New rubber odor reduction deodorant

Abstract

To provide a novel rubber odor-reducing deodorant that can effectively reduce and eliminate rubber odor, and a deodorizing exhaust duct using the same. [Solution] The deodorant according to the present invention is used to reduce rubber odor and is characterized in that it contains a polyamine compound, preferably a linear polyamine compound, as a deodorant component. Furthermore, the deodorant waste exhaust duct 1 according to the present invention is composed of an exhaust duct 11, a sprayer 12 having a tank section 12a containing the rubber odor-reducing deodorant and a spray section 12b for spraying the rubber odor-reducing deodorant contained in the tank section, and the spray nozzle of the spray section is installed inside the exhaust duct.

Description

Technical Field

[0001] The present invention relates to a novel deodorant for reducing rubber odor. Specifically, it relates to a novel deodorant for reducing rubber odor that can effectively reduce and remove the rubber odor emitted from rubber raw materials and rubber products through various processes such as rubber processing and combustion.

Background Art

[0002] In factories where processes such as the kneading process and vulcanization process of rubber such as natural rubber and synthetic rubber, the manufacturing process of rubber products such as tires and rubber molded products, the incineration treatment of waste tires, etc., and the regeneration process of carbon black (dry distillation process of tires) are carried out, or in storage facilities and warehouses for rubber products and rubber raw materials, a so-called rubber odor that gives people discomfort will occur. It is known that such rubber odor consists of odor components such as sulfur compounds, lower fatty acids, and aldehydes.

[0003] When rubber odor occurs, it is necessary to forcibly discharge the rubber odor outdoors through an exhaust duct in order to deteriorate the indoor environment and working environment in the factory or warehouse.

[0004] On the other hand, in this case, the rubber odor discharged from the factory or warehouse to the outside will cause deterioration of the surrounding environment (odor pollution), and particularly often cause troubles with surrounding residents and surrounding facilities.

[0005] The demand for technologies for reducing or removing such rubber odor is high, and various technologies have been developed.

[0006] For example, Patent Documents 1 to 2 disclose a rubber odor deodorizing composition containing a hydrazide compound such as carbohydrazide or adipic acid dihydrazide, and pine oil and / or limonene, and a deodorizing method using the same.

[0007] Furthermore, Patent Document 3 discloses a method for deodorizing rubber, which specifically includes the step of reacting odor components with a mixture of a betaine-related compound and a sulfonate (A), and an amphoteric high molecular weight polyacrylamide (co)polymer (B).

[0008] [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Patent No. 6733066 [Patent Document 2] Patent No. 6733067 [Patent Document 3] Japanese Patent Publication No. 2012-180420 [Overview of the project] [Problems that the invention aims to solve]

[0010] As a result of diligent research, the inventors have discovered that, although the details of the reaction mechanism leading to deodorization of the odor components of rubber (sulfur compounds, lower fatty acids, aldehydes) remain unclear, using polyamine compounds as deodorizing components can significantly reduce or eliminate rubber odor, thus completing the present invention.

[0011] In other words, the present invention aims to provide a rubber odor reducing deodorant that can effectively reduce and remove rubber odor. [Means for solving the problem]

[0012] The rubber odor-reducing deodorant, deodorizing waste exhaust duct, and facility according to the present invention are as follows.

[0013] [1] A deodorant for reducing rubber odor, characterized by containing a polyamine compound as a deodorizing component.

[0014] The deodorant for reducing rubber odor according to [1], wherein the polyamine compound is a linear polyamine compound.

[0015] The deodorant for reducing rubber odor according to [1], wherein the polyamine compound has three or more amino groups.

[0016] The deodorant for reducing rubber odor according to [1], wherein the polyamine compound is a linear polyamine compound and has an amino group in the side chain.

[0017] It is composed of an exhaust duct, a tank part containing the deodorant for reducing rubber odor according to any one of [1] to [4], and a spray part for spraying the deodorant for reducing rubber odor contained in the tank part. The deodorized waste exhaust duct, wherein the spray port of the spray part is installed inside the exhaust duct.

[0018] The deodorized waste exhaust duct according to [5], wherein a plurality of baffle plates are provided inside the exhaust duct.

[0019] A facility equipped with the deodorized waste exhaust duct according to [5] or [6].

