JP2717209B2 - Liquid deodorant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a deodorant useful for removing various malodors. (Background) Nowadays, people's interest in odors is increasing as the standard of living is improved, and a wide variety of deodorants is on the market. However, there are many types of foul odors, and the odor that is considered to be a single odor is chemically composed of a wide variety of chemical substances, and little is known about the human olfactory physiology. What has a wide deodorant spectrum against various kinds of odors is not yet known. Today, the odor caused by kitchen garbage in urban condominiums is remarkable, and people passing in front of a kitchen garbage in the summer usually stop breathing and pass quickly. Furthermore, in factories handling biological materials, such as food factories and leather factories, foul odors caused by decay of organic components in wastewater pose a pollution problem, and companies have to spend a lot of money to deal with them. (Problems of the prior art) By the way, the odor component which is perceived as an unpleasant odor in a place where humans normally encounter is a nitrogen-containing cyclic compound such as ammonia, aliphatic amines, indole, and skatole, which is generated by the decomposition of proteins by bacteria. And sulfur-containing compounds such as hydrogen sulfide and mercaptans; and lower fatty acids (butyric acid, valeric acid, caproic acid, etc.) produced by microbial decomposition of excreta from sweat glands, sebaceous glands, etc., and their esters and acetoin. can do. Existing deodorants have an effect on nitrogen-containing compounds such as amines, but have no effect on sulfur-containing compounds, or conversely have an effect on the latter but are ineffective on the former. Is common. In addition, they are all poorly effective against malodorous fatty acid components.

[Problems to be solved by the invention]

In view of the above circumstances, the problem to be solved by the present invention is to provide a general-purpose deodorant that exhibits an effective deodorant effect against various types of malodors including various nitrogen compounds, sulfur-containing compounds, and lower fatty acid-based malodor components. It is to provide an odorant.

[Means for Solving the Problems]

(Summary) That is, the present invention provides a liquid deodorant containing a betaine-type amphoteric compound and a ketocarboxylic acid as active ingredients. Hereinafter, the components constituting the composition of the present invention will be described. (Betaine-type amphoteric compound) (1) Betaine-type amphoteric compound (1) suitable for carrying out the present invention)
Is, for example, amidobetaine having a chemical structure represented by the following general formula. (Wherein R is a hydrocarbon residue having 20 or less carbon atoms) or, if desired, an imidazolium compound represented by the following general formula. (In the formula, R ₁ represents a lower alkyl group, and R ₂ represents a C ₈ or higher middle to higher alkyl group.) It is needless to say that the types of ethyne amphoteric compounds that can be used in the present invention are not limited to both. (Organic acidic substance) (2a) As an organic acidic substance (2a) suitable for carrying out the present invention,
Examples thereof include lauric acid, oleic acid, palmitic acid, brioxylic acid, humic acid, and the like, in addition to wood vinegar or various lower and middle fatty acids that are constituents thereof. Since wood vinegar contains lower aliphatic aldehydes and ketones, wood vinegar may be used to contain the carbonyl compound (2b) described below together with the fatty acid (2a). It is desirable that the humic acid has as large a base substitution capacity as possible. (Carbonyl compound) (2b) Examples of the carbonyl compound include crotonaldehyde, aryl aldehyde, cinnamaldehyde, octyl aldehyde, nonyl aldehyde, monovalent aldehyde such as citronellal, divalent aldehyde such as glyoxal, and aromatic such as benzaldehyde. Aliphatic aldehydes, aldehyde alcohols such as glycolaldehyde, glyoxylic acid, lactate aldehyde, aldehyde carboxylic acids such as glucuronic acid and acetone, methyl ethyl ketone, dibutyl ketone, yonones, aliphatic or alicyclic saturated ketones such as acetylacetone, Aromatic ketones such as benzophenone, ketoaldehydes such as methylglyoxal, ketoalcohols such as acetol and dimethylketol, pyruvic acid, Revulin While the ketocarboxylic acid may be exemplified such as, not limited only to the course illustrative ones. (Alkali halides) In general formula, MXO ₃ (wherein M represents an alkali metal and X represents a halogen), those in which the alkali metal is sodium or potassium and the halogen is chlorine, bromine or iodine are commonly used. Is preferably potassium bromate or the like. (Medium) The medium in the present invention is usually water, but ethanol,
Lower alcohols such as isopropanol can also be used, and lower alcohols are particularly suitable for aerosol preparations.
In addition, as a propellant for an aerosol formulation, methane, fluorinated chloride of ethane, for example, Freon 11, 12, 114, etc. (registered trademark), lower aliphatic hydrocarbons, carbon dioxide, nitrogen, argon, etc. are used. Freon is preferred to avoid its use because ozone depletion is a problem. (Other additives) Dyes, fragrances, nonionic surfactants and the like are used as desired. Since some of the carbonyl compounds are aromatic, it is not necessary to add a fragrance in that case. Nonionic activators (eg, polyoxyethylene nonyl phenyl ether, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, polyglycerol fatty acid ester, etc.) may be used to solubilize water-insoluble materials such as fatty acids. However, since the betaine-type amphoteric compound as the main ingredient itself has a surface-active effect, even if used, the amount may be small. (Blending) Depending on the purpose, the blending ratio of each component in the present invention is one or more of betaine-type amphoteric compound (1) ... 1 to 90% by weight of organic acidic substance, carbonyl compound and alkali halide (2) ... 1 to 90% by weight Liquid medium (remainder): The total amount can be changed within a range of 100% by weight. In general, however, it is preferable to mix the component (2) in a half amount or less with respect to the component (1). As will be described later in the section of action, the main use of the deodorant of the present invention is due to a chemical reaction with a malodorous component. Therefore, the smaller the absolute amount of the main agent, the lower the deodorant effect.

