SEDL / STP / STP1271-EB / STP16060S

Improvement of Initial Adhesion to Aluminum of Insulating Glass Polyurethane Sealants Using a Tertiary Amine Based Curing System

Hubin-Eschger, PJ
Technical Manager, Poly bd® Resins at Elf Atochem, Groupement de Recherches de Lacq, Artix,

Pages: 9    Published: Jan 1996

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Abstract

Hydroxylated polybutadiene based insulated glass sealants are well known to have a very low moisture vapor transmission rate and an excellent adhesion to glass and aluminum. Since the beginning of their industrial development, the best and most known and effective curing system for these sealants has been an organomercuric ester based catalyst.

The current and future pressure regarding ecological and toxicological issues will make this type of product increasingly difficult to use. This paper presents the results of work to develop other catalytic systems, which were obtained with the tertiary amine dimethylbenzylamine. The final improvement of initial adhesion to aluminum is obtained with the use of phenolic derivatives of coumarone indene.