Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1995-10-20
1997-06-03
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510340, 510339, 510427, 510351, 510502, C11D 137, C11D 1831
Patent
active
056354665
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Recent trends in the detergent industry have been towards delivering a more concentrated product to the consumer. This has the benefits of both smaller and lighter bottles, boxes etc. for the consumer to handle, as well as lowering the requirement for packaging materials. Decreasing the packaging materials in turn reduces the load on waste disposal into the environment.
With this in mind it has been the goal of detergents manufacturers to produce raw materials which have a higher concentration of active detergent ingredients. This goal challenges the manufacturers to formulate, and develop processes for, compositions which are increasingly concentrated, but still stable over a period of time.
This invention provides a stable concentrated aqueous or aqueous/alcohol solution of an alkyl ether sulphate useful as a component in formulating cleaning products especially dish washing liquids.
The solution contains alkaline earth metal ions, which are known to boost performance of dish washing formulations, but very few or no chloride or sulphate ions, which have a detrimental effect on the stability of concentrated solutions and on finished products made from said concentrated solutions.
The invention also describes a two-stage neutralising process for making such compositions.
The composition may be used as a finished product in its own right, but preferably it will be mixed with other ingredients to produce a finished product. It is intended that the sulphating
eutralising processes may be carried out at locations remote from the sites were the finished product is blended. This allows for .economical and flexible manufacturing and transportation.
The use of magnesium cations as performance boosters in dish washing liquids for at least part of the anionic surfactant has been widely disclosed in the prior art, for example, British patent numbers 1 524 441 and 1 551 074 and British published patent application 2 010 893.
U.S. Pat. No. 4,133,779, published on Jan. 9th, 1979, discloses a detergent composition comprising anionic and nonionic semipolar surfactants. It suggests that a concentrated liquid/paste containing from 45% to 95% active surfactant (which can be alkyl ether sulphate) can be made. Neutralisation by magnesium hydroxide is one of a number of options, but no process details are given, and no incentive to avoid chloride or sulphate ions is suggested. Indeed addition of magnesium in the form of magnesium sulphate is preferred. These compositions contain at least 1% of a semi polar nonionic surfactant.
EP 039110, published Nov. 4th, 1981, says that chloride and sulphate ions should be avoided or minimised because additional chloride or sulphate ions can increase the chill point temperature (the temperature at which inorganic salts precipitate as crystals in the finished product). EP 039110 deals with compositions of alkyl ether sulphate in combination with other surfactants, especially linear alkyl benzene sulphonate and alkyl sulphate in finished products. These finished products are not concentrated, and therefore the level of alkyl ether sulphate is around 10%. Neutralisation with mixed sodium/magnesium cations is disclosed.
EP 181212, published on May 14th, 1986, discloses that neutralisation of the alkyl ether sulphuric acid and the alkyl sulphuric acid can be carried out with the appropriate alkali or with a magnesium oxide or hydroxide slurry which avoids the addition of chloride or sulphate ions. This publication also describes detergent compositions comprising 22% to 65% by weight of a surfactant system composed of a mixture of anionic, nonionic, and zwitterionic surfactants in an organic solubiliser/hydrotrope-water medium. However this disclosure is limited to less than 24% by weight of alkyl ether sulphate.
U.S. Pat. No. 4,169,078, published on Sep. 25th, 1979 and EP 487170, published on May 27th, 1992, both deal with neutralisation processes for use with light duty liquid detergents. However, both of these disclosures are directed towards compositions comprisin
REFERENCES:
patent: 4129515 (1978-12-01), Foster
patent: 4133779 (1979-01-01), Hellyer et al.
patent: 4169078 (1979-09-01), Spicuzza, Jr. et al.
patent: 4435317 (1984-03-01), Gerritsen et al.
patent: 4549984 (1985-10-01), Satsuki et al.
patent: 4671894 (1987-06-01), Lamb et al.
patent: 4923635 (1990-05-01), Simion et al.
patent: 5096622 (1992-03-01), Simion et al.
patent: 5382386 (1995-01-01), Jakubicki et al.
Burdon Allan
Cope Katherine J.
Coppenrath Wendy
Stasino Guy
Talkes Brian E.
Allen George W.
Lieberman Paul
Ogden Necholus
The Procter & Gamble & Company
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