Process for bonding elastomeric materials to metals
Abstract
Abstract A PROCESS FOR BONDING AN ELASTOMERIC MATERIAL TO A METAL SURFACE WHEREIN THE METAL SURFACE IS TREATED WITH A MIXTURE OF CHROMIC ACID AND PHOSPHORIC ACID, THE ELASTOMERIC MATERIAL IS PLACED IN CONTACT WITH THE THUS-TREATED SURFACE AND A MODERATE PRESSURE IS APPLIED TO EFFECT THE BONDING. THE CHROMIC-PHOSPHORIC ACID SOLUTION USED MAY ALSO CONTAIN AN INERT FILLER, SUCH AS TITANIUM DIOXIDE AND DESIRABLY CONTAINS THE CROMIC AND PHOSPHORIC ACID IN EQUAL CONCENTRATIONS. THE ACID SOLUTION IS APPLIED SO AS TO LEAVE FROM ABOUT 20 TO 300 MILLIGRAMS PR SQUARE FOOT OF DRY COATING ON THE METAL SURFACE, ALTHOUGH THE COATING IS NOT PERMITTED TO DRY COMPLETELY BEFORE THE APPLICATION OF THE ELASTOMERIC MATERIAL. NUMEROUS NATURAL AND SYNTHETIC RUBBERS CAN THUS BE BONDED TO SURFACES OF STEEL, ALUMINUM, OR ZINC BY THIS METHOD.
Inventors
- 👤 Donald H Campbell
Bibliographic Details
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