JPH04141119A - Flare-proof and light-insulating curtain - Google Patents

Abstract

PURPOSE:To obtain a curtain which is excellent in durability and resistant against thermal deterioration and keep a flare-insulating ability for a long time, by laminating a polyurethane adhesive layer having an incombustible agent, a polyisocyanate denaturation substance and urethane oligomer and the surface film layer on the rear face of an incombustible fiber base material and coloring at least one of the layers in a dark tone. CONSTITUTION:An incombustible agent is brome-bearing compound having at least one of or more activated hydrogen in its molecular or a brome-bearing urethane compound or a phosphorus-and brome-bearing urethane compound brought about from reaction of a phosphorus and brome-bearing compound with an organic polyisocyanate. Antimony trioxide is used together as an incombustible agent. A polyisocyanate denaturation substance is selected from tolylenediisocyanate or hexamethylene diisocyanate or urethane adduct composed of reaction product of isophorone diisocyanate and trimethylol propane. Urethane oligomer includes perfluoroalkyl radical brought about from the reaction of perfluoroalkyl radical-bearing hydroxyl compound and isocynate compound.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a flame-retardant blackout curtain that has excellent durability and long-lasting flame-retardant effect.

[Prior Art and Problems] Conventionally, blackout curtains used in public places such as theaters and hotels have been required to have flame retardant properties.
In addition, as a light-blocking curtain suitable for use in such places, the surface layer of the laminated structure of the curtain (the curtain shall be attached so that the surface layer is on the indoor side)
Generally, a fiber base material (referring to curtain fabric) is used as the curtain material, and a polyurethane layer colored in a dark color is laminated thereon. Conventionally, in manufacturing a light-blocking curtain with the above configuration, in order to impart flame-retardant performance to the light-blocking curtain, the fiber base material is subjected to flame-retardant treatment and a flame retardant is added to the polyurethane to make the polyurethane flame-retardant. Conventionally, flame retardants added to such polyurethane include halogen compounds, phosphate ester compounds, halogen-containing phosphate ester compounds,
It is known that halogen-containing flame retardants are added to various flame retardants such as organic compounds and inorganic compounds.

However, when these flame retardants are added to polyurethane, the flame retardant itself is an acidic substance, or
Since polyurethane has the property of releasing acidic substances such as halogen-based and phosphorous-based substances over time, hydrolytic deterioration of polyurethane is significantly accelerated due to this influence. Furthermore, in addition to this, photodegradation and thermal deterioration tend to be accelerated at the same time, resulting in defects such as embrittlement and deterioration of polyurethane, reducing its durability and making it unsustainable for long-term use. .

In addition, these flame retardants often have poor compatibility with polyurethane, so if a blackout curtain laminated with these flame retardants added is used for a long period of time, the flame retardant used will ooze out on the surface of the polyurethane film. There is also the problem that so-called bloom phenomenon tends to occur.

[Means for Solving the Problems] An object of the present invention is to provide a flame-retardant light-shielding curtain that solves the above-mentioned conventional drawbacks.

That is, the present invention provides: (1) A flame retardant fiber base material or a flame retardant treated fiber base material is used as the surface layer of the curtain, and a polyurethane containing a flame retardant, a modified polyisocyanate, and a urethane oligomer is formed on the back surface of the wood. A flame retardant, characterized in that a polyurethane film layer containing a flame retardant, a modified polyisocyanate, and a urethane oligomer is laminated via an adhesive layer, and at least one of the adhesive layer and the film layer is colored in a dark color. blackout curtains.

(2) The flame-retardant blackout curtain according to claim 1, wherein the polymeric diol constituting the polyurethane is a polyester diol.

(3) The flame-retardant blackout curtain according to claim 1, wherein the polyurethane has a softening temperature of 170° C. or higher.

(4) The N fuel agent is a bromine-containing compound having at least one active hydrogen in the molecule or a bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound which is a reaction product of a phosphorus-containing bromine compound and an organic polyisocyanate. The flame-retardant blackout curtain according to claim 1, characterized in that:

(5) The flame-retardant blackout curtain according to claim 4, characterized in that antimony trioxide is used in combination as a flame retardant. (6) The modified polyisocyanate is tolylene diisocyanate, hexamethylene diisocyanate, or isophorone diisocyanate and trimethylol. The flame-retardant blackout curtain according to claim 1, characterized in that it is one or more selected from urethane adducts made of reaction products with propane.

