Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3902—Organic or inorganic per-compounds combined with specific additives
  • C11D3/3905—Bleach activators or bleach catalysts
  • C11D3/3907—Organic compounds
  • C11D3/391—Oxygen-containing compounds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
  • D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives

Definitions

• R represents H or alkyl of one to 12 carbon atoms.
• an inorganic peroxide bleaching composition containing an activating agent for increasing the bleaching power of .the inorganic peroxide bleaching agent at low temperatures, i
• Inorganic peroxide bleaching agents such as sodium perborate generally exhibit a very high bleaching effect at high temperatures above 80C
• their bleaching effect at low temperatures, particularly below 40C is very poor. Therefore, investigations have been made on improving the bleaching effect of inorganic peroxides at low temperatures and many activating agents have been proposed for this purpose.
• British Pat. No. 836,988 teaches ester compounds
• Japanese Pat. Publication No. 10165/1963 teaches compounds containing two or more acetyl groups bound to a nitrogen atom
• U.S. Pat. No. 2,362,401 teaches organic acid anhydrides
• U.S. Pat. No. 3,073,666 teaches alkyl phosphates
• British Pat. No. 802,035 teaches nitriles, all for this purpose.
• the prior art activating agents improve the bleaching effect, because they react with the inorganic peroxides in aqueous solution to form organic peracids which are more easily decomposed.
• these activating agents per se have no bleaching effect and, therefore, it is preferred that they exhibit their activating effects when employed in as low a concentration as possible.
• activating agents which are easily soluble in the aqueous bleaching liquor are desirable.
• excellent solubility of the activating agent is quite important.
• the activating agents per se and/or the organic peroxides formed in the bleaching solution do not emit an irritating odor.
• This invention provides a bleaching composition
• a bleaching composition comprising an inorganic peroxide capable of releasing hydrogen peroxide in an aqueous solutiomand.
• R is H or alkyl of l12 carbon atoms.
• ,B-Alkyllactones can be prepared generally by react ing aldehydes with ketenes:
• activating agents contained in the bleaching composition, of the present invention are B-alkyllactones of formula (1) in which R is H or alkyl of l4 carbon atoms.
• an activating agent in which R is H i.e., B'propiolactone, is especially preferred.
• inorganic peroxides which are capable of releasing hydrogen peroxide in an aqueous solution and which are contained in the bleaching composition of the present invention
• hydrogen peroxide and compounds which decompose in aqueous solution to release hydrogen peroxide such as sodium perborate, sodium percarbonate, sodium peroxypyrophosphate, sodium peroxysilicate and sodium peroxytripolyphosphate.
• B-alkyllactone to inorganic peroxide is most preferably such that the molar ratio of B-alkyllactone to hydrogen peroxide to be released in the aqueous solution is 1:1.
• this proportion is not critical. Generally, this proportion is from 10:1 to 1:10.
• the weight ratio of inorganic peroxide to B-alkyllactone is preferably in the range of 1:3 to 3:1 by weight.
• the bleaching composition of the present invention is used generally in a concentration of about 0.001 to 3 wt.%, preferably about 0.01 to 2 wt.%, of inorganic peroxide in the aqueous bleaching liquor.
• the bleaching composition of the present invention can be prepared in advance or immediately before the use.
• a surfactant a neutral or alkaline inorganic builder or other additives can be incorporated therein.
• surfactants there can be mentioned, for example, anionic surfactants such as sodium alkyl sulfates of 10 to 20 carbon atoms, sodium salts of higher fatty acids of 10 to 20 carbon atoms, sodium alkylbenzenesulfonates containing an alkyl group of 10 to 20 carbon atoms, sodium salts of polyoxyethylene alkyl ether sulfuric esters containing an alkyl group of 10 to 20 car bon atoms and sodium salts of polyoxyethylene alkylphenyl ether sulfuric esters containing an alkyl group of six to 10 carbon atoms; or nonionic surfactants such as polyoxyethylene alkyl ethers containing an alkyl group of 10 to 20 carbon atoms and polyoxyethylene alkylphenyl ethers containing an alkyl group
