Polyurethane binder compositions

Details Polyurethane binder compositions Polyurethane binder compositions

1984-10-12

1985-10-08

Ivy, C. Warren

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525504, C08G 1806

Patent

active

045461244

ABSTRACT:
A foundry binder composition which provides foundry cores and molds of superior hot strength comprises a polyisocyanate, a polyhydroxy component and a catalyst. The polyhydroxy component is an alkoxy modified phenolic resole resin containing at least one alkoxy methylene group for every six phenolic nuclei in the resin.

REFERENCES:
patent: 2079633 (1937-05-01), Rothrock
patent: 3409579 (1968-11-01), Robins
patent: 3676392 (1972-07-01), Robins
patent: 3726867 (1973-04-01), Robins
patent: 3894981 (1975-07-01), Kruglikov et al.
patent: 4079031 (1978-03-01), Sardessai
patent: 4116916 (1978-09-01), Holik
patent: 4317896 (1982-03-01), Holik
patent: 4358570 (1982-11-01), Tobinaga
patent: 4436881 (1984-03-01), Laitar

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