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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/12—Water-insoluble compounds
  • C11D3/14—Fillers; Abrasives ; Abrasive compositions; Suspending or absorbing agents not provided for in one single group of C11D3/12; Specific features concerning abrasives, e.g. granulometry or mixtures
• • 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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
• • 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
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/32—Amides; Substituted amides
  • C11D3/323—Amides; Substituted amides urea or derivatives thereof
• • 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

Definitions

• the invention relates to low temperature bleaching compositions for hard surfaces containing inorganic per compounds, and to a process for the preparation of such bleaching compositions.
• the invention relates to scouring powder compositions containing inorganic per compounds such as perborates with an effective bleaching action at relatively low temperatures of eg 10-50 C., as well as at higher temperatures.
• Known low temperature bleaching compositions including scouring powder bleaching compositions, generally contain a chlorine releasing compound, such as dichlorocyanuric or trichlorocyanuric acid, which has the disadvantage of spreading a disagreeable chlorine smell which persists for some time after use, especially on the skin.
• a chlorine releasing compound such as dichlorocyanuric or trichlorocyanuric acid
• Another disadvantage connected with compositions based on chlorine bleaches is their instability in storage, resulting in a decrease of the bleaching effect.
• These disadvantages are not present to the same extent in bleaching compositions based on inorganic per compounds such as perborates.
• inorganic per compounds are relatively inactive bleaching agents at low temperatures of e.g. 10-50 C. Their bleaching effect increases with increasing temperatures and attains its maximum at the boil.
• Certain heavy metal ions e.g. Co are known to catalyse the bleaching action of inorganic per compounds and hence catalysts comprising these heavy metals have been suggested for incorporation in low temperature bleaching compositions containing inorganic per compounds, e.g. sodium perborate.
• metal ion catalysts especially cobalt catalysts.
• Many of these metal ions, e.g. Co tend to irritate the skin which makes them unsuitable for use in compositions that come into contact with the skin.
• Another disadvantage of such catalysts is that in order to obtain a stable product in a suitable form for incorporation in a composition, they have to be prepared in a rather complex and specific manner which results in the catalysts being expensive.
• coloured ions they tend to give the characteristic colour of the metal ion to the object bleached. It has been suggested to overcome this nuisance by the addition of certain chelating or complexing agents.
• compositions can be advantageously used for cleaning and stain-removing of various types of surfaces, viz. tile surfaces, porcelain objects, sinks, metal surfaces, etc. In the cleaning of metal surfaces they also effectively remove rust stains.
• the phosphates which can be suitably mixed with urea according to the invention could be any condensed phosphate, such as the alkali metal hexametaphosphates, pyrophosphates, tripolyphosphates, or an alkali metal orthoor metaphosphate, such as Na HPO Na PO Naand/or K-hexametaphosphate being most particularly suitable.
• condensed phosphate such as the alkali metal hexametaphosphates, pyrophosphates, tripolyphosphates, or an alkali metal orthoor metaphosphate, such as Na HPO Na PO Naand/or K-hexametaphosphate being most particularly suitable.
• the weight ratio of urea to alkali metal phosphate in the composition may be varied throughout a considerable range, but generally lies between 5:1 and 1:5, a ratio of approximately 1:1 giving the best results.
• the bleaching or scouring powder compositions may contain 120% of each of phosphate and urea, preferably 35% and 130% inorganic per compounds, preferably 5-20%. In addition they may also contain so-ealled fillers e.g. sodiumor aluminum sulphate, as well as alkaline building materials e.g. sodium silicate, sodium carbonate etc. Scouring powder compositions contain additional amounts of abrasive material, such as silica, feldspar, calcium carbonate and the like.
• composition according to the invention can be prepared by intimately mixing the substantially dry components in any conventional mixing apparatus.
• a proper amount of surface-active agent is added in order to give them an effective washing effect as well.
• other ingredients may be required, such as perfumes, germicidal substances, etc. These ingredients can be properly added in the last stages of the mixing operation.
• Example 1 Two scouring powder compositions were prepared containing sodium perborate, one of them with phosphate and urea. Table 1 gives the compositions.
• Example 2 Two scouring powder compositions containing sodium perborate were prepared, one only with sodium hexametaphosphate and the other only with urea.
• compositions were again tested at room temperature for the bleaching of tea stains on unglazed tiles in the same way as described in Example 1.
• compositions III and IV are not much better than composition 11 of Example 1.
• Example 3 The following compositions mentioned in Table 5 were tested in the same way as described in the previous examples, and the results are given in Table 6.
• compositions I, V and VI, according to the invention are much better than compositions II, III and What is claimed is:
• a powdered bleaching composition for hard surfaces consisting essentially of an inorganic perborate and an effective amount of an activator mixture for catalyzing the bleaching action of the inorganic perborate, the activator mixture consisting of urea and an alkali metal phosphate, the weight ratio of urea to alkali metal phosphate being between 5:1 and 1:5.

Landscapes

• 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)
• Cosmetics (AREA)
• Polishing Bodies And Polishing Tools (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10313559

Family Applications (1)

Country Status (11)

Cited By (1)

Citations (2)

• 0
  • NL NL131080D patent/NL131080C/xx active
• 1965
  • 1965-07-20 GB GB30814/65A patent/GB1120996A/en not_active Expired
• 1966
  • 1966-07-12 CH CH1011066A patent/CH478234A/de not_active IP Right Cessation
  • 1966-07-18 US US565748A patent/US3459669A/en not_active Expired - Lifetime
  • 1966-07-19 DE DE19661594876 patent/DE1594876A1/de active Pending
  • 1966-07-19 AU AU8467/66A patent/AU846766A/en not_active Expired
  • 1966-07-20 NL NL6610250A patent/NL6610250A/xx unknown
  • 1966-07-20 ES ES0329297A patent/ES329297A1/es not_active Expired
  • 1966-07-20 FR FR70170A patent/FR1487145A/fr not_active Expired
  • 1966-07-20 AT AT693766A patent/AT279003B/de not_active IP Right Cessation
  • 1966-07-20 LU LU51603D patent/LU51603A1/xx unknown
  • 1966-07-20 BE BE684422D patent/BE684422A/xx unknown

Patent Citations (2)

Also Published As

Similar Documents