JP2986610B2 - Bleach composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bleaching composition containing an alkali or alkali-resistant pullulanase, and more particularly to a bleaching composition having improved discoloration and fading of colors and patterns.

[0002]

2. Description of the Related Art Generally, an oxidizing reaction is used for bleaching a textile product, and it can be broadly classified into a chlorine type and an oxygen type depending on the type of bleach used for bleaching.

[0003] Oxygen bleaching agents which do not have these drawbacks have recently been developed because chlorine bleaching agents are limited in the fibers that can be used, cannot be used in colors and patterns, and have a unique smell. It is beginning to spread significantly. In recent years, enzyme-containing bleaches have appeared. As an enzyme, a protease is generally used, and α-amylase is also used for starchy soil. Recently, it has been reported that alkali pullulanase and alkali-resistant pullulanase can remarkably improve detergency (JP-A-3-287698, JP-A-3-290498).

Meanwhile, alkali pullulanase and alkali-resistant pullulanase are trace metals (eg, Cu) in a solution.
Chelating agents (EDTA
And the like) are preferably used in combination. However, when a bleach and EDTA are used together with a color / pattern dyed with a metal-containing dye or a color-pattern treated with a metal-containing fixing agent or copper sulfate, these colors and patterns are discolored or faded. The problem arises.

[0005]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, they have found that hydrogen peroxide or a peroxide capable of generating hydrogen peroxide in an aqueous solution and a specific monomer unit are provided. By using a polymer compound and an alkali or alkali-resistant pullulanase in combination, it was found that a bleaching composition having high bleaching power and not causing discoloration or fading of a color or pattern was obtained, and completed the present invention. .

That is, the present invention relates to (a) 50 to 99.4% by weight of hydrogen peroxide or a peroxide which generates hydrogen peroxide in an aqueous solution; and (b) a polymer having a monomer unit represented by the following general formula (I). Or a copolymer or a water-soluble salt thereof 0.05 to 10% by weight

[0007]

Embedded image

(Where X, Y, and Z are -H, -CH ₃ , -COOM, -C
H ₂ COOM represents —OH, and M represents H ₂ or an alkali metal or a mixture thereof. n is a number of 2 or more. (C) A bleaching composition comprising 0.05 to 5% by weight of an alkali or alkali-resistant pullulanase.

The peroxide which generates hydrogen peroxide in the aqueous solution which is the component (a) of the present invention includes sodium carbonate / hydrogen peroxide adduct, sodium tripolyphosphate / hydrogen peroxide adduct, sodium pyrophosphate / Hydrogen peroxide adduct,
Examples include urea / hydrogen peroxide adduct, 4Na ₂ SO ₄ .2H ₂ O ₂ .NaCl, sodium perborate monohydrate, sodium perborate tetrahydrate, sodium peroxide, calcium peroxide and the like. Among these, sodium carbonate / hydrogen peroxide adduct is particularly preferred. (a) Component is 50 to 99.4% by weight in the composition
Although it is blended, it is particularly preferred to blend 50 to 80% by weight.

As the component (b) used in the present invention, the monomer unit of the general formula (I) is acrylic acid, methacrylic acid, fumaric acid, maleic acid, aconitic acid, itaconic acid, 2-hydroxyacrylic acid, citracone Acid or one or more selected from the group consisting of ethylene, vinyl acetate, vinylpyrrolidone, methylvinylpyrrolidone, methylvinylether, styrene, pentene, isobutylene, diisobutylene and butadiene, and a monomer unit of the general formula (I) A copolymer, or a water-soluble salt of the polymer or the copolymer may be used. Of these, polyacrylates, polymaleates, and salts of pentene or a copolymer hydrolyzate of diisobutylene and maleic anhydride are preferred. The molecular weight of these polymers and copolymers and their water-soluble salts is preferably from 200 to 100,000, more preferably from 1,000 to
20000. The amount of the component (b) is 0.
It is preferably from 05 to 10% by weight, particularly preferably from 0.5 to 5% by weight.

