Hydrophilic polyurethane foams with good wet strength

Details Hydrophilic polyurethane foams with good wet strength Hydrophilic polyurethane foams with good wet strength

1977-02-28

1978-11-28

Cockeram, H.S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

260 292TN, 260859R, 521159, 521164, 521167, 521905, C08G 1814, C08G 1854

Patent

active

041275160

ABSTRACT:
Disclosed herein is a polyurethane foam having good wet strength. The foam is prepared by reacting a urethane prepolymer with large amounts of water containing a poly(amino)urea and optionally other ingredients, e.g. surfactants. The poly(amino)urea is characterized as being the water soluble reaction product of a polyamine with a urethane prepolymer, said reaction product being further reacted with a crosslinking agent, e.g. epichlorohydrin.

REFERENCES:
patent: 3002937 (1961-10-01), Parker et al.
patent: 3836493 (1974-09-01), Matsuda et al.
patent: 3854535 (1974-12-01), Kehr et al.
patent: 3892696 (1975-07-01), Wood
patent: 3903232 (1975-09-01), Wood et al.
patent: 3939105 (1976-02-01), Jones et al.
patent: 3940542 (1976-02-01), Kerupf et al.
patent: 3953406 (1976-04-01), Marsh
patent: 4073840 (1978-02-01), Saidla
Kirk-Othmer--Encyclopedia of Chemical Technology, 2nd Edition, vol. 9, (1966), p. 849.

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