Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-10-31
2000-10-24
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524315, 524318, B22C 122
Patent
active
061368881
ABSTRACT:
This invention describes the use of higher fatty acid methyl esters, i.e. of methyl monoesters of fatty acids having a carbon chain of 12 C atoms or more, for example of rapeseed oil methyl ester, as solvent for the individual or both components of polyurethane binders for molding materials used in foundry technology, the components of which comprise a phenolic resin which contains free OH groups and a polyisocyanate as a reaction participant. The fatty acid methyl esters can be the sole solvent. However, they also can be used, at least for the polyisocyanate, together with a high boiling aromatic hydrocarbon, whereby the amount of the fatty acid methyl ester should exceed the amount of the hydrocarbon, and they can be used, at least for the phenolic resin, together with a solvent of higher polarity.
The use of fatty acid methyl esters entails considerable benefits. In particular, the addition of high-boiling aromatic hydrocarbons which had so far been unavoidable is no longer necessary or can be minimized drastically.
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"New Environmentally Compatible Cold Box Binder System"; Gerard Ladegourdie and Wofgang Schuh; CP+T Casting Plant and Technology International; Issue No. 4, pp. 8-11; 1996.
"First Experiences With An Improved Environment-Friendly Cold-Box-System At Daimler-Benz"; Heinrich Hobelsberger, Helmut Kroger and Dieter Nisi.
"Erste Erfahrungen Mit Einem Weiterentwickelten Umweltvertraglichen Cold-Box-System Bei Daimler-Benz"; Heinrich Hobelsberger, Helmut Kroger and Dieter Nisi.
Ladegourdie Gerad Phillippe
Torbus Marek
Huttenes-Albertus Chemische Werke GmbH
Michl Paul R.
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