CN109957231A - Composition for forming flame-retardant polyurethane, skin and aerostat - Google Patents

Abstract

The present invention provides a composition, a skin and an aerostat for forming a flame-retardant polyurethane. The composition comprises polyurethane, aluminum hypophosphite, diphenylcresyl phosphate and antimony trioxide. When the flame-retardant polyurethane material is prepared by using polyurethane material, aluminum hypophosphite, diphenylcresyl phosphate and antimony trioxide as raw materials, the three flame retardants can be dispersed in the polyurethane in a special structure, and the modified polyurethane material prepared by using the raw materials has excellent flame retardant performance and anti-aging performance through the synergistic effect of each component.

Description

Compositions, skins and aerostats for forming flame retardant polyurethanes

technical field

The present invention relates to the field of aerostat manufacturing, in particular to a composition for forming flame retardant polyurethane, a skin and an aerostat.

Background technique

The aerostat skin material is a multi-functional composite material, which is generally composed of a bearing layer, a barrier layer, a weather-resistant layer, and an adhesive layer.

The existing literature reports a skin material and its preparation method. In the preparation method, aluminized PET is used as the barrier layer, and polyvinylidene fluoride (PVDF) or ETFE is used as the weather-resistant layer, and the skin material is prepared by lamination.

Another prior art reports a skin material and its preparation method. It uses a hot-melt coating process to compound barrier TPU and weather-resistant TPU on the fiber cloth in turn, and the prepared skin material has excellent comprehensive performance.

The functional films used in the currently prepared skin materials are mainly polymer films such as PET (polyethylene terephthalate) and TPU (polyurethane). Therefore, there are certain safety hazards in the use of the skin material.

On this basis, it is necessary to provide a skin material with excellent flame retardant properties.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a composition for forming flame retardant polyurethane, a skin and an aerostat, so as to solve the problem of poor flame retardancy of the existing skin materials.

In order to achieve the above object, according to one aspect of the present invention, there is provided a composition for forming a flame retardant polyurethane, the composition comprising polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide.

Further, in parts by weight, the composition comprises 100 parts of polyurethane, 5-10 parts of aluminum hypophosphite, 5-10 parts of diphenyl cresyl phosphate and 1-10 parts of antimony trioxide.

Further, in parts by weight, the composition further includes 5-8 parts of pigments; preferably, the pigments are nano-titanium dioxide and/or zinc oxide.

Further, in parts by weight, the composition comprises 100 parts of polyurethane, 6-8 parts of aluminum hypophosphite, 5-8 parts of diphenyl cresyl phosphate, 3-8 parts of antimony trioxide and 6-8 parts of antimony trioxide. Preferably, the weight ratio of polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide is 100:7:6:6.

Further, the polyurethane is a barrier polyurethane and/or a weather-resistant polyurethane; the barrier polyurethane is an aromatic polyester polyurethane formed by a first polyol and an aryl diisocyanate; preferably, the first polyol is selected from Poly-ε-caprolactone polyol and/or polycarbonate polyol; preferably, the aryl diisocyanate is selected from the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and terephthalene diisocyanate One or more of the group consisting of isocyanates; the weather-resistant polyurethane is an aliphatic polyurethane formed from a second polyol and aliphatic diisocyanate; preferably, the second polyol is selected from polyε-caprolactone One or more of the group consisting of polyol, polycarbonate polyol, polyoxypropylene polyol and polytetrahydrofuran polyol; preferably, fatty diisocyanate is selected from hexamethylene diisocyanate and/or isocyanurate One or more of the group consisting of phorone diisocyanate.

Another aspect of the present application also provides a skin, the skin includes a weather-resistant layer, a barrier layer and a bearing layer that are stacked in sequence, the weather-resistant layer includes a plurality of sub-weather-resistant layers that are stacked in sequence, and at least one sub-weather-resistant layer is Flame retardant and weather-resistant layer, the barrier layer includes a plurality of sub-barrier layers stacked in sequence, at least one sub-barrier layer is a flame-retardant barrier layer, and the composition for forming the sub-weather-resistant layer and the composition for forming the sub-barrier layer are independently selected from the above combinations. thing.

Further, the polyurethane in the composition for forming the flame retardant barrier layer is a barrier polyurethane, and the barrier polyurethane is an aromatic polyester polyurethane formed by a first polyol and an aryl diisocyanate; preferably, the first poly The polyol is selected from polyε-caprolactone polyol and/or polycarbonate polyol; preferably, the aryl diisocyanate is selected from toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and one or more of the group consisting of p-phenylenediisocyanate.

