Modified crude toluene diisocyanate to obtain polyurethane with

Details Modified crude toluene diisocyanate to obtain polyurethane with Modified crude toluene diisocyanate to obtain polyurethane with

1982-08-30

1984-01-31

Phynes, Lucille M.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

260453AR, 521 59, C08G 1810

Patent

active

044290985

ABSTRACT:
Modified crude toluene diisocyanate characterized by the fact that it is obtained by reaction first of a crude toluene diisocyanate with a polyol in such a quantity that the lowering of the isocyanate concentration of the crude toluene diisocyanate at the most amounts to about 2.0--NCO groups per kilogram of crude toluene diisocyanate and by the fact that in a second step the above reaction product is aged under heat application for such a temperature and period of time that the lowering of the isocyanate concentration of this reaction product at the most amounts to 0.4--NCO groups per kilogram of product. This modified crude toluene diisocyanate can be used for making high resiliency polyurethane foam with improved properties.

REFERENCES:
patent: 3943158 (1976-03-01), Dieterich et al.
patent: 3959329 (1976-05-01), Dieterich et al.
patent: 4051166 (1977-09-01), Richter et al.
patent: 4055548 (1977-10-01), Carleton et al.
patent: 4169175 (1979-09-01), Marans et al.
patent: 4320067 (1982-03-01), Von Bonin et al.
patent: 4340712 (1982-07-01), Reichmann et al.

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