Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1989-09-14
1990-10-30
Willis, Prince E.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
252 95, 252 99, 2521864, 25218641, C11D 328, C11D 339
Patent
active
049667238
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to the use of bleach activators, especially in detergent compositions.
Compounds such as tetraacetyl ethylene diamine (hereafter referred to as "TAED") are well known. Processes for the production of such compounds are disclosed for instance in published German patent application No. 2832021. These compounds are said to be efficient in activating the conventional inorganic salts used as bleach precursors in detergent compositions and generate peracetic acid in situ by the reaction thereof with alkaline hydrogen peroxide. The activating agent for the bleach precursor is the so-called bleach activator. Specific examples of such bleach precursors are sodium perborate and sodium percarbonate. In the absence of the activators the bleach precursor is satisfactorily effective only at elevated temperatures, its effectiveness being very slow at lower temperatures. The use of compounds such as TAED enable the bleach precursor to function more effectively at temperatures of the order of 60.degree. C.
It has now been found that certain cyclic nitrogen compounds function efficiently as additives in activating the bleach precursor in detergent compositions, especially at low temperatures.
Accordingly the present invention is a detergent composition in aqueous solution comprising:
(i) a surfactant selected from anionic, nonionic, zwitterionic and cationic surfactants and mixtures thereof,
(ii) a precursor compound capable of giving rise to a peroxygen compound in the presence of water,
(iii) a bleach activator capable of enhancing the bleaching activity of the peroxygen compound so formed,
(iv) a suds suppressing agent and
(v) a detergent builder, characterised in that the bleach activator comprises one or more cyclic tertiary nitrogen compounds of the generic formula ##STR1## wherein Q is an organic divalent grouping such that Q and N together with the carbonyl and oxygen functions in the compound form one or more cyclic structures, and R is H, an alkyl, alkaryl, aryl, aralkyl, alkoxyl, haloalkyl, amino, amino alkyl, carboxylic or a carbonyl-containing function, said activator being at least partially soluble in water.
Where R has an aryl, alkaryl or aralkyl containing function, it is essential that such functions also carry a substituent capable of solubilising the activator in aqueous systems e.g. a sulphonic acid group. Where R is a halogen containing function the halogen is preferably chlorine or bromine
Examples of such compounds include: ##STR2## wherein R has the same significance as in formula (I) above. A specific example of such a compound (R.dbd.CH.sub.3) is 2-methyl-(4H)3,1-benzoxazin-4-one.
Other compounds of this type include those in which R.dbd. an alkylamino group e.g. dimethylamino group; an acyl group e.g. a CH.sub.3.CO group; an alkoxyl group e.g. ethoxyl group; a haloalkyl group e.g. a chloro-methyl, a dichloromethyl or a trichloromethyl group; an alkoxyalkylene ether group, e.g. a methoxy methylene ether group; or, an alkylene carboxylate group e.g. a --(CH.sub.2).sub.2 COO-- group.
Another compound of this type is shown in formula (III) below: ##STR3## wherein R has the same significance as in formula (I) above, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different nuclear substituents and may be selected from H, halogen, alkyl, alkenyl, aryl, hydroxyl, alkoxyl, amino, alkyl amino, COOR.sub.5 (where R.sub.5 is an H or an alkyl group), and carbonyl functions. Specific examples of compounds of this type include those in which: (a) R.sub.1 and R.sub.4 are both H, and R.sub.3 .dbd.H and R.sub.2 .dbd.OH; R.sub.2 .dbd.acetoxy and R.sub.3 .dbd.H; R.sub.2 .dbd.R.sub.3 .dbd.alkoxy, especially methoxy; R.sub.2 .dbd.H but R.sub.3 .dbd. a halogen or a haloalkyl e.g. chlorine group or a chloromethylene group; R.sub.2 .dbd.halogen or haloalkyl group and R.sub.3 .dbd.H; and (b) either R.sub.1, R.sub.2 or R.sub.4 .dbd.alkyl e.g. methyl but the others are all H.
A further compound of this type is shown in formula (IV) below: ##STR4## where R has the same significance
REFERENCES:
patent: 3775333 (1973-11-01), Loffelman et al.
patent: 3840466 (1974-10-01), Gray
patent: 3850920 (1974-11-01), Walles
patent: 3928223 (1975-12-01), Murray
patent: 4147654 (1979-04-01), Rapko
patent: 4271031 (1981-06-01), Oppenlaender et al.
patent: 4551263 (1985-11-01), Schellhammer et al.
Hodge Stephen R.
Pearce Andrew
BP Chemicals Limited
Willis Prince E.
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