JPH0647002B2 - Deodorant, deodorant composite material, deodorant resin composition, deodorant resin molding, and deodorant foam - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorant, a deodorant composite material, a deodorant resin composition and a deodorant resin molded article, and more specifically, a deodorant having an excellent deodorant property, The present invention relates to a deodorant composite material, a deodorant resin composition, a deodorant resin molded product, and a deodorant foam which are derived from this.

(Prior Art) It has been conventionally known that an aliphatic polycarboxylic acid such as citric acid or oxalic acid or a salt thereof is effective as a removing agent for basic malodor such as ammonia or amine (Japanese Patent Laid-Open No. Sho 61-61).
137565, JP-A-61-1154673), and
It has been reported that these compounds are blended with a thermoplastic resin to obtain a deodorant resin composition (JP-A-61-209).
662). However, these aliphatic polycarboxylic acids and deodorizing resin compositions containing them have a problem in that they have insufficient deodorizing properties against malodorous components other than the basic malodorous components.

(Problems to be Solved by the Invention) As a result of intensive research to solve the above problems, the present inventors used not only a basic or malodorous carboxylic acid anhydride of a chain or alicyclic group, It was found that a deodorant having excellent deodorizing property of hydrogen sulfide can be obtained, and by adding it to a thermoplastic resin, a deodorizing resin composition having excellent deodorizing property can be obtained, and the present invention is based on this finding. It came to completion.

(Means for Solving the Problems) Thus, according to the present invention, a deodorant comprising an anhydride of a chain or alicyclic carboxylic acid as an active ingredient, and a deodorant composite obtained by containing the deodorant in a base material. Provided are a material, a deodorizing resin composition obtained by blending a thermoplastic resin with the above deodorizing agent, and a deodorizing resin molded article and a deodorizing foam formed by processing the composition.

The chain or alicyclic carboxylic acid anhydride used in the present invention is an acid anhydride derived from a chain or alicyclic monocarboxylic acid or polycarboxylic acid, or a compound having a structure equivalent thereto. However, it is not limited by the synthesis method.

Specific examples of acid anhydrides derived from chain monocarboxylic acids include butyric anhydride, propionic anhydride, lauric anhydride, and the like, specific examples of acid anhydrides derived from alicyclic monocarboxylic acids, Cyclohexanecarboxylic acid anhydride and the like, specific examples of the acid anhydride derived from the chain polycarboxylic acid, succinic anhydride, methylsuccinic anhydride, glutaric anhydride, maleic anhydride, citraconic anhydride, itaconic anhydride, For example, an acrylic acid-based polymer having acid anhydride cross-linking such as polyacrylic acid anhydride, a specific example of an acid anhydride derived from an alicyclic polycarboxylic acid,
Examples thereof include 1,2-cyclohexanedicarboxylic acid anhydride and 3-methyl-Δ ⁴ -tetrahydrophthalic anhydride, but are not limited thereto.

Further, as a compound having a structure equivalent to an acid anhydride derived from a chain or alicyclic polycarboxylic acid, α, β-
Examples thereof include Diels-Alder reaction type addition reaction products of unsaturated dicarboxylic acid anhydrides and olefins and their derivatives.

The acrylic acid-based polymer having an acid anhydride cross-linking used in the present invention may be one that forms an acid anhydride group structure in the same molecule or between different molecules of the acrylic acid-based polymer, for example, It can be obtained by performing a heat dehydration reaction between two carboxyl groups, but is not limited by the synthetic method.

In the present invention, the acrylic acid-based polymer means a homopolymer of α, β-unsaturated carboxylic acid or a copolymer of α, β-unsaturated carboxylic acid and a monomer copolymerizable therewith.
Specific examples of the α, β-unsaturated carboxylic acid include, but are not limited to, acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid and the like. The monomer copolymerizable with α, β-unsaturated carboxylic acid is not particularly limited, but specific examples include, for example, methyl methacrylate, ethyl acrylate, butyl methacrylate,
(Meth) acrylic acid esters such as 2-ethylhexyl acrylate; aromatic monoolefins such as styrene and α-methylstyrene; unsaturated nitriles such as acrylonitrile and methacrylonitrile; vinyl acetate, vinyl caproate And the like; aliphatic diolefins such as butadiene and isoprene; unsaturated acid amides such as acrylamide and N-methylol acrylamide.

The method for obtaining the acrylic acid-based polymer used in the present invention is not particularly limited, and known polymerization methods such as emulsion polymerization and solution polymerization can be applied.

