Polyisocyanate binder having low toluene diisocyanate content

Details Polyisocyanate binder having low toluene diisocyanate content Polyisocyanate binder having low toluene diisocyanate content

1984-10-19

1985-10-01

Torrence, Dolph H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

260453SP, 252182, 528 59, 528492, C07C12506, C07C119048

Patent

active

045447632

ABSTRACT:
Urethane-modified polyisocyanates prepared from toluene diisocyanate are desirable for economic, processing, and product property reasons. Such products should be low in viscosity to allow spray application and low in free TDI content to avoid undue physiological hazard.
By use of prescribed reaction condition and reactant ratios, a suitable product can be prepared from hydroxyl-terminated polyoxyalkylene compounds, toluene diisocyanate, and diphenylmethane diisocyanate.

REFERENCES:
patent: 4061662 (1977-12-01), Marans et al.
patent: 4385171 (1983-05-01), Schnabel et al.

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