Polyurethane energy-saving door and window profile and preparation method thereof

Abstract

The application relates to the polyurethane field and particularly discloses a polyurethane energy-saving door and window profile and a preparation method thereof. The door and window profile comprises, from inside to outside, a polyurethane heat preservation layer, a steel lining layer and a polyurethane fireproof layer; the polyurethane fireproof layer is formed by curing a polyurethane fireproof prepreg; the polyurethane fireproof prepreg comprises polyurethane fireproof resin and glass fibers in a weight ratio of 2:5; the polyurethane fireproof resin comprises the following raw materials in parts by weight: 16-30 parts of polyurethane resin; 6-9 parts of a flame retardant; 0.6-1 part of a compatibilizer; 0.6-0.8 part of a dispersing agent BYK-163; 3-5 parts of nano silicon dioxide; 3-5 parts of calcined kaolin; and 2-5 parts of tetrapod-shaped zinc oxide whiskers; and the preparation method comprises the following steps: preparing the polyurethane fireproof prepreg; preparing the steel lining layer and the polyurethane fireproof layer; and preparing the polyurethane heat preservation layer. The door and window profile has the advantages of excellent heat preservation performance and fire resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of polyurethane, more particularly, it relates to a polyurethane energy-saving door and window profile and a preparation method thereof. BACKGROUND

[0002] In recent years, the height of buildings is increasing, and the requirements for fire prevention of high-rise buildings are also increasing. Because of the rolling effect of fire, it develops rapidly in the vertical direction, and high-rise buildings have high requirements for rescue equipment and personnel. At the same time, due to the need for building energy saving, the widely used external wall insulation system also brings great fire safety hazards to the building. Once the external wall insulation material is ignited, it will cause devastating damage to the building envelope, including building doors and windows, and further affect the safety of the building interior by the aid of the smoke combustion effect in the narrow cavity attached to it. Therefore, "fire-resistant windows" have emerged.

[0003] The fire-resistant window is composed of a window frame, glass, sealing material and hardware. To achieve fire resistance, the components need to be coordinated and matched with each other. Among them, the window frame profile and fire-resistant glass are the key parts for the fire-resistant window to achieve fire resistance. The broken bridge aluminum profile has good air tightness and can effectively improve the thermal insulation performance, but it cannot resist high temperature well, so it can only meet the daily use requirements. Once a fire occurs, the overall frame structure will be damaged due to high temperature, the sealing structure will fail, and the reliability in dealing with fire conditions cannot be guaranteed. SUMMARY

[0004] In order to improve the thermal insulation and fire resistance of the door and window profile, the present application provides a polyurethane energy-saving door and window profile and a preparation method thereof.

[0005] In the first aspect, the present application provides a polyurethane energy-saving door and window profile, which adopts the following technical scheme:

[0006] A polyurethane energy-saving door and window profile, which comprises, from inside to outside, a polyurethane thermal insulation layer, a steel lining layer and a polyurethane fire-resistant layer;

[0007] The polyurethane fire-resistant layer is cured from a polyurethane fire-resistant prepreg, and the polyurethane fire-resistant prepreg comprises a polyurethane fire-resistant resin and glass fibers, and the weight ratio of the polyurethane fire-resistant resin to the glass fibers is 2:5;

[0008] The polyurethane fire-resistant resin comprises the following raw materials by weight:

[0009] Polyurethane resin 16-30 parts;

[0010] Flame retardant 6-9 parts;

[0011] Compatibilizer 0.6-1 part;

[0012] Dispersant BYK-163 0.6-0.8 parts;

[0013] Nano-silica 3-5 parts;

[0014] Calcined kaolin 3-5 parts;

[0015] Four acicular zinc oxide whiskers 2-5 parts.

