Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
• • 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
  • C11D3/3947—Liquid compositions
• • 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
  • C11D3/3945—Organic per-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

Definitions

• the present invention relates to stable liquid diperoxyacid bleach compositions useful for bleaching fabrics, hard surfaces and other substrates.
• the compositions contain water-insoluble aliphatic diperoxyacid particles, C 11 -G 3 linear alkylbenzene sulfonate surfactant, cumene sulfonate as an optional ingredient, magnesium sulfate, sodium or potassium sulfate as an optional ingredient, and water.
• the compositions also have a pH of from 2 to 4.5 and a viscosity of from 50 to 1000 mPa ' s at 20 ° C.
• the ingredients are combined at certain carefully balanced levels and ratios, as hereinafter described, to provide compositions exhibiting good physical and chemical stability.
• U.S. Patent 3 996 152 Edwards et al, issued December 7, 1976, discloses stable, low-pH gels containing peroxyacid bleach particles and a non-starch thickening agent.
• the present invention relates to a stable liquid bleach composition
• a stable liquid bleach composition comprising, by weight:
• the liquid bleach compositions herein contain water-insoluble aliphatic diperoxyacid particles, C 1 -C 13 linear alkylbenzene sulfonate surfactant, cumene sulfonate as an optional ingredient, magnesium sulfate, sodium or potassium sulfate as an optional ingredient and water. These essential ingredients are combined at certain carefully balanced levels and ratios to obtain compositions having a high level of peroxyacid bleach, low product viscosity, and good physical and chemical stability.
• the compositions generally remain as stable suspensions having little or no separation of ingredients during storage, preferably for as long as 2 months at room temperature.
• the compositions also have chemical (i.e., peroxyacid) stability of at least about 80%, with the preferred compositions having at least about 90% stability after 2 months storage at room teperature.
• compositions of the present invention have a pH of from 2 to 4.5, preferably from 2.5 to 4, most preferably from 3 to 3.5, when measured at 20 ° C for best peroxyacid bleach stability.
• compositions also have a viscosity of from 50 to 1000 mPa ' s to, preferably from 60 to 750 mPa ⁇ s, more preferably from 75 to 500 mPa ⁇ s, and most preferably from 100 to 350 mPa-s, at 20 ° C, when measured with an LTV Brookfield Viscometer, using a No. 3 spindle and a setting of 60 rpm.
• This relatively low viscosity is desired for convenient pouring from a container by the user.
• compositions of the present invention contain from 10% to 25%, preferably from 12% to 22%, more preferably from 14% to 20%, most preferably from 15% to 20%, by weight, of water-insoluble diperoxyacid particles of the formula HOOOC(CH 2 )nCOOOH, wherein n is from 7 to 14, preferably from 8 to 12.
• the particles have an average size of from 0.5 to 15, preferably from 0.5 to 10, micrometers.
• a particularly preferred material is 1,12-diperoxydodecanedioic acid (DPDA).
• compositions contain from 2% to 6%, preferably from 2% to 4%, by weight on an acid basis, of a water-soluble (e.g., alkayli metal, ammonium or alkylolammonium) C 11 -C 13 linear alkylbenzene sulfonate surfactant.
• a water-soluble (e.g., alkayli metal, ammonium or alkylolammonium) C 11 -C 13 linear alkylbenzene sulfonate surfactant e.g., alkayli metal, ammonium or alkylolammonium) C 11 -C 13 linear alkylbenzene sulfonate surfactant.
• alkylbenzene sulfonate contributes to physical stability by dispersing the peroxyacid particles.
• alkylbenzene sulfonates since it also increases product viscosity, particularly when used at higher levels within the claimed range and when shorter carbon chain (e.g., Ci1 or 0 12 ) alkylbenzene sulfonates are selected, the type and level of alkylbenzene sulfonate must be selected along with the other ingredients herein to provide the desired viscosity.
• the c 13 alkylbenzene sulfonates are particularly preferred.
• compositions can also contain from 0% to 8%, preferably from 1% to 6%, most preferably from 2% to 5%, by weight on an acid basis, of a water-soluble (e.g., alkali metal, ammonium or alkylolammonium) cumene sulfonate.
• Cumene sulfonate also functions as a dispersant for the peroxyacid particles, and it significantly decreases viscosity. It thus can serve as a thinning agent and as a partial replacement for the C 11 -C 13 linear alkylbenzene sulfonate surfactant.
• the cumene sulfonate represents from 0% to 4%, preferably from 1% to 3%, by weight on an acid basis, of the composition.
• the bleach compositions herein further contain from 5% to 15%, preferably from 8% to 12%, by weight, of magnesium sulfate.
• the magnesium sulfate helps to suspend the diperoxyacid particles via density matching in range of from 1.15 to 1.22 g/ml.
• Magnesium sulfate also functions as an effective exotherm control agent in the present compositions.