The amount of the acid anhydride group contained in the acrylic acid-based polymer having the acid anhydride cross-linking used in the present invention is not particularly limited, but usually 1 mol% of all monomer units constituting the acrylic acid-based polymer. Or more, preferably 5 mol% or more. If this amount is excessively small, the amount of the deodorant compounded with respect to the thermoplastic resin becomes too large, which causes a problem in the shape of the thermoplastic resin molded product.

The molecular weight of the acrylic acid-based polymer used in the present invention is not particularly limited, but is usually 500 to 500,000.
It is 0, preferably 1,000 to 300,000.

Examples of the Diels-Alder reaction type addition reaction product of α, β-unsaturated dicarboxylic acid anhydride and olefin used in the present invention include α, β-unsaturated dicarboxylic acid anhydride and diolefins. Products of Diels-Alder reaction, and products of ene addition reaction of α, β-unsaturated dicarboxylic acid anhydride with olefins (for this ene addition reaction, edited by Minoru Imoto, "Lecture Organic Reaction Mechanism", Volume 5) "Addition reaction" (written by Minoru Imoto and Niichiro Tokura) and described on pages 308 to 316 of Tokyo Kagaku Dojinsha Co., Ltd.), but the invention is not limited thereto.

Specific examples of the α, β-unsaturated dicarboxylic acid anhydride used in the Diels-Alder reaction type addition reaction include maleic anhydride, itaconic anhydride, and citraconic anhydride. Of these, maleic anhydride is preferred from the viewpoints of reactivity and economy.

The diolefins which are used in the Diels-Alder reaction type addition reaction and undergo the Diels-Alder reaction with the α, β-unsaturated dicarboxylic acid anhydride are not particularly limited, and specific examples thereof include butadiene. ,
Chain conjugated diolefins such as isoprene and piperylene; aliphatic trienes such as 1,3,5-hexatriene; cyclic conjugated polyolefins such as cyclopentadiene, 1,3-cyclohexadiene and cyclooctatetraene Saturated olefins; aromatic compounds such as styrene, indene, naphthalene and the like can be mentioned. Other diolefins include MC Cretzell et al., "Organic Reactions" Vol. 4, Vol.
The compounds described on page 60 (John Willie & Sons) can be mentioned.

It is used in the Diels-Alder reaction type addition reaction. The olefins that undergo the ene addition reaction with the α, β-unsaturated dicarboxylic acid anhydride are not particularly limited, but include propylene, isobutene, 1-butene, 2-butene, 1-pentene, 2-pentene, and 2 -Methyl-1-butene, 2-methyl-2-butene, 1-hexene, 2,
2,4-trimethyl-1-pentene, 2,2,4-trimethyl-2-pentene, 1-decene, 1-octadecene, lower monoolefins (for example, ethylene and propylene) are polymerized using a Ziegler catalyst or the like. Chain-like mono-olefins such as various α-olefins obtained by the above; cyclic mono-olefins such as cyclopentene, cyclohexene, cyclooctene; chain-like such as 1,4-pentadiene and 1,4-cyclohexadiene Cyclic non-conjugated diolefins; higher unsaturated fatty acids such as oleic acid and the like can be mentioned.

In addition, one or more hydrogen atoms of these compounds may be substituted with, for example, an alkyl group or a phenyl group.

The derivative of the Diels-Alder reaction type addition reaction product of the α, β-unsaturated dicarboxylic acid anhydride and the olefin used in the present invention does not define the synthesis method thereof, and the α, β-unsaturated derivative is not defined. Any compound having a structure derived from a Diels-Alder reaction type addition reaction product of a saturated dicarboxylic acid anhydride and an olefin by a known reaction may be used. Specific examples thereof include a hydrogenated product of a Diels-Alder reaction type addition reaction product of an α, β-unsaturated dicarboxylic acid anhydride and an olefin.

The deodorant of the present invention may contain not only one type of chain or alicyclic carboxylic acid anhydride but also two or more types in combination.

In addition, the deodorant of the present invention may optionally contain an existing deodorant, a bactericide, an antifungal agent, etc., as long as it does not impair the effect, and further, a pigment, a colorant, and a stabilizer. Various additives such as agents and antioxidants may also be included.

The deodorant of the present invention can be used alone in various forms, for example, in the form of a solution, powder, tablet or the like, or can be contained in various base materials to form a deodorant composite material.

