WO2019119691A1

WO2019119691A1 - Composition for forming flame-retardant polyurethane, skin, and aerostat

Info

Publication number: WO2019119691A1
Application number: PCT/CN2018/083663
Authority: WO
Inventors: 刘若鹏; 栾琳; 苏亚军
Original assignee: 东莞前沿技术研究院
Priority date: 2017-12-22
Filing date: 2018-04-19
Publication date: 2019-06-27
Also published as: CN109957231A

Abstract

A composition for forming a flame-retardant polyurethane, a skin, and an aerostat are provided. The composition comprises polyurethane, aluminum hypophosphite, diphenyl cresyl phosphate, and antimony trioxide. In preparation of a flame-retardant polyurethane material by using the polyurethane material, the aluminum hypophosphite, the diphenyl cresyl phosphate, and the antimony trioxide as starting materials, the three flame retardants thereof can be dispersed in the polyurethane in a special structure, which, in combination with the synergistic effect of the components, allows the modified polyurethane material prepared using the above starting materials to have excellent flame-retardant and anti-aging properties.

Description

Composition, skin and aerostat for forming flame retardant polyurethane

Technical field

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

Background technique

The aerostat skin material is a multifunctional composite material, generally composed of a bearing layer, a barrier layer, a weathering layer, an adhesive layer and the like.

A skin material and a preparation method thereof are reported in the prior art. In the preparation method, aluminum-plated PET is used as a barrier layer, and polyvinylidene fluoride (PVDF) or ETFE is used as a weather-resistant layer, and a skin material is prepared by lamination.

Another prior art reports a skin material and a method for its preparation. The hot-melt coating process is used to sequentially combine the barrier TPU and the weather-resistant TPU on the fiber cloth, and the prepared skin material has excellent comprehensive performance.

technical problem

The functional films used in the currently prepared skin materials are mainly PET (polyethylene terephthalate), TPU (polyurethane) and other polymer films, such polymer materials are prone to aging and easy to burn. Such defects, and thus there is a certain safety hazard in the use of the skin material.

On this basis, it is necessary to provide a skin material having excellent flame retardancy.

Technical solution

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a composition, a skin and an aerostat for forming a flame retardant polyurethane to solve the problem of poor flame retardancy of the existing skin material.

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

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

Further, the composition further comprises 5 to 8 parts by weight of the pigment; preferably, the pigment is nano titanium dioxide and/or zinc oxide.

Further, the composition comprises 100 parts by weight of polyurethane, 6-8 parts of aluminum hypophosphite, 5-8 parts of diphenyltoluene phosphate, 3-8 parts of antimony trioxide and 6-8 parts by weight. The pigment; 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 of a first polyol and an aryl diisocyanate; preferably, the first polyol is selected from the group consisting of Polyε-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 p-phenylene One or more of the group consisting of isocyanates; the weatherable polyurethane is an aliphatic polyurethane formed from a second polyol and a fatty acid diisocyanate; preferably, the second polyol is selected from the group consisting of polyε-caprolactone One or more of the group consisting of a polyol, a polycarbonate polyol, a polyoxypropylene polyol, and a polytetrahydrofuran polyol; preferably, the fatty acid diisocyanate is selected from hexamethylene diisocyanate and/or One or more of the group consisting of fluoronerone diisocyanate.

Another aspect of the present application also provides a skin comprising a weathering layer, a barrier layer and a bearing layer which are sequentially laminated, the weathering layer comprises a plurality of sub weathering layers stacked in sequence, and at least one sub weathering layer is a flame-retardant weather-resistant layer, the barrier layer comprises a plurality of sub-barrier layers stacked in sequence, at least one sub-barrier layer is a flame-retardant barrier layer, and the composition forming the sub weather-resistant layer and the composition forming the sub-barrier layer are each independently selected from the above combination Things.

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

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

Further, the weather resistant layer has a thickness of 20 to 150 μm.

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

Further, the skin further includes a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is disposed between the weatherable layer and the barrier layer, and the second adhesive layer is disposed 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 surface density of the bearing layer is 60 to 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 comprising a skin, the skin being the aforementioned skin.