• compositions further contain from 0% to 7%, preferably from 2% to 6%, by weight, of sodium sulfate or potassium sulfate.
• sodium and potassium sulfate, and to a lesser extent the cumene sulfonate can be used to help match the density of, and thereby suspend, the peroxyacid particles.
• Mixtures of sodium or potassium sulfate, cumene sulfonate and magnesium sulfate are preferred to avoid adding excessive magnesium hardness to the wash water.
• the mixture of these salts also appears to be more effective at physically stabilizing the peroxyacid particles since less of the mixture is required to stabilize the composition than when magnesium sulfate alone is used.
• sodium and potassium sulfate significantly increase viscosity, and so their use must be limited to meet the desired viscosity range.
• compositions contain from 40% to 78%, preferably from 50% to 70%, by weight, of water.
• the C 11 -C 13 alkylbenzene sulfonate and cumene sulfonate together should represent from 3% to 14%, preferably from 4% to 12%, most preferably from 4% to 10%, by weight, of the composition to provide sufficient dispersant for the peroxyacid particles while maintaining the desired low viscosity.
• the C 11 -C 13 alkylbenzene sulfonate and cumene sulfonate together represent from 3% to 10%, preferably from 3% to 8%, most preferably from 3.5% to 6%, by weight of the composition.
• the magnesium sulfate and sodium or potassium sulfate should represent from 5% to 16%, preferably from 8% to 16%, more preferably from 10% to 15%, by weight of the composition in order to adequately suspend the peroxyacid particles.
• the weight ratio of magnesium sulfate to sodium or potassium sulfate is preferably from 1:1 to 4:1, more preferably from 2:1 to 3:1, for the desired combination of exotherm stability, low wash water hardness, and low viscosity.
• the C ii -C i3 alkylbenzene sulfonate, cumene sulfonate, magnesium sulfate and sodium or potassium sulfate together should represent from 12% to 30%, preferably from 12% to 25%, more preferably from 14% to 25%, most preferably from 14% to 20%, by weight of the composition to provide sufficient dispersing and suspending agents.
• the weight ratio of diperoxyacid particles to magnesium sulfate should also be less than 3:1, preferably less than 2.5:1, for best exotherm stability.
• bleaching compositions of the present invention can, of course, be employed by themselves as bleaching agents. However, such compositions will more commonly be used as one element of a total bleaching or laundering composition.
• Bleaching compositions herein can contain any of the optional ingredients known for use in such compositions.
• compositions herein can contain minor amounts, generally less than 5%, preferably less than 2%, most preferably less than 1%, by weight, of other synthetic surfactants, such as other anionic, nonionic, cationic and zwitterionic surfactants, or mixtures thereof, known in the art
• additional surfactants particularly nonionic and cationic surfactants
• the compositions are substantially free of such other surfactants.
• the compositions herein generally contain less than 2%, preferably less than 1%, by weight, of other anionic synthetic surfactants.
• the compositions are essentially free of such other anionic synthetic surfactants.
• the peroxyacid compounds used in the compositions of the present invention are subject to the loss of available oxygen when contacted by heavy metals, it is desirable to include a chelating agent in the compositions.
• a chelating agent is preferably present in an amount ranging from 0.005% to 1.0% by weight of the composition.
• the chelating agent can be any of the well-known agents, including those described in U.S. Patent 3 442 937, issued May 6, 1969 to Sennewaid et al., U.S. Patent 2 838 459, issued July 10, 1958 to Sprout, Jr. , and U.S. Patent 3 192 255, issued June 29, 1965 to Cann.
• Preferred chelating agents are picolinic acid and dipicolinic acid.
• Bleaching compositions of the present invention are utilized by adding them to water in an amount sufficient to provide from 1.0 ppm to 100 ppm, preferably from 1.0 ppm to 50 ppm, available oxygen in solution. Generally, this amounts to 0.01% to 0.4%, preferably from 0.01% to 0.2%, by weight of composition in solution. Fabrics to be bleached are then contacted with such aqueous bleaching solutions.
• compositions of the present invention can also be used in combination with conventional fabric laundering detergent compositions.
• Such compositions can contain standard detergent ingredients, such as the surfactants and builders described in U.S. Patent 4 100 095, Hutchins et al., issued July 11, 1978.
• Preferred detergent compositions are described in U.S. Patent 4 561 998, Wertz, et al., issued December 31, 1985, and U.S. Patent 4 507 219, Hughes, issued March 26, 1985.
• detergent compositions formulated for use with bleaching compositions herein have a pH of from 9 to 12, preferably from 9.5 to 11.5, more preferably from 10 to 11. They preferably contain from 2% to 15%, more preferably from 4% to 10%, by weight, of monoethanolamine.