[0016] By adopting the above technical scheme, since the polyurethane heat preservation layer, the steel lining layer and the polyurethane fireproof layer are combined, the profile can have multiple protections in fire resistance, heat preservation and strength retention, which greatly improves the heat preservation and fire resistance performance of the door and window profile. Among them, the polyurethane fireproof layer is formed by curing the polyurethane fireproof prepreg, and the polyurethane prepreg includes polyurethane fireproof resin and glass fiber. In the polyurethane fireproof resin, the polyurethane resin serves as the base material, the flame retardant can provide basic fire resistance, the compatibilizer can enhance the compatibility between the raw materials, the dispersant BYK-163 improves the uniformity of the mixture of the raw materials, and nano-silica, calcined kaolin and four acicular zinc oxide whiskers are additionally used. The silicon-oxygen tetrahedron of the nano-silica can form an infinite three-dimensional network through covalent bonds at high temperatures, the calcined kaolin loses part of the crystal water and becomes harder and has excellent chemical inertness compared to natural kaolin, which can be filled in the three-dimensional network, making the entire polyurethane fireproof resin structure more compact, and the four acicular zinc oxide whiskers have a unique needle-like structure, one end of which is connected to the three-dimensional network, and the other end can be well combined with the glass fiber, making the glass fiber and the polyurethane fireproof resin more closely combined. The glass fiber has good flame retardance and heat resistance, and when combined with the polyurethane fireproof resin, it serves as the first layer in contact with fire. The polyurethane fireproof resin can form a carbonized layer when exposed to fire, preventing the flame from penetrating further, and the glass fiber forms a fireproof barrier in the polyurethane fireproof resin, which can prolong the life of the carbonized layer, slow down the burning, and also enhance the strength of the entire polyurethane fireproof layer, reducing the decrease in air tightness caused by the destruction of the polyurethane fireproof layer, thereby maintaining the heat preservation performance of the door and window profile. Therefore, the heat preservation and fire resistance performance of the door and window profile is improved.

[0017] Optionally, the flame retardant includes magnesium dihydrogen phosphate and aluminum hydroxide in a weight ratio of 1:2.5.

[0018] Optionally, the compatibilizer includes 3-aminopropyl triethoxysilane and 3-(2-aminoethylamino) propyl trimethoxysilane in a weight ratio of 1:2.

[0019] Optionally, the steel lining layer includes a steel lining and an adhesion promoter coated on the surface of the steel lining, and the coating thickness is 2mm.

[0020] Optionally, the adhesion promoter includes the following raw materials in parts by weight:

[0021] Aluminum dihydrogen phosphate 50-60 parts;

[0022] Borosilicate glass microbeads 4-6 parts;

[0023] Self-repairing microcapsules 5-8 parts;

[0024] Polyvinyl alcohol 3-8 parts;

[0025] Sorbitol 3-5 parts;

[0026] Citric acid 1-2 parts;

[0027] Water 150-160 parts.

[0028] By adopting the technical scheme, the aluminum dihydrogen phosphate is used as the base bonding material, has excellent high-temperature resistance, and the combination of the polyvinyl alcohol, the sorbitol and the citric acid can improve the hardening temperature of the adhesive, which is beneficial to improving the bonding strength of the polyurethane fire-resistant layer and the steel lining at high temperature; the borosilicate glass microbeads are added, can be fused and sealed with the steel lining at high temperature, further improving the bonding strength of the steel lining and the polyurethane fire-resistant layer, and the self-repairing microcapsules can be broken to release the repairing agent in the interior when encountering fire, helping to seal the cracks of the door and window profiles and preventing the flame from spreading.

[0029] Optionally, the preparation method of the self-repairing microcapsules is as follows:

[0030] (1) Preparation of core microcapsules containing phase change material: 2 parts by weight of octadecane and 0.05 parts by weight of carbon nanotubes are added to 10 parts by volume of surfactant Span 80, stirred at 4000 rpm for 10 min to form a stable water-in-oil emulsion; 10 parts by volume of an aqueous solution containing 5 wt.% polyvinyl alcohol is added to the water-in-oil emulsion, stirred for 30 min, and then the reaction system is transferred to a 60℃ water bath for heating for 2 h, and a polymer film is gradually formed on the surface of the droplets in the emulsion, forming core microcapsules containing phase change material, which are collected by centrifugation at 3000 rpm for 10 min and washed with deionized water three times;

[0031] (2) Construction of silica shell: 5 parts by volume of TEOS, 0.5 parts by volume of ammonia water and 0.1 parts by weight of CTAB are sequentially added to 10 parts by volume of deionized water and stirred uniformly; the pH value is adjusted to 9.5; the core microcapsules are suspended in the above solution, and the reaction is carried out continuously under stirring and at a temperature of 30℃ for 4 hours, and a uniform and dense silica shell layer is gradually deposited on the outside of the core microcapsules; after the reaction is completed, the double-layer microcapsules with the silica shell are collected by centrifugation at 3000 rpm for 10 min, and washed with deionized water three times to remove residual substances;

[0032] (3) Filling with silicone resin repair agent: Place the double-layer microcapsules in a vacuum drying oven and evacuate to -0.1MPa to remove internal air; add a mixture of 3 parts by weight of premixed PDMS base resin and 0.5 parts by weight of MTES crosslinking agent to allow the liquid to fully penetrate into each double-layer microcapsule; continue to maintain the vacuum state for 1 hour until all microcapsules are effectively filled; add 1 drop of platinum catalyst and shake gently to ensure uniform distribution; then continue to evacuate for 15 minutes, remove excess liquid, and then perform preliminary curing treatment on the microcapsules loaded with silicone resin at 60°C for 4 hours to allow the silicone resin to crosslink but not completely cure; clean and dry the microcapsules after preliminary curing to obtain self-healing microcapsules.