Further, the polyurethane in the composition for forming the flame-retardant and weather-resistant layer is a weather-resistant polyurethane, and the weather-resistant polyurethane is an aliphatic polyurethane formed by a second polyol and aliphatic diisocyanate; One or more selected from the group consisting of poly-ε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol and polytetrahydrofuran polyol; preferably, fatty diisocyanate is selected from hexamethylene One or more of the group consisting of diisocyanates and/or isophorone diisocyanates.

Further, the thickness of the weather-resistant layer is 20 to 150 μm.

Further, the thickness of the barrier layer is 20-100 μm.

Further, the skin further includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is arranged between the weather-resistant layer and the barrier layer, and the second adhesive layer is arranged between the barrier layer and the bearing layer; preferably , the first adhesive layer and the second adhesive layer are respectively a solvent-based two-component polyurethane adhesive layer or a polyurethane hot-melt adhesive layer.

Further, the areal density of the bearing layer is 60-120 g/m ² .

Further, the bearing layer is selected from one or more of a plain weave aramid fabric layer, a kuraray polyarylate fiber fabric layer, a polyparaphenylene benzobisoxazole fiber fabric layer or a polyethylene fiber fabric layer.

Another aspect of the present application also provides an aerostat, which includes a skin, and the skin is the above-mentioned skin.

Using the technical scheme of the present invention, when the flame retardant polyurethane material is prepared by using polyurethane material, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide as raw materials, the above three flame retardants can be dispersed in the polyurethane with a special structure. At the same time, through the synergistic effect of each component, the modified polyurethane material prepared by using the above raw materials has excellent flame retardant performance and anti-aging performance.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 shows a schematic structural diagram of a skin provided according to a typical embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a skin provided according to a preferred embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a skin provided according to a preferred embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a skin provided according to a preferred embodiment of the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

10. Weather-resistant layer; 11. First sub-weather-resistant layer; 12. Second sub-weather-resistant layer; 20. Barrier layer; 21. First sub-barrier layer; 22. Second sub-barrier layer; 30. Bearing layer; A first adhesive layer; 50. A second adhesive layer.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the embodiments.

As described in the background art, the existing skin materials have the problem of poor flame retardancy. In order to solve the above technical problems, the present application provides a composition for forming a flame retardant polyurethane, the composition comprising: polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide.

In order to solve the above-mentioned technical problems, the inventor has been surprised to find that the flame retardant polyurethane material is prepared by using polyurethane material, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide as raw materials. The flame retardant can be dispersed in the polyurethane with a special structure, and at the same time, through the synergistic effect of each component, the modified polyurethane material prepared by using the above raw materials has excellent flame retardant performance and anti-aging performance.

The modified polyurethane material prepared by using the above-mentioned raw materials has excellent flame retardant performance and anti-aging performance. In a preferred embodiment, in parts by weight, the above-mentioned composition for forming a flame retardant polyurethane comprises 100 parts of polyurethane, 5-10 parts of aluminum hypophosphite, 5-10 parts of diphenyl cresyl phosphate and 3 to 5 parts of antimony trioxide.

The amount of the above-mentioned components includes but is not limited to the above-mentioned range, and it is beneficial to limit it within the above-mentioned range, and the synergistic effect between the components can be better played, thereby further improving the flame retardant performance and anti-aging performance of the polyurethane material. .

In the actual use process, pigments can be added to the above-mentioned flame-retardant polyurethane-forming composition according to actual needs, so that the polyurethane material has a corresponding color, and the addition of pigments is also conducive to improving the weather resistance of the polyurethane. Preferably, in parts by weight, the above-mentioned composition further comprises 5-8 parts of pigment. Preferably, the above-mentioned pigments include but are not limited to nano-titanium dioxide and/or zinc oxide.

The flame-retardant polyurethane material prepared by using the above-mentioned flame-retardant polyurethane composition has good flame-retardant performance and anti-aging performance. Preferably, in parts by weight, the composition comprises 100 parts of polyurethane, 6-8 parts of aluminum hypophosphite, 5-8 parts of diphenyl cresyl phosphate, 3-5 parts of antimony trioxide and 5-8 parts of antimony trioxide of pigments. The amount of each component in the above-mentioned composition includes but is not limited to the above-mentioned range, and limiting it within the above-mentioned range is beneficial to further improve the comprehensive performance of the flame retardant polyurethane material formed by it.