The substrate used in the deodorant composite material of the present invention is not particularly limited as long as it can be contained by a method such as impregnation, coating, and carrying of the deodorant of the present invention, and specific examples thereof include paper, Examples thereof include cloth, foamed sheet, pulp, fiber, activated carbon, alumina, silica gel, zeolite, clay, bentonite, diatomaceous earth and acid clay. The shape of the base material is not particularly limited, and examples thereof include powder, granules, fibers, and sheets.

In the deodorant composite material of the present invention, the amount of the deodorant contained in the base material is different depending on the purpose, but is usually 0.1 to 30% by weight, preferably 1 to 20% by weight based on the base material. is there. If the amount used is too small, the function may be insufficient, and if it is excessively large, the economy may be poor.

A deodorant resin composition is obtained by blending the deodorant of the present invention with a thermoplastic resin, which is useful as a raw material for a deodorant resin molded article.

The thermoplastic resin used in the present invention may be any as long as it can be formed into a film, a sheet, a fiber, a foam, other various molded articles, and the like, and specific examples thereof include polyethylene, polypropylene, polybutadiene and the like. Polyolefins; polyvinyl compounds such as polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polystyrene, acrylonitrile-butadiene-styrene copolymers, vinyl chloride-vinyl acetate copolymers, ethylene-vinyl acetate copolymers; styrene-isoprene Block copolymers of aromatic vinyl compounds-conjugated diene monomers such as block copolymers and styrene-butadiene block copolymers; cellulose esters such as cellulose diacetate; regenerated cellulose; polyesters; polyamides; Fluororesin And the like.

Further, as the foamable thermoplastic resin described below, for example, polyvinyl chloride, vinyl acetate-vinyl chloride copolymer, polyethylene, polypropylene, polystyrene, acrylonitrile-butadiene-styrene resin, polyvinyl alcohol, polyamide, cellulose and the like. However, the present invention is not limited to these.

The amount of the deodorant containing an anhydride of a chain or alicyclic carboxylic acid as an active ingredient in the present invention with respect to the thermoplastic resin is
Depending on the purpose, it is usually 0.1 to 0.1% with respect to the resin component.
It is 30% by weight, preferably 1.0 to 20% by weight. If the amount used is too small, the deodorizing function may be insufficient.

In the present invention, the compounding method of the deodorant containing an anhydride of a chain or alicyclic carboxylic acid as an active ingredient into the thermoplastic resin is not particularly limited, and, for example, all of the deodorant is added to the thermoplastic resin at once. Alternatively, the thermoplastic resin may be mixed with a part of the deodorant and then the remaining part may be added. Alternatively, blending a deodorant into a part of the thermoplastic resin,
It is also possible to blend the remainder of the thermoplastic resin therein to form the deodorant resin composition of the present invention. Further, the deodorant of the present invention supported on an inorganic substrate such as activated carbon has good dispersibility in a thermoplastic resin and is suitable for blending.

In the present invention, the deodorant resin composition, as long as it does not hinder the function, existing deodorant, if necessary,
Used in combination with germicides, fungicides, and various additives such as stabilizers, lubricants, antioxidants, UV absorbers, processing aids, foaming agents, pigments, flame retardants, impact resistance aids, etc. Can be included.

The deodorant resin composition of the present invention thus obtained, extrusion molding, compression molding, calender molding, hollow molding, injection molding,
It can be processed into various molded products such as films and sheets by ordinary resin processing methods such as thermoforming, laminated molding, and rotational molding. Further, the deodorant resin composition of the present invention can be used alone or in combination with other fiber raw materials to form fibers. The obtained film or sheet may be finely punched with a needle punch or the like so as to have air permeability, coated with cloth, nonwoven fabric, paper or the like, or laminated with another resin film. In the case of fibers, it can be woven into a cloth or a net.

Furthermore, when a foamable thermoplastic resin is used as the thermoplastic resin, the resulting deodorant resin composition can be foam-molded to obtain a deodorant foam.

In the present invention, the method for molding the deodorant foam is not particularly limited, and examples thereof include a method in which the total amount of the deodorant is premixed with the foamable thermoplastic resin and then foam molding is carried out by a conventional method. However, it is also possible that a part of the deodorant is mixed with the expandable thermoplastic resin in advance and foam-molded, and then the remaining deodorant is impregnated into the foam.

The production of a foam from the deodorant resin composition of the present invention has an advantage that a bad odor of ammonia, amine, etc. generated during foaming of the resin can be remarkably reduced and a foam having a high expansion ratio can be obtained.

