JPH05222232A - Deodorant polyurethane foam and its production - Google Patents

Abstract

PURPOSE:To provide a deodorant polyurethane foam capable of sustaining deodorant effects for a long period. CONSTITUTION:The objective deodorant polyurethane foam is obtained by dispersing microcapsules 12 containing a deodorant in a cell film or the skeleton 13 of a polyurethane foam 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved polyurethane foam, and more particularly to a polyurethane foam having a deodorant effect and a method for producing the same.

[0002]

2. Description of the Related Art Generally, an insole made of a sponge material such as polyurethane foam or a soft solid material is often used as a cushioning material on the inside of shoes.

Recently, in order to remove an unpleasant odor when taken off, the insole is sometimes required to have a deodorizing effect. By the way, as a method of imparting a deodorizing effect to a polyurethane foam, a method of impregnating or coating a polyurethane foam with a deodorant such as activated carbon can be considered. However, the cushioning and breathability of the insole were impaired, and the contact with the foot was poor, and conversely, it could cause stuffiness and odor. Furthermore, such post-treatment complicates the manufacturing process, and since it is a treatment only on the surface of the molded product, it is difficult to maintain the effect.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems, and an object thereof is to provide a deodorant polyurethane foam having a long-lasting deodorant effect. Further, the present invention is intended to provide a method for producing a deodorant polyurethane foam, which can easily obtain such a deodorant polyurethane foam.

[0005]

There are two inventions proposed here, the first invention relates to a deodorant polyurethane foam, and the second invention relates to a manufacturing method thereof. That is, the first invention relates to a deodorant polyurethane foam in which microcapsules containing a deodorant are dispersed in the foam film or skeleton of the polyurethane foam.

The second invention is that, when a polyurethane foam raw material containing a polyol, an isocyanate, a catalyst and a foaming agent is reacted to produce a polyurethane foam, microcapsules containing a deodorant are added to 100 parts by weight of the polyol. With respect to the above, 0.01 to 50 parts by weight are added to the polyurethane foam raw material in a ratio of 0.01 to 50 parts by weight.

[0007]

EXAMPLES The present invention will now be described with reference to examples in order to more specifically describe the present invention, but the present invention is not limited to these examples. 1 is a perspective view showing an example of molding the deodorant polyurethane foam of the present invention on an insole of shoes, FIG. 2 is a sectional view taken along line 2-2, and FIG. 3 is an enlarged sectional view showing the deodorant polyurethane foam of the present invention Is.

The insole 10 is made of a polyurethane foam material 11, and the microcapsules 12 containing the deodorant are dispersed in the foam film or the entire skeleton of the foam material and integrally molded.

As shown in FIG. 3, the microcapsules 12 are dispersed and integrally formed inside the foam film and the skeleton 13 of the polyurethane foam material 11, and gradually release the deodorant component as the insole is used.

The microcapsules used in the present invention are not particularly limited, and are made of, for example, a melamine formaldehyde resin having a particle size of 1 to 50 .mu. The deodorant used here is also not particularly limited, and various types are selected depending on the application of the polyurethane foam produced, and for example, terpene oil and the like are also used. In this microcapsule, innumerable small holes are formed in the capsule film, and the deodorant inside is gradually diffused from the holes. In addition, some capsule membranes are destroyed by an external force to generate deodorant components, and either one may be used depending on the purpose of the urethane foam. The amount of microcapsules added to the polyurethane foam raw material is 0.01 to 50 per 100 parts by weight of polyol.
Parts by weight, preferably 0.1 to 5 parts by weight.

The polyurethane foam material 11 is obtained by mixing and reacting a polyurethane foam raw material comprising a polyol, an isocyanate, a catalyst, a foaming agent and the like.

The polyols used in the present invention include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, trimethylene glycol, glycerin, pentaerythritol, trimethylolpropane, sorbitol,
Polyhydric alcohols such as sucrose and their alkylene oxide adducts, alkylene oxide adducts of polyhydric phenols such as bisphenol A, phosphoric acid, benzene phosphoric acid, polyphosphoric acid (eg tripolyphosphoric acid and tetrapolyphosphoric acid) Polyhydric hydroxy compounds such as, phenol-aniline-formaldehyde ternary condensation product, aniline-formaldehyde condensation product, ethylenediamine, diethylenetriamine, triethylenetetramine,
For polyamines such as methylenebis orthochloraniline, 4,4- and 2,4′-diphenylmethanediamine, 2,4-tolylenediamine, 2,6-tolylenediamine, alkanolamines such as triethanolamine and diethanolamine. Ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran,
A polyether polyol or a polytetramethylene ether glycol obtained by adding one or more of styrene oxide and the like. Also, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, trimethylene glycol 1,3- and 1,4-butanediol, tetramethylene glycol, neopentyl glycol, hexamethylene glycol, decamethylene glycol, glycerin. , Trimethylolpropane,
One or more compounds having at least two hydroxy groups such as pentaerythritol and sorbit, and malonic acid, maleic acid, succinic acid, adipic acid, tartaric acid, sebacic acid, oxalic acid, phthalic acid, terephthalic acid, Also used are ring-opening polymers of polyester polyols obtained from one or more compounds having at least two carboxyl groups such as trimellitic acid and hemellitic acid, and cyclic esters such as polycaprolactone.