More preferably, the weight ratio of polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide is 100:7:6:6. Limiting the weight ratio of polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide within the above range is conducive to further improving the flame retardancy and anti-aging properties of the flame retardant polyurethane material.

In the above-mentioned composition for forming a flame retardant polyurethane provided in the present application, the polyurethane can be a polyurethane material commonly used in the art. The polyurethane includes barrier polyurethane and weather-resistant polyurethane.

The barrier polyurethane is an aromatic polyester polyurethane formed from a first polyol and an aryl diisocyanate; preferably, the first polyol includes, but is not limited to, poly-epsilon-caprolactone polyol and/or polycarbonate Polyols; preferably, aryl diisocyanates include, but are not limited to, one or more of the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and p-phenylene diisocyanate .

The weather-resistant polyurethane is an aliphatic polyurethane formed from a second polyol and aliphatic diisocyanate; preferably, the polyol includes, but is not limited to, polyε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol alcohol, polytetrahydrofuran polyol; preferably, the diisocyanate includes, but is not limited to, one or more of the group consisting of hexamethylene diisocyanate and/or isophorone diisocyanate. The types of polyurethane include but are not limited to the above-mentioned components, and the selection of the above-mentioned components is beneficial to further improve the comprehensive performance of the polyurethane material.

In order to better understand the above technical solutions, the present application also provides a skin. As shown in FIG. 1 , the skin includes a weather-resistant layer 10 , a barrier layer 20 and a load-bearing layer 30 that are stacked in sequence. The weather-resistant layer 10 includes A plurality of sub-weather-resistant layers are stacked in sequence, at least one sub-weather-resistant layer is a flame-retardant weather-resistant layer, the barrier layer 20 includes a plurality of sub-barrier layers stacked in sequence, at least one sub-barrier layer is a flame-retardant barrier layer, forming a combination of sub-weather-resistant layers The material and the sub-barrier-forming composition are each independently selected from the above-mentioned compositions.

In the present application, by mixing the polyurethane material with aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide, the above three flame retardants are relatively uniformly distributed in the polyurethane material, and the polyurethane material with flame retardancy is prepared. . At the same time, through the reasonable combination of the above-mentioned components, the flame retardant properties and anti-aging properties of polyurethane materials can be significantly improved by means of the synergistic effect between the components, so as to obtain good flame retardant properties and anti-aging properties. flame retardant polyurethane material. When the above-mentioned polyurethane material is used to prepare the weather-resistant layer 10 and the barrier layer 20 of the skin, it is beneficial to protect the barrier layer 20 and the bearing layer 30 inside the weather-resistant layer 10, thereby greatly improving the comprehensive performance of the skin material as a whole and improving its use. life.

In a preferred embodiment, as shown in FIG. 2 , the above-mentioned skin further includes a first adhesive layer 40 and a second adhesive layer 50 , wherein the first adhesive layer 40 is arranged between the weather-resistant layer 10 and the barrier layer 20 , the second adhesive layer 50 is disposed between the barrier layer 20 and the bearing layer 30 . The above-mentioned first adhesive layer 40 and second adhesive layer 50 can be prepared by using adhesives commonly used in the art. Preferably, the first adhesive layer 40 and the second adhesive layer 50 are solvent-based two-component polyurethane adhesive layers or polyurethane hot-melt adhesive layers, respectively.

Preferably, the polyurethane in the composition for forming the flame retardant barrier layer is a barrier polyurethane, and the barrier polyurethane is an aromatic polyester polyurethane formed from a first polyol and an aryl diisocyanate; preferably, the first poly The polyol is selected from polyε-caprolactone polyol and/or polycarbonate polyol; preferably, the aryl diisocyanate is selected from toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and one or more of the group consisting of p-phenylenediisocyanate.

A plurality of sub-barrier layers are stacked in sequence to form the barrier layer 20, which is beneficial to further improve the gas and water barrier properties of the barrier layer 20, and at least one sub-barrier layer is made of the above flame retardant polyurethane material. This is beneficial to further improve the flame retardant properties of the skin material. Preferably, as shown in FIG. 4 , the barrier layer 20 includes a first sub-barrier layer 21 and a second sub-barrier layer 22 arranged in sequence, and the second sub-barrier layer 22 is arranged on the first sub-barrier layer 21 and the second adhesive layer 50 . between.