(7) The flameproof blackout curtain according to claim 1, wherein the urethane oligomer is a perfluoroalkyl group-containing urethane oligomer that is a reaction product of a perfluoroalkyl group-containing hydroxyl compound and an isocyanate compound.

The main points are as follows.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 shows an embodiment of the flame-retardant blackout curtain 1 of the present invention,
The light-shielding curtain has a polyurethane film layer 4 containing a flame retardant, a modified polyisocyanate, and a urethane oligomer laminated on the back side of a fiber base material 2 via a polyurethane adhesive layer 3 containing a flame retardant, a modified polyisocyanate, and a urethane oligomer. It has the following configuration.

In the present invention, the fiber base material 2 includes a base material itself that is flame retardant, and a fiber material such as knitted fabric, woven fabric, non-woven fabric, etc. that has been subjected to flame retardant treatment. It can be carried out prior to or during the manufacturing process.

The flame-retardant fiber base material 2 includes, for example, polyester spun yarn obtained by copolymerizing or mixing a phosphorus compound or a halogen compound as a flame retardant with polyester, filament alone or blended fiber, or modacrylic synthetic fiber. A knitted fabric, a woven fabric, or a nonwoven fabric is used by knitting, weaving, or entangling individual or blended fibers such as polyfural synthetic fibers, vinyl chloride synthetic fibers, and vinylidene chloride synthetic fibers.

In the case where the fiber base material is subjected to flame retardant treatment, the fiber base material 2 may include natural fibers such as cotton and linen, recycled fibers such as rayon, staple fiber, and acetate, and synthetic fibers such as polyester, polyamide, and polyacrylonitrile. Knitted fabrics, woven fabrics, non-woven fabrics, etc. made of individual fibers or various blended fibers are used. Incidentally, impregnated fabrics obtained by impregnating these knitted fabrics, woven fabrics, nonwoven fabrics, etc. with resin, including flame-retardant fibers, can also be used. Furthermore, the fiber base material 2 may be one whose front or back surface is raised or raised, if necessary.

In order to impart flame retardancy to the fiber base material 2 through post-treatment, post-treatment may be performed using a flame retardant such as a halogen compound, a halogenated phosphate ester compound, a phosphorus-containing nitrogen-containing compound, etc., or a mixture thereof. Bye. As a treatment method, methods such as an impregnation method, a coating method, and a gravure method can be adopted.

If these flame retardants are excessively adhered to the fiber base material, the flame retardant may migrate to the polyurethane film layer 4 and deteriorate the polyurethane adhesive layer 3 and the polyurethane film layer 4. The amount of fuel attached is 5-2
The content is preferably 0% by weight.

The front or back side of the fiber base material 2 may or may not be brushed or napped, but if it is brushed or napped, the texture of the blackout curtain will be soft and it will have a rich sense of volume. is obtained.

The polyurethane adhesive layer 3 and the polyurethane film layer 4 contain a flame retardant, a modified polyisocyanate, and a urethane oligomer. There are bromine-containing urethane compounds or phosphorus-containing bromo-urethane compounds that do not produce 2. 3
- reaction product of dibromopropanol and hexamethylene diisocyanate, reaction product of 2,2-bis(4-hydroxyethoxy-3,5-dibromophenyl)propane and hexamethylene diisonoanate, tetrakis(hydroxymethyl ) Reaction product of phosphonium bromide and tolylene diisocyanate, reaction product of hydroxymethyl-ureidomethylphosphonium bromide and tolylene diisocyanate, 2,2-bis(4
A reaction product of -hydroxy-3,5-dibromophenyl)propane, a phosphate polyol, and hexamethylene diisocyanate, etc. can be used.

The bromine-containing compound or phosphorus-containing bromine-urethane compound as a flame retardant contained in the polyurethane adhesive layer 3 and the polyurethane film layer 4 has a bromine content of 10 to 10.
40% and a phosphorus content of 1 to 10% is preferable, and the amount added is 1 part by weight per 100 parts by weight of polyurethane solid content.
5 to 40 parts by weight is preferred. Examples of the above-mentioned bromo-urethane compound or phosphorus-containing bromo-urethane compound used in the present invention include DFR-
10015,, DFR-10025, DFR~1003
3 (Product name), manufactured by Dainippon Ink Co., Ltd.: Frame Guard P
Examples include flame retardants having a urethane bond in the molecule, such as U-100 and Frame Guard PU-300 (product name).

