Method for impregnating a lining material with a hardenable resi

Coating processes – Restoring or repairing

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Details

156 94, 156287, 264 36, 427230, 427238, B32B 3500

Patent

active

053487648

ABSTRACT:
An improved method for impregnating a tubular lining material with a hardenable liquid resin employed in a pipe repair operation by lining the pipe internally with the lining material; the method comprises (a) supplying about the same amounts of the same hardenable liquid resin to two mixing baths, (b) mixing the hardenable liquid resin with an agent to retard hardening and another agent selected from catalyst to facilitate hardening and hardener in one of the mixing baths, and, at the same time, mixing the hardenable liquid resin with a hardening accelerator in another one of the mixing baths, (c) supplying predetermined amounts of these mixtures to a static mixer from the respective mixing baths, (d) mixing these mixtures together in the static mixer to obtain a final mixture of hardenable resin, (e) supplying the final mixture to the tubular lining material, and (f) impregnating the tubular lining material with the final mixture.

REFERENCES:
patent: 4602974 (1986-07-01), Wood et al.
patent: 4622196 (1986-11-01), Wood
patent: 4680066 (1987-07-01), Wood
patent: 4762585 (1988-08-01), Schneider et al.
patent: 4786345 (1988-11-01), Wood
patent: 4883550 (1989-11-01), Overath et al.

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