Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-09-17
1977-10-25
Cockeram, H.S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 25AT, 260 25AY, 260 25BD, 260 75NT, 260453SP, 260453P, 260453AR, 264 50, C08G 1876, C08G 1814, B29D 2700
Patent
active
040555488
ABSTRACT:
A novel liquid isocyanate prepolymer composition is disclosed. The prepolymer is obtained by reacting a polymethylene polyphenylisocyanate containing from about 65 to about 85 percent by weight of methylenebis(phenylisocyanate) the remainder of said polymethylene polyphenylisocyanates having a functionality greater than 2, with from about 0.0185 to about 0.15 equivalent per equivalent of said polyphenylisocyanate of a polyoxyethyleneglycol having an average molecular weight of from about 200 to about 600. The liquid isocyanates so produced are characterized as storage stable liquids of relatively low viscosity which when used as the isocyanate component in polyurethane formulations, particularly molded polyurethanes, give rise to highly resilient and useful molded products.
REFERENCES:
patent: 3644457 (1972-02-01), Koenig et al.
Carleton Peter S.
Ewen, Jr. James H.
Reymore, Jr. Harold E.
Cockeram H.S.
Firth Denis A.
Rose James S.
The Upjohn Company
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