(Effect of the Invention) Thus, according to the present invention, it is possible to obtain a deodorant having a superior deodorizing property as compared with the prior art. This deodorant is used alone, or is contained in various base materials to be used as a deodorant composite material. By adding the deodorant of the present invention to a thermoplastic resin, a deodorant resin composition having excellent deodorant properties and thermal stability can be obtained. This deodorant resin composition is useful as a raw material for films, sheets, fibers, foams and other various plastic molded products having functions such as deodorization and deodorization, and various molded products obtained are clothing, bedding, It is useful as a material for various products such as furniture, wallpaper, food containers, packaging materials, and filters.

(Example) Hereinafter, the present invention will be described more specifically with reference to Examples.
The parts and% in Examples, Comparative Examples and Reference Examples are based on weight unless otherwise specified.

In this example, the deodorization test was conducted as follows.

(Ammonia deodorization test) A predetermined amount of each sample is put in a glass ampoule with a crown having an inner volume of 150 ml and tightly stoppered. Next, after replacing the inside of the ampoule with air containing a predetermined concentration of ammonia, after a predetermined time, the amount of ammonia in the ampoule is measured by gas chromatography.

(Hydrogen sulfide deodorization test) A predetermined amount of each sample was placed in an odor bag with a silicone rubber stopper having an internal capacity of 3, and air 1 containing a predetermined concentration of hydrogen sulfide was injected. The amount of hydrogen is measured with a Kitagawa gas detector tube.

Reference Example 1 100 g of acrylic acid in a 500 ml separable flask,
300 g of water was charged, 0.1 g of ammonium persulfate was added under a nitrogen atmosphere, and polymerization was carried out at 30 ° C. for 10 hours to obtain polyacrylic acid having a molecular weight of about 6,000. This polyacrylic acid was placed in a hot air circulation oven under a nitrogen atmosphere at 120 ° C. for 4 hours.
After heating for an hour, polyacrylic anhydride (1) was obtained. In addition,
In the infrared absorption spectrum of this product, it was found from the intensity of absorption at 1780 cm ^-1 characteristic of the acid anhydride group that about 40% of the carboxyl group was changed to the acid anhydride group.

Example 1 An ammonia deodorizing test (concentration: 100,000 ppm) and a hydrogen sulfide deodorizing test (concentration: 100 ppm) were performed on 1 g of each deodorant shown in Table 1. The results are shown in Table 1.

From these results, it can be seen that the deodorant of the present invention is excellent in basic odor and hydrogen sulfide deodorizing performance.

Reference Example 2 Various α-olefins shown in Table 2 and an equimolar amount of maleic anhydride were charged in an autoclave, and addition reaction was carried out at 200 ° C. for 15 hours in the presence of a polymerization inhibitor. The unreacted α-olefin is removed under reduced pressure, and the ene addition reaction products I to VI of α, β-unsaturated dicarboxylic acid anhydride and various α-olefins shown in Table 2 are used as deodorant components. Obtained.

Reference Example 3 A pressure-resistant autoclave was charged with 68.6 parts of maleic anhydride and 70 parts of toluene, and after melting at 55 ° C., 0.162 parts of hydroquinone was added, followed by trans-1,
130.9 parts of crude trans-1,3-pentadiene consisting of 40% of 3-pentadiene, 20% of cis-1,3-pentadiene, and 40% of pentanes in total (trans-1,3-per 1 mol of maleic anhydride). Pentadiene (corresponding to 1.1 mol) was continuously added at 50 ° C. for 6 hours, then the temperature was raised to 60 ° C. and the reaction was carried out for 3 hours. After the reaction,
Volatile components are removed by atmospheric distillation at 90 ° C.
As a Diels-Alder reaction product, 3-methyltetrahydrophthalic anhydride (melting point: 61 ° C.) was obtained with a yield of 99%.

Example 2 Using the various deodorant components shown in Table 2, the 3-methyltetrahydrophthalic anhydride obtained in Reference Example 3, citric acid and malic acid as samples, an ammonia deodorization test and a trimethylamine deodorization test were carried out in the same manner as in Example 1. (Trimethylamine concentration 1
The amount of ammonia and trimethylamine was completely deodorized in all the samples after 24 hours. Table 3 shows the results of a hydrogen sulfide deodorization test (concentration: 100 ppm, standing for 24 hours) on a sample prepared in the same manner.

From these results, it can be seen that the deodorant of the present invention has excellent basic odor and hydrogen sulfide deodorizing performance.