[0033] By adopting the above technical solution, when a fire occurs or the temperature rises abnormally, the microcapsule will rupture due to the temperature rise, releasing organosilicon resin to quickly seal the cracks, and the temperature environment will be regulated by the phase change material, thereby effectively preventing the spread of flames and protecting the underlying structure of door and window profiles from further damage.

[0034] Optionally, the preparation method of the tackifier is as follows:

[0035] Aluminum dihydrogen phosphate, borosilicate glass microspheres, self-healing microcapsules, and water were mixed and stirred at 500 rpm for 15 minutes at 95°C to obtain a mixture. Polyvinyl alcohol, sorbitol, and citric acid were added to the mixture and stirred until homogeneous to obtain a thickener.

[0036] Secondly, this application provides a method for preparing polyurethane energy-saving door and window profiles, using the following technical solution:

[0037] A method for preparing a polyurethane energy-saving door and window profile includes the following steps:

[0038] (1) Prepare polyurethane refractory resin, impregnate refractory fibers into polyurethane refractory resin to obtain polyurethane refractory prepreg;

[0039] (2) The steel lining is preheated at a temperature of 130-150°C. Then, an adhesive is applied to the surface of the steel lining to form a steel lining layer. The steel lining coated with adhesive and the polyurethane refractory prepreg are then extruded through a co-extrusion die to allow the polyurethane refractory prepreg to adhere to the outer surface of the steel lining. The material is then cured and shaped. The co-extrusion temperature is 155-165°C, the curing temperature is 175-185°C, and the curing time is 15-30 minutes to form a prefabricated profile with an internal steel lining, including a steel lining layer and a polyurethane refractory layer.

[0040] (3) Inject polyurethane foam into the inner wall of the prefabricated profile to form a polyurethane insulation layer on the inner wall of the prefabricated profile, and obtain the door and window profile.

[0041] By adopting the technical scheme, the door and window profile prepared has excellent heat preservation and fire resistance.

[0042] In summary, the present application has the following beneficial effects:

[0043] 1. Since the present application adopts the combination of the polyurethane heat preservation layer, the steel lining layer and the polyurethane fire resistance layer, the profile can have multiple protections in fire resistance, heat preservation and strength maintenance, thereby greatly improving the heat preservation and fire resistance of the door and window profile.

[0044] 2. In the present application, the borosilicate glass microbeads and the self-repairing microcapsules are preferably added to the tackifier, the borosilicate glass microbeads can be fused and sealed with the steel lining at high temperature, thereby further improving the bonding strength between the steel lining and the polyurethane fire resistance layer, and the self-repairing microcapsules can be broken to release the internal repair agent when encountering fire, thereby helping to seal the cracks of the door and window and preventing the spread of fire.

[0045] 3. The method of the present application, the door and window profile prepared has excellent heat preservation and fire resistance. DETAILED DESCRIPTION

[0046] The present application will be further described in detail below in combination with examples. It is specially stated that: in the following examples, the specific conditions are not specified, and the conventional conditions or the conditions recommended by the manufacturer are used, and in the following examples, the raw materials used can be obtained from ordinary market sales unless otherwise specified.

[0047] Polyurethane resin, brand: BASF, model: Elastocoat® C 6226 / 107.

[0048] Nanosilica, particle size 100 nm.

[0049] Calcined kaolin, premium, 325 mesh.

[0050] Four acicular zinc oxide whiskers, diameter 1 μm, length 20 μm.

[0051] 3-Aminopropyltriethoxysilane, coupling agent KH-550.

[0052] 3-(2-Aminoethylamino)propyltrimethoxysilane, CAS No. 1760-24-3.

[0053] Glass fiber, 4800 Tex alkali-free continuous glass fiber.

[0054] Borosilicate glass microbeads, particle size 1 mm.

[0055] Octadecane, CAS No. 593-45-3.

[0056] Carbon nanotube, diameter 20 nm, length 1 μm.

[0057] TEOS, tetraethyl orthosilicate.