Effect of the Invention

[0020] According to the deodorant for reducing rubber odor according to the present invention, the rubber odor can be effectively reduced and removed.

Brief Description of the Drawings

[0021] [Figure 1] FIG. 1 is a diagram for showing an embodiment of the deodorized exhaust duct according to the present invention.

[0022] [Figure 2] FIG. 2 is a diagram for showing an embodiment of the deodorized exhaust duct according to the present invention, in which a plurality of baffle plates are provided inside the exhaust duct.

[0023] [Figure 3]Figure 3(A) is a diagram illustrating a facility (factory) equipped with the deodorizing exhaust duct according to the present invention. Figure 3(B) is a diagram illustrating a facility (factory) equipped with the deodorizing exhaust duct according to the present invention, along with a sprinkler that sprays a deodorizer for reducing rubber odor. [Modes for carrying out the invention]

[0024] The following will describe in detail the rubber odor-reducing deodorant, the deodorizing exhaust duct, and the facilities having them according to the present invention, with reference to the drawings as appropriate.

[0025] The rubber odor reducing deodorant according to the present invention is characterized by containing a polyamine compound as a deodorizing component, and may contain other components as needed. Furthermore, the rubber odor reducing deodorant according to the present invention is not particularly limited as long as it is used for reducing or removing rubber odor, and may be used to reduce or remove odors generated in various processes such as the mixing and vulcanization processes of rubber such as natural rubber and synthetic rubber, and the manufacturing processes of rubber products such as tires and rubber molded products, or to reduce or remove odors generated in the incineration of tires and the recycling process of carbon black (carbon distillation process of tires). Furthermore, the place of use is not particularly limited, but examples include factories that manufacture rubber products or incinerate or carbonize rubber products, storage facilities for rubber raw materials and storage warehouses for rubber products.

[0026] The polyamine compound, which is the deodorizing component of the rubber odor-reducing deodorant according to the present invention, refers to an aliphatic hydrocarbon having two or more amino groups bonded to it, and may have substituents, may be a salt such as a phosphate or hydrochloride, or may be a hydrate.

[0027] Furthermore, examples of polyamine compounds include linear polyamines and cyclic polyamines, and the deodorizing component may be a linear polyamine and / or a cyclic polyamine. Polyamine compounds can be obtained, for example, by manufacturing using known methods, or they can be obtained from commercially available products.

[0028] Here, examples of linear polyamines include 1,5-pentanediamine (cadaverine), 1,5-pentanediamine dihydrochloride (cadaverine dihydrochloride), 1,4-butanediamine (putrescine), 1,4-butanediamine dihydrochloride, N 1 -(3-aminopropyl)butane-1,4-diamine phosphate (spermidine phosphate), N-(3-aminopropyl)-1,4-butanediamine hexahydrate phosphate, N,N'-bis(3-aminopropyl)-1,4-butanediamine phosphate hexahydrate, N,N'-bis(3-aminopropyl)-1,4-butanediamine tetrahydrochloride, N-propyl-1,4-butanediamine dihydrochloride, 2,2'-diaminodiethylamine, N,N'-di(2-aminoethyl)ethylenediamine, N,N'-bis(2-aminoethyl)-1,3-propanediamine Examples include N,N'-bis(3-aminopropyl)ethylenediamine, bis(hexamethylene)triamine, 3,3'-diaminodipropylamine, N,N'-dimethyl-1,3-propanediamine, ethylenediamine, ethylenediamine monohydrate, ethylenediamine dihydrochloride, trimethylenediamine, trimethylenediamine dihydrochloride, hexamethylenediamine, hexamethylenediamine dihydrochloride, heptamethylenediamine, octamethylenediamine, decamethylenediamine, undecamethylenediamine, and dodecamethylenediamine.

[0029] [ka]

[0030] [ka]

[0031] [ka]

[0032] Examples of cyclic polyamines include piperazine, piperazine hexahydrate, piperazine dihydrochloride, piperazine dihydrochloride monohydrate, piperazine phosphate monohydrate, piperazine malate, piperazine adipate, piperazine citrate, 1,4,7-triazacyclononane octahydro-1H-1,4,7-triazonine, 1,4,7-triazacyclononane trihydrochloride, 1,4,8,12-tetraazacyclopentadecane, 1,4,8,11-tetraazacyclotetradecane, 1,4,7,10-tetraazacyclododecane, and 1,4,7,10-tetraazacyclododecane tetrahydrochloride.

