Method for the synthesis of polymers, which have polyurethane an

Details Method for the synthesis of polymers, which have polyurethane an Method for the synthesis of polymers, which have polyurethane an

1994-05-09

1995-05-23

Kight, III, John

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 65, 528 66, 528274, 528275, 528279, 528282, 528288, 528480, 528485, 528502, C08G 1808, C08G 1832

Patent

active

054183111

ABSTRACT:
Polymers, which have polyurethane and/or polyurea groups and contain finely divided fillers, are synthesized by reacting compounds, which contain at least two hydroxyl and/or amino groups, with at least difunctional isocyanates, optionally in the presence of catalysts, and mixing with suitable fillers. The compounds, containing hydroxyl and/or amino groups, and the isocyanates, are separately mixed intimately with finely divided solids so that flowable powders are obtained. The powders obtained are mixed in a stoichiometrically required amount, and the powder mixture is subjected to the action of shear forces at, if necessary, a higher temperature. The mixture of solids obtained has a shelf life of several days or weeks without reaction between the reactive compounds contained therein.

REFERENCES:
patent: 4105594 (1978-08-01), Dieterich et al.

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