Hydroxyphenylated hydantoins

Abstract

New hydroxyphenylated hydantoins are useful as stabilizers for synthetic organic polymeric materials. The new hydroxyphenylated hydantoins may be additionally substituted in the 1,3 and/or 5 positions of the hydantoin ring.The hydroxyphenylated and 5-substituted hydroxyphenylated hydantoins are generally prepared by reacting hydroxphenylated ketones or aldehydes with alkali cyanide and ammonium carbonate. Hydroxyphenylated hydantoins substituted in the 1 and/or 3 positions are generally prepared by reacting the 1 and/or 3-unsubstituted hydroxyphenylated hydantoins with the corresponding halogen or dialkylaminomethyl derivatives.

Description

Claims

1. A compound of the formula ##STR2## wherein R.sub.1 denotes alkyl with 1 to 8 carbon atoms, cycloalkyl with 6 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms; R.sub.2 denotes hydrogen, alkyl with 1 to 8 carbon atoms, cycloalkyl with 6 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms; R.sub.3 denotes hydrogen or methyl; X denotes a direct bond, alkylene with 1 to 18 carbon atoms, which can be interrupted by oxygen or sulphur atoms, or the radical --O--CH.sub.2 --, wherein the oxygen atoms is bonded to the phenol radical; R.sub.4 denotes hydrogen, alkyl with 1 to 17 carbon atoms, alkenyl with 2 to 17 carbon atoms, thiaalkyl with 3 to 21 carbon atoms, oxaalkyl with 3 to 21 carbon atoms, cyclohexyl, benzyl, phenyl, alkylphenyl with 7 to 14 carbon atoms, alkoxyphenyl with 7 to 24 carbon atoms, chlorophenyl, dichlorophenyl, naphthyl or a group ##STR3## or X and R.sub.4 conjointly with the carbon atom in the 5-position of the hydantoin ring denote one of the radicals ##STR4## R.sub.5 denotes hydrogen, alkyl with 1 to 18 carbon atoms, alkenyl with 3 to 18 carbon atoms, cyclohexyl, benzyl or hydroxybenzyl which is unsubstituted or substituted by 1 to 3 alkyl groups each with 1 to 4 carbon atoms; m denotes 2, and R.sub.6 denotes alkylene with 1 to 18 carbon atoms, oxaalkylene with 4 to 21 carbon atoms, wherein the carbon atom bonded to the nitrogen does not carry any further hetero-atoms, thiaalkylene with 4 to 21 carbon atoms, wherein the carbon atom bonded to nitrogen carries no further hetero-atoms, or one of the groups ##STR5## wherein q is 1 or 2 and n is 2 to 18, ##STR6##

2. A compound according to claim 1, wherein R.sub.1 denotes alkyl with 1 to 4 carbon atoms or cycloalkyl with 6 to 8 carbon atoms; R.sub.2 denotes hydrogen, alkyl with 1 to 4 carbon atoms or cycloalkyl with 6 to 8 carbon atoms; R.sub.3 denotes hydrogen; X denotes one of the radicals ##STR7## R.sub.4 denotes alkyl with 1 to 17 carbon atoms, cyclohexyl, benzyl, phenyl or a group ##STR8## R.sub.5 denotes hydrogen, alkyl with 1 to 18 carbon atoms or hydroxybenzyl substituted by 1 to 3 alkyl groups each having 1 to 4 carbon atoms; R.sub.6 denotes alkylene with 1 to 18 carbon atoms or the group --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 --.

3. A compound according to claim 1, of the formula ##STR9## wherein R.sub.1 and R.sub.2 independently of one another denote alkyl with 1 to 4 carbon atoms; R.sub.3 denotes hydrogen; X denotes a direct bond, ##STR10## R.sub.4 denotes alkyl with 1 to 17 carbon atoms or the group ##STR11## R.sub.5 denotes hydrogen or alkyl with 1 to 18 carbon atoms and p denotes 1 to 18.

4. A compound according to claim 1 which is 3,3'-methylene-bis-[5-(3",5"-di-tert-butyl-4"-hydroxyphenylethyl)-5-methylhydantoin].

5. A compound according to claim 1 which is 3,3'-hexamethylene-bis-[5-(3",5"-di-tert-butyl-4"-hydroxyphenylethyl)-5-methylhydantoin].

6. A compound according to claim 1 which is 3,3'-oxydiethylene-bis-[5-(3",5"-di-tert-butyl-4"-hydroxyphenylethyl)-5-methylhydantoin].