Beneficial effect

When the flame retardant polyurethane material is prepared by using the polyurethane material, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide as raw materials, the above three flame retardants can be dispersed in the polyurethane by a special structure. At the same time, through the synergistic action of the components, the modified polyurethane material prepared by using the above raw materials has excellent flame retardant properties and anti-aging properties.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

1 shows a schematic structural view of a skin provided in accordance with an exemplary embodiment of the present invention;

Figure 2 is a schematic view showing the structure of a skin provided in accordance with a preferred embodiment of the present invention;

Figure 3 is a schematic view showing the structure of a skin provided in accordance with a preferred embodiment of the present invention;

Figure 4 shows a schematic view of the structure of a skin provided in accordance with a preferred embodiment of the present invention.

Wherein, the above figures include the following reference numerals:

10, weathering layer; 11, the first sub weathering layer; 12, the second sub weathering layer; 20, a barrier layer; 21, the first sub-barrier layer; 22, the second sub-barrier layer; 30, the bearing layer; a first adhesive layer; 50, a second adhesive layer.

Embodiments of the invention

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the embodiments.

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

In order to solve the above technical problems, the inventors have been groping and experimenting, and surprisingly found that when the flame retardant polyurethane material is prepared by using polyurethane material, aluminum hypophosphite, diphenyl cresyl phosphate and antimony trioxide as raw materials, due to the above three resistances The flammable agent can be dispersed in the polyurethane in a special structure, and at the same time, the modified polyurethane material prepared by using the above raw materials has excellent flame retardancy and anti-aging property by the synergistic action of the components.

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

The above-mentioned several component amounts include, but are not limited to, the above range, and limiting it to the above range is advantageous to better exert synergy between the components, thereby further improving the flame retardancy and anti-aging property of the polyurethane material. .

In actual use, pigments may 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 the pigment is also beneficial for improving the weather resistance of the polyurethane. Preferably, the above composition further comprises 5 to 8 parts by weight of the pigment in parts by weight. Preferably, the above pigments include, but are not limited to, nano titanium dioxide and/or zinc oxide.

The flame retardant polyurethane material prepared by using the above flame retardant polyurethane composition has good flame retardancy and aging resistance. Preferably, the composition comprises 100 parts by weight of polyurethane, 6-8 parts of aluminum hypophosphite, 5-8 parts of diphenyl toluene phosphate, 3 to 5 parts of antimony trioxide and 5 to 8 parts by weight. Pigments. The amount of each component in the above composition includes, but is not limited to, the above range, and its definition within the above range is advantageous for further improving the overall performance of the flame-retardant polyurethane material formed therefrom.

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 to the above range is advantageous for further improving the flame retardancy and aging resistance of the flame retardant polyurethane material.

In the above composition for forming a flame-retardant polyurethane provided by the present application, the polyurethane may be a polyurethane material commonly used in the art. The polyurethane includes a barrier polyurethane and 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 includes, but is not limited to, poly-ε-caprolactone polyol and/or polycarbonate a polyol; preferably, the aryl diisocyanate includes, but is not limited to, one or more of the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, and p-phenylene diisocyanate. .

The weatherable polyurethane is an aliphatic polyurethane formed from a second polyol and a diisocyanate fatty ester; preferably, the polyol includes, but is not limited to, poly-ε-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 polyurethanes include, but are not limited to, the above-mentioned several components, and the selection of the above components is advantageous for further improving the overall performance of the polyurethane materials.

In order to better understand the above technical solution, the present application also provides a skin, as shown in FIG. 1, the skin includes a weathering layer 10, a barrier layer 20 and a bearing layer 30 which are sequentially laminated, and the weathering layer 10 includes a plurality of sub weathering layers disposed in sequence, at least one sub weathering layer is a flame retardant weathering layer, the barrier layer 20 includes a plurality of sub-barrier layers stacked in sequence, and at least one sub-barrier layer is a flame retardant barrier layer, and a combination of sub weathering layers is formed. The composition of the article and the sub-barrier layer are each independently selected from the above compositions.

In the present application, the polyurethane material is mixed with aluminum hypophosphite, diphenylmethyl phosphate and antimony trioxide to uniformly distribute the above three flame retardants in the polyurethane material to obtain a flame retardant polyurethane material. . At the same time, by reasonably matching the above-mentioned several components, the synergistic effect between the components can significantly improve the flame retardancy and anti-aging properties of the polyurethane material, thereby obtaining good flame retardancy and anti-aging properties. Flame retardant polyurethane material. When the weather-resistant layer 10 and the barrier layer 20 of the skin are prepared by using the above polyurethane material, the barrier layer 20 and the bearing layer 30 on the inner side of the weather-resistant layer 10 are advantageously protected, thereby greatly improving the overall performance of the skin material and improving the use thereof. life.

