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
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3902—Organic or inorganic per-compounds combined with specific additives
  • C11D3/3937—Stabilising agents

Definitions

• the present invention relates to stabilizing compositions for peroxidized products, in particular when they are used in the bleaching and bleaching of fibers and textile fabrics. These stabilizing compositions are especially intended for household and industrial detergents.
• Most household detergents contain a peroxidized compound, such as sodium perborate or sodium percarbonate, which has the effect of improving the elimination of many stains and restoring the linen to its original whiteness thanks to its whitening effect.
• a peroxidized compound such as sodium perborate or sodium percarbonate
• the textile industry generally uses baths comprising a peroxidized compound, such as hydrogen peroxide or sodium perborate for the bleaching of unbleached textiles.
• This stabilizing effect can be obtained by the addition, to the washing bath, of magnesium silicate which slows down the rate of decomposition of the peroxidized compound.
• the magnesium silicate makes it possible to keep in the bleaching bath the maximum of active oxygen beyond a temperature of the order of 60 ° C., from which the peroxidized compound will reach its full efficiency.
• the magnesium silicate is added to the detergent either preformed or formed "in situ from sodium silicate and a magnesium salt.
• the "in situ” formation process generally gives a rough feel, causes dye reserves due to the lack of hydrophility, and causes deposits in bleaching or bleaching apparatus which can cause mechanical wear of bleached textile fibers.
• French patent 2,420,593 in the name of Kao Soap, which relates to bleaching compositions which do not alter the color of the treated textiles, proposes to add in particular to sodium percarbonate or to the ethane addition product -1,1,2,2 tetracarboxylate tetrasodium and H 2 0 2 , at least one organoacetic and organophosphonic compound.
• French patent 2,140,213 in the name of Monsanto relates to a stabilizing agent for reducing the decomposition of a peroxidized compound contained in an alkaline aqueous solution.
• This agent is formed by a combination of 1-hydroxyethylidene-1,1-diphosphonic acid, called HEDP, nitrilotriacetic acid, called NTA, and water-soluble salts and a water-soluble salt such as sulfate. magnesium.
• French patent 1,420,462 in the name of the applicant, relates to a process for stabilizing compounds peroxidized by magnesium silicate, during their use in the bleaching and bleaching of fibers and textile fabrics, according to which the silicate of magnesium is used preformed in the colloidal state.
• the magnesium silicate preformed in the colloidal state is used in combination with small amounts of dimagnesium salt of ethylenediaminetotetraacetic acid.
• stabilizing compositions based on colloidal magnesium silicate are proposed for peroxidized products, such as sodium perborate, sodium percarbonate, hydrogen peroxide, etc., intended for the stabilization of laundering baths prepared by means of detergents. household or bleaching baths in the textile industry.
• These compositions contain colloidal magnesium silicate associated with diethylenetriaminepentaacetic acid and with diethylenetriaminepentamethylenephosphonic acid.
• the organophosphonic sequestrant diethylenetriaminepentamethylenephosphonic acid (DTPMP) is in acid or water soluble salt form.
• the organoacetic sequestrant: diethylenetriaminepentaacetic acid is designated by (DTPA).
• the stabilizing composition according to the invention makes it possible to obtain a very substantial gain in the degree of polymerization, while the combination proposed in French patent 2,140,213 does not provide any improvement in the protection of the cellulose.
• compositions based on colloidal magnesium silicate were prepared with variable doses of DTPA and DTPMP.
• the doses of DTPA and DTPMP are given as a percentage by weight of pure product.
• Table 1 below indicates the proportions in percent of the different compositions produced.
• Composition No. 1 does not include DTPA or DTPMP: it is a control composition which serves as a reference for measuring the effectiveness of the other compositions.
• the detergent bath is maintained at 90 ° C for 1 hour; the quantity of active oxygen (OA) residual relative to the quantity of active oxygen initially contained in the bath is then measured.
• OA active oxygen
• the residual gain in OA provided by said compositions is defined as the difference in the stabilizing power of one of these said compositions minus the stabilizing power of the composition. witness # 1.
• Table 2 indicates the stabilizing power and the residual OA gain of the various stabilizing compositions.
• compositions no. 5, 6 and 8 have the same stabilizing power and the same gain in OA while the sum of the percentages of DTPA and DTPMP are respectively 10.7%, 11.4% and 23%.
• composition No. 6 The synergistic effect between the two sequestrants is particularly marked under composition No. 6; it is illustrated in Table 3.
• Table 3 shows that the sum of the results of compositions 2 and 4 corresponding to the hypothetical composition (2 + 4)? are significantly lower as stabilizing power and gain of OA, to the results of composition No. 6 which actually contains percentages of DTPA and DTPMP slightly lower than the percentages of DTPA and DTPMP of the hypothetical composition (2 + 4)?
• the synergy of DTPA and DTPMP at relatively low levels is particularly advantageous from an economic point of view because DTPMP is significantly more expensive than DTPA.
• composition No. 6 which contains only 4.4% of DTPMP has the same stabilizing power and the same gain in OA as composition No. 5, for example which contains 10.7% of DTPMP.
• the pieces tested are made of “EMPA 301” fabric: it is a reference fabric, made of cotton, used in the textile and bleaching industry; this fabric is supplied by the Federal Laboratory for Materials Testing of the Research Institute of St Gall in Switzerland.
• the degree of polymerization of the cellulose is determined according to the method described in standard AFNOR T 12005.
• the DP of the fabric “EMPA 301 was, at the start, before the washes, of 1850.
• Example 5 According to Example 5, Table 3 (6), from French patent 2,140,213, a 36.1% stabilizing solution of 1 mole of NTA, 0.47 mole of magnesium (from a soluble salt such as sulfate) is used. magnesium) and 0.3 moles of HEDP. Or a solution which contains by weight 29% of NTA at 90%, 15.8% of MgSO 4 ⁇ 7 H 2 O and 14.1% of HEDP at 60%.
• the stabilizing composition consists of 78% colloidal magnesium silicate, 14.5% DTPA in 40% solution (sodium salt) and 7.5% DTPMP in 50% solution.
• the degradation of the cellulose was evaluated by determining the degree of polymerization DP after a succession of 5 washes in the presence of each stabilizing composition.
• test 5 the sodium perborate is better stabilized than in the other tests.
• the amount of residual active oxygen is 45%, while it is only 5 and 10% in tests n ° 8 and 11.

