Appeal No. 95-4985
Application No. 08/164,227
APPEALED SUBJECT MATTER
The subject matter on appeal is directed to a process for
the continuous production of polyurethane and polyurethane
urea prepolymers. This subject matter is adequately described
in claim 1 which is reproduced below.
1. In a process for the continuous production of
polyurethane and polyurethane urea prepolymers by reaction of
A) one or more organic polyisocyanates, with
B) one or more isocyanate-reactive compounds having
molecular weights of from 400 to 10,000 and being
selected from the group consisting of polyhydroxy
compounds, polyamine compounds, and mixtures
thereof,
C) optionally in the presence of one or more
monofunctional compounds, and
D) optionally in the presence of activators,
stabilizers, lubricants and other additives,
with the quantities of reactive components being selected such
that the equivalent ratio of isocyanate groups to isocyanate-
reactive groups is from 11.1:1 to more than 1.5:1, the
improvement wherein the components are combined in a nozzle
which has a constriction and wherein
a) either the isocyanate-containing components or
the isocyanate-reactive components are passed
axially through the constriction of the nozzle,
b) the other components are introduced laterally
into the stream of components passing
through the constriction via several bores
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007