Preparation of isocyanate-terminated polyurethanes containing am

Details Preparation of isocyanate-terminated polyurethanes containing am Preparation of isocyanate-terminated polyurethanes containing am

1984-07-19

1985-04-02

Welsh, Maurice J.

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

Synthetic resins

From silicon reactant having at least one...

528905, C08G 1838

Patent

active

045088896

ABSTRACT:
A process is disclosed in which polyalkoxy amino silane adhesion promoters are incorporated into isocyanate-functional polyurethane resins formed by the reaction of a stoichiometric excess of organic polyisocyanate with an hydroxy-functional resin without producing cloudy and/or unstable resin solutions. In this process, the hydroxy-functional resin is prereacted with the alkoxy functionality of the amino silane in a reaction which liberates alcohol, and then a stoichiometric excess of the organic polyisocyanate is added to cause the isocyanate groups of the polyisocyanate to react with both the hydroxy groups and the amino hydrogen atoms present.

REFERENCES:
patent: 3632557 (1972-01-01), Brode et al.
patent: 4345053 (1982-08-01), Rizk et al.
patent: 4374237 (1983-02-01), Berger et al.
patent: 4468492 (1984-08-01), Piccivilli et al.

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