Heat-setting mixtures of a polyisocyanate with a polyol which ha

Details Heat-setting mixtures of a polyisocyanate with a polyol which ha Heat-setting mixtures of a polyisocyanate with a polyol which ha

1984-02-21

1985-03-26

Cockeram, Herbert S.

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...

528 44, 528 60, 528902, 528 73, C08G 1880, C08G 1832, C08G 1834

Patent

active

045074569

ABSTRACT:
In heat-setting mixtures of a polyisocyanate with a polyol which have a long shelf life at room temperature, the polyisocyanate is present, in the form of discrete particles, in the polyol, and the polyisocyanate particles are deactivated at their surface. From 0.01 to 0.499 equivalent percent of the total amount of isocyanate groups present is deactivated by a primary or secondary amine or water, or from 0.01 to 20 equivalent percent of the said isocyanate groups is deactivated with a compound containing carboxyl, phenolic hydroxyl, amide or hydrazide groups.
These mixtures are useful as coating compositions, adhesives and sealant materials, particularly as undersealants for motor vehicles.

REFERENCES:
patent: 3457200 (1969-10-01), Kallert et al.
patent: 3655627 (1972-04-01), Hutzler et al.
patent: 4029626 (1977-06-01), Gillemot et al.
patent: 4068086 (1978-01-01), Dalibor
patent: 4070346 (1978-01-01), Schnoering et al.
patent: 4251427 (1981-02-01), Recker et al.
patent: 4400497 (1983-08-01), Blum et al.
Vieweg/Hoechtlen, Polyurethane (Carl Hanser Verlag, Munich) 1966, pp. 11 et seq.
Hartmann et al., Org. Coatings & Appl. Polymer Sci., vol. 46, 1982, pp. 429-432.
Weinmann, Beschictungen mit Lacken und Kunststoffen (Verlag Colom. Stuttgart) 1967, pp. 103 et seq.

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