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
  • C11D3/395—Bleaching agents
  • C11D3/3953—Inorganic bleaching 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/75—Amino oxides
• • 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 PRESENT INVENTION relates to bleaching and cleaning compositions containing hypochlorite and in particular to thickened bleach compositions, that is compositions having an increased viscosity as compared with straight aqueous solutions of alkali metal hypochlorite.
• Thickened bleach compositions have a number of advantages over unthickened bleach compositions in that the more viscous compositions adhere more readily and for a longer time to vertical and inclined surfaces than do the unthickened compositions.
• the performance of thickened bleach compositions is therefore superior to that of unthickened bleach compositions for vertical and inclined surfaces such as are found in lavatory pans, urinals, drains, waste pipes and the like.
• thickened bleach compositions for example compositions having viscosities at 25°C of greater than 10 centistokes, by the addition of suitable thickening agents.
• British Patent Specification No. 1,329,086 describes thickened aqueous alkali metal hypochlorite compositions which contain in addition to the hypochlorite, an alkali metal salt of a C 8 to C 18 fully saturated fatty acid and a hypochlorite-soluble surface active agent, the latter being exemplified by an amine oxide containing a C 8 to C 18 alkyl group.
• the amine oxides described in the specification are those commercially available which are derived from naturally occuring'C 8 to C 18 fatty acids, for example coconut acids, lauric acid and myristic acid.
• British Patent Specification No. 1,466,560 describes thickened aqueous alkali metal hypochlorite compositions in which the thickening is achieved by mixing hypochlorite solutions with combinations of certain sarcosinate or tauride surfactants with one or more other surfactants which may comprise certain soaps, quaternary ammonium compounds, amine oxides, betaines and/or alkanolamides.
• British Patent Specification No. 1,584,379 describes thickened bleach compositions comprising an aqueous solution of an alkali metal hypochlorite containing (a) a sucrose surfactant consisting of one or more esters of a long chain fatty acid with sucrose and (b) another hypochlorite-soluble surfactant, for example a quaternary ammonium compound, an amine oxide, a betaine or an alkanolamide.
• a sucrose surfactant consisting of one or more esters of a long chain fatty acid with sucrose
• another hypochlorite-soluble surfactant for example a quaternary ammonium compound, an amine oxide, a betaine or an alkanolamide.
• British Patent Specification No. 2,051,162A describes thickened aqueous alkali metal hypochlorite compositions which contain, in addition to the hypochlorite; an amine oxide and an alkali metal alkyl sulphate,
• British Patent Specification No. 2,003,522A describes thickened aqueous alkali metal hypochlorite compositions which contain a C 8 to C 20 branched chain amine oxide or a mixture of such amine oxides or a mixture of such a branched chain amine oxide with a straight chain amine oxide.
• thickened bleaches containing a single compound as the thickening agent have been described (see for example British Patent Specification No. 2,003,522A hereinbefore mentioned) it has been found to be economically advantageous to employ at least two, generally organic, compounds as thickening agents for the aqueous hypochlorite solution.
• a typical and well-known example is that described in U.K. Specification No. 1,329,086 in which thickening is achieved by a combination of a soap and an amine oxide in specified proportions.
• the present invention provides a thickened bleach composition
• a thickened bleach composition comprising water, an alkali metal hypochlorite, and an organic thickening agent which consists solely of a straight chain amine oxide or a mixture of straight chain amine oxides wherein the or at least one amine oxide has at least 14 carbon atoms in the straight chain.
• the organic thickening agent should consist of a substantially pure C 14 or, preferably, C 15 straight chain amine oxide alone.
• Compositions according to this invention contain no significant amounts of organic thickening agent other than straight chain amine oxide.
• Straight chain amine oxides containing more than 15 carbon atoms in the straight chain have limited solubility in alkali metal hypochlorite solutions. However, they can be incorporated in thickened bleach compositions provided that suitable solubilising agents are employed. We have found that straight chain amine oxides containing less than 16 carbon atoms in the straight chain can be used for this purpose.
• thickened bleaches according to this invention can contain additional components frequently incorporated in such compositions including caustic alkali, alkali metal salts, perfume and colourants.
• compositions according to this invention may include caustic alkali, for example sodium hydroxide, and/or an alkali metal salt, for example sodium chloride, each being present preferably in an amount of 0.5 to 5% be weight.
• a perfume and/or a colourant may also be present in the composition.
• the bleach compositions of this invention preferably contain an amount of available chlorine in the range 1 to 15%, preferably 5 to 10% by weight.
• compositions of this invention preferably have a viscosity of at least 10 centistokes at 25°C, measured with an Ostwald viscometer and a cloud point in excess of 35°C.
• compositions were prepared by mixing sodium hypochlorite, to give an available chlorine level of 8%, sodium hydroxide, sodium chloride and a single C 12 to C 18 straight chain amine oxide in cold water.
• composition A containing no amine oxide was also prepared for comparative purposes. Details of the compositions, their viscosities and cloud points are shown in Table 1.
• a number of thickened bleach compositions were prepared by mixing sodium hypochlorite, to give an available Chlorine level of 8X, sodium hydroxide, sodium chloride and mixtures of C 12 , C 14 and C 16 straight chain amine oxides in cold water. Details of the compositions and their properties are shown in Table 2 and the results illustrate the solubilising effect of lower straight chain amine oxides on formulations containing C 16 straight chain amine oxides.
• the examples show that technically and economically acceptable thickened bleaches can be prepared using a single organic thickeneing agent (the agent comprising a single straight chain amine or a mixture of straight chain amine oxides with no other organic thickener present) in contrast to those at present on the market which generally contain at least two organic thickening agents.
• the examples illustrate that acceptable thickening can be achieved using amine oxide in which the alkyl group is wholly a straight chain group.

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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)
• Medicinal Preparation (AREA)

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• 1983
  • 1983-10-24 EP EP83306440A patent/EP0110544A1/fr not_active Withdrawn
  • 1983-10-28 NZ NZ206092A patent/NZ206092A/en unknown
  • 1983-10-28 AU AU20804/83A patent/AU562925B2/en not_active Ceased
  • 1983-11-01 DK DK500783A patent/DK500783A/da not_active Application Discontinuation
  • 1983-11-01 NO NO833979A patent/NO833979L/no unknown
  • 1983-11-02 JP JP58206823A patent/JPS5998200A/ja active Granted

Patent Citations (3)

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