[0033] [ka]

[0034] From the standpoint of having a high deodorizing effect on rubber odor, linear polyamine compounds are preferred. Furthermore, even with linear polyamine compounds, the shorter the main chain (aliphatic hydrocarbon skeleton), the better the reactivity with aldehyde compounds, which are components of the rubbery odor.

[0035] Furthermore, while the number of amino groups in a single molecule of a polyamine compound is not particularly limited (as long as the number of amino groups is two or more, it is not particularly limited), from the viewpoint of having a high deodorizing effect on rubber odor, it is preferable that the polyamine compound has three or more amino groups in a single molecule.

[0036] Examples of polyamine compounds having three or more amino groups include N 1Examples include -(3-aminopropyl)butane-1,4-diamine phosphate (spermidine phosphate), N-(3-aminopropyl)-1,4-butanediamine hexahydrate phosphate, N,N'-bis(3-aminopropyl)-1,4-butanediamine phosphate hexahydrate, N,N'-bis(3-aminopropyl)-1,4-butanediamine tetrahydrochloride, N-propyl-1,4-butanediamine dihydrochloride, 2,2'-diaminodiethylamine, N,N'-di(2-aminoethyl)ethylenediamine, N,N'-bis(2-aminoethyl)-1,3-propanediamine, N,N'-bis(3-aminopropyl)ethylenediamine, bis(hexamethylene)triamine, and 3,3'-diaminodipropylamine.

[0037] Furthermore, bis(hexamethylene)triamine is preferable because it is expected to have a high rubber odor-eliminating effect and is also highly safe for human use.

[0038] Furthermore, in linear polyamine compounds, the molecule may have an amino group at the end of the main chain or as a side chain.

[0039] From the viewpoint of having a high deodorizing effect on rubber odor, it is desirable that the polyamine compound is a linear polyamine compound and has an amino group in its side chain. Such a polyamine compound is N 1 Examples include -(3-aminopropyl)butane-1,4-diamine phosphate (spermidine phosphate), N-(3-aminopropyl)-1,4-butanediamine hexahydrate phosphate, N,N'-bis(3-aminopropyl)-1,4-butanediamine phosphate hexahydrate, N,N'-bis(3-aminopropyl)-1,4-butanediamine tetrahydrochloride, N-propyl-1,4-butanediamine dihydrochloride, 2,2'-diaminodiethylamine, N,N'-di(2-aminoethyl)ethylenediamine, N,N'-bis(2-aminoethyl)-1,3-propanediamine, N,N'-bis(3-aminopropyl)ethylenediamine, bis(hexamethylene)triamine, 3,3'-diaminodipropylamine, and N,N'-dimethyl-1,3-propanediamine.

[0040] The rubber odor-reducing deodorant of the present invention is typically dissolved or dispersed in an aqueous medium together with a polyamine compound. The aqueous medium is not particularly limited, but examples include water, lower alcohols having 1 to 6 carbon atoms (such as ethanol), or mixtures thereof. As for the water, distilled water, tap water, industrial water, ion-exchanged water, deionized water, pure water, electrolyzed water, etc., can be used.

[0041] In addition to polyamine compounds and aqueous media, deodorants for reducing rubber odor may also contain surfactants. The surfactant is not particularly limited; it may be either anionic or nonionic surfactant, or a combination of both.

[0042] Examples of anionic surfactants include higher alcohol sulfates, linear alkylbenzene sulfons, alpha-olefin sulfons, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl sulfosuccinates, and dialkisulfosuccinates.

[0043] Examples of nonionic surfactants include polyoxyalkylene styrene-derived phenyl ether, polyoxyalkylene lauryl ether, polyoxyalkylene decyl ether, polyoxyethylene fatty acid ester, and polyoxyalkylene isodecyl ether.

[0044] The polyamine compound content is preferably 0.001 to 10 parts by weight, and more preferably 0.01 to 5 parts by weight, per 100 parts by weight of aqueous medium.

