a high temperature environment. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with embodiments.

[0023] Embodiment 1: A high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 100 parts of meltblown mesh support layer; 20 parts of porous ceramic particles; 10 parts of calcium hydroxide porous particles.

[0024] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore diameter of the mesh support layer is 5 mm; the fiber diameter of the mesh support layer is 2 mm.

[0025] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 200 μm, and the D50 particle size of the porous ceramic particles is 4 mm.

[0026] The D50 particle size of the porous calcium hydroxide particles is 4 mm; The protective layer is prepared by comprising the following components in parts by weight: 60 parts of polyurethane resin prepolymer; 5 parts of cross-linking agent; 10 parts of thermal insulation filler; 0.05 parts of catalyst.

[0027] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0028] The crosslinking agent is trimethylolpropane.

[0029] The thermal insulation filler is potassium hexatitanate whisker.

[0030] The catalyst is dibutyltin dilaurate.

[0031] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the porous calcium hydroxide particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the porous calcium hydroxide particles and the mesh support layer meet the following conditions: 100 parts of the mesh support layer, 20 parts of the porous ceramic particles, and 10 parts of the porous calcium hydroxide particles.

[0032] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0033] Embodiment 2: A high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 200 parts of meltblown mesh support layer; 40 parts of porous ceramic particles; 30 parts of calcium hydroxide porous particles.

[0034] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore diameter of the mesh support layer is 5 mm; the fiber diameter of the mesh support layer is 2 mm.

[0035] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 200 μm, and the D50 particle size of the porous ceramic particles is 4 mm.

[0036] The D50 particle size of the porous calcium hydroxide particles is 4 mm; The protective layer is prepared by comprising the following components in parts by weight: 70 parts of polyurethane resin prepolymer; 10 parts of cross-linking agent; 20 parts of thermal insulation filler; 1 part of catalyst.

[0037] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0038] The crosslinking agent is trimethylolpropane.

[0039] The heat-insulating filler is selected from one or more of silica aerogel, potassium hexatitanate whisker, aluminum silicate fiber and ultrafine hollow microsphere.

[0040] The catalyst is dibutyltin dilaurate.

[0041] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the porous calcium hydroxide particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the porous calcium hydroxide particles and the mesh support layer meet the following conditions: 200 parts of the mesh support layer, 40 parts of the porous ceramic particles, and 30 parts of the porous calcium hydroxide particles.

[0042] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0043] Embodiment 3, this embodiment discloses a high temperature resistant heat preservation layer, comprising a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0044] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore diameter of the mesh support layer is 5 mm; the fiber diameter of the mesh support layer is 2 mm.

[0045] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 200 μm, and the D50 particle size of the porous ceramic particles is 4 mm.

[0046] The D50 particle size of the porous calcium hydroxide particles is 4 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0047] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0048] The crosslinking agent is trimethylolpropane.

[0049] The thermal insulation filler is potassium hexatitanate whisker.

[0050] The catalyst is dibutyltin dilaurate.

[0051] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0052] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0053] Embodiment 4: A high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0054] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0055] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0056] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0057] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0058] The crosslinking agent is trimethylolpropane.

[0059] The thermal insulation filler is potassium hexatitanate whisker.

[0060] The catalyst is dibutyltin dilaurate.

[0061] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0062] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0063] Embodiment 5, a high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0064] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0065] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0066] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0067] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0068] The crosslinking agent is trimethylolpropane.

[0069] The thermal insulation filler is potassium hexatitanate whisker.

[0070] The catalyst is dibutyltin dilaurate.

[0071] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0072] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm, then put them into a sealed container for pressurization and heat curing. The pressure in the sealed container is controlled to 3 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0073] Embodiment 6: A high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0074] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0075] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0076] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0077] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0078] The crosslinking agent is trimethylolpropane.

[0079] The thermal insulation filler is potassium hexatitanate whisker.

[0080] The catalyst is dibutyltin dilaurate.

[0081] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0082] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 3 cm, then put them into a sealed container for pressurization and heat curing. The pressure in the sealed container is controlled to 1.5 atmospheres, the pressurization time is 30 minutes, the heating temperature is 80°C, and the heating curing is 3 hours.

[0083] Embodiment 7, this embodiment discloses a high temperature resistant heat preservation layer, comprising a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0084] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0085] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0086] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0087] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0088] The crosslinking agent is trimethylolpropane.

[0089] The thermal insulation filler is silica aerogel.

[0090] The catalyst is dibutyltin dilaurate.

[0091] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0092] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0093] Embodiment 8: A high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0094] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0095] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0096] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0097] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0098] The crosslinking agent is trimethylolpropane.

[0099] The thermal insulation filler is aluminum silicate fiber.

[0100] The catalyst is dibutyltin dilaurate.

[0101] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0102] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0103] Embodiment 9, a high temperature resistant heat preservation layer disclosed in this embodiment comprises a vacuum heat insulation layer and a protective layer surrounding the vacuum heat insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 150 parts of meltblown mesh support layer; 30 parts of porous ceramic particles; 20 parts of calcium hydroxide porous particles.

[0104] The melt-blown mesh support layer is a melt-blown polyethylene mesh support layer, and the average pore size of the mesh support layer is 1 mm; the fiber diameter of the mesh support layer is 0.5 mm.

