Lord Corp. officials were busy at the recent ACS Rubber Division fall technical meeting and expo in Cincinnati, introducing two products, making three technical presentations and putting on a two-day seminar on rubber bonding.
One presentation covered failure analysis techniques for rubber-to-substrate bonding; a second outlined new NBR/HNBR adhesives for oil and gas drilling applications; and the final one compared the carbon footprint of aqueous and solvent adhesive systems.
Both of the new products were aqueous adhesives, Chemlok 8116 for silicone and FKM elastomers, and Chemlok 8600 for urethane elastomers.
Chemlok 8116 is designed for bonding peroxide-cured elastomers such as silicone rubber, EPDM, FKM, NBR and HNBR to zinc phosphatized steel and other rigid substrates.
It is a one-coat, water-based adhesive that operates under harsh conditions and has good resistance to hot oils, water and other engine fluids, according to Karen Sy-Laughner, Lord industrial marketing manager for the Americas. It can be used in such products as gaskets, seals and NVH components.
Like 8116, Chemlok 8600 requires just one coat for most applications. Lord said it accommodates a wide range of processing conditions, including extended prebake. It is designed to bond urethane elastomers to metal but also will bond a wide variety of polyether- and polyester-based urethanes of varying hardness to all types of metal.