[0045] The method of using the rubber odor-reducing deodorant of the present invention is not particularly limited, but for example, the rubber odor-reducing deodorant may be sprayed or sprayed on or near the source of the rubber odor using a sprayer or sprinkler. Alternatively, the rubber odor-reducing deodorant may be soaked into a cloth and used to wipe or coat the source of the rubber odor or its vicinity.

[0046] Furthermore, it is preferable to use it in exhaust ducts that discharge rubber odor from inside facilities such as factories and warehouses to the outside. Specifically, as shown in Figure 1, number 1, it is preferable to use it as a deodorizing waste exhaust duct.

[0047] Here, the deodorizing waste exhaust duct according to the present invention, as shown in Figure 1, is composed of an exhaust duct 11, a tank section 12a containing a rubber odor-reducing deodorant (filled with a rubber odor-reducing deodorant), and a sprayer 12 having a spray section 12b that sprays the rubber odor-reducing deodorant contained in the tank section 12a. Here, the spray section 12b is installed inside the exhaust duct 11. That is, as shown in the numbered F in Figure 1, rubber odor flows from the duct inlet En to the duct outlet Ex from the reactor or kneader directly or nearby inside the exhaust duct, and the rubber odor-reducing deodorant 12c is sprayed from the spray nozzle of the spray section 12b into the flow path of the rubber odor.

[0048] Furthermore, from the viewpoint of significantly improving the deodorizing effect, it is preferable that baffles are provided inside the exhaust duct, as shown in Figure 2, number 14, and it is even more preferable that multiple such baffles are provided.

[0049] Furthermore, when the deodorizing exhaust duct according to the present invention is installed in a recycled carbon black plant (factory), it is preferable to install a filter inside the exhaust duct, as shown in Figures 1-2, number 13, in order to capture the scattered carbon black. This configuration significantly improves the deodorizing effect. While known filters can be used, nonwoven fabric filters, filter cloths, mesh filters, etc., can be used as appropriate. Among these, aerosol collection filters with a mesh size of 100 μm are preferred.

[0050] Furthermore, as shown in Figure 3(A), the facility according to the present invention is equipped with a deodorizing waste exhaust duct 16 near the reactor 15 and other sources of rubber odor, thereby reducing or preventing odor pollution caused by the diffusion of rubber odor to the outside (surrounding environment). Facilities that can be equipped with the deodorizing waste exhaust duct include factories, storage facilities, and warehouses, but research institutes and development facilities can also be used. In addition, as shown in Figure 3(B), it is preferable to have a sprinkler 17 that sprays a deodorizing agent for reducing rubber odor in addition to the deodorizing waste exhaust duct 16. [Examples]

[0051] The following describes the rubber odor-reducing deodorant according to the present invention in detail with reference to examples, but the technical scope of the present invention is not limited by these examples.

[0052] 1. Preparation of test deodorizer Test deodorant 1 was prepared by stirring 500g of distilled water and 0.04g of bis(hexamethylene)triamine (manufactured by Tokyo Chemical Industry Co., Ltd.), a deodorizing component, in a beaker. Test compositions 2 to 12 were prepared in the same manner as test deodorant 1, except that the type and / or amount of deodorizing components were changed as shown in Table 1. The obtained test deodorizers 1 to 12 were injected into the atomizer's tank and subjected to the evaluation test described later.

[0053] [Table 1]

[0054] [ka]

[0055] 2. Evaluation Test (1) Rubber odor test 1 100g of powdered rubber, obtained by rolling-crushing waste tires (main component: natural rubber), was placed in a glass gas collecting bottle with a lid, and a test deodorizer was sprayed twice with an atomizer before the lid was closed. After spraying, the solution was left for one hour, and then 30 testers removed the lid from the gas collection bottle, smelled the inside of the bottle, and evaluated it based on the following criteria.

[0056] For Comparative Example 1, "Rubber Odor Test 1" was conducted in the same manner, except that distilled water was used instead of the test deodorant. For Comparative Example 2, "Rubber Odor Test 1" was conducted in the same manner, except that neither the test deodorant nor distilled water was sprayed.

[0057] [Evaluation Criteria] ◎: More than 15 testers rated that there was absolutely no rubbery smell. ○: More than 15 testers evaluated that there was almost no rubbery smell. △: More than 15 testers rated the product as having a slight rubbery odor. ×: More than 15 testers rated the rubbery smell as being noticeable.