[0058] CTAB, cetyltrimethylammonium bromide.

[0059] PDMS base resin, polydimethylsiloxane.

[0060] MTES crosslinking agent, methyltriethoxysilane.

[0061] Polyurethane foaming material, two-component rigid polyurethane foaming material, purchased from Juxin Chemical.

[0062] Preparation Example

[0063] Preparation Example 1

[0064] The flame retardant includes 4 kg of magnesium dihydrogen phosphate and 10 kg of aluminum hydroxide, which are mixed uniformly to obtain the flame retardant.

[0065] Preparation Example 2

[0066] The compatibilizer includes 1 kg of 3-aminopropyl triethoxysilane and 2 kg of 3-(2-aminoethylamino) propyl trimethoxysilane in a weight ratio, which are mixed uniformly to obtain the compatibilizer.

[0067] Preparation Example 3

[0068] The polyurethane fire-resistant resin includes the following raw materials:

[0069] Polyurethane resin 16 kg;

[0070] Flame retardant prepared in Preparation Example 1 6 kg;

[0071] Compatibilizer prepared in Preparation Example 2 0.6 kg;

[0072] Dispersant BYK-163 0.6 kg;

[0073] Nano-silicon dioxide 3 kg;

[0074] Calcined kaolin 3 kg;

[0075] Four acicular zinc oxide whiskers 2 kg.

[0076] The preparation method of the polyurethane fire-resistant resin is that the raw materials are mixed uniformly to obtain the polyurethane fire-resistant resin.

[0077] Preparation Example 4

[0078] The polyurethane fire-resistant resin includes the following raw materials:

[0079] Polyurethane resin 23 kg;

[0080] Flame retardant prepared in Preparation Example 1 8kg;

[0081] Compatibilizer prepared in Preparation Example 2 0.8kg;

[0082] Dispersant BYK-163 0.7kg;

[0083] Nano-silica 4kg;

[0084] Calcined kaolin 4kg;

[0085] Four-needle zinc oxide whisker 3kg.

[0086] The preparation method of the polyurethane fireproof resin is as follows: uniformly mixing the raw materials to obtain the polyurethane fireproof resin.

[0087] Preparation Example 5

[0088] The polyurethane fireproof resin comprises the following raw materials:

[0089] Polyurethane resin 30kg;

[0090] Flame retardant prepared in Preparation Example 1 9kg;

[0091] Compatibilizer prepared in Preparation Example 2 1kg;

[0092] Dispersant BYK-163 0.8kg;

[0093] Nano-silica 5kg;

[0094] Calcined kaolin 5kg;

[0095] Four-needle zinc oxide whisker 5kg.

[0096] The preparation method of the polyurethane fireproof resin is as follows: uniformly mixing the raw materials to obtain the polyurethane fireproof resin.

[0097] Preparation Example 6

[0098] The polyurethane fireproof resin prepared in the present preparation example is different from that in Preparation Example 4 in that the polyurethane fireproof resin in the present preparation example is free of nano-silica, calcined kaolin and four-needle zinc oxide whisker.

[0099] Preparation Example 7

[0100] The polyurethane fireproof resin prepared in the present preparation example is different from that in Preparation Example 4 in that the polyurethane fireproof resin in the present preparation example is free of nano-silica.

[0101] Preparation Example 8

[0102] The polyurethane fireproof resin prepared in the present preparation example is different from that in Preparation Example 4 in that the polyurethane fireproof resin in the present preparation example is free of calcined kaolin.

[0103] Preparation Example 9

[0104] The polyurethane fire-resistant resin prepared in this preparation example is distinguished from that of Preparation Example 4 in that the polyurethane fire-resistant resin of this preparation example does not contain four needle-shaped zinc oxide whiskers.

[0105] Preparation Example 10

[0106] The preparation method of the self-repairing microcapsule is as follows:

[0107] (1) Preparation of core microcapsule containing phase change material: 2 kg of octadecane and 0.05 kg of carbon nanotubes are added to 10 L of surfactant Span 80, stirred at 4000 rpm for 10 min to form a stable water-in-oil emulsion. 10 L of an aqueous solution containing 5 wt.% polyvinyl alcohol is added to the water-in-oil emulsion, stirred for 30 min, and then the reaction system is transferred to a 60°C water bath for heating for 2 h. The surface of the droplets in the emulsion gradually forms a polymer film, forming core microcapsules containing phase change material. Centrifugal separation is performed at 3000 rpm for 10 min, and the core microcapsules are collected and washed with deionized water three times.

