KR100847882B1 - Flexible polyurethane foam to reduce smell and increase the antimicrobial properties and manufacturing method for the same - Google Patents

Abstract

The present invention relates to a flexible polyurethane foam composition and a method for producing a foam with added odor reduction and antimicrobial properties. More particularly, in the preparation of the flexible polyurethane foam, the odor characteristics are improved compared to the conventional flexible urethane foam. In preparing a flexible polyurethane foam by catalyzing a diisocyanate with a polyol to prepare a urethane foam, the precious metal nanoparticles are predispersed in a polyether polyol having a content of 20 to 60% by weight of a vinyl-based copolymer. In this way, the dispersibility of the noble metal nanoparticles can be secured to prevent precipitation of the noble metal nanoparticles, and the mixed resin can be reacted with a diisocyanate to prepare a polyurethane foam in which the noble metal nanoparticles are directly distributed in the flexible polyurethane foam. And, the soft polyurethane foam of the present invention smell Is reduced compared to conventional foam is added antimicrobial properties related to goods, clothing, furniture, etc. When using the needle more odor to expect the desired effects and the reduced anti-microbial is added flexible polyurethane foam composition and a method of manufacturing a foam.

Nanoparticles, Precious Metals, Flexible Polyurethane Foam, Antibacterial, Odor

Description

Flexible polyurethane foam to reduce smell and increase the antimicrobial properties and manufacturing method for the same}

1 is a test report measured the antimicrobial properties of the flexible polyurethane foam obtained in Example 1 of the present invention,

2 is a test report of the antimicrobial properties of the flexible polyurethane foam obtained in Comparative Example 1 measured by the Korea Institute of Chemical Testing.

The present invention relates to a flexible polyurethane foam composition and a method for producing the foam with added odor reduction and antibacterial properties.

Soft polyurethane is widely used in raw materials of automobiles, cushion materials of bedding furniture, clothing products, shoes materials, etc. due to the inherent elasticity and light weight.

However, at present, the demand for reducing the smell of urethane foam and the demand for antibacterial has been gradually increasing, various methods have been tried. Various deodorants are introduced / used for odor reduction, odor improvement through improvement of post-treatment process, and coating / impregnating / injecting urethane foam to prevent the growth of mold, bacteria, and viruses through the use of commercialized antibacterial agents. It is used.

Among them, antibacterial and odor reduction using precious metals have been historically proven and used for a long time, and methods using the precious metals have been commercialized. Prior patent application method using a urethane-metal composite as a method of directly injecting or coating a urethane using a noble metal is as follows.

In practical application No. 20-2004-00363, a solution containing nano silver ions was introduced during the manufacture of urethane foam, and in Patent No. 10-2004-0022780, a coating containing silver nano ions on the surface of a pillow or mattress Although there is an effect, it is essentially different from that of the present invention in that silver nano ions are used, and in Utility Model No. 20-2005-0002233, although some of the mattresses using the protrusions were attached to the surface of the protrusions, they had an antibacterial effect. There is a difference between the antibacterial effect of the urethane production.

In addition, US Pat. No. 6,375,964 describes the impregnation of silver nano ions with a porous material in the preparation of a surface cleaner, and US Pat. No. 5,413,788 describes the use of silver nano ions supported on a titania material as an antimicrobial material. It is a different use than that of, and is not a direct injection method.

U.S. Patent No. 4,728,323 also describes the use of silver containing salts in the production of antimicrobial wound dressings.

As described above, various methods such as deodorant and organic substance antimicrobial agent have been introduced to reduce the antibacterial and odor of urethane foam, and the method through the introduction of nano ions and the method through coating have been introduced. However, when used in the form of ions, the effect is insignificant, which makes it difficult to use.

Nano-noble metal powder used in the present invention is directly related to the method of adding a foam and a urethane-nano precious metal powder composite having an excellent effect on the antibacterial and odor reduction produced using the above method. .

