Sealants based on mercapto-terminated base polymer / epoxy compounds and curing methods with photolatent catalysts

摘要

The present invention is a sealant for coating a substrate, which is a mixture of a predominantly uncured matrix and a curing agent containing at least one epoxy compound, wherein the matrix is selected from the group consisting of polyethers, polythioethers, polythioether sulfides, Wherein the matrix, the curing agent, or both contain at least one photoinitiator based on a sterically hindered nitrogen-containing organic base, wherein the matrix, the curing agent, or both contain a mercapto-terminated base polymer based on a feed, a copolymer thereof and / And through the effect of energy-rich chemical radiation, at least one photoinitiator dissociates at least one radical per molecule based on the nitrogen-containing organic base, from which nitrogen from a pKa value of about 6 to 30 equivalents -Containing organic bases are formed and they act as active catalysts for curing of the matrix Will. The present invention also relates to a corresponding method of coating a substrate with a sealing compound.