[0108] (2) Construction of silica shell: 5 L of TEOS, 0.5 L of ammonia water and 0.1 kg of CTAB are sequentially added to 10 L of deionized water and stirred uniformly; the pH value is adjusted to 9.5. The core microcapsules are suspended in the above solution, and the reaction is carried out continuously under stirring and at a temperature of 30°C for 4 hours, gradually depositing a uniform and dense silica shell layer on the outside of the core microcapsules. After the reaction is completed, centrifugal separation is performed at 3000 rpm for 10 min, and the double-layer microcapsules with silica shell are collected and washed with deionized water three times to remove residual substances.

[0109] (3) Filling of silicone resin repair agent: the double-layer microcapsules are placed in a vacuum drying box, and the internal air is removed by vacuumizing to -0.1 MPa. A premixed mixture of 3 kg of PDMS base resin and 0.5 kg of MTES crosslinking agent is added, and the liquid is allowed to fully penetrate into each double-layer microcapsule. Continue to maintain the vacuum state for 1 hour until all the microcapsules are effectively filled. Add 1 drop of platinum catalyst and gently shake to ensure uniform distribution. Then continue to vacuum for 15 minutes, and after removing the excess liquid, the microcapsules loaded with silicone resin are subjected to preliminary curing treatment at 60°C for 4 hours, so that the silicone resin is crosslinked but not completely cured. The preliminarily cured microcapsules are washed and dried to obtain self-repairing microcapsules.

[0110] Preparation Example 11

[0111] The tackifier includes the following raw materials:

[0112] Aluminum dihydrogen phosphate 50 kg;

[0113] borosilicate glass microbeads 4 kg;

[0114] self-repairing microcapsules prepared in Preparation Example 10 5 kg;

[0115] polyvinyl alcohol 3 kg;

[0116] sorbitol 3 kg;

[0117] citric acid 1 kg;

[0118] water 150 kg.

[0119] The tackifier was prepared by mixing aluminum dihydrogen phosphate, borosilicate glass microbeads, self-repairing microcapsules, and water, stirring at 95°C and 500 rpm for 15 min to obtain a mixture; adding polyvinyl alcohol, sorbitol, and citric acid to the mixture, and stirring uniformly at 500 rpm to obtain the tackifier.

[0120] Preparation Example 12

[0121] The tackifier included the following raw materials:

[0122] aluminum dihydrogen phosphate 55 kg;

[0123] borosilicate glass microbeads 5 kg;

[0124] self-repairing microcapsules prepared in Preparation Example 10 6 kg;

[0125] polyvinyl alcohol 5 kg;

[0126] sorbitol 4 kg;

[0127] citric acid 1.5 kg;

[0128] water 155 kg.

[0129] The tackifier was prepared by the same method as in Preparation Example 4.

[0130] Preparation Example 13

[0131] The tackifier included the following raw materials:

[0132] aluminum dihydrogen phosphate 60 kg;

[0133] borosilicate glass microbeads 6 kg;

[0134] self-repairing microcapsules prepared in Preparation Example 10 8 kg;

[0135] polyvinyl alcohol 8 kg;

[0136] sorbitol 5 kg;

[0137] Citric acid 2 kg;

[0138] Water 160 kg.

[0139] The tackifier was prepared according to the method of Preparation Example 4.

[0140] Preparation Example 14

[0141] The difference between the present preparation example and Preparation Example 12 is that the present preparation example does not contain borosilicate glass microbeads and self-repairing microcapsules.

[0142] Preparation Example 15

[0143] The difference between the present preparation example and Preparation Example 12 is that the present preparation example does not contain borosilicate glass microbeads.

[0144] Preparation Example 16

[0145] The difference between the present preparation example and Preparation Example 12 is that the present preparation example does not contain self-repairing microcapsules. Example

[0146] Example 1

[0147] A polyurethane energy-saving door and window profile is characterized in that, from inside to outside, it comprises a polyurethane heat-insulating layer, a steel lining layer and a polyurethane fire-resistant layer. The polyurethane fire-resistant layer is formed by curing a polyurethane fire-resistant prepreg. The polyurethane fire-resistant prepreg comprises a polyurethane fire-resistant resin and glass fibers. The polyurethane fire-resistant resin is prepared according to Preparation Example 3, and the amount of the polyurethane fire-resistant resin is 2 kg, and the amount of the glass fibers is 5 kg.

[0148] A method for preparing a polyurethane energy-saving door and window profile comprises the following steps:

[0149] (1) A polyurethane fire-resistant resin is prepared according to Preparation Example 3. Fire-resistant fibers are impregnated into the polyurethane fire-resistant resin according to the above-mentioned ratio, so as to obtain a polyurethane fire-resistant prepreg.