Accordingly, the inventors of the present invention previously dispersed nanoparticles of a noble metal selected from gold, silver, platinum, and the like in a polymer polyether polyol containing 20 to 60% by weight of a solid content of a polyvinyl compound in the production of a flexible polyurethane foam. When mixed by mixing the noble metal nanoparticles are not uniformly dispersed and precipitated, can be directly added during the production of polyurethane, the obtained polyurethane foam was found that the smell is reduced, antibacterial properties are added to complete the present invention.

Accordingly, an object of the present invention is to provide a flexible polyurethane foam composition and a method for producing a foam to which the noble metal nanoparticles are applied to which odor reduction and antibacterial properties are added.

The present invention features a flexible polyurethane foam composition comprising a polyol and diisocyanate, wherein the flexible polyurethane foam composition contains nanoparticles of precious metals.

In addition, the present invention is a method for producing a flexible polyurethane foam by stirring a polyol and diisocyanate in the presence of a foam stabilizer, a foaming agent, a crosslinking agent and a catalyst, the production of a flexible polyurethane foam comprising the step of adding nanoparticles of a noble metal It includes a method.

Hereinafter, the present invention will be described in detail.

The present invention catalyzes the isocyanate and polyol to produce a flexible polyurethane foam, dispersing the noble metal nanoparticles in advance in a polymeric polyether polyol containing 20 to 60% by weight of the solid content of the polyvinyl compound Secure and mix the polymeric polyether polyol mixed with the nanoparticles according to the physical properties of the final product and the polyether polyol having 0 to 30% by weight of ethylene oxide, 70 to 100% by weight of propylene oxide, and molecular weight of 400 to 7,000. And a method for producing a urethane foam by reacting with an isocyanate in the presence of a blowing agent, a crosslinking agent and a catalyst.

Since the flexible polyurethane foam of the present invention prepared by the above method is directly dispersed in the polyol, the precious metal nanoparticles are distributed in the flexible polyurethane foam, which is a final product, thereby reducing the smell of the polyurethane foam and adding antibacterial properties. You can expect

The vinyl compound includes monomers such as acrylonitrile and styrene.

The precious metal nano metal particles used in the present invention may be used one or a mixture of two or more selected from gold, silver, platinum and the like, the nanoparticles of the precious metal may be used in the range of 10 to 100 nm in diameter, particles If the size is too large, it may be difficult to disperse in the polyol, and the processing of the polyurethane foam becomes difficult.

The noble metal is included in the range of 0.01 to 10.00 parts by weight with respect to 100 parts by weight of the total polyol mixture, if too large it will affect the manufacturability of the foam, the cost tends to rise is not preferable.

As the diisocyanate used in the present invention, aromatic, aliphatic, and cycloaliphatic diisocyanates may be used, and such diisocyanates include, but are not limited to, toluene diisocyanate, 1.6-hexamethylene diisocyanate, isophorone diisocyanate, 2, One selected from 5-bis (isocyanatomethyl) bicyclo [2,2,1] heptane, and 2,6-bis (isocyanatomethyl) bicyclo [2,2,1] heptane or the like or Mixtures of two or more may be used.

The polyol and diisocyanate may have a percentage index of isocyanate equivalent / polyol equivalent in the range of 60 to 130, and preferably in the range of 80 to 110.

The flexible polyurethane foam of the present invention can be produced by the following method.

That is, the method for producing a flexible polyurethane foam of the present invention, in the method for preparing a flexible polyurethane foam by stirring the polyol and diisocyanate in the presence of a foam stabilizer, a foaming agent, a crosslinking agent and a catalyst, the process of adding nanoparticles of precious metal It is configured to include.

The nanoparticles of the noble metal are previously dispersed in a polymeric polyether polyol having a content of 20 to 60% by weight, preferably 20 to 45% by weight, of a vinyl-based compound copolymerized.

