JPS59176400A - Polyurethane foam containing detergent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detergent-containing polyurethane foam, and more particularly to a detergent-containing polyurethane foam that can be used for cleaning automobiles, baths, tiles, and the like.

A polyurethane foam containing a detergent has been proposed, for example, in JP-A-53-119904, in which an alkylaryl sulfonate is used as the detergent.

However, this sulfonate has the property of significantly reducing the physical properties of polyurethane 7 ohm due to by-products during manufacturing, 1 for example, significantly reducing mechanical strength such as tensile strength. . Furthermore, since the above-mentioned sulfonate has a large molecular weight, it has the disadvantage that even if urethane 27 ohm is compressed during use, it does not immediately ooze out to the outside, so-called poor initial foaming.

The purpose of the present invention is to provide a polyurethane foam containing a detergent that eliminates the drawbacks of the prior art. It was discovered that by incorporating a predetermined amount of salt and powdered aluminosilicate into a polyurethane foam, a detergent-containing polyurethane foam that has the necessary mechanical strength as a polyurethane foam and has good initial foaming properties can be obtained. The invention was completed.

That is, the present invention provides polyurethane foam with a
~35% by weight of higher alcohol sulfate salt and 5
The gist of the present invention is a detergent-containing polyurethane foam characterized by containing a bed-like aluminosilicate of ~20% by weight.

Polyurethane foams that can be used in the detergent-containing polyurethane foam of the present invention include:

A polyurethane foam obtained by reacting a polyether polyol and a polyisocyanate compound in the presence of a blowing agent or the like may be used.

Examples of higher alcohol sulfate salts that can be used in the present invention include lauryl alcohol sulfate salts, myristyl alcohol sulfate salts, cetyl 7, II/co-
71/ Sulfur rR ester salts, stearyl alcohol sulfate ester salts, oleyl alcohol sulfate ester salts, and the like. Among these, diuryl alcohol sulfate salt has a relatively small molecular weight.

Myristyl alcohol sulfate ester salt has a relatively small hydrophobic group, so it dissolves well in water even at low temperatures, and is preferred because it has great detergency. The amount of higher alcohol sulfate salt added is:
If it is less than 10% by weight, the initial foaming will be poor when wetted with 7 ohm, and the foam will not last as long as the present invention. It is difficult to achieve the purpose of Q.9.
If the weight ratio exceeds 3s, the mechanical strength at 7 ohm wet condition will be significantly reduced.

As the powdered aluminosilicate that can be used in the present invention, 2
Examples include talc, kaolin, mica, montmorillonite, and the like. The amount of powdered aluminosilicate added is 5 to 20% by weight, preferably 7 to 20% by weight, based on the polyurethane foam.
Engineering 5-layer f-chiadeashi.

If it is less than 5% by weight, the hardness of the foam when wetted will be low and the mechanical strength will be reduced, and if it exceeds 20% by weight, the viscosity of the liquid mixture will be high when foaming the polyurethane foam, which will interfere with stirring. This is because it is undesirable because it causes oxidation and extremely poor reactivity.

The detergent-containing polyurethane foam of the present invention can be produced, for example, by the following method.

That is, a polyol, a polyisocyanate compound, a higher alcohol sulfate ester salt, a powdered aluminosilicate, and other additives as necessary are mixed at a temperature of, for example, 20 to 30°C and a pressure of 0.2 to 5 to 9/-. It can be obtained by reaction under stirring.

Examples of the polyol used here include 1,2-propylene oxide or a derivative of 1,2-propylene oxide and ethylene oxide.

In the latter case, ethylene oxide accounts for 3% of the total epoxy amount.
The content is preferably less than 0% by weight, since the foam swells when wet, resulting in a decrease in physical properties, and it is difficult to obtain 7 ohms with high continuity during foaming. In the above polyol, 1,2-propylene oxide and ethylene oxide may be bonded alternately or randomly. Also, diols such as 1,2-butylene glycol, diethylene glycol, fluoropylene glycol, butylene glycol, triols such as glycerin, trimethylolpropane, 3-methyl-1,3,5-pentanetriol,
Pentaerythritol, nrubitol.

Tetrahydric or higher polyhydric alcohol such as glucose,
Polyhydric phenols such as resorcinol and catechol, polyphenols such as bisphenol A, etc. can be used.

The above initiators can be used alone or in combination,
It is preferable that the number of functional groups is 2 to 4 on average. The average molecular weight of the polyol is preferably about 2,000 to 8,000. If it is less than 2,000, the physical properties of the foam when wet tend to deteriorate, and if it exceeds 8,000, the viscosity during production is high and stirring may be hindered. Since the resulting 91 reactivity is poor, workability tends to be poor.

Polyiso/anate compounds that react with the above polyols include 1, for example, tolylene diisocyanate, crude diphenylmethane diisocyanate, hexamethylene diine, 7
2. φ, 2.4-tolylene diisocyanate in which anate, inphorone diisocyanate, etc. can be used;
A mixture of 2% and 6'-tolylene diinocyanate is preferred in a ratio of 65:35.

