JPH041299A - Phosphorus-free bleaching detergent composition - Google Patents

Abstract

PURPOSE:To improve the stability of sodium percarbonate in a detergent during long-term storage by controlling the moisture content and zeolite content of a detergent composition containing a surface active agent and an alkali builder. CONSTITUTION:A detergent composition containing at least one surface active agent selected from anionic and nonionic surface active agents and an alkali builder, which also contains 5-30wt.% sodium percarbonate, 0.5-10wt.% bleaching activator, and 0.5-5wt.% water-soluble chelate builder and in which both the moisture content and the zeolite content are set at 5wt.% or less. Examples of the bleaching activator include tetraacetylethylenediamine and a nonanoyloxybenzenesulfonic acid salt.

Description

[Detailed description of the invention] Storehouse! The present invention relates to a phosphorus-free bleaching detergent composition in which sodium percarbonate has good oral stability and has excellent bleaching properties.

Laundry detergents containing natural bleaching agents can remove sebum stains from clothing as well as stains from tea, coffee, fruit, blood, etc.

As bleaching agents, oxygen bleaching agents such as percarbonates and perborates are mainly used, and bleaching activators such as tetraacetylethylenediamine are also used to enhance the bleaching effect. ing.

On the other hand, detergent compositions containing bleach contain surfactants and alkali builders, which are the main cleaning ingredients, as well as phosphate builders and other ingredients, but this problem poses the problem of eutrophication in closed water bodies. Since then, phosphorus-free compositions have been developed that do not substantially destroy the phosphate builder. In such phosphorus-free detergents, zeolites and water-soluble chelate builders (metal ion scavengers) are used as alternative builders to phosphoric acid builders, with zeolites being the mainstream.

Examples of phosphorus-free detergents containing bleaching ingredients include Tokikai Publication No. 64-6098 or No. 64-8529.
No. 7 discloses one containing a surfactant, an alkali builder, and a zeolite.

However, although sodium percarbonate has a considerable advantage over sodium perborate in solubility at low temperatures, it has a drawback in stability when stored for long periods in detergents. Therefore, when incorporated into the above-mentioned phosphorus-free detergents, there is a problem in that sodium percarbonate decomposes during long-term storage and the bleaching effect is significantly reduced.

The present invention provides a phosphorus-free bleaching detergent composition in which sodium percarbonate is stably blended.

The non-phosphorus bleaching detergent composition of the present invention further comprises (a) percarbonate in the detergent composition containing at least one surfactant selected from anionic surfactants and nonionic surfactants and an alkali builder. Sodium: 5-30% by weight, (b) bleach activator 20.5-10% by weight, (c)
Water-soluble chelate builder: 0.5 to 5% by weight.

(d) The zeolite content is 5% by weight or less, and.

(e) The water content in the composition is 5% by weight or less.

The present invention will be explained in more detail below.

As a result of extensive studies by the present inventors, it has been found that the stability of sodium percarbonate in a detergent composition containing a surfactant and an alkali builder is greatly influenced by the amount of water and the amount of zeolite in the detergent composition. Ta. Specifically, by controlling the water content in the detergent composition to 5% by weight or less (preferably 3% by weight or less) and the zeolite content to 5% by weight or less (preferably 3% by weight or less), The stability of sodium percarbonate during long-term storage is improved. Both the water content and the zeolite content need to be 5% by weight or less, and if either one exceeds 5% by weight, the stability of sodium percarbonate will deteriorate.

As the surfactant, at least one of anionic surfactants and nonionic surfactants is used.

The anionic surfactant may be a non-soap anionic surfactant or a soap, and specific examples of the former include the following.

1) Straight-chain alkylbenzene sulfonate having an alkyl group having an average of 10 to 16 carbon atoms; 2) α-olefin sulfonate having an average of 10 to 20 carbon atoms.

3) It has a linear or branched alkyl group or alkenyl group having an average carbon number of IO to 20.

Alkyl ether sulfate or alkenyl ether sulfate to which an average of 0.5 to 8 moles of ethylene oxide is added, 4) Alkyl sulfate having a linear or branched alkyl group with an average carbon number of 10 to 20, 5) Average carbon Number 1
α- having 0 to 20 alkyl or alkenyl groups
Sulfo fatty acid ester salts, α-sulfo fatty acid mono- or di-salts, and salts of these anionic surfactants are usually alkali metal salts such as sodium salts and potassium salts.

As the soap, alkali metal salts of fatty acids having 14 to 24 carbon atoms are used, and sodium salts are preferred. Specific examples include sodium salts of tallow fatty acids such as hardened beef tallow, unhardened beef tallow, and pork fat, sodium salts of vegetable oil fatty acids such as coconut oil, and sodium salts of synthetic fatty acids.