[0150] (2) The steel lining is preheated at a temperature of 130 ℃. Then, the steel lining is coated with the tackifier prepared according to Preparation Example 11, so as to form a steel lining layer. Then, the steel lining coated with the tackifier and the polyurethane fire-resistant prepreg are extruded through a co-extrusion die, so as to make the polyurethane fire-resistant prepreg adhere to the outer surface of the steel lining. The co-extrusion temperature is 155 ℃, the curing temperature is 175 ℃, and the curing time is 30 min. Thus, a prefabricated profile with a steel lining is formed, which comprises a steel lining layer and a polyurethane fire-resistant layer.

[0151] (3) The polyurethane foaming material is injected into the inner wall of the prefabricated profile, so as to form a polyurethane heat-insulating layer on the inner wall of the prefabricated profile. Thus, a door and window profile is obtained.

[0152] Example 2

[0153] A polyurethane energy-saving door and window profile, characterized in that, from inside to outside, it is sequentially provided with a polyurethane heat-insulating layer, a steel lining layer and a polyurethane fireproof layer. The polyurethane fireproof layer is formed by curing a polyurethane fireproof prepreg, and the polyurethane fireproof prepreg comprises a polyurethane fireproof resin and glass fiber. The polyurethane fireproof resin prepared in Preparation Example 4 is 2 kg, and the glass fiber is 5 kg.

[0154] A method for preparing a polyurethane energy-saving door and window profile, comprising the following steps:

[0155] (1) The polyurethane fireproof resin is prepared according to Preparation Example 4, and the fireproof fiber is infiltrated into the polyurethane fireproof resin according to the above-mentioned proportion, so as to obtain a polyurethane fireproof prepreg.

[0156] (2) The steel lining is preheated at a preheating temperature of 140 ℃, and then the surface of the steel lining is coated with the adhesion promoter prepared in Preparation Example 12 to form a steel lining layer. Then, the steel lining coated with the adhesion promoter and the polyurethane fireproof prepreg are extruded through a co-extrusion die, so that the polyurethane fireproof prepreg is attached to the outer surface of the steel lining, and is cured and shaped at a co-extrusion temperature of 160 ℃, a curing temperature of 180 ℃ and a curing time of 22 min, thereby forming a prefabricated profile provided with the steel lining inside, which comprises the steel lining layer and the polyurethane fireproof layer.

[0157] (3) The polyurethane foaming material is injected into the inner side wall of the prefabricated profile, so as to form a polyurethane heat-insulating layer on the inner side wall of the prefabricated profile, thereby obtaining the door and window profile.

[0158] Example 3

[0159] A polyurethane energy-saving door and window profile, characterized in that, from inside to outside, it is sequentially provided with a polyurethane heat-insulating layer, a steel lining layer and a polyurethane fireproof layer. The polyurethane fireproof layer is formed by curing a polyurethane fireproof prepreg, and the polyurethane fireproof prepreg comprises a polyurethane fireproof resin and glass fiber. The polyurethane fireproof resin prepared in Preparation Example 5 is 2 kg, and the glass fiber is 5 kg.

[0160] A method for preparing a polyurethane energy-saving door and window profile, comprising the following steps:

[0161] (1) The polyurethane fireproof resin is prepared according to Preparation Example 5, and the fireproof fiber is infiltrated into the polyurethane fireproof resin according to the above-mentioned proportion, so as to obtain a polyurethane fireproof prepreg.

[0162] (2) The steel lining is preheated at a preheating temperature of 150 ℃, and then the surface of the steel lining is coated with the adhesion promoter prepared in Preparation Example 13 to form a steel lining layer. Then, the steel lining coated with the adhesion promoter and the polyurethane fireproof prepreg are extruded through a co-extrusion die, so that the polyurethane fireproof prepreg is attached to the outer surface of the steel lining, and is cured and shaped at a co-extrusion temperature of 165 ℃, a curing temperature of 185 ℃ and a curing time of 15 min, thereby forming a prefabricated profile provided with the steel lining inside, which comprises the steel lining layer and the polyurethane fireproof layer.

[0163] (3) injecting polyurethane foaming material to the inner side wall of the preformed section bar to form a polyurethane heat preservation layer on the inner side wall of the preformed section bar to obtain the door and window section bar.

[0164] Example 4

[0165] The difference between this example and Example 2 is that the tackifier in this example is prepared in Preparation Example 14.