Example 3 100 parts of the thermoplastic resin shown in Table 4 and the deodorizing component shown in the same table were mixed with a Henschel mixer to obtain a deodorizing resin composition. The obtained resin composition has a cylinder inner diameter of 65
A sheet having a thickness of 0.1 mm and a screw compression ratio of 5.0 was extruded as a sheet from a T-type die, and the sheet was biaxially stretched to obtain films (1) to (10) having a thickness of 0.1 mm.

Example 4 Films (1) to (10) shown in Table 4 have a length of 250 mm ×
Table 5 shows the results of preparing a sample having a width of 150 mm and performing an ammonia deodorizing test and a hydrogen sulfide deodorizing test. In addition,
In this test, the ammonia concentration is 5,000ppm,
The concentration of hydrogen sulfide was 50 ppm.

From this result, it can be seen that the deodorant resin molded product of the present invention is excellent in basic odor and hydrogen sulfide deodorizing property.

Example 5 Films (11) to (19) having a thickness of 0.1 mm were obtained in the same manner as in Example 3 from 100 parts of the thermoplastic resin shown in Table 6 and the deodorant components shown in the table.

Example 6 Films (11) to (19) shown in Table 6 were subjected to the same ammonia deodorization test and hydrogen sulfide deodorization test as in Example 4, and the results are shown in Table 7.

Example 7 Vinyl chloride resin (Zeon 43A manufactured by Nippon Zeon Co., Ltd.) 1
Stabilizer (Asahi Denka Kogyo Co., Ltd. Stabilizer for vinyl chloride, MARK AC-173) 3 parts, dodecenyl succinic anhydride 4 parts, plasticizer (dioctyl phthalate) 60 parts to 00 parts,
A paste sol was obtained by mixing for 10 minutes with a raker machine. This sol was coated on a glass plate with a bar coater and then treated in an oven at 190 ° C. for 2 minutes to obtain a polyvinyl chloride film (20) having a thickness of 450 μm. Film obtained
(20) was colorless and transparent.

Example 8 Instead of dodecenyl succinic anhydride, ene addition reaction product
The thickness is 450 μm in the same manner as in Example 7 except that IV is used.
A film (21) of m was obtained. The obtained film (21) was colorless and transparent.

Comparative Example 1 A film (22) having a thickness of 450 μm was obtained in the same manner as in Example 7 except that trimellitic acid was used instead of dodecenyl succinic anhydride. The obtained film (22) was colored brown and opaque.

Comparative Example 2 Instead of dodecenyl succinic anhydride, a mixture of ferrous sulfate, citric acid, and sodium citrate (mixing ratio = 8
0: 15: 5), but in the same manner as in Example 7,
A film (23) having a thickness of 450 μm was obtained. The obtained film (23) was colored brown and had a large number of bubbles and was non-uniform.

Example 9 (Deodorization test) The same deodorization test as in Example 4 was conducted on the films (20) to (23). The test was omitted for the film (23) due to the poor shape of the film. The results are shown in Table 8.

From Table 8, it can be seen that the deodorant resin molded product of the present invention is excellent in basic odor and hydrogen sulfide deodorizing property.

Example 10 High-density polyethylene (Showa Denko KK, Sholex
F5012M) 95 parts and 5 parts of the ene addition reaction product III were mixed, and from an extruder equipped with a nozzle for monofilament,
Extruded as undrawn yarn at the cylinder tip temperature of 220 ° C,
After passing this through a 30 ° C cooling tank, it is heated and drawn with boiling water at 100 ° C to give 300 denier fiber (1).
Got

Example 11 A 300 denier fiber (2) was obtained in the same manner as in Example 10 except that the ene addition reaction product V was used in place of the ene addition reaction product III.

Example 12 A 300 denier fiber (3) was obtained in the same manner as in Example 10 except that polypropylene (Show Allomer MA210, manufactured by Showa Denko KK) was used in place of the high-density polyethylene.

Comparative Example 3 A 300 denier fiber (4) was obtained in the same manner as in Example 10 except that no deodorant was used.

Comparative Example 4 A 300 denier fiber (5) was obtained in the same manner as in Example 12 except that the deodorant was not used.

Example 13 (Deodorization test) Fibers obtained in Examples 10-12 and Comparative Examples 3 and 4
A deodorization test was conducted on 10 g of each of (1) to (5). However, in this embodiment, the ammonia concentration is 5,000 pp.
The m and hydrogen sulfide concentrations were 50 ppm. The results are shown in Table 9.

