Glycoluril derivatives and their use as stabilizers for polymers

Abstract From the Canadian patent

O.Z. 0050/37955 - 18 -, Abstract of the Disclosure: The novel compounds of the general formula I, (I), where, n is from 1 to 70 R1 and R2 independently of one another are each hydrogen, C1-C6-alkyl, C7-C12-aralkyl, aryl or a carboxylic ester group, or, R1 and R2 together may form a tetramethylene or pentamethylene group, R3, R4, R5 and R6 are each alkyl the radicals, X independently of one another are each a direct bond or a bridge member, Y and 2 are each oxygen sulfur or NR8, R7 is hydrogen, chlorine bromine, hydroxyl, alkoxy, carboxyl, a carboxylic ester group or unsubstituted or substituted carbamyl and R8 is hydrogen or unsubstituted or substituted alkyl, and the ammonium salts of …