THIXOTROPIC ANAEROBIC ADHESIVE

摘要

An anaerobic adhesive composition includes a monomer curable upon exclusion of oxygen. A peroxy polymerization initiator is present within the composition. The composition has a thixotrope imparting a thixotropic viscosity ratio in an uncured state of 8.2:1 to 11:1 as measured at rotation rates of 0.5 and 10 revolutions per minute. The thixotrope is composed of 3 to 50 total weight percent of inorganic particulate or 3 to 36 total weight percent of an organic compound. A process for forming an adhesive bond includes applying to a fastener an anaerobic adhesive composition that includes a polymerizable acrylate ester or vinyl ether, a peroxy polymerization initiator, and a thixotrope. The composition has a thixotropic viscosity ratio of between 8.2:1 and 11:1 for spindle rotation rates of 0.5 and 10.0 revolutions per minute. Tightening the fastener against a substrate induces viscosity breakdown and under the force to cure.