Specifically, 0.1 to 99.9% by weight of a polyether polyol having a molecular weight of 400 to 7,000 having a functional group of 2 to 5, an ethylene oxide content of 0 to 30% by weight, and a propylene oxide content of 70 to 100% by weight, as the polyol, 0.1 to 99.9% by weight of a polymeric polyether polyol having a content of 20 to 60% by weight of the copolymer of a vinyl compound is used, and 0.01 to noble metal nanoparticles based on 100 parts by weight of the total polyol mixture in the polymeric polyether polyol. 10.0 parts by weight of the mixture is used beforehand. Blending of the polyol is controlled in the above range in consideration of physical properties. The mixed polyol may include a foam stabilizer, a foaming agent, a crosslinking agent, a catalyst, and the like.

The foam stabilizer may be a silicone foam stabilizer, and commercially available products include, for example, L-580, L-600, L-603, L-3002, L-626, L-627 or Air Products of Chrompton Corporation. DABCO DC-198, DC-5230, DC-5388 or BF-2370, B-4900, B-8002, B-8680 from Degussa, etc., preferably L-626, DC-198, B- 8002 may be used alone or in a mixture, and 0.5 to 3.5% by weight of the total composition may be used, but in the case of a composition having a large amount of pore-forming reaction or blowing agent, the foaming agent may be foamed up to 7.0% by weight.

As the blowing agent, water, methylene chloride, liquid carbon dioxide, n-pentane, hydrogenated chlorofluorocarbons, etc. may be used depending on the purpose and density. It is preferable that the usage-amount of such a foaming agent will be 0.5 to 10 weight% of the whole composition.

The catalyst uses a tin catalyst and an amine catalyst at the same time. The tin catalyst includes tin octylate, dilauric dibutyl tin, and the like, and the amine catalyst includes N- (N ', N'-2-dimethylaminoethyl. ) Morophorin, tri (dimethylaminemethyl) phenol, pentamethyldipropylenetriamine, 1,8-diazabicyclo (5,4,0) undecane-7, 33% triethylene diamine dissolved in dipropylene glycol, And bis (dimethylamino ethyl) ether etc. can be used.

In addition, as additives commonly used in the art as needed, stabilizers, dyes, amine catalysts, antioxidants, and the like may be used to the extent that they can be tolerated within the range not impairing the physical properties of the flexible polyurethane foam of the present invention. The present invention is not limited by the selective use of these additives.

According to the present invention as described above, even by injecting a small amount of uniformly dispersed precious metal nanoparticles, excellent odor reduction and antimicrobial properties are exhibited, and thus can be used for various purposes such as clothing, hygiene products, packaging materials, medical products, and automobile products. You can expect

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited by the following Examples.

Example  1 to 4 and Comparative example  1 to 2

Precious metal nanoparticles were prepared by dispersing the polymer solids copolymerized with acrylonitrile and styrene monomer in a polymer polyether polyol (YUKOL 7730 of Escei's YUKOL 7730) having 45% by weight, and the types and amounts used as shown in Table 1 below. A resin premix composed of polyol, water, a crosslinking agent, a catalyst, a foam stabilizer, and a stabilizer, and a polymer polyol having noble metal nanoparticles dispersed therein was added to the resin premix, and stirred at 5,000 rpm for 60 seconds. The mixture was stirred for 8 seconds at 5,000 rpm to make a flexible polyurethane foam.

Toluene diisocyanate 80 was used as a diisocyanate for Examples 1-2 and Comparative Example 1. In Examples 1 to 3, the kind of the noble metal nanoparticles was changed, and in Example 4, 30 parts by weight of the polymer polyol was introduced to prepare a polyurethane foam, and the reactivity and various properties were evaluated.

Meanwhile, in Comparative Example 1, only polyether polyol was used without noble metal nanoparticles, and in Comparative Example 2, a polyurethane foam was prepared by introducing 30 parts by weight of polymeric polyol without noble metal nanoparticles, and the reactivity and various properties were evaluated.