[0058] (2) Rubber odor test 2 50 kg of powdered rubber, obtained by rolling crushing waste tires (main component: natural rubber), was placed in a carbonization furnace and heated at 500 degrees Celsius for 2 hours. The generated gas was then collected in a glass gas collection bottle with a lid, and a test deodorizer was sprayed twice with an atomizer before the lid was closed. After spraying, the solution was left for one hour, and then 30 testers removed the lid from the gas collection bottle, smelled the inside of the bottle, and evaluated it based on the following criteria.

[0059] Furthermore, as Comparative Example 1, "Rubber Odor Test 2" was conducted in the same manner, except that distilled water was used instead of the test deodorant. Also, as Comparative Example 2, "Rubber Odor Test 2" was conducted in the same manner, except that neither the test deodorant nor distilled water was sprayed.

[0060] [Evaluation Criteria] ◎: More than 15 testers rated that there was absolutely no rubbery smell. ○: More than 15 testers evaluated that there was almost no rubbery smell. △: More than 15 testers rated the product as having a slight rubbery odor. ×: More than 15 testers rated the rubbery smell as being noticeable.

[0061] (3) Rubber odor test 3 50 kg of powdered rubber, obtained by rolling crushing waste tires (main component: natural rubber), was placed in a carbonization furnace and heated at 500 degrees Celsius for 2 hours. Recycled carbon black (rCB) was prepared at the bottom of the furnace. Next, 100 g of the obtained recycled carbon black was placed in a glass gas collecting bottle with a lid, and a test deodorizer was sprayed twice with an atomizer before the lid was closed. After spraying, the solution was left for one hour, and then 30 testers removed the lid from the gas collection bottle, smelled the inside of the bottle, and evaluated it based on the following criteria.

[0062] For Comparative Example 1, "Rubber Odor Test 3" was conducted in the same manner, except that distilled water was used instead of the test deodorant. For Comparative Example 2, "Rubber Odor Test 3" was conducted in the same manner, except that neither the test deodorant nor distilled water was sprayed.

[0063] [Evaluation Criteria] ◎: More than 15 testers rated that there was absolutely no rubbery smell. ○: More than 15 testers evaluated that there was almost no rubbery smell. △: More than 15 testers rated the product as having a slight rubbery odor. ×: More than 15 testers rated the rubbery smell as being noticeable.

[0064] Table 2 shows the evaluation results for rubber odor tests 1 to 3.

[0065] [Table 2] [Industrial applicability]

[0066] According to the present invention, a novel rubber odor-reducing deodorant that can effectively reduce and remove rubber odor, and a deodorizing exhaust duct using the same can be provided. Therefore, the present invention will contribute to the development of industries such as the rubber industry. [Explanation of Symbols]

[0067] 1: Deodorizing waste exhaust duct according to the present invention 2: Deodorizing exhaust duct equipped with a baffle according to the present invention 11: Exhaust duct 12: Sprayer 12a: Tank section 12b: Spray part 12c: Deodorizer for reducing rubber odor sprayed from the nozzle. 13: Filter 14: Baffle 15: Reactor (source of rubber odor) 16: Deodorizing waste exhaust duct according to the present invention installed in a facility 17: Sprinkler En: Exhaust duct inlet Ex: Exhaust duct outlet F: Flow path for rubber odor

Claims

1. A deodorant for reducing rubber odor, characterized by containing a polyamine compound as a deodorizing component.

2. The rubber odor reducing deodorant according to claim 1, characterized in that the polyamine compound is a linear polyamine compound.

3. The rubber odor reducing deodorant according to claim 1, characterized in that the polyamine compound has three or more amino groups.

4. The rubber odor reducing deodorant according to claim 1, characterized in that the polyamine compound is a linear polyamine compound and has an amino group in its side chain.

5. The device comprises an exhaust duct, a tank containing a rubber odor-reducing deodorant according to any one of claims 1 to 4, and a sprayer having a spraying section for spraying the rubber odor-reducing deodorant contained in the tank, A deodorizing waste exhaust duct characterized in that the spray nozzle of the spraying unit is installed inside the exhaust duct.

6. The deodorizing waste exhaust duct according to claim 5, characterized in that a baffle is provided inside the exhaust duct.

7. A facility equipped with a deodorizing waste exhaust duct as described in claim 5 or 6.

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