Furthermore, in the present invention, an excellent flame retardant effect can be obtained by using antimony trioxide together with the above flame retardant. In other words, when antimony trioxide is used in combination with a bromine-containing urethane compound or a phosphorus-containing bromine-containing urethane compound, the bromine-based flame retardant and antimony trioxide combine during combustion to produce antimony bromide with a high boiling point, resulting in a surface-shielding effect. It is thought that it acts to cut off the supply of oxygen by exhibiting flame retardant, and is used because high flame retardant performance can be obtained with a small amount of flame retardant added due to the synergistic effect. Furthermore, antimony trioxide also combines with the flame retardants used in the flame retardant treatment of fiber base materials during combustion to exhibit a synergistic effect. The amount of antimony trioxide added is preferably 30 to 60% by weight based on the bromo-urethane compound or the phosphorus-containing bromo-urethane compound.

In the present invention, a modified polyisocyanate is added to the polyurethane adhesive layer 3 and the polyurethane film layer 4, so that the active hydrogen in the polyurethane and bromourethane compound or phosphorus-containing bromourethane compound molecules and the polyisocyanate modified product molecule are added to the polyurethane adhesive layer 3 and the polyurethane film layer 4. By reacting with isocyanate groups, the polyurethane and flame retardant are further bonded three-dimensionally with the modified polyisocyanate, thereby preventing the flame retardant from falling off and maintaining the flame retardant effect more sustainably. do. Furthermore, by adding a modified polyisocyanate, it is possible to improve heat resistance, heat deterioration resistance, etc. as a crosslinking effect of polyurethane.

Examples of modified polyisocyanates include urethane adducts made of a reaction product of tolylene diisocyanate and trimethylolfuropane, urethane adducts made of a reaction product of hexamethylene diisocyanate and trimethylolpropane, or isophorone diisocyanate and trimethylolpropane. Examples include urethane adducts made of reaction products with methylolpropane. These modified polyisocyanates can be used alone or in mixtures.

The modified polyisocyanate contained in the polyurethane adhesive layer 3 and the polyurethane film layer 4 is preferably a urethane adduct with an isocyanate content of 12 to 14%, and the amount added is 100% polyurethane solid content! The amount of the modified polyisocyanate added is preferably 3 to 20 parts by weight.If the amount of the modified polyisocyanate is less than 3Ii parts by weight, the crosslinking density is too low and there is no effect.On the contrary, if the amount added is 20 parts by weight or more, the crosslinking density is If the temperature is too high, the polyurethane becomes hard and the pot life of the polyurethane solution becomes short, which is disadvantageous.

Note that when the polyurethane adhesive layer 3 is a two-component polyurethane, the modified polyisocyanate also acts as a crosslinking agent for the two-component polyurethane, so it is necessary to add it in a larger amount than the above amount. Examples of the modified polyisocyanate used in the present invention include Coronate, Coronate H, manufactured by Nippon Polyurethane Co., Ltd.
Examples include Desmodur L1 Desmodur N1 Sumidur N-75 manufactured by Sumitomo Bayer Urethane Co., Ltd., and Crisbon NX and Parnock DN-950 manufactured by Dainippon Ink Co., Ltd.

Since the polyurethane adhesive layer 3 and the polyurethane film layer 4 of the present invention generally have water absorption or hygroscopicity, their durability in flame retardant performance is particularly susceptible to a decrease in washing resistance.Therefore, the polyurethane adhesive layer 3 and by adding a specific substance to the polyurethane film layer 4,
The purpose was to improve the flame retardant performance after washing by reducing the water absorption or hygroscopicity of each layer. That is, in the present invention, the polyurethane adhesive layer 3 and the polyurethane film layer 4
By containing a urethane oligomer containing a specific perfluoroalkyl group that is highly compatible with the polyurethane or with the polyurethane solvent solution, it can be significantly improved without impairing the original functions and characteristics of polyurethane. It was possible to provide low water absorption.

