Water compatible sterically hindered alkoxyamines and hydroxy substituted alkoxyamines
Sterically hindered hydroxy substituted alkoxyamine stabilizer compounds are made water compatible via certain backbones with affinity towards water. The sterically hindered amines are for example of formulae (5)-(7) These compounds are particularly effective in stabilizing aqueous polymer systems against the deleterious effects of oxidative, thermal and actinic radiation. The compounds are effective for example in stabilizing water borne coatings, aqueous inks, aqueous ink jet media and photocured aqueous systems.
1. A water compatible or water soluble sterically hindered hydroxy substituted alkoxyamine compound selected from the group consisting of compounds of formulae (5)-(7)
where
E is —O-T-(OH) b ,
T is a straight or branched chain alkylene of 1 to 18 carbon atoms, cycloalkylene of 5 to 18 carbon atoms, cycloalkenylene of 5 to 18 carbon atoms, a straight or branched chain alkylene of 1 to 4 carbon atoms substituted by phenyl or by phenyl substituted by one or two alkyl groups of 1 to 4 carbon atoms;
b is 1, 2 or 3 with the proviso that b cannot exceed the number of carbon atoms in T, and when b is 2 or 3, each hydroxyl group is attached to a different carbon atoms of T;
E′ is hydrogen, C 1 -C 18 alkyl, C 2 -C 18 alkenyl, C 7 -C 15 phenylalkyl, C 2 -C 18 alkanoyl or phenyl, alkoxy of 1 to 18 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms or aralkoxy of 7 to 15 carbon atoms, or E′ is independently defined as for E,
R is hydrogen or methyl,
R 5 is a divalent homo- or co-oligomer consisting of monomer units derived from monomers selected from the group consisting of ethylene oxide, propylene oxide, ethylene glycol, propylene glycol, acrylic acid, methacrylic acid, ethylene imine, acrylamide, vinyl formamide, vinyl alcohol and vinyl acetate; which homo- or co-oligomer consists of between 2 and about 24 monomer units.
2. A compound according to claim 1 wherein T is a straight or branched chain alkylene of 1 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, cycloalkenylene of 5 to 12 carbon atoms, or a straight or branched chain alkylene of 1 to 4 carbon atoms substituted by phenyl or by phenyl substituted by one or two alkyl groups of 1 to 4 carbon atoms.
3. A compound according to claim 1 where E is 2-hydroxycyclohexyloxy or 2-hydroxy-2-methylpropoxy.
4. A compound according to claim 1 of the formula
5. A compound according to claim 1 where R 5 is polyethylene glycol or polypropylene glycol.
6. A stabilized composition comprising
an organic material subject to the deleterious effects of light, heat and oxygen, and
an effective stabilizing amount of a water compatible or water soluble sterically hindered alkoxyamine or hydroxy substituted alkoxyamine compound according to claim 1 .
7. A composition according to claim 6 which is a coating, ink jet ink, ink jet recording material, photographic recording material, multi-layer polymer structure, a coextruded film, a radiation cured film, ink or coating; an adhesive or a laminate.
8. A composition according to claim 6 which additionally comprises an effective stabilizing amount of at least one coadditive stabilizer selected from the group consisting of the phenolic antioxidants, metal stearates, metal oxides, organophosphorus compounds, furanone antioxidants, hydroxylamines, ultraviolet light absorbers, and other hindered amine light stabilizers.
9. A composition according to claim 6 which additionally comprises an ultraviolet light absorber selected from the group consisting of the benzophenones, 2H-benzotriazoles and aryl-s-triazines.
10. A composition according to claim 6 which is a colored composition containing pigments or dyes.
11. A composition according to claim 6 which is a colored composition containing dyes.
12. A composition according to claim 6 which is a colored composition containing dyes, which composition is selected from the group consisting of ink jet inks, ink jet recording media, coatings, body care products, household products, textiles and fabrics.
13. A method for stabilizing ink-jet prints, which comprises applying to a recording material for ink-jet printing an ink composition containing a water soluble dye or a solution of a dye in an organic solvent and at least one compound of the formulae (5)-(7) as defined in claim 1 and drying said recording material.
14. A method for stabilizing ink-jet prints, which comprises applying to a recording material for ink-jet printing a casting or coating dispersion or an aqueous or organic solution containing at least one compound of the formulae (5)-(7) as defined in claim 1 and further applying either an ink composition containing a water soluble dye or a solution of a dye in an organic solvent; or an ink composition containing a water soluble dye or a solution of a dye in an organic solvent and at least one compound of the formulae (5)-(7) and drying said recording material.