[0166] Example 5

[0167] The difference between this example and Example 2 is that the tackifier in this example is prepared in Preparation Example 15.

[0168] Example 6

[0169] The difference between this example and Example 2 is that the tackifier in this example is prepared in Preparation Example 16.

[0170] Comparative Example

[0171] Comparative Example 1

[0172] The broken bridge aluminum door and window section bar is purchased from Renqiu City Zhiliang Aluminum Co., Ltd.

[0173] Comparative Example 2

[0174] The difference between this comparative example and Example 2 is that the polyurethane fire-resistant resin in this comparative example is prepared in Preparation Example 6, and the tackifier is prepared in Preparation Example 14.

[0175] Comparative Example 3

[0176] The difference between this comparative example and Example 2 is that the polyurethane fire-resistant resin in this comparative example is prepared in Preparation Example 7, and the tackifier is prepared in Preparation Example 14.

[0177] Comparative Example 4

[0178] The difference between this comparative example and Example 2 is that the polyurethane fire-resistant resin in this comparative example is prepared in Preparation Example 8, and the tackifier is prepared in Preparation Example 14.

[0179] Comparative Example 5

[0180] The difference between this comparative example and Example 2 is that the polyurethane fire-resistant resin in this comparative example is prepared in Preparation Example 9, and the tackifier is prepared in Preparation Example 14.

[0181] Performance detection test

[0182] Detection method

[0183] 1. According to Appendix F of "GB / T 8484-2020 Building external doors and windows thermal insulation performance test method", the thermal insulation performance of the door and window profiles prepared in each example and comparative example is detected, and the heat transfer coefficient detection results are shown in Table 1.

[0184] 2. According to "GB / T 38252-2019 Building door and window fire resistance integrity test method", the fire resistance performance of the door and window profiles prepared in each example and comparative example is detected, and the fire resistance time detection results are shown in Table 1.

[0185] Table 1 Detection results of door and window profiles prepared in each example and comparative example

[0186]

[0187] It can be seen from the combination of Example 2 and Comparative Example 1 and Table 1 that the door and window profile prepared in the application has a lower heat transfer coefficient and a more obvious thermal insulation effect. The door and window profile prepared in the application also has excellent fire resistance performance, and the fire resistance limit far exceeds the requirement of fire resistance window 30 min. Under the condition that other components of the door and window are the same, the door and window profile prepared in the application can obtain better thermal insulation effect and fire resistance effect.

[0188] It can be seen from the combination of Example 4, Comparative Example 2, Comparative Example 3, Comparative Example 4, Comparative Example 5 and Table 1 that the polyurethane fire resistance resin of the application adds nano silicon dioxide, calcined kaolin and four needle-shaped zinc oxide whiskers, and the three are compounded, which greatly improves the thermal insulation performance and fire resistance performance of the door and window profile.

[0189] It can be seen from the combination of Example 2, Example 4, Example 5, Example 6 and Table 1 that the adhesion promoter of the application adds borosilicate glass beads and self-repairing microcapsules, which further significantly improves the thermal insulation performance and fire resistance performance of the door and window profile.

[0190] The specific embodiments are only an explanation of the application, and are not a limitation of the application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the application, they are protected by the patent law.

Claims

1. A polyurethane energy-saving door and window profile, characterized in that, The polyurethane thermal insulation layer, the steel lining layer and the polyurethane fireproof layer are arranged from the indoor to the outdoor in sequence; The polyurethane fireproof layer is cured from a polyurethane fireproof prepreg, the polyurethane fireproof prepreg comprises a polyurethane fireproof resin and glass fibers, and the weight ratio of the polyurethane fireproof resin to the glass fibers is 2:5; The polyurethane fireproof resin comprises the following raw materials in parts by weight: Polyurethane resin 16-30 parts; Flame retardant 6-9 parts; Compatibilizer 0.6-1 part; Dispersant BYK-163 0.6-0.8 parts; Nano-silicon dioxide 3-5 parts; Calcined kaolin 3-5 parts; Four acicular zinc oxide whiskers 2-5 parts; The steel lining layer comprises a steel lining and an adhesion promoter coated on the surface of the steel lining, and the coating thickness is 2 mm; The adhesion promoter comprises the following raw materials in parts by weight: Aluminum dihydrogen phosphate 50-60 parts; Borosilicate glass microbeads 4-6 parts; Self-repairing microcapsules 5-8 parts, the self-repairing microcapsules comprise core microcapsules, a silica shell and an organic silicone resin repair agent filled between the core microcapsules and the silica shell, the core microcapsules have polyvinyl alcohol as a shell and carbon nanotubes and octadecane as a capsule core; Polyvinyl alcohol 3-8 parts; Sorbitol 3-5 parts; Citric acid 1-2 parts; Water 150-160 parts.