Additives may be used in the above reaction, and examples of such additives include a crosslinking agent, a blowing agent, a silicone surfactant, and a catalyst.

Examples of crosslinking agents include ethylene glycol.

Diethylene glycol, triethylene glycol.

Globylene glycol, dipropylene glycol.

Examples include those with relatively low molecular weights such as butanodiols, diols, diethanolamines, triethanolamines, etc., which can improve foam hardness and wet mechanical strength. The amount of crosslinking agent used is usually 1 to 10 parts by weight or 2 to 7 parts by weight based on the polyol, and if it is less than 1 part by weight, the hardness of the foam tends to be low when wet. If the amount exceeds 100 parts by weight, the catalyst stability range during foam production becomes narrow, making foaming difficult, and the compressive residual strain of the foam tends to increase.

As the blowing agent, commonly used ones can be used, such as water and/or low-boiling organic solvents such as trichloromonofluoromethane and methylene chloride.

As the silicone surfactant, commonly used ones can be used. For example, L-520, L-540, L-57.
10, L-6202 (manufactured by Niion Carbide Co., Ltd.),
F-258, F-114 (LSH-1,90°5 manufactured by Shin-Etsu Silicone Co., Ltd.) (-192,5H-194,5
Examples include RX-298°5RX-253 (manufactured by Toshi Silicone Co., Ltd.). These can be used alone or in combination, and what is called a foam-breaking silicone such as L-501,5H-20″θ can also be added.The amount of the surfactant added is usually It weighs about 0.1-5% per liter.

As the catalyst, commonly used tertiary amines, metal compounds, etc. can be used. Useful tertiary amines include, for example, N-methylmorpholine, N-ethylmorpholine, triethylamine, bis(2-dimethylamineethyl)ether, hexamethylenediethylenetriamine, tetramethylethylenediamine, pentamethyldiethylenetriamine, triethylenediamine, and the like. Examples of tin compounds include tin octoate,
Mention may be made of stannous oleate.

Also, other additives 1 such as colorants and mold inhibitors.

Stabilizers and the like may also be added.

The cleaning agent-containing polyurethane foam of the present invention can be suitably used for cleaning automobiles, baths, tiles, etc., for example.

As explained above, the detergent-containing polyurethane foam of the present invention contains a predetermined amount of higher alcohol sulfate salt and powdered aluminosilicate, thereby achieving
M has advantages such as increased mechanical strength such as tensile strength of the foam when wetted at 1 hour, and higher alcohol sulfate ester salt has a small molecular weight and high solubility, so initial foaming and foam persistence are good. It is something that you have.

The present invention will be explained in more detail below by referring to Examples and Comparative Examples. Similarly, in the following description, 1 part means part by weight.

Example 1 Chain-extended with propylene oxide using glycerin as an initiator with an average molecular weight of 5000. Polyol 1 with hydroxyl value 34
00 parts were mixed with 48 parts of lauryl alcohol sulfate salt, and then 30 parts of kaolin were mixed therein. The above mixed solution was reacted with citolylene diiso7anate 65/35 using a conventional soft slab foam foaming method to produce a mass of 74 kg.
/'m' detergent-containing polyurethane foam was obtained.

Various mechanical strengths of the obtained foam were measured before and during wetting. The results are shown in Table 1. In addition, when cleaning tiles using the above foam, initial foaming and
And the foam retention was good.

Comparative Example 1 A detergent-containing polyurethane foam was obtained in the same manner as in Example 1, except that 80 parts of dodecylbenzenesulfonate containing 60% of the active ingredient was used in place of 48 parts of lauryl alcohol sulfate. The mechanical strength of the obtained polyurethane foam was measured in the same manner. The results are shown in Table 1.

When this foam was used for cleaning, its physical properties when wet were poor and the foam tore.

Comparative Example 2 A detergent-containing polyurethane foam was obtained in the same manner as in Example 1, except that 48 parts of a nonylphenol type nonionic surfactant was used in place of 48 parts of lauryl alcohol sulfate. The resulting 7 ohm was very easily torn, so its mechanical strength could not be measured, and it was also impossible to use it for cleaning.

Comparative Example 3 A detergent-containing polyurethane foam was obtained in the same manner as in Example 1 except that 30 parts of Glauber's salt was used instead of 30 parts of kaolin. The mechanical strength of the obtained foam was measured in the same manner. The results are also shown in Table 1.

Example 2 100 parts of a polyol of 10/90 ethylene oxide/propylene oxide having an average molecular weight of 4000 and 55 parts of lauryl alcohol sulfate were mixed, and then 30 parts of kaolin were mixed.

The above mixture was reacted with tolylene diisocyanate 65/35 to obtain a detergent-containing polyurethane foam having a density of 71 kg 7 m. The mechanical strength of the obtained foam was measured. The results are also shown in Table 1.

Furthermore, when the above foam was used for washing, the initial foaming and foam sustainability were good.

Claims (1)

[Claims] A polyurethane foam comprising 10 to 35% by weight of a higher alcohol sulfate salt and 5 to 20% by weight of a bed-like aluminosilicate based on the weight of the polyurethane foam.