Novel molding materials

Details Novel molding materials Novel molding materials

1989-09-14

1991-08-27

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524541, 528162, C08K 551

Patent

active

050433652

ABSTRACT:
A granular molding material with a binder comprising a phenol novolac and a polyisocyanate which hardens upon addition of amine catalysts wherein the molar ratio of phenol to formaldehyde in the novolac is 1:0.25 to 1:0.5 and has the formula ##STR1## wherein R, R' and R" are individually selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, hydroxy, cycloalkyl of 3 to 12 carbon atoms and an anellated ring and X is an integer from 0 to 4 or >4 with the percent molar distribution based on X is as follows:

REFERENCES:
patent: 3590902 (1971-07-01), Westwood et al.
patent: 3686106 (1972-08-01), Tideswell
patent: 3726867 (1973-04-01), Robins
patent: 4072649 (1978-02-01), Kubens
patent: 4436881 (1984-03-01), Laitar
patent: 4590229 (1986-05-01), Gardikes

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