Abstract: Compounds of formula (I): [in which: R1 represents a direct bond, an oxygen atom, a group >CH2, a sulphur atom, a group >C?O, a group —(CH2)2— or a group of formula —N—Ra, where Ra is hydrogen or an alkyl; R4, R5, R6 and R7 are each hydrogen or various groups or atoms; R8, R9, R10 and R11 are each hydrogen, hydroxy, or alkyl; or R9 and R11 form a fused ring system with the benzene rings to which they are attached; R12 is a direct bond, oxygen atom or methylene; and X? is an anion; and esters thereof] are useful as cationic photoinitiators, especially for use in surface coating applications, such as printing inks and varnishes, and which are intended to be cured by polymerisation initiated by radiation.

Abstract: A method of preparing a polymeric aryl sulfonamide is described which consists of reacting aryl sulfonyl with a polymeric amine in the presence of an acid acceptor. Also, another method of preparing a polymeric aryl sulfonamide is disclosed and consists of: reacting an aryl sulfonyl with a polymeric diamine in the presence of an acid acceptor to result in a linear oligomeric molecule; and reacting the linear oligomeric molecule with a monoamine or an aryl monosulfonyl in the presence of an acid acceptor. The use of polymeric aryl sulfonamides as pigment dipersants and wetting agents is also disclosed.

Abstract: Compounds of formula (I): [in which: R1 represents a direct bond, an oxygen atom, a group >CH2, a sulphur atom, a group >C?O, a group —(CH2)2— or a group of formula —N—Ra, where Ra is hydrogen or an alkyl; R4, R5, R6 and R7 are each hydrogen or various groups or atoms; R8, R9, R10 and R11 are each hydrogen, hydroxy, or alkyl; or R9 and R11 form a fused ring system with the benzene rings to which they are attached; R12 is a direct bond, oxygen atom or methylene; and X is an anion; and esters thereof] are useful as cationic photoinitiators, especially for use in surface coating applications, such as printing inks and varnishes, and which are intended to be cured by polymerisation initiated by radiation.

Abstract: A method of preparing a polymeric aryl sulfonamide is described which consists of reacting aryl sulfonyl with a polymeric amine in the presence of an acid acceptor. Also, another method of preparing a polymeric aryl sulfonamide is disclosed and consists of: reacting an aryl sulfonyl with a polymeric diamine in the presence of an acid acceptor to result in a linear oligomeric molecule; and reacting the linear oligomeric molecule with a monoamine or an aryl monosulfonyl in the presence of an acid acceptor. The use of polymeric aryl sulfonamides as pigment dipersants and wetting agents is also disclosed.