The perfluoroalkyl group-containing urethane oligomer added to the polyurethane adhesive layer 3 and the polyurethane film layer 4 is a compound (a) having both a perfluoroalkyl group and a hydroxyl group specified by the following general formula (1). A typical example is one obtained by reacting a non-cyclic isocyanate compound (b) having an isocyanate equivalent of 100 or more. These perfluoroalkyl group-containing urethane oligomers are M
Those with n of 1,500 or more have the effect of significantly reducing water absorption, and more preferably those with n of 20
00 to 7,000 is preferable. Conversely, when using a perfluoroalkyl group-containing urethane oligomer having an in of 7,000 or more, it has excellent compatibility with polyurethane or miscibility with a solvent solution, and has excellent durability. However, as the molecular weight increases, the content of perfluoroalkyl groups decreases, so the effect of reducing water absorption performance tends to gradually decrease, which is not preferable. The amount of the perfluoroalkyl radical urethane oligomer added is preferably 1 to 10 parts by weight based on 100 parts by weight of the polyurethane solid content.

Rf-X-OH [1] Two, typical compounds as the above compound (a) include Ca
F+x(jlzcHzOHXCJ+tCI(zcHzo
l(,CsF+tSO□N(CHff)CH2C)IZ
OH, C@F,? 5O2N(C3H?)CHICH,O
ll 5CIF, tS(hN(CH,CIZOH)z,
CJ+ff5OJ(CiTo)(CHzCHO)zCH
2CH20H,, CaF+3SOzNHCH2CH-(
OH)-CHzOH,CtP+5CONHCLCLOI
(,CqP+q-0-CbH--OH,,C9F+9-
0-So□N(CHI)-C)IICO(CHff)O
Examples include H.

In addition, as the isocyanate compound 1111 (b), incyanate prepolymers which are reaction products with the following compounds are used, such as polyoxypropylene glycol and tolylene diisocyanate, butylene adipate and diphenylmethane-4,4 diisocyanate, butylene Adipate and tolylene diisocyanate, trimethylolpropane and 1,3-butylene glycol and tolylene diisocyanate, trimethylolpropane and 1,3
- Isocyanate prepolymers such as butylene glycol and butylene adipate and tolylene diisocyanate.

Polyurethane can be obtained by reacting a polymeric diol such as polyester or polyether with an organic diisocyanate and an active hydrogen compound as a chain extender. Both are limited to polyester polyurethane. Examples of the polymer diols used in the polyester polyurethane include condensed polyester diols, polymerized lactone polyester diols, and polycarbonate diols. Polyurethanes using these polymeric diols generally have excellent heat resistance, heat deterioration resistance, oxidative deterioration resistance, etc., and are cited as essential conditions for promoting flame retardation of polyurethane.

On the other hand, polyether polyurethane has excellent hydrolysis resistance, but is inferior in heat resistance, heat deterioration resistance, and oxidation deterioration resistance, and is therefore inconvenient as a polyurethane to be used in the flame-retardant blackout curtain of the present invention.

In addition, the softening temperature of polyester polyurethane is 170
``C or higher, preferably 190℃ or higher. Polyurethane generally has the property of being easily combustible, and in order to make polyurethane more flame retardant, in addition to adding a flame retardant, it is necessary to add a flame retardant. As mentioned above, it is necessary to have excellent heat resistance and heat deterioration resistance, and for this purpose, it is necessary to raise the softening temperature of polyurethane in order to increase the decomposition temperature of polyurethane.

The polyurethane constituting the adhesive layer 3 is a polyester polyurethane for the reasons mentioned above, and may be either a one-component type or a two-component polyurethane, and the 100% modulus of this polyurethane should be 10 to 60 kg/c-j. is preferred. When using a two-component polyurethane, it is necessary to add the above-mentioned modified polyisocyanate or the like as a crosslinking agent. As the crosslinking agent, trimethylolpropane (TMP) and tolylene diisopropane (T
Dr) adduct, TMP and hexamethylene diisocyanate (HMDI) adduct, TMP and isophorone diisocyanate (IPDI) adduct, and F(
The amount of the crosslinking agent, such as a trimer of MDI, added is 10 to 30 parts by weight per 100 parts by weight of the polyurethane solid content. If the amount of crosslinking agent is too small, the polyurethane adhesive layer 3
Since the heat resistance and bondability with flame retardants and urethane oligomers are poor, flame retardant performance is affected, and if the amount of crosslinking agent is too large, the feel of the blackout curtain will become too hard, which is undesirable. Note that an appropriate amount of catalyst may be used in the two-component polyurethane as necessary to promote the reaction with the crosslinking agent.

