Sealing mass based on mercapto-terminated base polymer/epoxy compound and method for hardening by means of a photolatent catalyst

US10717107B2 · kind B2 · utility

Assignee

• CHEMETALL GMBH · DE

Inventors

• Peter Bons · Reichelsheim, DE
• Swetlana Reichert · Frankfurt am Main, DE
• Bjoern Sievers · Frankfurt, DE
• Miroslav Kralev · Frankfurt am Main, DE

Key dates

• Filing date: Feb 12, 2016
• Grant date: Jul 21, 2020
• Expiry date: May 9, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B37/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a sealing compound for coating a substrate, which is a mixture of a predominantly uncured base mass and a curing agent containing at least one epoxy composition, wherein the base mass contains a mercapto-terminated base polymer based on polyether, polythioether, polythioethersulfide, polysulfide, copolymers thereof and/or mixtures thereof, wherein the base mass, the curing agent or both contain at least one photoinitiator based on a sterically hindered nitrogen-containing organic base, and, through the effects of high-energy actinic radiation, the at least one photoinitiator dissociates at least one radical per molecule based on a nitrogen-containing organic base, from which a nitrogen-containing organic base having a pKa value of the conjugated acid in the region of 6 to 30 is formed, which acts as an active catalyst for the curing of the base mass. The present invention also relates to a corresponding method for coating a substrate with a sealing compound.