Method for improving hydrolytic stability of the bond between st

Details Method for improving hydrolytic stability of the bond between st Method for improving hydrolytic stability of the bond between st

1975-08-28

1976-12-07

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 615Z, 148 315, 428382, 428383, 427409, 152357R, C23F 710

Patent

active

039960749

ABSTRACT:
A method is disclosed for improving the hydrolytic stability of the adhesive bond between an RFL type organic adhesive and the steel reinforcing element in steel-rubber composite articles. This is accomplished by a pre-treatment of the steel surface before it is coated with the organic adhesive. The pre-treatment is conducted in a continuous operation which includes the sequential steps of: (1) cleaning the metal surface by a vapor degreasing method or by immersion in a detergent containing aqueous bath followed by a hot water rinse; (2) coating the surface with a crystalline or microcrystalline zinc phosphate; (3) rinsing the phosphated steel surface with water; (4) subjecting the phosphated surface to a chromate or chromic acid rinse; (5) rinsing again with deionized water; and finally (6) drying the steel reinforcing element.

REFERENCES:
patent: 2774701 (1956-12-01), Koryta
patent: 3817778 (1974-06-01), Wright
patent: 3857726 (1974-12-01), Van Gils
Cox, Rubber Journal, 4-69, pp. 49-57.

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