As the nonionic surfactant, for example, polyoxyethylene alkyl (or alkenyl) ether, which is obtained by condensing ethylene oxide with a saturated or unsaturated aliphatic alcohol, can be used. The carbon chain of the aliphatic alcohol may be straight or branched and preferably has from 8 to 22 carbon atoms. As a typical specific example, carbon number 11-
15 aliphatic primary alcohol condensed with 5 to 15 mol of ethylene oxide per mol of aliphatic primary alcohol, or carbon number 1
Examples include those to which 5 to 15 ethylene oxides are added per mole of secondary alcohol having 0 to 12 branched carbon chains. It is also possible to use polyoxyethylene polyoxypropylene alkyl (or alkenyl) ether obtained by random or block condensation of ethylene oxide and propylene oxide with a saturated or unsaturated aliphatic alcohol. The carbon chain of the aliphatic alcohol may be straight or branched and preferably has from 8 to 22 carbon atoms. per mole of primary or secondary alcohol,
5 to 30 moles of ethylene oxide (E○) and about 3 to 20
A condensation of mol of propylene oxide (PO) is preferred.

It is appropriate that the surfactant be incorporated in the bleaching detergent composition in an amount of 10 to 30% by weight.

As the alkali builder, silicates, carbonates, bicarbonates, etc. are used, and these are contained in the composition in an amount of 10 to 30% by weight.
It is desirable to mix them.

The bleaching detergent composition of the present invention further contains 0.5 to 5% by weight, preferably 1 to 3% by weight, of a water-soluble chelate builder. Even if the amount of the water-soluble chelate builder exceeds 5% by weight, no significant effect will be obtained and the cost will increase.

Specific examples of water-soluble chelate builders include:

Nitrilotriacetate, aminopolyacetate such as ethylenediaminetetraacetate, polycarboxylate such as citrate, polyacrylate, polyitaconate, copolymer of olefin and maleic anhydride, acrylic acid and maleic anhydride Polymers such as copolymers of

Sodium percarbonate is incorporated into the bleaching detergent composition in an amount of 5 to 30% by weight, preferably 10 to 20% by weight. If the amount is less than 5% by weight, a sufficient bleaching effect cannot be obtained;
Even if it exceeds 0% by weight, no significant bleaching effect will be obtained and it will be disadvantageous in terms of cost.

The bleach activator is present in the composition in an amount of 0.5 to 10% by weight, preferably 1% to enhance the bleaching effect of sodium percarbonate.
It is blended in an amount of ~6% by weight, and an epoch-making bleaching effect can be obtained especially when washing at a high temperature of 40°C or higher.

Specific examples of bleach activators include tetraacetylethylenediamine (TAED), nonanoyloxybenzenesulfonate (NOBS), N-chlorotetramethylpiperisinol (TMP-C1), and the like.

In addition to the above-mentioned essential components, the bleaching detergent composition of the present invention further contains recontamination prevention proteases such as carboxymethyl cellulose and polyethylene glycol, enzymes such as lipase, cellulase, and amylase; fluorescent agents, fragrances, and pigments. be able to.

According to the present invention, a water-soluble builder, sodium percarbonate, and a bleach activator are blended into a system containing a surfactant and an alkali builder to obtain a phosphorus-free bleaching detergent composition. By controlling the amount of zeolite to 5% by weight or less and the amount of water to 5% by weight or less, the stability of sodium percarbonate during long-term storage can be improved and an excellent bleaching effect can be maintained.

C14-18 α-olefin sodium sulfonate 10
wt% Linear alkyl (C□2) sodium benzenesulfonate 10% it% Softanol EP12050' C18 fatty acid sodium soda ash Sodium percarbonate TAED Zeolite water Glauber's salt 5wt% 5wt% 20wt% 10-20wt% 1-6wt% 3-8 Bleaching detergent compositions having the above-mentioned common composition were prepared: 12 moles of EO, 5 moles of PO adduct of a secondary alcohol, a nonionic surfactant manufactured by Nippon Shokubai (1), and a nonionic surfactant manufactured by Nippon Shokubai (1). Here, as shown in Table 1 below, sodium percarbonate,
The stability of sodium percarbonate was evaluated by adjusting the amounts of tetraacetylethylenediamine (TAED), zeolite, and water content in the composition, and the results are shown in Table 1.

Method for evaluating the stability of sodium percarbonate 150 mQ of the detergent composition was sealed in a 220 mn mayonnaise bottle and stored for one month under recycling conditions at 45°C = 25°C.

Thereafter, 5 g of the detergent composition was taken, and after adding 50 mn of 50% acetic acid aqueous solution, the amount of effective oxygen was determined by iodometry, and the residual rate of effective oxygen was calculated from the following formula.

(Margin below)

Claims (1)

[Claims] 1. A detergent composition comprising at least one surfactant selected from anionic surfactants and nonionic surfactants and an alkali builder, further comprising (a) sodium percarbonate: 5 (b) a bleach activator: 0.5-10% by weight; (c) a water-soluble chelate builder: 0.5-5% by weight; and (d) a zeolite content of 5% by weight. A phosphorus-free bleaching detergent composition which is as follows, and (e) has a water content of 5% by weight or less.