Process for polyurethane prepolymers containing terminal isocyan

Details Process for polyurethane prepolymers containing terminal isocyan Process for polyurethane prepolymers containing terminal isocyan

1984-02-09

1984-12-11

Welsh, Maurice J.

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...

1563314, 528 52, 528 67, C08G 1810

Patent

active

044879105

ABSTRACT:
Process for the production of polyurethane prepolymers based on monocyclic and dicyclic diisocyanates, in which a prepolymer based on a dicyclic diisocyanate is produced in a prepolymer based on a monocyclic diisocyanate of comparatively lower reactivity. The products obtained by this process contain terminal isocyanate groups and are distinguished by a reduced content of free monomeric diisocyanates.

REFERENCES:
patent: 3839491 (1974-10-01), Gamero et al.
patent: 4038239 (1977-07-01), Coyner et al.
patent: 4111865 (1978-09-01), Seefried et al.
patent: 4423200 (1983-12-01), Ganster et al.
(cf. H. G. Elias, Makromolekule, Huthig & Wepf, Basel, 4th Edition 1981) Heidelbert, New York.

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