Mixed peroxygen activator compositions
Reference Number: N 03-02A
Inventors: Alvarez, Vincent E.; Deline, James E.; Foland, Lafayette D.; Kaaret, Thomas W.; Petrin, Michael J.; Smith, William L.; Sudbury, Barry A.; Zielske, Alfred G.
In one aspect of the present invention, nitrites are provided in substantially solid form having the structure of Formula I ##STR3## wherein A is a saturated ring formed by five atoms in addition to the N.sub.1 atom, the five saturated ring atoms being four carbon atoms and a heteroatom, the substituent R.sub.1 bound to the N.sub.1 atom of the Formula I structure including either (a) a C.sub.1-24 alkyl or alkoxylated alkyl where the alkoxy is C.sub.2-4, (b) a C.sub.4-24 cycloalkyl, (c) a C.sub.7-24 alkaryl, (d) a repeating or nonrepeating alkoxy or alkoxylated alcohol, where the alkoxy unit is C.sub.2-4, or (e) --CR.sub.2 R.sub.3 C.tbd.N where R.sub.2 and R.sub.3 are each H, a C.sub.1-24 alkyl, cycloalkyl, or alkaryl, or a repeating or nonrepeating alkoxyl or alkoxylated alcohol where the alkoxy unit is C.sub.2-4.
The Formula I compounds have a quaternary nitrogen atom (N.sub.1), requiring the presence of at least one counterion (Y) to be associated therewith, which is illustrated in Formula I as "Y.sup..theta.," but as understood can be monovalent, or multivalent. Y includes counterions, or organic and inorganic anions, such as chloride, bromide, nitrate, alkyl sulfate, bisulfate, sulfate, tosylate, and mesylate. Especially preferred are methyl sulfate, sulfate, bisulfate, tosylate, and mixtures thereof. Z will be in the range of 0 to 10. These compounds, or salts, are particularly well suited to granule bleaching and cleaning compositions.
The nitriles with the Formula I structure are particularly useful when formulated as compositions that include a source of active oxygen, and these compositions provide excellent bleaching in alkaline solutions.
Preferred embodiments include lower alkyls substituted at the N.sub.1, e.g. N-methyl morpholinium acetonitrile, N-ethyl morpholinium acetonitrile, N-butyl morpholinium acetonitrile, which are illustrated by Formula II (with "n" preferably being 0 to 24 and where "Y" is one of the above described counterions). ##STR4##
A particularly preferred embodiment is an N-methyl morpholinium acetonitrile salt where "n" of Formula II is 0. A composition useful for bleaching comprises a heterocyclic cationic species either capable of forming a peroxyimidic acid with a source of active oxygen in aqueous solution, or already being in a peroxyimidic form, and an anionic species either capable of forming a peracid with a source of active oxygen in aqueous solution, or being already in a peracid form, or a non-anionic polarizable activator and suitable counterion. These compositions can be liquid, solid, or formulated for dual dispensing. A particularly preferred embodiment is the use of preformed ion-pairs with selected cationic heterocyclic quaternary (e.g. nitrile) activators and anionic activators in which the activators act as co-counterions.
Compositions including these nitriles are useful, for example, in laundry products, such as bleaching additives, detergents, detergent boosters, detergents with bleach, bleaches, bleaching aids, stain removers, and spot treatment products such as stain removers, prewash and presoak laundry aids. Among the advantages derived from such compositions are improved cleaning, stain removal, spot removal, whitening, and brightening of treated articles.