Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...
Patent
1992-09-23
1993-10-26
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Coating or impregnating workpiece before molding or shaping...
264265, 26433119, 427302, 427322, 427400, 428420, 4284244, B32B 3112
Patent
active
052563553
ABSTRACT:
A room temperature curing polyurethane composition is bonded to the surface f cables having jackets of an olefin/ester interpolymer to provide a water resistant seal thereabout by first exposing the surface of a length of cable to an alkali metal hydroxide solution to hydrolyze the functional ester groups and thereby substitute hydroxyl groups for the organic acid of the ester in the interpolymer at the surface of the jacket. A diisocyanate primer is applied to the treated surface and it interacts with the hydroxyl groups to produce pendant reactive groups. A room temperature curing urethane prepolymer composition is then molded about the primed surface at ambient temperatures and the unreacted hydroxyl groups along the urethane prepolymer chain react with the pendant reactive groups of the jacket to produce a firmly bonded overmolding on the jacket.
REFERENCES:
patent: 3616191 (1971-10-01), Fuerholzer et al.
patent: 3639567 (1972-02-01), Harvig
patent: 3971884 (1976-07-01), Meeks et al.
patent: 4018948 (1977-04-01), Saracsan et al.
patent: 4181761 (1980-01-01), Ishimoto et al.
patent: 4416749 (1983-11-01), Mahr et al.
Davis Robert B.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
The United States of America as represented by the Secretary of
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