Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With oxygen or halogen containing chemical bleach or oxidant...
Patent
1997-02-05
1998-11-24
Shah, Mukund J.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With oxygen or halogen containing chemical bleach or oxidant...
562 2, C07C40040, C07C27122, C11D 339
Patent
active
058406670
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT 16895/01847 filed Aug. 3, 1995.
The present invention relates to activators for use in conjunction with peroxygen bleaches to improve low temperature bleaching, in particular laundry detergent compositions, textile bleaches, hard surface cleaners, pulp bleaching and other bleaching environments. The activator compounds contain carbamate groups.
In EP-A-0,170,386, peroxy acid bleaching compounds include in the peracid molecule an amide group. The peracids may be generated in situ by the reaction between an activator, that is a compound in which the perhydroxyl group of the percarboxylic acid is replaced by a leaving group, and a peroxygen source, such as an inorganic persalt. The activator and persalt may be incorporated into the same detergent composition together with other components. Alternatively, stable magnesium salts of the percarboxylic acid may be incorporated into a detergent.
In EP-A-0,458,327, ureido peroxy carboxylic acids are described. In EP-A-0485928, the ureido percarboxylic acids are synthesised from carbamoyl lactams by cleavage of the N--C bonds of the lactam ring. The cleavage reaction is carried out in concentrated sulphuric acid or methane sulphonic acid, followed by addition of concentrated aqueous hydrogen peroxide.
Other nitrogen containing bleach activator compounds include phthalimide derivatives, for instance N-alkyl derivatives in which the alkyl group includes a percarboxylic group. Such compounds are described in EP-A-0,325,289 and EP-A-0,325,288, as well as EP-A-0,166,041. Other nitrogen containing derivatives include isatoic anhydride derivatives such as disclosed in EP-A-0,332,050. Other cyclic nitrogen containing activators are the 2-substituted benzoxazine-4-ones such as described in EP-A-0,332,294.
Compounds falling within the scope of formula I herein are known compounds. For instance in U.S. Pat. No. 4617417, compounds of the formula I in which R.sup.2 is H and A is O and in which the group at the position represented by L is alkoxy are described as intermediates for making diones which are known as cardiotonic agents. In EP-A-0561758, similar compounds are described as intermediates which are saponified and subsequently have the alkoxy carbonyl protecting group removed to form chiral .beta.-amino acids. In GB-A-0959204, similar compounds are intermediates in the synthesis of herbicides which are carbamic esters in which the group represented by L in formula I is an alkyl amino group. In GB-A-1472154, similar compounds are hydrogenated and subsequently have a benzyloxycarbonyl protecting group for the amine functionality removed, in the synthesis of pyroglutamyl compounds which have anti-depressive activity. In U.S. Pat. No. 2855436, similar compounds in which R.sup.1 is 1,2-phenylene are cyclised to form a condensed ring system including an isatoic anhydride structure, which are subsequently used as synthetic intermediates for making insecticides. In EP-A-0144290, .OMEGA.-amino carboxylic acids are first of all treated to protect the amine group using benzyloxycarbonyl group and subsequently esterified and used as an intermediate in the formulation of a polypeptide having anti-hypertensive properties.
Compounds of the formula I as herein defined in which the group represented by L is an alkoxy group, and which X is either O or S and A is O or S themselves have herbicidal properties. Such properties are also described in GB-A-1465451. In GB-A-2231871, such compounds are said to be useful in the thickening or solidification of oily liquids, for example in cosmetics, pharmacy and paint industry. In U.S. Pat. No. 3078301, such compounds are used as plasticisers for polyvinyl resins.
There is still a need for improved bleach activator compounds which give good bleaching at low temperatures, but which have minimal dye damage and fabric damage properties and bleach a wide range of stains.
A new composition according to the present invention, which is of particular use as a bleach composition, comprises a peroxygen bleach precursor and a com
REFERENCES:
patent: 2855436 (1958-10-01), Rekker
patent: 3078301 (1963-02-01), Taub
patent: 4617417 (1986-10-01), Conley et al.
patent: 4634551 (1987-01-01), Burns et al.
Milne Neal James
Watkins Jonathan Mercer
Rao Deepak R.
Shah Mukund J.
Warwick International Group, Ltd.
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