Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1997-09-30
1999-05-25
Gorr, Rachel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524871, 528 48, 528 59, 4273899, 474268, 1563317, 25218222, C08G 1810
Patent
active
059070145
ABSTRACT:
Disclosed is an aromatic diisocyanate prepolymer combined with a dibasic ester, preferably a mixed dialkyl ester of adipic, glutaric and succinic acids, which when used with amine or polyol curatives to make solid, non-foamed elastomeric polyurethane and/or polyurethane/urea products reduces viscosity and improves wettability of the castable polyurethane prepolymer without loss of cured physical properties. This improved wettability of the liquid prepolymer is useful for impregnation of fabrics, preferably polyesters, during the manufacture of a polyurethane coated fabric type belting.
REFERENCES:
patent: 3962511 (1976-06-01), Foti
patent: 4273179 (1981-06-01), Gardikes
patent: 4490518 (1984-12-01), Fuzesi et al.
patent: 5102919 (1992-04-01), Swab
patent: 5114985 (1992-05-01), Kuyizin
DBE Purges Polyurethane Equipment Without Methylene Chloride Risks, Elastomerics, Oct. 1990, pp. 56-60.
Dibasic Esters (DBE), Dupont Technical Information Aug., 1994.
Gorr Rachel
Thompson Raymond D.
Uniroyal Chemical Company, Inc.
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