2. A polyurethane energy saving door and window profile according to claim 1, characterized in that: The flame retardant comprises magnesium dihydrogen phosphate and aluminum hydroxide in a weight ratio of 1:2.

5.

3. A polyurethane energy saving door and window profile according to claim 1, characterized in that: The compatibilizer comprises 3-aminopropyl triethoxysilane and 3-(2-aminoethylamino) propyl trimethoxysilane in a weight ratio of 1:

2.

4. A polyurethane energy saving door and window profile according to claim 1, characterized in that, The preparation method of the self-repairing microcapsules is as follows: (1) preparing core microcapsules containing phase change materials: 2 parts by weight of octadecane and 0.05 parts by weight of carbon nanotubes are added to 10 parts by volume of surfactant Span 80, stirred at 4000 rpm for 10 min to form a stable water-in-oil emulsion; 10 parts by volume of an aqueous solution containing 5 wt.% polyvinyl alcohol is added to the water-in-oil emulsion, stirred for 30 min, and then the reaction system is transferred to a 60℃ water bath for heating for 2 h, a polymer film is gradually formed on the surface of the liquid droplets in the emulsion, forming core microcapsules containing phase change materials, centrifuged at 3000 rpm for 10 min, and the core microcapsules are collected and washed with deionized water three times; (2) building a silica shell: 5 parts by volume of TEOS, 0.5 parts by volume of ammonia water and 0.1 parts by weight of CTAB are sequentially added to 10 parts by volume of deionized water and stirred uniformly; the pH value is adjusted to 9.5; the core microcapsules are suspended in the above solution, continuously stirred and kept at a temperature of 30℃ for 4 hours to gradually deposit a uniform and dense silica shell layer on the outside of the core microcapsules; after the reaction is completed, centrifuged at 3000 rpm for 10 min, and the double-layer microcapsules with the silica shell are collected and washed with deionized water three times to remove residual substances; (3) Filling the organic silicone resin repair agent: the double-layer microcapsules are placed in a vacuum drying oven, vacuumed to-0.1 MPa, and the internal air is excluded; a premixed mixture of 3 parts by weight of PDMS base resin and 0.5 parts by weight of MTES crosslinking agent is added, and the liquid is fully penetrated into each double-layer microcapsule; continue to maintain the vacuum state for 1 hour until all the microcapsules are effectively filled; add 1 drop of platinum catalyst and gently shake to ensure uniform distribution; then continue to vacuum for 15 minutes, and after removing the excess liquid, the microcapsules loaded with organic silicone resin are subjected to preliminary curing treatment at 60℃ for 4 hours, so that the organic silicone resin is crosslinked but not completely cured; the preliminarily cured microcapsules are washed and dried to obtain the self-repairing microcapsules.

5. A polyurethane energy saving door and window profile according to claim 1, characterized in that, The preparation method of the adhesion promoter is: The aluminum dihydrogen phosphate, borosilicate glass beads, self-repairing microcapsules and water are mixed, stirred at 95℃ and 500rpm for 15min to obtain a mixture; polyvinyl alcohol, sorbitol and citric acid are added to the mixture and stirred uniformly to obtain the adhesion promoter.

6. A process for the preparation of polyurethane energy saving door and window profile as claimed in any one of claims 1 to 5, wherein, Comprising the following steps: (1) preparing polyurethane fire-resistant resin, and immersing the fire-resistant fiber into the polyurethane fire-resistant resin to obtain polyurethane fire-resistant prepreg; (2) preheating the steel lining at a temperature of 130-150℃, then coating the steel lining surface with the adhesion promoter to form a steel lining layer, and then extruding the steel lining coated with the adhesion promoter and the polyurethane fire-resistant prepreg through a co-extrusion die to make the polyurethane fire-resistant prepreg adhere to the outer surface of the steel lining, and curing and shaping at a co-extrusion temperature of 155-165℃, a curing temperature of 175-185℃ and a curing time of 15-30min to form a prefabricated profile with a steel lining inside, including a steel lining layer and a polyurethane fire-resistant layer; (3) injecting polyurethane foaming material into the inner side wall of the prefabricated profile to form a polyurethane insulation layer on the inner side wall of the prefabricated profile, and obtaining the door and window profile.

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