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
  • C11D3/40—Dyes ; Pigments
  • C11D3/42—Brightening agents ; Blueing agents
• • 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
  • C11D3/395—Bleaching agents
  • C11D3/3956—Liquid compositions

Definitions

• the invention pertains to aqueous hypochlorite bleach products which contain optical brighteners.
• Sodium hypochlorite is a highly effective bleaching agent and has long been used in conjunction with soaps and detergents to remove stains and other types of soils in the laundering of fabrics. It is generally formulated at a concentration of about 4-8% in water for sale for household use, where it is typically diluted to a concentration of about 200 ppm sodium hypochlorite for laundry bleaching.
• Optical brighteners are dyes which are absorbed by fabrics and impart to the fabric an added increment of whitenessl brightness by means of their ability to absorb invisible ultraviolet radiation and re-emit it as visible radiation. Optical brighteners have been included as a component in laundry products for many years.
• optical brighteners are subject to chemical attack by hypochlorite in solution, and their brightening effect is considerably diminished when used in conjunction with hypochlorite in laundering of fabrics. However, some optical brighteners have been developed which are resistant to hypochlorite attack.
• Optical brighteners are generally insoluble in concentrated hypochlorite, and tend to quickly settle to the bottom of an aqueous hypochlorite product.
• simple addition of optical brightener to concentrated aqueous hypochlorite results in a product which must be vigorously shaken each time before use. Because of the tendency for rapid settling, even vigorous shaking before each use does not necessarily always result In the obtaining of uniform proportions of brightener and hypochlorite In each use.
• U.S. Patent Application Ser. No. 649,457, Hensley & Kitko, filed Sept. 11, 1984, is directed to the formulation of aqueous sodium hypochlorite compositions containing a fine dispersion of a bleach stable optical brightener.
• the compositions comprise sodium hypochlorite, optical brightener, 4,4'-bis(4-phenyl-2H-1,-2,3-triazol-2-yl)-2,2'-stilbenedisulfonate, certain alkylaryl sulfonate surfactants, and water.
• the optical brightener is present in the composition in the form of a dispersion of fibrous particles having diameters of from about 0.01 to about 1.5 microns. This type of composition is cloudy.
• the bleach stable optical brightener 4,4'-bis(4-phenyl-2H-1,2,3-triazol-2-yl)-2,2'-stifbenedisulfonic acid can be solubilized with amine oxide to provide a substantially clear and stable aqueous sodium hypochlorite brightener solution.
• compositions of the invention comprise:
• sodium hypochlorite is commercially available in aqueous solutions having a concentration of from 5% to
• compositions of the present invention typically contain an equimolar amount of sodium chloride.
• sodium hypochlorite solution it is generally desirable to add sodium hypochlorite solution to the brightener/surfactant solution in volumes such that the volume of sodium hypochlorite will be from 0.4 to 8 times the volume of the brightener/surfactant solution.
• the aqueous sodium hypochlorite source chosen for preparing a composition of the invention should be one which has a sodium hypochlorite concentration such that it can be mixed with the aqueous brightener/surfactant solution within these volume proportions to produce the desired amounts of sodium hypochlorite, brightener and surfactant in the finished product.
• Sodium hypochlorite is present in the compositions of the . invention at levels of from 3% to 8%, preferably from 4% to 7%.
• the brightener used in the compositions herein is 4,4'- bis(4-phenyl-2H-1,2,3-triazol-2-yl)-2,2'-stilbenedisulfonic acid', or its salts.
• the structure of the sodium salt is:
• This optical brightener is available from Mobay Chemical Corporation, a subsidiary of Bayer AG, under the name Phorwite R CNA.
• the optical brightener is present in the compositions of the invention at levels of from 0.025% to 0.2%, preferably from 0.05% to 0.2%, and most preferably from 0.05% to 0.075%.
• the surfactants used in the present invention are selected from the group consisting of amine oxides having the following molecular structures: wherein R 1 is a C 8 -C 18 (preferably C 10 -C 16 ) saturated alkyl group; R 2 and R 3 are C 1 -C 12 (preferably C 1 -C 3 ) saturated alkyl groups.