Experimental Example  : Reactivity and Foam Property Test

In urethane foaming, the reactivity was evaluated by measuring the cream time (second) and rise time (second) with a stopwatch, and the foam stability was determined by visually observing the degree of foam sinking after reaching the maximum height during foaming. In addition, the physical properties such as density, hardness, elasticity, and tensile were measured by ASTM D3574, respectively. The antimicrobial properties were the result of using E. coli by the method of ATCC 25922 [see FIG. 1], and the odor characteristics were ASTM syringe method. It was investigated by the sensory method, each result is shown in Table 1 below.

As shown in Table 1, when comparing Examples 1 to 3 and Comparative Example 1, it can be seen that when the noble metal nanoparticles are used, the smell reduction and antibacterial properties are improved, Example 4 and Comparative Example 2 In comparison, that is, even when using a polymeric polyether polyol, it can be seen that odor reduction and antibacterial properties are exhibited.

In addition, as shown in FIG. 2, the foam without addition of silver nano had a 18% reduction in bacteria (Staphylococcus aureus and Escherichia coli) [Comparative Example 1], whereas the foam with 300 nm of silver nano shown in FIG. It can be confirmed that it is 99.9% [Example 1].

As described above, the flexible polyurethane foam to which the noble metal nanoparticles produced by the method of the present invention has a smell reduction and antibacterial property, thus replacing the urethane foam used for clothing, hygiene products, packaging materials, medical products, automobile products, and the like. I think you can.

Claims (11)

The polyol has a functional group of 2 to 5, an ethylene oxide content of 0 to 30% by weight, a polyether polyol of 0.1 to 99.9% by weight of a polyether polyol having a molecular weight of 400 to 7,000 having a propylene oxide content of 70 to 100% by weight, and a vinyl compound A flexible polyurethane foam composition comprising nanoparticles of polyols, diisocyanates and precious metals containing from 0.1 to 99.9% by weight of polymeric polyether polyols having a solids content of 20 to 60% by weight. The flexible polyurethane foam composition according to claim 1, wherein the precious metal is one or a mixture of two or more selected from gold, silver, and platinum. The flexible urethane foam composition according to claim 1, wherein the nanoparticles of the noble metal are in the range of 10 to 100 nm in diameter. The flexible urethane foam composition according to claim 1, wherein the noble metal is contained in an amount of 0.01 to 10.00 parts by weight based on 100 parts by weight of the total polyol. delete The flexible polyurethane foam composition according to claim 1, wherein the vinyl compound is selected from acrylonitrile, styrene, and mixtures thereof. The diisocyanate of claim 1, wherein the diisocyanate is toluene diisocyanate, 1.6-hexamethylene diisocyanate, isophorone diisocyanate, 2,5-bis (isocyanatomethyl) bicyclo [2,2,1] heptane, and A flexible urethane foam composition, characterized in that one or two or more selected from 2,6-bis (isocyanatomethyl) bicyclo [2,2,1] heptane. The flexible urethane foam composition according to claim 1, wherein the polyol and diisocyanate have a percentage index of an isocyanate equivalent / polyol equivalent in the range of 60 to 130. delete delete In the presence of a foam stabilizer, a foaming agent, a crosslinking agent and a catalyst, Solids obtained by copolymerizing a vinyl compound with 0.1 to 99.9% by weight of a polyether polyol having a molecular weight of 400 to 7,000 having a functional group of 2 to 5, an ethylene oxide content of 0 to 30% by weight, and a propylene oxide content of 70 to 100% by weight. Polyols containing 0.1 to 99.9% by weight of a polymeric polyether polyol having a content of 20 to 60% by weight, Stirring the diisocyanate to produce a flexible polyurethane foam, Method for producing a flexible polyurethane foam, characterized in that the mixture of 0.01 to 10.0 parts by weight of noble metal nanoparticles in advance with respect to 100 parts by weight of the total polyol mixture in the polymeric polyether polyol.

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