Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1993-09-13
1995-03-14
Friedman, Carl D.
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
405264, E04G 2100
Patent
active
053967496
ABSTRACT:
There is disclosed a method of cutting off water flow by grouting characterized by injecting a water flow cutoff agent (grout) comprising colloidal silica as the main component, a water flow cutoff agent comprising a water-soluble urethane diluted with water, or a water flow cutoff agent comprising a mixture of the above two kinds of water flow cutoff agents into a water-leaking part or a cavity. Also disclosed is a method of cutting off water flow by grouting characterized by injecting a water flow cutoff agent comprising colloidal silica as the main component into a water-leaking part or a cavity and then injecting thereinto a water flow cutoff agent comprising a water-soluble urethane diluted with water or a water flow cutoff agent comprising a mixture of a water flow cutoff agent comprising colloidal silica as the main component with a water flow cutoff agent comprising a water-soluble urethane diluted with water. The water flow cutoff agents according to the present invention are nonpolluting and provide hardened products having excellent water pressure resistance and durability.
REFERENCES:
patent: 4315703 (1982-02-01), Gasper
patent: 4904304 (1990-02-01), Watanabe et al.
Asahi Denki Kogyo K.K.
Friedman Carl D.
Smith Creighton
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