Abstract: New betaketosulfonic derivatives, the process for their preparation, the photopolymerizable systems containing the same and their application as polymerization photoinitiators for inks, and particularly for inks having high content of pigments are described.

Abstract: Derivatives of 4-hydroxy-methyl-piperidine having general formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be alkyl or may form, with the carbon they are bound to, a cycloalkyl group or the group ##STR2## with R.sub.6, R.sub.7, R.sub.8 and R.sub.9 being hydrogen or alkyl; R.sub.5 may be H, alkyl, aryl, alkenyl, etc.; Y may be an organic or inorganic group or atom having a valence from 1 to 4 and n is an integer from 1 to 4.The use of the derivatives of the alkyl-substituted 4-hydroxy-methyl-piperidine of formula (I) as stabilizers of polymeric substances, and polymeric compositions stabilized with said piperdine derivatives.This invention relates to new derivatives of alkyl-substituted 4-hydroxy-methyl-piperidine, to the use thereof as stabilizers of polymeric substances usually subject to worsening owing to thermal and/or photo-oxidation, and to the polymeric compositions stabilized with said derivatives.

Abstract: Derivatives of morpholine containing substituted piperidine groups having the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, the same or different, are each a lower alkyl group, or R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4, together with a carbon atom to which they are bound, represent a cycloalkyl group or a group of the formula: ##STR2## in which R.sub.6, R.sub.7, R.sub.8 and R.sub.9, the same or different, represent a hydrogen atom or a lower alkyl group, and R.sub.5 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkoxyalkyl group, an aralkyl group, a substituted aralkyl group carrying one or more substituents on the aryl radical, a 2,3-epoxypropyl group, a group of formula --CH.sub.2 --COOR.sub.10 in which R.sub.10 is an alkyl group, an alkenyl group, a phenyl group, an aralkyl group or a cyclohexyl group; a group of formula: ##STR3## in which R.sub.11 is a hydrogen atom, a methyl group, an ethyl group or a phenyl group, and R.sub.

Abstract: Alkyl-substituted 4-methyl-piperidine derivatives having formula: ##STR1## wherein X is selected from the radicals: --N R.sub.12 R.sub.13 ; ##STR2## and --O--R.sub.17 Use of the alkyl-substituted 4-methyl-piperidine derivatives of general formula (I) as stabilizers of polymeric substances and polymeric compositions stabilized with said piperidine derivatives.

Abstract: There are disclosed new polymers of piperidine having the general formula: ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, each independently of the others, are an alkyl radical having 1 to 4 C, or R.sub.1 and R.sub.2, and/or R.sub.3 and R.sub.4 form a cycloalkylene radical having 3 to 12 C, R.sub.5 is hydrogen, an alkyl, hydroxyalkyl or alkyl-oxy radical having 1 to 6 C, or an aryl or an aryl-alkyl radical having 6 to 18 C, an alkenyl radical having 2 to 6 C or a --(CH.sub.2).sub.X --CO.sub.2 --R.sub.7 radical in which X is a number from 0 to 12, and R.sub.7 =H, a metal, an alkyl, alkylene, alkenyl, alkenylene radical containing 1 to 20 C; R.sub.6 =H or an alkyl having 1 to 4 C and n is an integer from 2 to 100.Use of the piperidine polymers having general formula (I) as stabilizers of polymeric substances, and polymeric compositions stabilized with said piperidine derivatives are also disclosed.

Abstract: There are disclosed new 4-spiro-oxirane derivatives of substituted piperidine having the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, either like or unlike one another, are each an alkyl radical having 1 to 4 C, or R.sub.1 and R.sub.2, and/or R.sub.3 and R.sub.4 together form a cyclo-alkylene radical having 3 to 13 C; R.sub.5 may be hydrogen, an alkyl, oxyalkyl or alkoxy radical having 1 to 6 C, an aryl or aryl-alkyl radical having 6 to 18 C, an alkenyl radical having 2 to 6 or a --(CH.sub.2).sub.X CO.sub.2 R.sub.7 radical in which X is an integer from 0 to 12, R.sub.7 =H, metal, an alkyl, alkylene, alkenyl, alkenylene radical having 1 to 20 C and R.sub.6 is hydrogen or an alkyl radical containing 1 to 4 C.

Abstract: New N,N'-di-(hydroxy-phenyl) derivatives of piperazine are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the polymeric compositions stabilized with said new compounds.

Abstract: New N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyole fins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.

Abstract: New polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids are disclosed.The new polyesters are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new polyesters is also disclosed, as well as the polymeric compositions stabilized with said new polyesters.

Abstract: New N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in partcular polyole fins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.

Abstract: New derivatives of N,N'-4-piperidyl-tetraalkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.

Abstract: New derivatives of N,N'-4-piperidyl-tetralkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.