Acrylic adhesive sealant and leak sealing method

Details Acrylic adhesive sealant and leak sealing method Acrylic adhesive sealant and leak sealing method

1982-05-03

1988-09-20

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 343, 277 72FM, 206219, F16J 1514

Patent

active

047720310

ABSTRACT:
A sealant system for repairing leaking pipes comprised of an elastomeric modified acrylic adhesive, exothermically curable upon activation by a catalyst, and a blowing agent. After mixing the components, the sealant is pumped into a mold cavity located over the leak. The mold is sealed and the reaction of the acrylic proceeds to completion concomitant with a rise in temperature, decomposition of the blowing agent and an increased pressure within the mold. The internal pressure thus generated forces the sealant into the interstices of the pipe. The sealant upon complete curing and solidification is bonded to the surface of the pipe.

REFERENCES:
patent: 2815966 (1957-12-01), House
patent: 3222076 (1965-12-01), Hollingsworth
patent: 3367890 (1968-02-01), McManbale
patent: 3620990 (1971-11-01), Hazen et al.
patent: 3655213 (1972-04-01), Forsgren
patent: 3684136 (1972-08-01), Baumann
patent: 4192924 (1980-03-01), Crivello
patent: 4277568 (1981-07-01), Dawson et al.
patent: 4358417 (1982-11-01), Beinhauer

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