From the results shown in Table 9, it can be seen that the fiber obtained from the deodorizing resin composition of the present invention is excellent in basic odor and deodorizing property of hydrogen sulfide.

Example 13 Polyvinyl chloride resin (Zeon Resin 3 manufactured by Nippon Zeon Co., Ltd.)
3) To 100 parts, add 3 parts of barium-zinc heat stabilizer, 6 parts of azodicarbonamide foaming agent, 15 parts of titanium oxide, 80 parts of calcium carbonate, 65 parts of dioctyl phthalate and 5 parts of mineral spirit After being made into a slurry by a machine, an ene addition reaction product II corresponding to 5% of the total solid content of the slurry was added and kneaded for 5 minutes to obtain a paste sol. 200 this sol on paper with a bar coater
After applying to a thickness of μm, in a hot air circulation type oven, 2
It was treated at 10 ° C. for 60 seconds to obtain a foamed sheet (1b).

Example 14 A foamed sheet (2b) was obtained in the same manner as in Example 13 except that a vinyl acetate-vinyl chloride copolymer resin (ZEON Resin 135J manufactured by Nippon Zeon Co., Ltd.) was used instead of the polyvinyl chloride resin.

Example 15 Instead of ene addition reaction product II, ene addition reaction product III
A foamed sheet (3b) was obtained in the same manner as in Example 13 except that was used.

Example 16 A foamed sheet (4b) was obtained in the same manner as in Example 13 except that the ene addition reaction product IV was used in place of the ene addition reaction product II.

Example 17 A foamed sheet (5b) was obtained in the same manner as in Example 13 except that 3-methyl-Δ ⁴ -tetrahydrophthalic anhydride was used instead of the ene addition reaction product II.

Comparative Example 5 A foamed sheet (6b) was obtained in the same manner as in Example 13 except that the ene addition reaction product II was not added.

Example 18 The ene addition reaction product II was dissolved in toluene to prepare a 5% toluene solution. This was impregnated with the foamed sheet (6b) obtained in Comparative Example 5 and dried, and then the amount of deodorant attached was 5%.
A foam sheet (7b) of was obtained.

Example 19 (Deodorization test) Foamed sheets (1) obtained in Examples 15 to 18 and Comparative Example 5
A deodorizing test was performed on b) to (7b) in the same manner as in Example 4. The results are shown in Table 10.

From the results shown in Table 10, it can be seen that the deodorant foam obtained from the deodorant thermoplastic resin composition of the present invention is excellent in deodorizing ammonia and hydrogen sulfide.

Example 20 1 g of the paste sol prepared in Example 13 and Comparative Example 5 was placed in an ampoule having an inner volume of 150 ml and sealed tightly, and the ampoule was immersed in an oil bath at 220 ° C. for 10 minutes to foam the paste sol. When the ampoule was opened and the odor of the gas phase was examined, a strong ammonia odor was felt from Comparative Example 5, but Example 13 was odorless. Further, when the odor of the foam in the ampoule was examined, the foam of Example 13 had no ammonia odor, whereas the foam of Comparative Example 5 had an ammonia odor.

When the deodorant of the present invention is mixed with the expandable thermoplastic resin and then foamed, according to the method for producing a deodorant foam, the emission of ammonia odor generated by the decomposition of the foaming agent to the surroundings is significantly suppressed. I understand.

Example 21 In Examples 13, 15, 17 and Comparative Example 5, foam sheets (1a), (3a), (5a) and (6a) were respectively subjected to the same operations except that the heat treatment time was 30 seconds. Got Similarly, the heat treatment time was set to 90 seconds, and the foam sheets (1c), (3
c), (5c) and (6c) were obtained. Table 11 shows the results of measuring the expansion ratios of these foamed sheets and foamed sheets (1b), (3b), (5b) and (6b).

From this, it can be seen that the deodorant used in the deodorant foam of the present invention does not affect the shape of the foam.

Claims (5)

[Claims] 1. A deodorant comprising a chain or alicyclic carboxylic acid anhydride as an active ingredient. 2. A deodorant composite material comprising a base material containing the deodorant according to claim 1. 3. A deodorant resin composition obtained by blending the deodorant according to claim 1 with a thermoplastic resin. 4. A deodorant resin molded product obtained by processing the deodorant resin composition according to claim 3. 5. A deodorant foam obtained by foaming the deodorant resin composition according to claim 3, wherein a foamable thermoplastic resin is used as the thermoplastic resin.