Preferably, the polyurethane in the composition for forming the flame-retardant and weather-resistant layer is a weather-resistant polyurethane, and the weather-resistant polyurethane is an aliphatic polyurethane formed from a second polyol and aliphatic diisocyanate; preferably, the second polyol is selected from One or more selected from the group consisting of poly-ε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol and polytetrahydrofuran polyol; preferably, fatty diisocyanate is selected from hexamethylene One or more of the group consisting of diisocyanates and/or isophorone diisocyanates. Preferably, as shown in FIG. 3 , the weather-resistant layer 10 includes a first sub-weather-resistant layer 11 and a second sub-weather-resistant layer 12 arranged in layers, and the second sub-weather-resistant layer 12 is disposed on the first sub-weather-resistant layer 11 and the barrier layer 20 Meanwhile, the first sub-weather-resistant layer 11 is the above-mentioned flame-retardant and weather-resistant layer.

Among the above-mentioned skin materials, the thicknesses of the weather-resistant layer 10, the barrier layer 20 and the bearing layer 30 can be set by selecting the thicknesses conventional in the art.

In a preferred embodiment, the thickness of the weather-resistant layer 10 is 20-150 μm. The thickness of the weather-resistant layer 10 includes but is not limited to the above-mentioned range, and limiting it to the above-mentioned range is beneficial to further improve the weather-resistant performance of the skin material and improve the service life of the skin material.

In a preferred embodiment, the thickness of the barrier layer 20 is 20-100 μm. The thickness of the barrier layer 20 includes, but is not limited to, the above-mentioned range, and limiting it to the above-mentioned range is beneficial to further improve the gas and water barrier properties of the skin material.

In a preferred embodiment, the areal density of the bearing layer 30 is 60-120 g/m ² . The areal density of the bearing layer 30 includes, but is not limited to, the above-mentioned range, and limiting it within the above-mentioned range is beneficial to the advantages of light weight and high strength of the skin material.

Preferably, the bearing layer 30 includes, but is not limited to, one of a plain weave aramid fabric layer, a kuraray polyarylate fabric layer, a polyparaphenylene benzobisoxazole fiber fabric layer or a polyethylene fiber fabric layer or variety.

Another aspect of the present application also provides an aerostat, including a skin, and the skin is the above-mentioned skin provided by the present application.

The above-mentioned skin material has excellent flame-retardant performance and anti-aging performance, so using the above-mentioned skin material to prepare the aerostat is beneficial to improve the flame-retardant performance and anti-aging performance of the aerostat, and at the same time improve the service life of the aerostat.

The present application will be described in further detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present application.

Example 1

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 40μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (20 μm), and is prepared by using the composition provided in this application, wherein, in parts by weight, the composition for forming the weather-resistant layer 10 is: 100 parts of polyurethane (aliphatic polyurethane prepared from polyε-caprolactone polyol and hexamethylene diisocyanate), 5 parts of aluminum hypophosphite, 10 parts of diphenyl cresyl phosphate, 1 part of Antimony oxide and 5 parts nano titanium dioxide.

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave kuraray polyarylate Vectran fabric layer (area density is 60 g/m ² ). The first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 2

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 40μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (20 μm), both of which are prepared by using the composition provided in the present application, wherein, in parts by weight, the composition for forming the weather-resistant layer 10 100 parts of polyurethane (aliphatic polyurethane prepared from polyε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 7 parts of diphenyl cresyl phosphate, 4 parts of Antimony trioxide and 5 parts of nano-titanium dioxide.

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave Kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² . The first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 3

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 40μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (20 μm), and is prepared by using the composition provided in this application, wherein, in parts by weight, the composition for forming the weather-resistant layer 10 is: 100 parts of polyurethane (aliphatic polyurethane prepared from polyε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of Antimony oxide and 5 parts nano titanium dioxide.

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² , and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 4

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 80μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (40 μm) and a second sub-weather-resistant layer 12 (40 μm). The composition is 100 parts of polyurethane (aliphatic polyurethane prepared from polyε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of antimony trioxide and 5 parts of nano-titanium dioxide, the second sub-weather-resistant layer 12 is non-flame retardant modified aliphatic polyurethane (prepared from polyoxypropylene polyol and isophorone diisocyanate).

