Patent ID: 8865794
Filing Date: 2014-10-21
Classification: B32B,C08K,C09J

Abstract:
1. A composition for bonding two substrates to teach other without use of primers, consisting of: an anaerobically-curable component; an activator comprising a free radical peroxide initiator capable of initiating radical polymerization of the anaerobically-curable component; and microencapsulated ferrocenes and/or ferrocene derivatives, wherein the ferrocenes and/or ferrocene derivatives are encapsulated in liquid form within a formaldehyde polymer system, in an amount sufficient to enhance anaerobic polymerization of the anaerobically curable component on the at least two substrates when pressure causes the microcapsules to rupture and release metal ions form the capsules to activate anaerobic polymerization that bonds the substrates; wherein the metal ions are present in an amount of about 0.1% to about 7% by weight of the composition; wherein said composition bonds the substrates, at least one substrate being selected from stainless steel, zinc, zinc dichromate, cadmium and plastic, and provides enhanced cure speed and bond strength, and optionally further comprising at least one of a reducing agent, an accelerator, a stabilizer, an oxidation inhibitor, a chelating agent, a friction reducer, and a thickening agent.