As this catalyst, it is preferable to add an amine catalyst rather than a metal catalyst in consideration of the durability of the polyurethane. In the polyurethane adhesive layer 3, antioxidant,
Various additives such as light stabilizers, ultraviolet absorbers, and hydrolysis inhibitors can be added.

Note that the flame retardant bromine-containing urethane compound or phosphorus-containing bromine-containing urethane compound and urethane oligomer contained in the polyurethane adhesive layer 3 all have active hydrogen in their molecules, so they react with the polyurethane together with the polyisocyanate. The polyurethane adhesive layer 3, which is incorporated into the polyurethane structure constituting the polyurethane adhesive layer and exhibits excellent long-lasting flame retardancy, can contain opaque dark pigments, mainly black pigments, for the purpose of light shielding. Furthermore, light-shielding powder such as metal powder can also be mixed if necessary. The thickness of the polyurethane adhesive layer 3 is 10 to 100 mm in terms of the light shielding effect and the adhesive strength with the fiber base material.
μm is preferred.

In the polyurethane film layer 4, the polyurethane adhesive J!
Flame retardants, polyisocyanate modifications and urethane oligomers similar to those contained in No. 3 are added. The polyurethane constituting the polyurethane film layer 4 is an I-wave type polyurethane, and the 100% modulus of the polyurethane is preferably 30 to 200 kg/ell, and the thickness is preferably 5 to 100 μm. Antioxidants, light stabilizers,
Various additives such as ultraviolet absorbers and hydrolysis inhibitors can be added. The polyurethane film layer 4 can be colored with a light color based on opaque pigments, including a light-shielding effect, and light-shielding powders such as carbon powder or metal powder can also be mixed in if necessary. can.

The polyurethane film layer 4 is formed by applying a one-component polyurethane solution containing a flame retardant, a modified polyisocyanate, a urethane oligomer, a coloring agent, etc. for forming a polyurethane film layer onto a flat or squeezed release paper using a doctor knife or the like. After obtaining a uniform thickness, it is dried in a heated oven to form a polyurethane film.

Next, on this polyurethane film layer 4, an I-wave or two-component polyurethane solution containing a flame retardant, modified polyisocyanate, urethane oligomer, colorant, etc. for forming a polyurethane adhesive layer is applied uniformly using a doctor knife or the like. After adjusting the thickness, it is laminated with a fiber base material 2, and in the case of two-component polyurethane, the polyurethane adhesive layer 3 is reacted and cured, and then the release paper is peeled off.A flame-retardant blackout curtain can be manufactured by a transfer method. .

Hereinafter, the present invention will be explained in more detail with reference to specific examples.

Example 1 Softening temperature 175'C1100% on flat release paper
Polyester polyurethane (manufactured by Dainippon Ink Co., Ltd.: Crisbon NB735) with a modulus of 90 kg/c-d and bromine-containing urethane compound (manufactured by Dainichiseika Co., Ltd.: DFR-10033) 30 parts per 100 parts by weight of polyurethane solid content
Parts by weight, 10 parts by weight of polyisocyanate modified product (manufactured by Dainippon Ink Co., Ltd.: Crisbon NX), urethane oligomer (
Manufactured by Dainippon Ink Co., Ltd.: Crispon Assister FX-3-D
) 5 parts by weight, and a light-colored colorant (manufactured by Dainippon Ink Co., Ltd.:
A polyurethane solution containing 20 parts by weight of Dilac TV Color was applied using a knife coater to a dry thickness of 13 μm, and dried with hot air at 95° C. for 1.5 minutes to form a polyurethane film. On the surface of this polyurethane film, a two-component adhesive jPf (manufactured by Dainippon Ink Co., Ltd.: Crisbon 4010) of polyester-based polyurethane with a 100% modulus of 26 kg/cd was applied with a bromine-containing urethane compound (DFR) per 100 parts by weight of polyurethane solid content.
1003S) 30 parts by weight, modified polyisocyanate (
Crosslinking agent) (Crisbon NX) 20 parts by weight, catalyst (jetanolamine) 0.9 parts by weight, urethane oligomer (Crisbon Assister FX3-D) 5 parts by weight, and black colorant (Dainippon Ink Co., Ltd.: Dailac UE) Color) 2
A polyurethane solution containing 5 parts by weight was coated with a knife coater so that the dry thickness was 30 μm.
After drying with hot air at 0°C for 1.5 minutes, the adhesive-coated side was bonded to the fiber base material, and further aged at 60°C for 48 hours to reaction cure the adhesive, and then the release paper was peeled off. I got blackout curtains. In addition, the fiber base material has a basis weight of 19
A one-sided coarsely brushed woven fabric made of 0 g/rrf polyester/rayon blend fiber is used as a flame retardant with a phosphorus-containing nitrogen-containing compound (Dainippon Ink Co., Ltd.: Frame Guard VF-74) 10
Parts by weight, 5 parts by weight of organic phosphorus compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard 5316-5), 3 parts by weight of melamine resin
parts by weight, 0.3 parts by weight of catalyst, and 85 parts by weight of water, squeezed to a sea urchin/tobinkua ratio of 80%, dried for 3 minutes at 130°C, and further dried at 150°C.
The material was heat-treated for 2 minutes to make it flame retardant.