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• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (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)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Anti-Oxidant Or Stabilizer Compositions (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Silicates, Zeolites, And Molecular Sieves (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Macromonomer-Based Addition Polymer (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)
• Golf Clubs (AREA)

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Applications Claiming Priority (2)

Publications (2)

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• 1980
  • 1980-11-04 FR FR8023524A patent/FR2493294A1/fr active Granted
• 1981
  • 1981-10-13 DE DE8181401577T patent/DE3162441D1/de not_active Expired
  • 1981-10-13 EP EP81401577A patent/EP0051509B1/fr not_active Expired
  • 1981-10-13 AT AT81401577T patent/ATE6431T1/de not_active IP Right Cessation
  • 1981-10-28 US US06/316,052 patent/US4384970A/en not_active Expired - Lifetime
  • 1981-10-29 GR GR66387A patent/GR75357B/el unknown
  • 1981-10-29 CA CA000388971A patent/CA1166406A/fr not_active Expired
  • 1981-11-03 NO NO813714A patent/NO154343C/no unknown
  • 1981-11-03 FI FI813452A patent/FI66820C/fi not_active IP Right Cessation
  • 1981-11-03 ES ES506799A patent/ES8307660A1/es not_active Expired
  • 1981-11-03 DK DK485481A patent/DK149338C/da not_active IP Right Cessation
  • 1981-11-04 JP JP56175869A patent/JPS57105499A/ja active Granted

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