[0105] The porous ceramic particles are porous SiC ceramic particles, the average pore size of the porous ceramic particles is 100 μm, and the D50 particle size of the porous ceramic particles is 2 mm.

[0106] The D50 particle size of the porous calcium hydroxide particles is 2 mm; The protective layer is prepared by comprising the following components in parts by weight: 65 parts of polyurethane resin prepolymer; 7 parts of cross-linking agent; 15 parts of thermal insulation filler; 0.5 parts of catalyst.

[0107] The polyurethane resin prepolymer is K1235 polyurethane resin prepolymer produced by Jiangsu Qianmeite Polyurethane New Materials Co., Ltd.

[0108] The crosslinking agent is trimethylolpropane.

[0109] The heat-insulating filler is ultra-fine hollow microspheres.

[0110] The catalyst is dibutyltin dilaurate.

[0111] A method for preparing a high temperature resistant thermal insulation layer comprises the following steps: S1: Prepare a base vacuum insulation layer; circulate the porous ceramic particles and the calcium hydroxide porous particles through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the calcium hydroxide porous particles and the mesh support layer meet the following conditions: 150 parts of the mesh support layer, 30 parts of the porous ceramic particles, and 20 parts of the calcium hydroxide porous particles.

[0112] S2: Stir and mix the components of the protective layer and apply them on each surface of the vacuum insulation layer of the substrate to a coating thickness of 5 cm. Then put them into a sealed container and pressurize them, and then heat and cure them. The pressure in the sealed container is controlled to 2 atmospheres, and the pressurization time is 10 minutes. The heating temperature is 80°C and the heating curing is 3 hours.

[0113] The difference between Comparative Example 1 and Example 1 is that porous calcium hydroxide particles are not added to the vacuum insulation layer.

[0114] The difference between Comparative Example 2 and Example 1 is that no porous ceramic particles are added to the vacuum insulation layer.

[0115] The difference between Comparative Example 3 and Example 1 is that porous ceramic particles and porous calcium hydroxide particles are not added to the vacuum insulation layer.

[0116] Comparative Example 4 is a polyurethane thermal insulation board of Hongbaoli.

[0117] Detection method: The high temperature resistant insulation layers of Examples 1 to 9 and Comparative Examples 1 to 3 were made into a cubic container and covered with a 2 cm thick black iron plate. The container was placed in the sun at noon for 3 hours, and the temperature inside the cubic container was recorded with a thermometer, and the highest temperature was recorded.

[0118]

[0119] It can be seen from the above test results that the high temperature resistant thermal insulation layer prepared by the present invention has good thermal insulation effect.

[0120] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A high temperature resistant thermal insulation layer, characterized in that: comprising a vacuum insulation layer and a protective layer surrounding the vacuum insulation layer; The vacuum insulation layer is prepared by comprising the following components in parts by weight: 100-200 parts of melt-blown mesh support layer; 20-40 parts of porous ceramic particles; 10-30 parts of porous calcium hydroxide particles; The protective layer is prepared by comprising the following components in parts by weight: 60-70 parts of polyurethane resin prepolymer; 5-10 parts of cross-linking agent; 10-20 parts of thermal insulation filler; Catalyst 0.05~1 part.

2. A high temperature resistant thermal insulation layer according to claim 1, characterized in that: The heat-insulating filler is selected from one or more of silica aerogel, potassium hexatitanate whisker, aluminum silicate fiber, and ultrafine hollow microspheres.

3. A high temperature resistant thermal insulation layer according to claim 2, characterized in that: The heat-insulating filler is potassium hexatitanate whisker.

4. The high temperature resistant insulation layer according to claim 1, characterized in that: The average pore size of the porous ceramic particles is 100-200 μm.

5. The high temperature resistant thermal insulation layer according to claim 1, characterized in that: The D50 particle size of the porous ceramic particles is 2 to 4 mm; the D50 particle size of the porous calcium hydroxide particles is 2 to 5 mm; the average pore size of the mesh support layer is 1 mm to 5 mm; and the fiber diameter of the mesh support layer is 0.5 to 2 mm.

6. A method for preparing a high temperature resistant thermal insulation layer according to claims 1-5, characterized in that: The following steps are involved: S1: preparing a substrate vacuum insulation layer; S2: Stir and mix the components for preparing the protective layer evenly, and then apply them on each surface of the vacuum insulation layer of the substrate, put them into a sealed container, pressurize them, and then heat and cure them.

7. The method for preparing a high temperature resistant thermal insulation layer according to claim 6, characterized in that: The S1 step specifically includes the following steps: The porous ceramic particles and the porous calcium hydroxide particles are circulated through the mesh support layer respectively until the weight proportions of the porous ceramic particles, the porous calcium hydroxide particles and the mesh support layer meet the following conditions: 100-200 parts of the mesh support layer, 20-40 parts of the porous ceramic particles, and 10-30 parts of the porous calcium hydroxide particles.

8. The method for preparing a high temperature resistant thermal insulation layer according to claim 6, characterized in that: The pressure in the sealed container is controlled to be 2 to 3 atmospheres.

9. The method for preparing a high temperature resistant thermal insulation layer according to claim 6, characterized in that: The pressurization time is 10 to 30 minutes.

10. The method for preparing a high temperature resistant thermal insulation layer according to claim 6, characterized in that: The coating thickness of the protective layer in the step S2 is 2 to 5 cm.

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