Example 2 Polyester polyurethane (manufactured by Dainippon Ink Co., Ltd.: Crispon 8266EL) with a softening temperature of 190°C and a 1,00% modulus of 70 kg/c-d was coated with phosphorus-containing material per 100 parts by weight of polyurethane solid content on a release paper with a stopper. Brome-urethane compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard PU
-300) 20 parts by weight, 10 parts by weight of antimony trioxide (manufactured by Lead Bath Chemical Co., Ltd.: AT-3B), 8 parts by weight of modified polyisocyanate (Cryspon NX), 3 parts by weight of urethane oligomer (Cryspon Assister FX-3-D) A polyurethane solution containing 20 parts by weight and 20 parts by weight of a light-colored coloring agent (Guirac TV Color) was coated with a knife coater to a dry thickness of 20 μm, and coated at 95° C. for 1.
A polyurethane film was formed by drying with hot air for 5 minutes. The surface of this polyurethane film has a 100% modulus of 25
kg/ej of a two-component polyester polyurethane adhesive (manufactured by Dainichiseika Chemical Co., Ltd.: Rezamin UD-603), 20 parts by weight of a phosphorus-containing bromine urethane compound (Frame Guard PU-300) per 100 parts by weight of polyurethane solid content. ,
Antimony trioxide (AT-3B) 10 parts by weight, modified polyisocyanate (crosslinking agent) (Crisbon NX) 17 parts by weight, catalyst (jetanolamine) 0.9 parts by weight, urethane oligomer (Crisbon Assister FX-3- D)
A polyurethane solution containing 3 parts by weight and 25 parts by weight of a black colorant (Dilac UE Color) was applied using a knife coater to a dry thickness of 40 μm, and dried with hot air at 80°C for 1.5 minutes. After this, the adhesive-coated side was bonded to a fiber base material, and the adhesive was further aged at 60° C. for 48 hours to react and harden the adhesive, and then the release paper was peeled off to obtain a light-shielding curtain.

As the fiber base material, a roughly brushed woven fabric having a basis weight of 180 g/'nf and made of flame-retardant polyester fiber obtained by copolymerizing polyester with a phosphorus compound was used.

Comparative Example 1 A light-shielding curtain was obtained in the same manner as in Example 1, except that no urethane oligomer was added to the polyurethane film layer and polyurethane adhesive layer.

Comparative Example 2 A light-shielding curtain was obtained in the same manner as in Example 1, except that the modified polyisocyanate and the urethane oligomer were not added to the polyurethane film layer and the polyurethane adhesive layer.

Comparative Example 3 A light-shielding curtain was obtained in the same manner as in Example 2, except that no urethane oligomer was added to the polyurethane film layer and polyurethane adhesive layer.

Table 1 shows the results of testing the flame resistance of each of the blackout curtains obtained in Example 1.2 and Comparative Example 1.2.3 under the conditions shown below.

[Flame resistance test] Tested according to method A-1 (45° micro burner method) according to JISL1091.