As mentioned above, the preferred range of hydroxyl number of various polyols is 2.0 to 150 mgK.
OH / g, and these polyols are used alone or as a mixture.

The isocyanate used in the present invention is a known one and is not particularly limited. One or more of aromatic, alicyclic and aliphatic polyisocyanates and modified polyisocyanates obtained by modifying them. Are appropriately mixed and used. Examples of the aliphatic polyisocyanate include hexamethylene diisocyanate and dichlorohexamethane diisocyanate. Examples of the aromatic polyisocyanate include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate and 2,4
-A mixture of tolylene diisocyanate and 2,6-tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, xylylene diisocyanate, polymethylene polyphenyl diisocyanate, various known diphenylmethanes modified with carbodiimide groups-
4,4'-diisocyanate dianisidine diisocyanate and the like.

The catalyst which can be used in the present invention is a conventionally known catalyst and is not particularly limited, but triethylenediamine, triethylamine, tripropylamine, triisopropanolamine, tributylamine, trioctylamine, hexadecyldimethylamine, N- Methylmorpholine, N
-Ethylmorpholine, N-octadecylmorpholine, monoethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine, N, N-
Tertiary amine catalysts such as dimethylethanolamine, formate and other salts of triethylenediamine, oxyalkylene adducts of amino groups of primary and secondary amines, N-
There are aza ring compounds such as N-dialkyl piperazines, various N, N ′, N′-trialkylaminoalkylhexahydrotriazines and the like.

Examples of the organometallic urethane-forming catalyst include tin acetate, tin octylate, tin laurate, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin dichloride, lead octanoate, lead naphthenate, nickel naphthenate, naphthenic acid. There is cobalt, etc.

The blowing agent in the present invention is water, trichloromonofluoromethane, dichlorodifluoromethane, methylene chloride, trichlorofluoroethane, dibromotetrafluoroethane, trichloroethane, pentane,
It is a mixture of one or more such as n-hexane.

Further, a foam stabilizer is used if necessary.
A useful foam stabilizer is a conventionally known organic silicon surfactant, such as L-520 manufactured by Nippon Unicar Co., Ltd.
L-532, L-540, L-544, L-3550,
There are L-5740S, L-5740M, L-6202, etc., SH-190, SH- manufactured by Torre Silicone Co.
192, SH-194, SRX-294, etc., and Shin-Etsu Silicone Co.'s F-114, F-121, F-12.
2, F-220, F-230, F-258, F-260
B, F-317, F-341, F-601, F-606
And so on.

Further, if necessary, auxiliary agents such as flame retardants, dyes and coloring materials can be added.

To carry out the present invention, a polyol, an isocyanate, a catalyst, a foaming agent, a foam stabilizer and other auxiliaries and microcapsules containing a deodorant are mixed in a predetermined ratio to foam. The mixing ratio is such that the equivalent ratio (NCO / H) between the amount of NCO in the polyisocyanate and the active hydrogen in the other raw materials is 0.8 to 1.3.

The production examples of the deodorant polyurethane foam will be described below. In this example, the following formulation was used, and the polyol used was a polyether polyol having a hydroxyl value of 56 mgKOH / g obtained by addition-polymerizing propylene oxide and ethylene oxide to glycerin. (Parts by weight) Polyol 100 Water 4.0 Triethylenediamine 0.1 Silicon foam stabilizer 1.0 Stannas octoate 0.3 Toluene diisocyanate 52.4 Deodorant microcapsules 5 Preliminarily the polyol, water and foam stabilizer Microcapsules containing the agent, stanna octoate and deodorant were added and mixed, and then toluene diisocyanate was added and mixed to foam. The obtained polyurethane foam had a long-lasting deodorizing effect. The cushioning property was also good.

[0022]

As shown and described above, according to the deodorant polyurethane foam and the method for producing the same of the present invention, a polyurethane foam having a high deodorant effect for a long period of time can be simply obtained without impairing its cushioning property. This is a great advantage when manufacturing articles that come into contact with the human body, such as shoe insoles.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example in which the deodorant polyurethane foam of the present invention is molded on a shoe insole.

FIG. 2 is a sectional view taken along line 2-2.

FIG. 3 is an enlarged sectional view showing a deodorant polyurethane foam of the present invention.

[Explanation of symbols]

 10 Insole 11 Polyurethane foam material 12 Microcapsules 13 Skeleton

Claims (2)

[Claims] 1. A microcapsule containing a deodorant,
A deodorant polyurethane foam dispersed in the foam film or skeleton of polyurethane foam. 2. When a polyurethane foam raw material containing a polyol, an isocyanate, a catalyst and a foaming agent is reacted to produce a polyurethane foam, microcapsules containing a deodorant are added in an amount of 0.01 to 100 parts by weight of the polyol. To 50 parts by weight in the polyurethane foam raw material.