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² , and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 5

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 40μm, 20μm, 40μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (20 μm), and is prepared by using the composition provided in the present application. By weight, the composition for forming the weather-resistant layer 10 is 100 parts. Polyurethane (prepared from polyε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of antimony trioxide and 5 parts of nanometer Titanium dioxide.

The barrier layer 20 includes a first sub-barrier layer 21 (20 μm) and a second sub-barrier layer 22 (20 μm). The first sub-barrier layer 21 is a non-flame retardant modified aromatic polyester polyurethane (made of polyε-caprolactone). polyol and diphenylmethane diisocyanate), the second sub-blocking layer 22 is a flame-retardant modified aromatic polyester polyurethane, and the composition for forming the second sub-blocking layer 22 is 100 parts by weight. Polyurethane (prepared from polyε-caprolactone polyol and toluene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of antimony trioxide and 5 parts of nano-titanium dioxide; The force layer 30 is a plain weave kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² , and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 6

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 60μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (40 μm). In parts by weight, the composition for forming the first sub-weather-resistant layer 11 is 100 parts of polyurethane (made of poly ε-hexane). Lactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of antimony trioxide and 5 parts of nano-titanium dioxide, the second sub-weathering layer 12 is a non-flame retardant modified aliphatic polyurethane (prepared from polyoxypropylene polyol and isophorone diisocyanate).

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² , and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 7

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 70μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (30 μm) and a second sub-weather-resistant layer 12 (40 μm). In parts by weight, the composition for forming the first sub-weather-resistant layer 11 is 100 parts of a family of polyurethane (made of ε-hexane). Lactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl cresyl phosphate, 6 parts of antimony trioxide and 5 parts of nano-titanium dioxide, the second sub-weathering layer 12 is a non-flame retardant modified aliphatic polyurethane (prepared from polyoxypropylene polyol and isophorone diisocyanate).

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm). Polyol and diphenylmethane diisocyanate are prepared into aromatic polyester polyurethane), and the second sub-blocking layer 22 is a flame retardant modified aromatic polyester polyurethane. In parts by weight, the second sub-blocking layer 22 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave kuraray polyarylate Vectran fabric layer with an areal density of 60 g/m ² , and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 8

As shown in FIG. 4 , the skin includes a weather-resistant layer 10 , a first adhesive layer 40 , a barrier layer 20 , a second adhesive layer 50 and a load-bearing layer 30 , which are stacked in sequence. 40μm, 20μm, 20μm, 20μm, 20μm.

The weather-resistant layer 10 includes a first sub-weather-resistant layer 11 (20 μm) and a second sub-weather-resistant layer 12 (20 μm), both of which are prepared by using the composition provided in the present application. Wherein, in parts by weight, the composition for forming the weather-resistant layer 10 is 100 parts of polyurethane (aliphatic polyurethane prepared from ε-caprolactone polyol and hexamethylene diisocyanate), 5 parts of aluminum hypophosphite , 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide and 5 parts of nano titanium dioxide.

The barrier layer 20 includes a first sub-barrier layer 21 (10 μm) and a second sub-barrier layer 22 (10 μm), and both are prepared by using the composition provided in the present application. In parts by weight, the composition for forming the barrier layer 20 is 100 parts of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), 5 parts of hypophosphorous acid Aluminum, 10 parts of diphenyl cresyl phosphate, 1 part of antimony trioxide, and 5 parts of nano-titanium dioxide.

The bearing layer 30 is a polyparaphenylene benzobisoxazole fiber fabric layer (area density is 70 g/m ² ), and the first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Comparative Example 1

The difference from Example 1 is:

In parts by weight, the composition for forming the weather-resistant layer 10 is 50 parts of thermoplastic polyurethane (Elastollan 1185A10), 35 parts of melamine cyanurate ((1,3,5-triazine-2,4,6(1H,3H,5H) )-trione with 1,3,5-triazine-2,4,6-triamine (1:1)), 5 parts of resorcinol bis(diphenyl phosphate), 10 parts of diethyl Aluminum phosphinate.

Performance test: Test the limiting oxygen index (LOI) of the skin material according to GB/T 2406.2-2009, and test the flame retardant grade of the skin material according to the UL 94 standard. The test results are shown in Table 1.

