Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1985-01-25
1985-10-29
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521137, C08G 1814
Patent
active
045501262
ABSTRACT:
A hydrophilic, flexible, open cell polyurethane-poly(N-vinyl lactam) interpolymer foam is obtained from the process which comprises reacting under interpolymer and foam-forming conditions (a) a substantially linear isocyanate-capped polyether polyol prepolymer having an average reactive functionality of less that about 2.0 with (b) a poly(N-vinyl lactam) and (c) a foam-forming amount of water in the presence of (d) a cell formation-regulating amount of surface active agent. The foams exhibit unexpectedly higher levels of absorptivity for aqueous fluids compared to those of known crosslinked foams. The foams herein are especially useful for the manufacture of a variety of dental and biomedical products including surgical bandages and dressings, laparotomy sponges, medicament carriers, and the like, where the capability for absorbing body fluids is an important performance criterion.
REFERENCES:
patent: 2726219 (1955-12-01), Hill
patent: 2901445 (1959-08-01), Harris
patent: 2965584 (1960-12-01), Elkin
patent: 3270032 (1966-08-01), Erner
patent: 3383351 (1968-05-01), Stamberger
patent: 3694301 (1972-09-01), Gruenewald et al.
patent: 3746663 (1973-07-01), Beale et al.
patent: 3890254 (1975-06-01), Guthrie
patent: 3903232 (1975-09-01), Wood et al.
patent: 3914188 (1975-10-01), Carroll et al.
patent: 3961629 (1976-06-01), Richter et al.
patent: 3972328 (1976-08-01), Chen
patent: 3975350 (1976-08-01), Hudgin et al.
patent: 3975567 (1976-08-01), Lock
patent: 3978266 (1976-08-01), Lock
patent: 3978855 (1976-09-01), McRae et al.
patent: 4100309 (1978-07-01), Micklus et al.
patent: 4119094 (1978-10-01), Micklus et al.
patent: 4127124 (1978-11-01), Clagett et al.
patent: 4137200 (1979-01-01), Wood et al.
patent: 4160076 (1979-07-01), Guthrie et al.
patent: 4202880 (1980-05-01), Fildes et al.
patent: 4235988 (1980-11-01), Fildes et al.
patent: 4339550 (1982-07-01), Palinczar et al.
Hydromer, Inc.
Welsh Maurice J.
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