[Action]

Typical malodorous components such as hydrogen sulfide, mercaptan, organic carboxylic acid, amonia and amines dissociate as follows. (R means a residue of mercaptan, carboxylic acid and amine.) In each of these malodorous components, SH ^- and RCOO ^- are attracted to the (+) charged portion of the amphoteric compound (1), and furthermore, ▲ NH ⁺ ₄
▼ and ▲ RNH ^- ₃ ▼ are attracted to the (−) charged portion of compound (1), and lose their respective activities. However, the reaction equivalent of the betaine-type amphoteric compound alone is small, but if this compound is mixed with a carbonyl compound that is not contraindicated with the compound at an appropriate ratio, asmonia and amine cause the following addition reaction with the carbonyl compound. A synergistic deodorant effect is exhibited. When an amphoteric compound and an acidic organic substance such as humic acid or wood vinegar coexist, amines, ammonia, hydrogen sulfide, and the like can be more effectively removed. Furthermore, in places where hydrogen sulfide such as sewage, mercaptans, ammonia and amines coexist and are weakly acidic, alkali halides coexist to convert mercaptan into disulfide and ammonia or amine into ammonium halide. , So that a stubborn odor that is difficult to deodorize can be reliably removed.

【Example】

Hereinafter, embodiments and effects of the invention will be described with reference to examples. However, the examples are of course for explanation, and do not limit the inclusion and extension of the invention idea. Example 1 Water was added to 10 parts by weight of amidobetaine (trade name: N, N-dimethyl-N-dodecanoylaminopropylglycine), 5 parts of glyoxylic acid and 0.1 part of pyruvic acid, and the total amount was 100 parts. As a result, an inventive deodorant was obtained. After putting the above deodorants in a polybag of capacity 3 each with ammonia, methylamine, hydrogen sulfide and acetic acid at a concentration of 30 to 50 ppm each as a sample together with air, 2 g of the above deodorant was added to each. The change over time in the concentration of each sample was measured. It should be noted that a Kitagawa type detector tube was used for this measurement, and a careful gas chromatography was performed to confirm that there was a correlation between the two. The results are shown in FIGS. In addition, it was confirmed that the deodorant of this example had a remarkable effect even when applied to toilets, kitchen waste, and fish spoilage. Example 2 2-Undecyl-N-carboxymethyl-N-imidazolium betaine (N-acetylimidazole-N-
10 parts of (2-undecyl) acetic acid), 5 parts of glyoxal and 2 parts of coconut oil fatty acid were dissolved in a total of 100 parts with water together with a small amount of polyoxyethylene nonylphenyl ether. The deodorant of this example also showed the same effect as that of Example 1. Example 3 Water was added to 10 parts of amidobetaine (described above) and 5 parts of potassium bromate and dissolved in a total amount of 100 parts. 5ml of this deodorant is used in food factory sewage (hydrogen sulfide concentration 50pp
m) When put into a plastic bag of capacity 3 containing 100 m and subjected to a sensory test with stirring, the noticeable smell of hydrogen sulfide completely disappeared after 5 minutes, and the concentration was reduced to 0.1 ppm or less. Was.

【The invention's effect】

As described above, the present invention can provide a general-purpose deodorant exhibiting an effective deodorizing effect against various types of odors, thereby contributing not only to consumer use but also to reducing odor pollution. Can.

[Brief description of the drawings]

1 to 4 are graphs showing changes over time of various odor sources by the deodorant of Example 1.

Claims (3)

(57) [Claims] A liquid deodorant comprising a betaine-type amphoteric compound and a ketocarboxylic acid as active ingredients. 2. A betaine-type amphoteric compound represented by the general formula: The deodorant according to claim 1, having a structural formula: wherein R is a hydrocarbon residue having 20 or less carbon atoms. 3. A betaine-type amphoteric compound represented by the general formula: (Wherein R ₁ represents a lower alkyl group and R ₂ represents a C ₈ or higher middle to higher alkyl group.) The deodorant according to claim 1, which has the following structural formula.