In a preferred embodiment, as shown in FIG. 2, the skin further includes a first adhesive layer 40 and a second adhesive layer 50, wherein the first adhesive layer 40 is disposed between the weatherable 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 first adhesive layer 40 and the second adhesive layer 50 described above can be obtained by using an adhesive commonly used in the art. 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.

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

The plurality of sub-barrier layers are sequentially stacked as the barrier layer 20, which is advantageous for further improving the gas barrier property of the barrier layer 20, and at least one sub-barrier layer is made of the above flame-retardant polyurethane material. This is advantageous for further improving 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 which are sequentially stacked, and the second sub-barrier layer 22 is disposed on the first sub-barrier layer 21 and the second adhesive layer 50. between.

Preferably, the polyurethane in the composition forming the flame-retardant weather-resistant layer is a weather-resistant polyurethane, and the weather-resistant polyurethane is an aliphatic polyurethane formed from a second polyol and a fatty acid ester of diisocyanate; preferably, the second polyol is selected One or more selected from the group consisting of polyε-caprolactone polyol, polycarbonate polyol, polyoxypropylene polyol, and polytetrahydrofuran polyol; preferably, the fatty acid diisocyanate is selected from the group consisting of One or more of the group consisting of bis-isocyanate and/or isophorone diisocyanate. Preferably, as shown in FIG. 3, the weatherable layer 10 includes a first sub weathering layer 11 and a second sub weathering layer 12, and the second sub weathering layer 12 is disposed on the first sub weathering layer 11 and the barrier layer 20. The first sub weather-resistant layer 11 is the flame-retardant weather-resistant layer.

In the above skin material, the thickness of the weathering layer 10, the barrier layer 20, and the bearing layer 30 may be set to a thickness conventional in the art.

In a preferred embodiment, the weatherable layer 10 has a thickness of 20 to 150 μm. The thickness of the weatherable layer 10 includes, but is not limited to, the above range, and is limited to the above range, which is advantageous for further improving the weather resistance of the skin material and improving the service life of the skin material.

In a preferred embodiment, the barrier layer 20 has a thickness of 20 to 100 μm. The thickness of the barrier layer 20 includes, but is not limited to, the above range, and is limited to the above range, which is advantageous for further improving the gas barrier property of the skin material.

In a preferred embodiment, the load bearing layer 30 has an areal density of 60 to 120 g/m2. The areal density of the load-bearing layer 30 includes, but is not limited to, the above range, and defining it within the above range is advantageous in that the skin material has the advantages of light weight and high strength.

Preferably, the bearing layer 30 comprises, but is not limited to, a plain weave aramid fabric layer, a Kuraray polyarylate fiber fabric layer, a polyparaphenylene benzobisoxazole fiber fabric layer or a polyethylene fiber fabric layer or A variety.

Yet another aspect of the present application also provides an aerostat comprising a skin, the skin of the above-described skin provided by the present application.

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

The present application is further described in detail below with reference to the specific embodiments, which are not to be construed as limiting the scope of the claims.

Example 1

As shown in FIG. 4, the skin includes the weathering layer 10, the first adhesive layer 40, the barrier layer 20, the second adhesive layer 50, and the bearing layer 30, 10, 40, 20, 50, 30, which are sequentially stacked. It is 40 μm, 20 μm, 20 μm, 20 μm, 20 μm.

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (20 μm), and is prepared using the composition provided herein, wherein the composition forming the weatherable layer 10 is in parts by weight. 100 parts of polyurethane (aliphatic polyurethane prepared from poly-ε-caprolactone polyol and hexamethylene diisocyanate), 5 parts of aluminum hypophosphite, 10 parts of diphenyl toluene phosphate, 1 part of three Bismuth oxide 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 the first sub-barrier layer 21 is a non-flame-retardant modified aromatic polyester polyurethane (from poly-ε-caprolactone) The aromatic polyester polyester is prepared by using a polyol and diphenylmethane diisocyanate, and the second sub-barrier layer 22 is a flame-retardant modified aromatic polyester polyurethane. The second sub-barrier layer 22 is 100 parts by weight of polyurethane (aromatic polyester polyurethane prepared from poly-ε-caprolactone polyol and diphenylmethane diisocyanate), and 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 Kelly polyarylene fiber Vectran fabric layer (area density 60 g/m2). The first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 2

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (20 μm), both of which are prepared using the composition provided herein, wherein the composition forming the weatherable layer 10 is in parts by weight. 100 parts of polyurethane (aliphatic polyurethane prepared from poly-ε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 7 parts of diphenyl toluene phosphate, 4 parts Antimony trioxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave Kelly polyurethane fiber Vectran fabric layer having an areal density of 60 g/m2. The first adhesive layer 40 and the second adhesive layer 50 are polyurethane hot melt adhesive layers.

