Ester hardeners for phenolic resin binder systems

Details Ester hardeners for phenolic resin binder systems Ester hardeners for phenolic resin binder systems

1990-10-18

1991-07-30

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, 525491, C08K 336

Patent

active

050361163

ABSTRACT:
A hardener composition for alkaline phenolic resole resin binders which comprises a solution of a benzylic ether resole resin in an ester. Binder compositions comprising this hardener with alkaline phenolic resole resins are further provided as are foundry molding compositions and methods for making foundry cores and molds using the molding compositions.

REFERENCES:
patent: 3485797 (1969-12-01), Robins
patent: 4246157 (1981-01-01), Laitar
patent: 4426467 (1984-01-01), Quist et al.
patent: 4474904 (1984-10-01), Lemon et al.
patent: 4546124 (1985-10-01), Laitar et al.
patent: 4657950 (1987-04-01), Iyer et al.
patent: 4740535 (1988-04-01), Iyer et al.
patent: 4789693 (1988-12-01), Jhaveri et al.
patent: 4988745 (1991-01-01), Iyer et al.

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