• neutral or alkaline inorganic builders there can be mentioned, for example, sodium sulfate, sodium carbonate, sodium bicarbonate, polyphosphates such as sodium pyrophosphate and sodium tripolyphosphate and sodium silicate.
• carboxymethyl cellulose As other additives, there can be mentioned carboxymethyl cellulose, fluorescent dyes and perfumes.
• adjuncts used in the bleaching composition of the invention can be selected from among those conventionally used for this purpose in accordance with conventional practice. Since the present invention does not concern any discovery relating to such adjuncts, further description of them is believed unnecessary.
• EXAMPLE 1 0.5 Part of each activating agent'listed in Table 1 was added to a bleaching solution consistingof 0.5 part of sodium perborate and 0.1 part'of sodium laurylsulfate dissolved in 100 parts of ion-exchanged water. Directly thereafter, a soiled cloth for the bleaching test was immersed in the solution and kept at C for 20 minutes. Then, the bleached cloth was washed with water and was air-dried. The reflectivity of the thus-treated cloth was determined with a spectrophotometer at 550 mu. The bleaching power was determined by the difference in reflectivity between the thus-treated cloth and the originalfsoiled cloth.
• the soiled cloth for the bleaching test was prepared by boiling a cotton cloth in black tea, followed by airdryirig, washing with water and ironing.
• test piece treated with the bleaching solution containing B-propiolactone had a higher whiteness than the other test piece.
• EXAMPLE 4 30 Parts of B-propiolactone were added and adsorbed to 70 parts of colloidal silica powders. Parts of this adsorbed mixture were mixed with 25 parts of sodium percarbonate, 25 parts of sodium tolypolyphosphate and 25 parts of sodium sulfate to obtain a bleaching composition in a dry powder form. 2.0 Parts of this bleaching composition were dissolved in 100 parts of ion-exchanged water. The bleaching power of this solution was determined by the same method as described in Example 1. It was 21.0.
• composition of the present invention is available not only as none(control) It is apparent from the above table that the activating agents of the present invention No 7 to No. 9 have an excellent activating ability.
• EXAMPLE 2 0.5 Part of ,B-butyrolactone (invention) or 'y-butyrolactone (control) was added to a bleaching solution consisting of 0.5 part of sodium percarbonate and 0.05 part of sodium dodecylbenzene sulfonate in 100 parts of ion-exchanged water. Directly thereafter, the same soiled cloth for the bleaching test as employed in Example l was immersed in the solution and kept at 40C for minutes.
• the bleaching powers (increase in reflectivity) of B-butyrolactone and 'y-butyrolactone were 25.8 and 10.5, respectively.
• the bleaching power of the bleaching solution containing no activating agent was 10.6.
• EXAMPLE 3 An underwear yellowed by use for a long period of time was cut into halves. One of the halves was immersed in a bleaching solution consisting of 0.1 part of hydrogen peroixde, 0.01 part of sodium salt of polyoxyethylene (2) lauryl e'ther sulfuric ester and 0.05 part of sodium tripolyphosphateand was kept at 10C for 30 minutes.
• the test panel aqueous solutions, but also in a dry powder or paste form.
• a bleaching composition comprising an inorganic peroxide capable of releasing hydrogen peroxide in aqueous solution and a compound of the formula in which R is H or alkyl of one to 12 carbon atoms.
• a bleaching composition in which the proportion of said compound to said inorganic peroxide is such that the molar ratio of hydrogen peroxide to said compound, in an aqueous solution of said bleaching composition is from 10:1 to 1:10.
• An aqueous bleaching liquor comprising an aqueous solution of the bleaching composition of claim 1 and containing from about 0.001 to 3 wt. 71. of said inorganic peroxide.

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Cited By (6)

Citations (4)

• 1972
  • 1972-10-20 JP JP47104974A patent/JPS4963671A/ja active Pending
• 1973
  • 1973-10-18 US US407591A patent/US3909438A/en not_active Expired - Lifetime
  • 1973-10-19 FR FR7337414A patent/FR2203900A1/fr not_active Withdrawn
  • 1973-10-19 DE DE19732352466 patent/DE2352466A1/de active Pending

Patent Citations (4)

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