• the surfactants are present in the compositions herein at levels of from 0.5% to 2.0%, preferably from 0.8% to 1.5%.
• Preferred amine oxide compositions from a practical stand- - point useful in the practice of the present invention are the commercially available (1) dimethyl "cocoamine” oxide (a mixture which is dominated by dimethyl-C 12 -C 16 straight chain alkyl amine oxide, more particularly a mixture containing approximately 70% C 12 straight chain alkyl dimethyl amine oxides, approximately 25% C 14 of straight chain alkyl dimethyl amine oxides and approximately 4% C16 straight chain alkyl dimethyl amine oxides) and (2) N-cocomorpholine oxide, a mixture dominated by C 12 -C 16 straight chain alkyl morpholine oxides (specifically containing approximately 70% C 12 straight chain alkyl morpholine oxide, approximately 25% C 14 straight chain alkyl morpholine oxide and approximately 4% C16 straight chain alkyl morpholine oxide).
• dimethyl "cocoamine” oxide a mixture which is dominated by dimethyl-C 12 -C 16 straight chain alkyl amine oxide, more particularly a mixture containing approximately 70% C 12 straight
• amine oxide compositions are: Aromox DMC-W and Aromox DMMC-W which are 30% aqueous dimethyl cocoamine oxide solutions and Aromox NCMDW which is a 40% aqueous N-cocomorpholine oxide solution, each of which is produced by the Armac Division of AKZO of Chicago, Illinois. These materials are described in Brochure 68011, published by Armour Industrial Chemicals, Chicago, Illinois 60609. Other preferred amine oxides are n-undecyl dimethyl amine oxide and n-tridecyl dimethyl amine oxide.
• Another commercially available amine oxide is Snyprolam 35 DMO, a dimethyl-C 13 -C 15 straight chain amine oxide.
• perfumes can be present in the compositions of the invention at levels of from 0% to 0.5%, preferably from
• perfume materials used should, of course, have a high degree of chemical stability to sodium hypochlorite.
• Some preferred materials for use as perfume ingredients in the compositions herein are patchouli oil, cyclopenta- decanolide, p-tertiarybutyl cyciohexyl acetate, tetrahydromycenol, tetrahydrolinalool, phenylacetaldehyde dimethylacetal, methylphenyl carbinol, and mixtures thereof.
• perfume materials have been found to function as antifoamants for the compositions herein, thereby facilitating processing and high-speed packing of the compositions.
• perfume materials are:
• perfumes When perfumes are used in the compositions herein they are preferably mixed into the solution of brightener and surfactant prior to the addition of aqueous sodium hypochlorite to the solution.
• perfume usage is toward the upper end of the usage range (i.e., 0.3% to 0.5%) then it is usually necessary to use an amount of surfactant which is also at the higher end of the 0.5% to 2% surfactant usage range hereinbefore disclosed.
• Organic oils other than those mentioned under examples of perfume materials can also be used in order to mask the chlorine smell.
• a preferred organic oil is linear alkylbenzene (LAB) having alkyl chains of from 10 to 14 carbon atoms.
• compositions of the invention can be prepared by first preparing an aqueous solution containing the brightener and the surfactant;
• perfume is to be used in the composition, it is added to the aqueous solution of brightener and surfactant.
• compositions herein should - have a pH above 12, preferably about 12.5.
• the pH of the composition should be tested after preparation Is complete. If needed, pH adjustment can be made with acid or base (e.g., HCI or NaOH).
• the brightener is dissolved in distilled water, gently heating if required.
• the surfactant Is added with stirring.
• the diluted bleach is added.
• the brightener is completely dissolved.
• the composition is visibly clear and surprisingly exhibits UV fluorescence on fabrics washed therein. The composition was stored for several months and UV fluorescence was seen on fabrics washed therein.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)

Applications Claiming Priority (2)

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Family Applications (1)

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Cited By (6)

Citations (4)

• 1985
  • 1985-12-12 DE DE8585309028T patent/DE3585512D1/de not_active Expired - Fee Related
  • 1985-12-12 EP EP19850309028 patent/EP0186386B1/fr not_active Expired

Patent Citations (4)

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