Refractory laminate based on positive sols and polymer lattices containing anionic surfactants

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 OF AN INORGANIC SUBSTANCE TO FORM A COATING ON THE SURFACE, CONTACTING THE COATED SURFACE WITH A POLYMER LATEX CONTAINING AN ANIONIC SURFACTANT TO FIRMLY SET THE COATING, AND REMOVING EXCESS POLYMER LATEX 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 COATINGS IN VERY SHORT TIMES WITHOUT INTERMEDIATE DRYING AND WITHOUT SLOUGHING OF COATS. THE PROCESS IS PARTICULARLY SUITED FOR MAKING EXPENDABLE REFRACTORY SHELL MOLDS FOR PRECISION INVESTMENT CASTING OF METALS BY THE SO-CALLED "LOST-WAX" TECHNIQUE.

Inventors

• 👤 E Moore

Bibliographic Details