• the combination of such an alkaline composition with a bleaching composition herein preferably delivers a wash water pH of from 7.8 to 9, preferably from 7.9 to 8.5, which is desired for good bleaching performance, a minimum of fabric yellowing, and a minimum of bleach decomposition by the monoethanolamine.
• the following composition was prepared by high shear mixing of the components in an Eppenbach mixer while in an ice bath.
• the DPDA and water were added to the mixer before turning the mixer on.
• the suds suppressor was added to minimize foaming while mixing and to minimize air entrapment in the finish composition.
• the other components were added in the order listed at the indicated times after turning on the mixer.
• the pH of the composition was determined to be 3.20 at 20 ° C. After 4 hr. 10 min., the pH was again determined to be 3.20 at 20°C and the mixer was turned off.
• the composition was a stable suspension of the ingredients. It has a viscosity of about 350 mPa ⁇ s at 20 ° C.
• the DPDA had an average particle size of 2-5 micrometers.
• the original composition was transferred, along with 5 other samples of similar composition and preparation, to a 55 gallon (about 200 liters) drum and mixed by hand.
• the mixture was analyzed to contain 18.29% DPDA. It had a viscosity of about 350 mPa ' s, a density of 1.187 g/ml, and a pH of 3.20, all measured at 20 ° C.
• samples of the mixture were placed in storage at 40 ° F (4.44 ° C), 50 ° F (10 ° C), 70 ° F (21.1 ° C), 90 ° F (32.2 ° C) and 100 ° F (37.8 ° C).
• the above composition is preferably used in combination with the following detergent composition.
• the detergent composition was prepared by adding the following components to a mixing tank in the order listed with continuous mixing.
• the compositions are preferably used in a volume ratio of detergent composition to liquid bleach of 5.5:1.
• the detergent composition is designed for a usage level of about 0.55 cups (about 140 ml) in a typical U.S. laundering process. This delivers a concentration of product in the wash water of about 0.22% by weight. Usage of about 0.1 cups (i.e., about 25 ml) of the liquid bleach would deliver about 10 ppm of available oxygen to the wash water.
• the detergent composition and liquid bleach are preferably simultaneously codispensed from a dual compartment bottle at a volume ratio of detergent to bleach of 5.5:1.
• the mixture of the succinate and fatty acid builders in the above detergent composition is preferred because it causes less fabric yellowing and measuring cup residue than an all fatty acid formula when used with the above liquid bleach.
• compositions of the present invention which can be prepared as in Example I, are as follows:
• the composition had a viscosity of about 850 mPa ' s measured at 20 ° C.
• An additional 6.4 parts of sodium cumene sulfonate (50% active) was added to 100 parts of the composition to reduce its viscosity to about 240 mpa ⁇ s at 20 ° C.
• This composition had a pH of 2.6. Its pH was adjusted to 3.15 by adding a 50% solution of sodium hydroxide, resulting in a finished liquid bleach composition containing 15.5% DPDA.
• the above liquid bleach composition is preferably used in combination with the following liquid detergent composition, which was prepared by adding the components to a mixing tank in the order listed with continuous mixing.
• the compositions are preferably used in a volume ratio of detergent composition to liquid bleach of 4:1.
• the detergent composition is designed for a usage level of about 0.5 cups (about 125 ml) in a typical U.S. laundering process. This delivers a concentration of product in the wash water of about 0.2% by weight. Usage of about 0.125 cups (i.e., about 30 ml) of the liquid bleach would deliver about 10 ppm of available oxygen to the wash water.
• the detergent composition and liquid bleach are preferably simultaneously codispensed from a single dosing, dual compartment cup at a volume ratio of detergent to bleach of 4:1.

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

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• 1987
  • 1987-03-30 KR KR1019870002921A patent/KR940006254B1/ko not_active IP Right Cessation
  • 1987-03-30 CA CA000533362A patent/CA1294510C/en not_active Expired - Lifetime
  • 1987-03-30 AU AU70761/87A patent/AU600263B2/en not_active Expired
  • 1987-03-30 GB GB08707571A patent/GB2188654A/en not_active Withdrawn
  • 1987-03-30 IE IE81487A patent/IE60011B1/en not_active IP Right Cessation
  • 1987-03-31 JP JP62076554A patent/JP2528867B2/ja not_active Expired - Lifetime
  • 1987-03-31 MX MX005810A patent/MX172458B/es unknown
  • 1987-03-31 EP EP87870040A patent/EP0240481B1/en not_active Expired - Lifetime
  • 1987-03-31 DE DE8787870040T patent/DE3763424D1/de not_active Revoked
• 1990
  • 1990-09-14 GR GR89400314T patent/GR3000789T3/el unknown
• 1992
  • 1992-09-29 SG SG998/92A patent/SG99892G/en unknown
  • 1992-12-24 HK HK1046/92A patent/HK104692A/xx unknown

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