JPH0569549B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a composition having an excellent deodorizing effect. (Prior Art) Deodorizing agents made of a combination of an iron compound, an organic acid such as L-ascorbic acid, ethylenediaminetetraacetic acid, alum, etc. have been known. This deodorizing agent is usually used in the form of an aqueous solution, and when used in solid form, its ability can be demonstrated by using it together with a porous filler such as activated carbon and a water-absorbing substance. However, if it is not properly blended and mixed with water-absorbing substances, iron () compounds and
It cannot form chelates well with vinegar-based substances. Therefore, sufficient moisture must be controlled for these compounds to react, but the moisture cannot be sufficiently controlled simply by mixing the above formulations. Examples of water-absorbing substances include hydrophilic polymer substances and deliquescent substances, but when these are used in combination with a deodorizing agent, if they absorb water to the extent that the deodorizing effect can be fully exerted, the deodorizing The entire agent system becomes wet with water and leaks out of the bag during use, contaminating the outside. In addition, in the system of iron () compound and L-ascorbic acid described in JP-A-59-132937 and JP-A-61-106161, the deodorizer changes color after absorbing malodorous substances,
It also has the disadvantage of contaminating the outside. (Problems to be Solved by the Invention) The purpose of the present invention is to constantly provide moisture that allows the deodorizer to fully exhibit its effects, and also to prevent the deodorizer from dissolving with this moisture. The object of the present invention is to provide a composition having an excellent deodorizing effect with no odor. Another object of the present invention is to provide a composition having an excellent deodorizing effect and an extremely fast deodorizing rate. Another object of the present invention is to provide a composition that has an excellent deodorizing effect that does not cause the deodorizing agent to dissolve or change color, and does not contaminate the outside. (Means for Solving the Problems) The present invention relates to a deodorizing composition comprising a hydrophilic polyurethane in which an iron() compound-based deodorizing agent is enclosed in an anionic hydrophilic polyurethane as a carrier. Anionic polyurethane is obtained by reacting an anionic urethane prepolymer with water. The anionic urethane prepolymer can be obtained, for example, by reacting a polyol compound, an isocyanate compound, and an anionic compound. As the polyol compound, various polyfunctional polyether polyols, polyester polyols, and other polyols known in the field of polyurethane production can be used. Examples of polyether polyols include polyethylene glycol, polypropylene glycol, polytetramethylene glycol, etc., and examples of polyester polyols include adipic acid, suberic acid, sebacic acid,
The acid component is an aliphatic dicarboxylic acid having 4 to 20 carbon atoms such as brassylic acid, terephthalic acid, isophthalic acid, etc., and an aliphatic diol having 1 to 6 carbon atoms such as ethylene glycol, propylene glycol, neopentyl glycol, hexamethylene glycol. , ether glycols such as diethylene glycol and dipropylene glycol, spiroglycols, N
- Polyester polyols or polycaprolactone polyols containing N-alkyl dialkanolamines such as methyldiethanolamine as polyol components can be used, and specific examples include polyethylene adipate polyols, polybutylene adipate polyols, polyethylene propylene adipate polyols, etc. Examples include adipate polyols, terephthalic acid polyols (eg, Toyobo Co., Ltd., trade names Vylon RUX, Vylon RV-200L), polycaprolactone polyols (eg, Daicel Chemical, trade names Plaxel 212, Plaxel 220). In addition, other polyols include polysiloxane, polyvinyl alcohol, vinyl acetate copolymer, polycarbonate polyol (for example, West Germany, Bayer AG, trade name Desmofene 2020E),
Examples include polybutadiene polyol (eg, Nippon Soda, trade name G-1000, G-2000, G-3000, Idemitsu Petrochemical, trade name Poly bd R-45HT), polypentadiene polyol, castor oil polyol, and the like. Furthermore, epoxy resins having hydroxyl groups such as bisphenol A type epoxy resins, novolak type epoxy resins, and epoxidized olefin type epoxy resins can also be used. These polyols can be used alone or in combination of two or more. As the isocyanate compound, various known polyfunctional aliphatic, alicyclic, and aromatic isocyanates can be used, such as hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and 4,4-dicyclohexylmethane diisocyanate (HMDI). , 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2,6-TDI), 4,4-
Examples include diphenylmethane diisocyanate (MDI), orthotoluidine diisocyanate (TODI), naphthylene diisocyanate (NDI), xylylene diisocyanate (XDI), and lysine diisocyanate (LDI). Furthermore, in the present invention, a conventional chain extender can also be used if necessary. As a chain extender,
Examples include di- to hexafunctional polyols with a molecular weight of 500 or less and diamines having a primary or secondary terminal amino group with a molecular weight of 500 or less. Suitable chain extenders include (a) ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butanediol, hexanediol,
Polyols such as glycerin, trimethylolpropane, pentaerythritol, sorbitol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, xylylene glycol (b) hydrazine, ethylenediamine, tetramethylenediamine, hexamethylenediamine, 1,
Diamines such as 4-cyclohexanediamine (c) Alkalinolamines such as ethanolamine, diethanolamine and triethanolamine (d) Hydroxine, pyrogallol, 4,4-isopropylidene diphenol, aniline and the above polyols, diamines and polyols with a molecular weight of 500 or less obtained by adding propylene oxide and/or ethylene oxide to alkanolamines in any order. Examples of the anionic compound include compounds that have at least one reactive group active toward isocyanate compounds and also have an anionic group, or modified products thereof. Specific examples include 2,2-dimethylolpropionic acid, 2,3-dihydroxypropionic acid, 2,3-dihydroxy-2-methylpropionic acid, and 2,3-dihydroxy-2-(1-methylethyl)butanoic acid. , 3,11-dihydroxytetradecanoic acid, dihydroxyphenylacetic acid, 3,
4-dihydroxymandelic acid, 9,10-dihydroxyoctadecanoic acid, 2,3-dihydroxybutanedioic acid, 2,3-dihydroxy-2-methylbutanedioic acid, 2,4-dihydroxypentanedioic acid,
2,4-dihydroxy-3-methylpentanedioic acid, 2,5-dihydroxyhexanedioic acid, 9,10
-dihydroxyoctadecanedioic acid, dihydroxytartaric acid, dihydroxyfumaric acid, 2,3-dihydroxy-2-butenedioic acid, 1,2-dihydroxy-1,2,2-tricarboxypropane, 1,3
- Carboxyl group-containing compounds such as polyhydroxypolycarboxylic acids such as dihydroxy-1,3,3-tricarboxypropane, salts thereof, or esters that easily produce acids through reactions such as hydrolysis may also be mentioned. can. Furthermore, specific examples of anionic compounds include polyhydroxysulfones and salts thereof. As a typical example, the general formula

