Study of Transition Metal Complexes as Curing Accelerators for Anaerobic Adhesives

摘要

Reported are the results of studying the influence of the composition of the complexes of transition metal salts with crown ethers on the kinetics of the curing of anaerobic adhesives developed in Kargin Research Institute of Polymer Chemistry and Technology.It is established that the use of copper salts makes it possible to substantially decrease the setting time on zinc-coated surfaces;however,in this case,the working life of adhesive decreases abruptly.It is shown that the activity of salts can be decreased by their complexation with various chelating agents.It is revealed that transition metal salts in the form of complexes with some crown ethers not only increase the rate of curing of anaerobic adhesives,but also considerably enhance the thermal stability of cured products that is explained by the ability of organic salts of metals to the inhibition of thermal-oxi-dative degradation of polymers.