Refractory laminate based on positive sols and monofunctional organic acids and salts
Abstract
Abstract A RAPID PROCESS FOR FORMING A REFRACTORY LAMINATE ON THE SURFACE OF A SUPPORT STRUCTURE WHICH COMPRISES DIPPING THE STRUCTURE INTO A BATH COMPRISING A SOL OF POSITIVELY CHARGED COLLOIDAL PARTICLES TO FORM A COATING ON THE SURFACE. CONTACTING THE COATED SURFACE WITH A SOLUTION OR DISPERSION OF A MONOFUNCTIONAL ORGANIC ACID OR SALT TO FIRMLY SET THE COATING, AND REMOVING EXCESS SETTING AGENT SOLUTION OR DISPERSION FROM THE COATED SURFACE. THIS PROCEDURE IS REPEATED UNTIL A LAMINATE OF THE DESIRED THICKNESS IS BUILT UP ON THE SURFACE. THIS TECHNIQUE MAKES IT POSSIBLE TO SUCCESSIVELY APPLY AND SET COATING IN VERY SHORT TIMES WITHOUT INTERMEDIATE DRYING AND WITHOUT SLOUGHING OF COATS. THE PROCESS IS PARTICULARLY SUITED FOR MAKING EXPENABLE REFRACTORY SHELL MOLDS FOR PRECISION INVESTMENT CASTING OF METALS BY THE SO-CALLED "LOST-WAX" TECHNIQUE.
Inventors
- 👤 E Moore
Bibliographic Details
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