Hydrolytically stable ortho-alkylated phenyl phosphonites and stabilized compositions
AssigneeCiba-Geigy Corporation
InventorJohn D. Spivack
Life of this patent
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Abstract
Hydrolytically stable, ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 and R.sup.2 are alkyl or phenylalkyl, R.sup.3 is hydrogen, alkyl or carboalkoxyalkyl, R.sup.4 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.5 is halogen, --XH or XR.sup.6 where X is O or S and R.sup.6 is phenyl substituted by alkyl, phenylalkyl or carboalkoxyalkyl, are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.
Claims20
A compound of the formula ##STR16## wherein R.sup.1 is branched alkyl of 3 to 8 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl,
- R.sup.2 is alkyl of 1 to 18 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl.
- R.sup.3 is hydrogen, alkyl of 1 to 18 carbon atoms, carboalkoxy of 2 to 19 carbon atoms, carboalkoxyalkyl of 3 to 24 carbon atoms, carbophenoxy, carbophenoxyalkyl of 8 to 16 carbon atoms;
- or said carbophenoxy or said carbophenoxyalkyl with the phenoxy substituted with 1 to 3 alkyl groups with 1 to 8 carbon atoms in each alkyl group,
- R.sup.4 is alkyl of 1 to 18 carbon atoms, phenyl or phenyl substituted by 1 to 3 alkyl groups with 1 to 8 carbon atoms in each alkyl group,
- R.sup.5 is halogen, --XH or --XR.sup.6,
- X is O or S,
- R.sup.6 is phenyl, substituted by alkyl, having the formula ##STR17## R.sup.7 is hydrogen, branched alkyl of 3 to 18 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl,
- R.sup.8 is hydrogen, alkyl of 1 to 18 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl, and
- R.sup.9 is hydrogen, alkyl of 1 to 18 carbon atoms, carboalkoxy of 2 to 19 carbon atoms, carboalkoxyalkyl of 3 to 24 carbon atoms, carbophenoxy, carbophenoxyalkyl of 8 to 16 carbon atoms;
- or said carbophenoxy or said carbophenoxyalkyl with the phenoxy substituted with 1 to 3 alkyl groups with 1 to 8 carbon atoms in each alkyl group.
A compound of the formula ##STR21## wherein R.sup.4 is alkyl of 1 to 18 carbon atoms, phenyl or phenyl substituted by 1 to 3 alkyl groups with 1 to 8 carbon atoms in each alkyl group,
- X is O or S,
- R.sup.7 is hydrogen, branched alkyl of 3 to 18 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl,
- R.sup.8 is hydrogen, alkyl of 1 to 18 carbon atoms, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl, and
- R.sup.9 is hydrogen, alkyl of 1 to 18 carbon atoms, carboalkoxy of 2 to 19 carbon atoms, carboalkoxyalkyl of 3 to 24 carbon atoms, carbophenoxy, carbophenoxyalkyl of 8 to 16 carbon atoms;
- or carbophenoxy or carbophenoxyalkyl with the phenoxy substituted with 1 to 3 alkyl groups with 1 to 18 carbon atoms in each alkyl group,
- with the proviso that all of R.sup.7, R.sup.8 and R.sup.9 cannot be hydrogen at the same time.
Dependencies are inferred from the claim text.