[Chemical formula] (HOR ¹ ) ₂ N-R ³ -SO ₃ M (R ¹ is an alkylene group having 2 to 6 carbon atoms, R ² is hydrogen or an alkyl group having 1 to 5 carbon atoms, R ³ is an organic residue, M is an alkali metal, m is a number from 1 to 3)
Compounds represented by can be mentioned. ^R3
Preferred examples of organic residues include alkylene groups having 1 to 10 carbon atoms, phenylene groups, etc.
Examples include a valent aromatic group, and a group in which an alkylene group and an aromatic group are bonded to each other. Examples of preferred compounds among these are as follows.

[Chemical] 3,5-di(β-hydroxyethoxycarbo)
Sodium benzenesulfonate (DEIS manufactured by Sumitomo Chemical)

[Chemical] (HOCH ₂ CH ₂ ) ₂ N-(CH ₂ ) ₄ -SO ₃ Na

[Deodorization test]

2 g of the foams of each example and comparative example were cut out and used as samples. 0.5 ml of 28% ammonia water was put into a 450 ml wide-mouthed bottle, and a 20 ml beaker containing the sample was added thereto. After 4 hours, the presence or absence of ammonia odor was checked. The results are shown in Table 1. In determining the deodorizing effect, ◎ indicates that the deodorizing effect is particularly good, ○ indicates that the deodorizing effect is excellent, △ indicates that the deodorizing effect is observed but is poor, and × indicates that there is no deodorizing effect.

【table】

Claims (1)

[Scope of Claims] 1. A deodorizing composition comprising a hydrophilic polyurethane in which an iron() compound-based deodorizing agent is enclosed in an anionic hydrophilic polyurethane as a carrier. 2. The deodorizing composition according to claim 1, wherein the anionic polyurethane is a polyurethane containing a carboxyl group or a salt thereof in the molecule. 3 The concentration of carboxyl group or its salt is approximately 0.001
The deodorizing composition according to claim 2, wherein the deodorizing composition is 1.0 milliequivalent/g. 4 When the concentration of carboxyl group or its salt is A milliequivalent/g, the iron () compound is 0.001 x A x B to 1.2 x A x B to B grams of urethane resin.
The deodorizing composition according to claim 2, which contains milliequivalents. 5. The deodorizing composition according to claim 1, wherein the anionic polyurethane is a polyurethane containing 50% by weight or more of ethylene oxide units in its main chain. 6. The deodorizing composition according to claim 1, wherein the iron() compound-based deodorizing agent is an iron() compound alone or a mixture thereof with an organic acid, ethylenediaminetetraacetic acid, or alum.