That is, measure the afterflame time (3 seconds or less), residue time (5 seconds or less), and carbonized area (30c+1 or less) after heating for 1 minute, and then measure the afterflame time (3 seconds or less) after 3 seconds of flaming.
, residue time (5 seconds or less), and carbonized area (30 d or less) were measured, and if the values were within these (parentheses), the combustion test was passed.

In addition, the washing process for evaluating washing resistance is: in the case of washing with water, 15 minutes x 5 times according to J[5L1042], and in the case of dry cleaning, 15 minutes x 5 times according to JISLIOI8.
After repeated washing, it was subjected to a flammability test and evaluated in the same manner as above.

[Polyurethane softening temperature measurement]

The softening temperature of polyurethane is measured by the following method.

Prepare a polyurethane dry film with a thickness of 40 to 50 μm, cut it into a size of 20 m wide and 50 cm long,
One longitudinal edge is gripped with a gripping tool such as a clamp, a load of 450 g/d is applied to the other edge, and this is placed in a heating type opener and the temperature is increased at a rate of 2°C per minute to stretch the film. The temperature at which this occurs (or the temperature at which the film is cut) is defined as the softening temperature.

Table-(1) Part 3) As is clear from these results, the light-shielding curtain of the present invention has excellent flame retardant properties and contains specific flame retardants,
Excellent durability due to the addition of perfluoroalkyl group-containing urethane oligomer and modified polyisocyanate.
Moreover, there was no oozing of flame retardant.

〔Effect of the invention〕

As explained above, the flame retardant blackout curtain of the present invention improves the heat resistance, heat deterioration resistance, etc. of polyurethane by regulating the composition and softening temperature of polyurethane. It has excellent flame retardant properties due to the synergistic effect when used in combination with bromine-containing urethane compounds, phosphorus-containing bromo-urethane compounds, or antimony trioxide, and unlike conventional blackout curtains using polyurethane, the addition of flame retardants makes polyurethane ,
It does not become brittle or accelerate deterioration and has excellent hydrolysis resistance and light resistance.

In addition, by adding a modified polyisocyanate, the polyurethane and the bromine-containing urethane compound or the phosphorus-containing bromine-containing urethane compound can be bonded to each other, and excellent flame retardant performance can be maintained for a long period of time. Furthermore, by adding a specific perfluoroalkyl group-containing urethane oligomer to polyurethane, it is incorporated into the polyurethane molecules and reduces the water absorption of polyurethane, giving polyurethane water and oil repellency. A flame-retardant blackout curtain with excellent washability and durability was obtained.

[Brief explanation of drawings]

The figure is a longitudinal cross-sectional view of one embodiment of the flameproof blackout curtain of the present invention. 1...Flame retardant blackout curtain 2...Fiber base material (curtain fabric) 3...Polyurethane adhesive layer 4...Polyurethane film layer Patent applicant: Axis Co., Ltd.

Claims (1)

[Scope of Claims] (1) A flame retardant fiber base material or a flame retardant treated fiber base material is used as the surface layer of the curtain, and a flame retardant, a polyisocyanate modified product, and a urethane oligomer are coated on the back side of the base material. A polyurethane film layer containing a flame retardant, a modified polyisocyanate, and a urethane oligomer is laminated via a polyurethane adhesive layer containing the polyurethane, and at least one of the adhesive layer and the film layer is colored in a dark color. Flame retardant blackout curtains. (2) The flame-retardant blackout curtain according to claim 1, wherein the polymeric diol constituting the polyurethane is a polyester diol. (3) The flame-retardant blackout curtain according to claim 1, wherein the polyurethane has a softening temperature of 170° C. or higher. (4) The flame retardant is a bromine-containing compound having at least one active hydrogen in the molecule or a bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound which is a reaction product of a phosphorus-containing bromine compound and an organic polyisocyanate. The flame-retardant blackout curtain according to claim 1, characterized in that: (5) The flame-retardant blackout curtain according to claim 4, characterized in that antimony trioxide is used in combination as a flame retardant. The flame-retardant blackout curtain according to claim 1, characterized in that it is one or more selected from urethane adducts consisting of reaction products of. (7) The flameproof blackout curtain according to claim 1, wherein the urethane oligomer is a perfluoroalkyl group-containing urethane oligomer that is a reaction product of a perfluoroalkyl group-containing hydroxyl compound and an isocyanate compound.