Example 3

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (20 μm), and is prepared using the composition provided herein, wherein the composition forming the weatherable layer 10 is in parts by weight. 100 parts of polyurethane (aliphatic polyurethane prepared from poly-ε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl toluene phosphate, 6 parts of three Bismuth oxide and 5 parts of nano titanium dioxide.

The bearing layer 30 is a plain weave Kelly polyurethane fiber Vectran fabric layer having 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 the weathering layer 10, the first adhesive layer 40, the barrier layer 20, the second adhesive layer 50, and the bearing layer 30, 10, 40, 20, 50, 30, which are sequentially stacked. It is 80 μm, 20 μm, 20 μm, 20 μm, 20 μm.

The weatherable layer 10 includes a first sub weathering layer 11 (40 μm) and a second sub weathering layer 12 (40 μm), and the weatherable layer 10 is prepared by using the composition provided herein to form the first sub weathering layer 11 by weight. The composition is 100 parts of polyurethane (an aliphatic polyurethane prepared from poly-ε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, and 6 parts of diphenyl toluene phosphate. 6 parts of antimony trioxide and 5 parts of nano titanium dioxide, and the second sub weathering layer 12 is a non-flame retardant modified aliphatic polyurethane (prepared from polyoxypropylene polyol and isophorone diisocyanate).

Example 5

As shown in FIG. 4, the skin includes the weathering layer 10, the first adhesive layer 40, the barrier layer 20, the second adhesive layer 50, and the bearing layer 30, 10, 40, 20, 50, 30, which are sequentially stacked. It is 40 μm, 20 μm, 40 μm, 20 μm, 20 μm.

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (20 μm), and is prepared by using the composition provided herein, and the composition for forming the weather resistant layer 10 is 100 parts by weight. Polyurethane (prepared from poly-ε-caprolactone polyol and hexamethylene diisocyanate), 7 parts of aluminum hypophosphite, 6 parts of diphenyl toluene 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), and the first sub-barrier layer 21 is a non-flame-retardant modified aromatic polyester polyurethane (from poly-ε-caprolactone) The second sub-barrier layer 22 is a flame-retardant modified aromatic polyester polyurethane, and the composition for forming the second sub-barrier layer 22 is 100 parts by weight. Polyurethane (prepared from poly-ε-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 Kelly polyurethane fiber Vectran fabric layer having 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 the weathering layer 10, the first adhesive layer 40, the barrier layer 20, the second adhesive layer 50, and the bearing layer 30, 10, 40, 20, 50, 30, which are sequentially stacked. It is 60 μm, 20 μm, 20 μm, 20 μm, 20 μm.

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (40 μm), and the composition forming the first sub weathering layer 11 is 100 parts by weight of polyurethane (by poly ε-hex) Preparation of 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, second sub weathering layer 12 is a non-flame retardant modified aliphatic polyurethane (prepared from a polyoxypropylene polyol and isophorone diisocyanate).

Example 7

As shown in FIG. 4, the skin includes the weathering layer 10, the first adhesive layer 40, the barrier layer 20, the second adhesive layer 50, and the bearing layer 30, 10, 40, 20, 50, 30, which are sequentially stacked. It is 70 μm, 20 μm, 20 μm, 20 μm, 20 μm.

The weatherable layer 10 includes a first sub weathering layer 11 (30 μm) and a second sub weathering layer 12 (40 μm), and the composition forming the first sub weathering layer 11 is 100 parts of a family polyurethane by weight-based (by ε-hex) Preparation of 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, second sub weathering layer 12 is a non-flame retardant modified aliphatic polyurethane (prepared from a polyoxypropylene polyol and isophorone diisocyanate).

