Huttenes-albertus Chemische Werke Gmbh

Huettenes-albertus Chemische Werke Gmbh

Aleksandar Vujevic

Marek A Torbus

Gerard Ladegourdie

Franz Jerman

Willi Seiss

Dirk Lingemann

Cold-setting moulding binders and their use (phenols and gaseous acetals)

This relates to a bonding agent which is used for the production of molded foundry parts and which is composed of two basic components which harden out cold in the mixture of the molded material in the presence of a catalyst under the formation of polyurethane. One basic component is a polyol in the form of a solution of a co-condensate containing an OH group consisting of phenol, aldehyde and an alkyl phenyl siloxane with a contents of at least 3% by weight in free OH groups, if applicable in mixture with a phenol aldehyde condensate containing an OH group, and the second basic component is a polyisocyanate likewise dissolved under normal conditions. Appropriately the solvent has a content in vegetable oils, preferably castor oil.

Bonding agent cold-hardening under the formation of polyurethane for

A cold setting molding material which includes sand and a polyurethane binder with the polyol portion of the polyurethane reaction mixture containing a tertiary amino group and phenolic hydroxyl groups.

Polyurethane-based binder, as well as the production thereof

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Ratingen, Germany

Aleksandar Vujevic