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
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
  • C11D3/3761—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in solid 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

Definitions

• the present invention relates to granular bleach compositions comprising an organic peroxycarboxylic acid as the active bleaching agent.
• Granular bleach compositions which comprise an organic peroxycarboxylic acid as the active bleaching agent are known in the art.
• organic peroxycarboxylic acids as bleaching agents are diperphthalic acid, diperisophthalic acid, diperoxysebacic acid, diperoxytetradecanedioic acid, diperoxydodecanedioic acid, peracetic acid, peroctanoic acid, peradamantoic acid, diperbrassylic acid and so on.
• the invention will be described with particular reference to a preferred peroxycarboxylic acid, namely diperoxydodecanedioic acid (DPDA), it being understood however that this does not imply a limitation, other organic peroxycarboxylic acids as discussed above equally being usable in the present invention.
• the DPDA used in the present invention is usually in the form of dry granules, containing an inert carrier material such as sodium sulphate. In general, these granules contain from 5 - 45% DPDA, usually from 10 - 40% and preferably 12 - 37%.
• the balance of the granules consists mainly of the inert carrier material as well as of minor amounts of surfactants, stabilizing agents and other exotherm control agents.
• the mean particle size of the granules should be larger than 500 microns, and should preferably range between 800 and 1200 microns.
• the fully neutralized carboxylated polymers of the invention are alkali-soluble carboxylated polymers or copolymers of which the carboxy groups have been neutralized with a suitable neutralizing agent to the corresponding salts.
• Suitable salts are the alkalimetal, the alkaline earth metal and the aluminum salts.
• the alkalimetal salts are preferred.
• Suitable examples of carboxylated polymers, copolymers and homopolymers useful in the present invention when in their fully neutralized form are given in US Patent 4,759,956.
• Particularly suitable fully neutralized carboxylated polymers are alkalimetal polyacrylates, alkalimetal polymethacrylates, alkalimetal salts of copolymers of acrylic acid or methacrylic acid with maleic anhydride or styrenic monomers or alkylacrylates or mixtures thereof.
• Typical examples are sodium polyacrylate; copolymers of alkylacrylates, such as butylacrylate, styrenic monomers such as styrene and alkalimetal(meth) acrylates, fully neutralized copolymers of alkalimetal (meth)acrylates with maleic anhydride, and so on.
• Representative examples are the commercial products A-1N, a sodium polyacrylate ex.
• the fully neutralized fatty acids used in the present invention, are the alkalimetal, alkaline earth metal or aluminium salts of C10-C32, preferably C12-C22 saturated or unsaturated, natural or synthetic fatty acids. Preferred are the alkalimetal, particularly the sodium salts of C12-C18 saturated fatty acids. Polymerized fatty acids can also be used.
• the amount of fully neutralized carboxylated polymer or fatty acid to be used in the present invention is dependent upon the level of the organic peroxycarboxylic acid, present in the granule.
• the weight ratio of the organic peroxycarboxylic acid to the fully neutralized carboxylated polymer or fatty acid ranges from 5:1 to 1:5, preferably from 2:1 to 1:2.
• the organic peroxycarboxylic acid and the fully neutralized carboxylated polymer or fatty acid should be in intimate contact in order to get the maximum reduction of the tendency of the peroxycarboxylic acid to undergo thermal decomposition. Such intimate contact can be achieved by simply dry-blending the ingredients, or dusting the granular peroxycarboxylic acid with the fully neutralized carboxylated polymer or fatty acid.
• a preferred way of achieving the intimate contact is coating the granular peroxycarboxylic acid with a layer of the fully neutralized carboxylated polymer or fatty acids in manners, know per se., e.g. by spraying the fully neutralized carboxylated polymer or fatty acid onto a fluidized bed of the granular peroxycarboxylic acid. If the fully neutralized carboxylated polymer or fatty acid is sprayed in the form of an aqueous solution or dispersion, it may be advantageous to pre-mix the granular peroxycarboxylic acids with an alkaline, hydratable inorganic salt which will then take up the water of the aqueous solution or dispersion as water of hydration.