Example 8

The weatherable layer 10 includes a first sub weathering layer 11 (20 μm) and a second sub weathering layer 12 (20 μm), both of which are prepared using the compositions provided herein. The composition for forming the weatherable layer 10 is 100 parts by weight of polyurethane (an aliphatic polyurethane prepared from ε-caprolactone polyol and hexamethylene diisocyanate), and 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), both of which are prepared using the compositions provided herein. The composition for forming the barrier layer 20 is 100 parts by weight of polyurethane (aromatic polyester polyurethane prepared from polyε-caprolactone polyol and diphenylmethane diisocyanate), and 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: 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 Embodiment 1 is:

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

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

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A composition for forming a flame retardant polyurethane, characterized in that the composition comprises polyurethane, aluminum hypophosphite, diphenylmethyl phosphate and antimony trioxide.
The composition according to claim 1, wherein said composition comprises 100 parts by weight of said polyurethane, 5 to 10 parts of said aluminum hypophosphite, and 5 to 10 parts of said phosphoric acid. Diphenyl tol ester and 1 to 10 parts of the antimony trioxide.
The composition according to claim 2, characterized in that the composition further comprises 5 to 8 parts by weight of the pigment; preferably, the pigment is nano-titanium dioxide and/or zinc oxide.
The composition according to claim 3, wherein said composition comprises 100 parts by weight of said polyurethane, 6 to 8 parts of said aluminum hypophosphite, and 5 to 8 parts of said phosphoric acid. Diphenyl tol ester, 3 to 8 parts of the antimony trioxide and 6 to 8 parts of the pigment;

Preferably, the ratio of the weight of the polyurethane, the aluminum hypophosphite, the diphenyl cresyl phosphate and the antimony trioxide is 100:7:6:6.
The composition according to claim 1, wherein the polyurethane is a barrier polyurethane and/or a weatherable 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 the group consisting of poly-ε-caprolactone polyols and/or polycarbonate polyols;

Preferably, the aryl diisocyanate is one or more selected from the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate and p-phenylene diisocyanate;

The weatherable polyurethane is an aliphatic polyurethane formed from a second polyol and a fatty ester of 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 acid diisocyanate is selected from one or more of the group consisting of hexamethylene diisocyanate and/or isophorone diisocyanate.
A skin comprising a weatherable layer (10), a barrier layer (20) and a bearing layer (30) laminated in sequence, wherein the weatherable layer (10) comprises a plurality of layers arranged in sequence a plurality of sub weathering layers, at least one of the sub weathering layers is a flame retardant weathering layer, the barrier layer (20) includes a plurality of sub-barrier layers stacked in sequence, and at least one of the sub-barrier layers is a flame-retardant barrier layer. The composition of the weatherable layer and the composition forming the sub-barrier layer are each independently selected from the composition of any one of claims 1 to 4.
The skin according to claim 6, wherein the polyurethane in the composition forming the flame-retardant barrier layer is a barrier polyurethane, and the barrier polyurethane is composed of a first polyol and a diisocyanate aryl group. An aromatic polyester polyurethane formed by an ester;

Preferably, the first polyol is selected from the group consisting of poly-ε-caprolactone polyols and/or polycarbonate polyols;

Preferably, the aryl diisocyanate is one or more selected from the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, and p-phenylene diisocyanate.
The skin according to claim 6, wherein the polyurethane in the composition for forming the flame-retardant weather-resistant layer is a weather-resistant polyurethane, and the weather-resistant polyurethane is a second polyol and a diisocyanate fatty ester. Formed aliphatic polyurethane;

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 acid diisocyanate is selected from one or more of the group consisting of hexamethylene diisocyanate and/or isophorone diisocyanate.
The skin according to any one of claims 6 to 8, characterized in that the weather resistant layer (10) has a thickness of 20 to 150 μm.
The skin according to any one of claims 6 to 8, characterized in that the barrier layer (20) has a thickness of 20 to 100 μm.
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 (40) disposed between the weatherable layer (10) and the barrier layer (20), the second adhesive layer (50) being disposed between the barrier layer (20) and the bearing layer (30) ;

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.
The skin according to any one of claims 6 to 8, characterized in that the bearing layer (30) has an areal density of 60 to 120 g/m 2 .
The skin according to claim 6, wherein the bearing layer (30) is selected from the group consisting of a plain woven aramid fabric layer, a Kuraray polyarylate fiber fabric layer, and a polyparaphenylene benzobisoxazole fiber. One or more of a fabric layer or a layer of polyethylene fiber fabric.
An aerostat comprising a skin, wherein the skin is the skin of any one of claims 6 to 13.