Table 1

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (14)

1. A composition for forming a flame retardant polyurethane, characterized in that the composition comprises polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide. 2 . The composition according to claim 1 , wherein, in parts by weight, the composition comprises 100 parts of the polyurethane, 5-10 parts of the aluminum hypophosphite, and 5-10 parts of the all The diphenyl cresyl phosphate and 1-10 parts of the antimony trioxide. 3. The composition according to claim 2, characterized in that, in parts by weight, the composition further comprises 5-8 parts of a pigment; preferably, the pigment is nano-titanium dioxide and/or zinc oxide. The composition according to claim 3, characterized in that, in parts by weight, the composition comprises 100 parts of the polyurethane, 6-8 parts of the aluminum hypophosphite, and 5-8 parts of the the diphenyl cresyl phosphate, 3-8 parts of the antimony trioxide and 6-8 parts of the pigment; Preferably, the weight ratio of the polyurethane, the aluminum hypophosphite, the diphenyl cresyl phosphate and the antimony trioxide is 100:7:6:6. 5. The composition according to claim 1, wherein the polyurethane is a barrier polyurethane and/or a weather-resistant polyurethane; The barrier polyurethane is an aromatic polyester polyurethane formed from a first polyol and an aryl diisocyanate; Preferably, the first polyol is selected from polyε-caprolactone polyol and/or polycarbonate polyol; Preferably, the aryl diisocyanate is selected from one or more of the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and p-phenylene diisocyanate; The weather-resistant polyurethane is an aliphatic polyurethane formed from a second polyol and aliphatic diisocyanate; Preferably, the second polyol is selected from one or more of the group consisting of polyε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol and polytetrahydrofuran polyol; Preferably, the fatty diisocyanate is selected from one or more of the group consisting of hexamethylene diisocyanate and/or isophorone diisocyanate. 6. A skin, the skin comprising a weather-resistant layer (10), a barrier layer (20) and a load-bearing layer (30) that are stacked in sequence, characterized in that the weather-resistant layer (10) comprises stacked layers in sequence. A plurality of sub-weather-resistant layers are provided, at least one of the sub-weather-resistant layers is a flame-retardant and weather-resistant layer, the barrier layer (20) includes a plurality of sub-barrier layers arranged in sequence, and at least one of the sub-barrier layers is a flame-retardant barrier layer, The composition for forming the sub-weatherable layer and the composition for forming the sub-barrier layer are each independently selected from the compositions described in any one of claims 1 to 4. 7 . The skin according to claim 6 , wherein the polyurethane in the composition for forming the flame retardant barrier layer is a barrier polyurethane, and the barrier polyurethane is composed of a first polyol and diisocyanate. 8 . Aromatic polyester polyurethanes formed from aryl esters; Preferably, the first polyol is selected from polyε-caprolactone polyol and/or polycarbonate polyol; Preferably, the aryl diisocyanate is selected from one or more of the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and p-phenylene diisocyanate. 8 . The skin according to claim 6 , wherein the polyurethane in the composition for forming the flame-retardant and weather-resistant layer is a weather-resistant polyurethane, and the weather-resistant polyurethane is composed of a second polyol and diisocyanate. 9 . Aliphatic polyurethanes formed from fatty esters; Preferably, the second polyol is selected from one or more of the group consisting of polyε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol and polytetrahydrofuran polyol; Preferably, the fatty diisocyanate is selected from one or more of the group consisting of hexamethylene diisocyanate and/or isophorone diisocyanate. 9. The skin according to any one of claims 6 to 8, wherein the weather-resistant layer (10) has a thickness of 20-150 μm. 10 . The skin according to claim 6 , wherein the barrier layer ( 20 ) has a thickness of 20-100 μm. 11 . 11. The skin according to any one of claims 6 to 8, wherein the skin further comprises a first adhesive layer (40) and a second adhesive layer (50), wherein the first adhesive layer (50) An adhesive layer (40) is arranged between the weather-resistant layer (10) and the barrier layer (20), and the second adhesive layer (50) is arranged between the barrier layer (20) and the bearing layer (30) between; Preferably, the first adhesive layer (40) and the second adhesive layer (50) are respectively a solvent-based two-component polyurethane adhesive layer or a polyurethane hot-melt adhesive layer. 12. The skin according to any one of claims 6 to 8, wherein the bearing layer (30) has an areal density of 60-120 g/m ² . 13. The skin according to claim 6, wherein the bearing layer (30) is selected from the group consisting of plain weave aramid fabric layer, kuraray polyarylate fabric layer, polyparaphenylene benzobisoxane One or more of the azole fiber fabric layer or the polyethylene fiber fabric layer. 14. An aerostat comprising a skin, wherein the skin is the skin of any one of claims 6 to 13.