• the granular bleach compositions of the invention can be used as such or as ingredients in detergent cleaning and bleaching compositions for fabrics.
• Such cleaning and bleaching compositions incorporating the granular bleach compositions in an amount of up to 50% usually contain one or more detergent-active materials, builders and other adjuvants commonly present in such compositions.
• they may contain from 1 to 40, usually from 2 to 35 and preferably from 5 to 30% by weight of an anionic, a nonionic, a cationic and/or zwitterionic detergent-­active material, all of which are well-known in the art. Suitable examples thereof are fully described in Schwartz, Perry and Berch, "Surface-Active Agents and Detergents", Vol. I (1949) and Vol. II (1958).
• compositions may furthermore comprise up to 55% of one or more organic and/or inorganic builders, such as alkalimetal carbonates, alkalimetal citrates, alkalimetal nitrilotriacetates, zeolites, mixtures of alkalimetal carbonates with calcites, alkalimetal ortho-, pryo- and polyphosphates and so on.
• organic and/or inorganic builders such as alkalimetal carbonates, alkalimetal citrates, alkalimetal nitrilotriacetates, zeolites, mixtures of alkalimetal carbonates with calcites, alkalimetal ortho-, pryo- and polyphosphates and so on.
• compositions may furthermore comprise optional other detergent ingredients in amounts, commonly used in detergent compositions, such as lather boosters, foam depressors, anti-corrosion agents, soil-suspending agents, sequestering agents, anti-soil redeposition agents, perfumes, dyes, enzymes such as proteases, amylases, cellulases and lipases, bleach precursors, etc.
• detergent compositions such as lather boosters, foam depressors, anti-corrosion agents, soil-suspending agents, sequestering agents, anti-soil redeposition agents, perfumes, dyes, enzymes such as proteases, amylases, cellulases and lipases, bleach precursors, etc.
• compositions are preferably formulated in particulate forms, but other forms such as pastes, liquids, bars, cakes, etc. can also be used.
• the granular bleach compositions of the invention are added to the particulate detergent composition by simply admixing them with the particulate composition.
• the apparatus used in measuring the Autoignition Temperature consisted of a 31.5 O.D. mm by 175 mm capped steel pipe inserted into a heating mantle (Type 0-610, 325 Watt) containing sand.
• the sample was placed into a 25 x 200 mm Pyrex glass tube and a thermocouple, shielded inside in a 6.25 O.D. mm glass tube, was inserted into the center of the sample.
• the glass tube containing the sample was then placed into the steel pipe.
• the heating mantle controlled with a Powerstat (Type 3PN117C) to give a 2°C/min heating rate, was turned on.
• the temperature of the sample versus time was recorded.
• the autoignition temperature was taken as the point at which the sample ignited, as indicated by the sharp change in sample temperature.
• the sample tested contained 80 parts of ground DPDA-granules, containing 20% by weight of DPDA and 80% by weight of sodium sulphate. Where an agent was added, this was added in an amount of 20 parts the addition being effected by dry-blending.
• Agent AT in °C
• 127 Sodium laurate none Lauric acid
• 132 Sodium stearate none Stearic acid 116
• DPDA granules containing 22% DPDA, 77% sodium sulphate and 1% polyacrylic acid as binder, the granules having a mean particle size of 630 microns, were charged into a fluidized bed in an amount of 1 kilogram.
• the product temperature reached the temperature for proper drying, i.e. 30-60°C, 1 kilogram of the Rohm and Haas copolymer WS-24, (36% solids) identified heretofore, was sprayed onto the granules at a rate of 10 ml/min.
• the granules, coated with 21% of the fully neutralized copolymer were then subjected to the autoignition test. They did not autoignite.

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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)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

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Citations (7)

• 1989
  • 1989-11-28 EP EP19890203023 patent/EP0373691A3/fr not_active Withdrawn
  • 1989-12-11 CA CA002005176A patent/CA2005176A1/fr not_active Abandoned
  • 1989-12-13 AU AU46709/89A patent/AU4670989A/en not_active Abandoned
  • 1989-12-14 JP JP1324860A patent/JPH02258898A/ja active Pending
  • 1989-12-15 BR BR898906487A patent/BR8906487A/pt unknown
  • 1989-12-15 ZA ZA899617A patent/ZA899617B/xx unknown

Patent Citations (7)

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