Patent ID: 6664357
Filing Date: 2003-12-16
Classification: C08F,C08G,C09D,C09J

Abstract:
A novel process for preparing a storage stable anaerobic//ultraviolet/visible light dual cure adhesive composition comprising the steps of:a) forming a homogeneous mixture comprising one or more polymerizable (meth)acrylate ester monomers, one or more oligomeric polymerizable (meth)acrylate monomers, optionally (meth)acrylic acid, optionally plasticizers or thickening agents or both, one or more chelating agents and at least an effective amount of an accelerator, an organic cyclic sulfimide and heating this mixture at an elevated temperature of 20C to 100C for a time sufficient to achieve acceptable chelation; b) Adding a tertiary amine accelerator and continuing to heat the mixture at a temperature in the range of about 20C to about 100C for a time sufficient to provide the composition with the desired anaerobic curing properties and stability on heat aging; c) adding one or more photoinitiators and optionally one or more of the group consisting of oxidants, dyes or fluorescent agents at room temperature.