In the present invention, alkali pullulanase and alkali-resistant pullulanase are used. Here, alkaline pullulanase refers to those having an optimum pH in the alkaline region, and alkali-resistant pullulanase has an optimum pH in the neutral to acidic region, but also has an optimum pH in the alkaline region compared to the activity at the optimum pH. Having sufficient activity and maintaining stability. Neutral refers to a pH range of 6 to 8, and alkaline refers to a higher pH range.
The alkali pullulanase and the alkali-resistant pullulanase used in the present invention are microorganisms belonging to the genus Bacillus, for example, Bacillus sp described in JP-A-3-290498, Bacillus sp.
No. 886) or Bacillus sp. (Bacillus sp., No. 10887) is preferably used. The alkali or alkali-tolerant pullulanase is present in the composition in an amount of 0.05 to 5% by weight, preferably 0.1 to 5%.
2% by weight is blended.

To the bleaching composition of the present invention, in addition to the above-mentioned components, known components usually added to the bleaching composition can be added. For example, as a surfactant, a linear or branched alkylbenzene sulfonate, an alkyl or alkenyl ether sulfate, an alkyl or alkenyl sulfate,
Olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt, carboxy or sulfobetaine type surfactant, polyoxyalkylene alkyl or alkenyl ether, polyoxyethylene alkyl phenyl ether, higher fatty acid alkanolamide or a salt thereof Can be As the builder, water-soluble inorganic builders such as sulfate, carbonate, bicarbonate, silicate and phosphate, and organic builders such as tartrate and citrate can be used. Also known as stabilizers for peroxides or hydrogen peroxide adducts are magnesium salts such as magnesium sulfate, magnesium silicate, magnesium chloride, magnesium silicofluoride, magnesium oxide and magnesium hydroxide, and silicic acids such as sodium silicate. Salts can be used. Further, if necessary, carboxymethylcellulose, polyvinylpyrrolidone, a re-staining agent such as polyethylene glycol, an enzyme other than alkali or alkali-resistant pullulanase such as protease, cellulase, amylase, and lipase, an optical brightener, a dye, a pigment, a fragrance Etc. can be added.

[0013]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

Example 1 A bleaching composition having the composition shown in Table 1 was prepared, and the bleaching effect and the anti-bleaching property were evaluated by the following methods. Table 1 shows the results.
Shown in

(1) Evaluation method of bleaching effect A bleaching agent shown in Table 1 was added to tap water at 20 ° C. so that the available oxygen became 0.05%, and a curry-contaminated cloth prepared by the following preparation method ^*
Were immersed for 5 minutes in a size of 8 cm × 8 cm for 30 minutes, and the bleaching ratio was calculated by the following equation.

[0016]

(Equation 1)

The reflectance is NDR-1001D manufactured by Nippon Denshoku Industries Co., Ltd.
Measured using P at 460 nm filter. * Curry contaminated cloth: Warm a commercially available retort pack curry (Otsuka Foods, Bon Curry Gold Medium Hot), remove the ingredients with a 1000μ sieve, and sponge the curry roux with a cotton sponge cloth # 200.
3 What was applied to a cloth and air-dried was used as a test piece of 8 cm × 8 cm, which was subjected to an experiment.

(2) Anti-bleaching property After dissolving the bleaching agent in tap water at 40 ° C. so that the effective oxygen concentration becomes 0.05%, dipping a cotton cloth dyed with a direct dye (Sumilight Supra Blue FBGL) for 2 hours, The grade was determined using a gray scale for fading and fading according to JIS L 0804.

[0019]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) C11D 7/54 C11D 7:18 C11D 7:26 C11D 7:42 CA (STN) CAOLD (STN) REGISTRY (STN )

Claims (2)

(57) [Claims] (1) 50-99.4% by weight of hydrogen peroxide or a peroxide capable of generating hydrogen peroxide in an aqueous solution; and (b) a polymer or copolymer having a monomer unit represented by the following general formula (I). Combined or water-soluble salts thereof 0.05 to 10% by weight (Wherein, X, Y, Z is _{-H, -CH 3, -COOM, -CH} 2 COOM, -OH
And M represents H 2 or an alkali metal or a mixture thereof. n is a number of 2 or more. (C) A bleaching composition comprising 0.05 to 5% by weight of an alkali or alkali-resistant pullulanase. 2. An alkali or alkali-tolerant pullulanase.
2. The bleaching composition according to claim 1, wherein (c) is isolated from a culture of a microorganism belonging to the genus Bacillus.