use of a resin, resin, resin-coated particulate material or mixture of resin-particulate material, method for preparing a resin, method for preparing a resin-coated particulate material, use of resin-coated particulate material, resin preparation, shell or shell core, process for coating and / or agglomerating a particulate material, process for producing resin-coated particles, shell molding process for producing a shell mold or shell core, hydraulic fracturing process and process for preparing an abrasive bonded resin for grinding, deburring grinding or wheel cutting

摘要

summary “use of a resin, resin, resin-coated particulate material or mixture of resin particulate material, method of preparing a resin, method of preparing a resin-coated particulate material, use of resin-coated particulate material, resin preparation, shell mold or shell core, process for coating and / or agglomerating a particulate material, process for producing resin-coated particles, shell molding process for producing a shell mold or shell core, process for Hydraulic Fracture and Process for Preparing an Abrasive Bonded Resin for Grinding, Deburring Grinding or Wheel Cutting ”This invention relates to a resin, prepared by reacting a phenol / formaldehyde novolac with tetraethyl orthosilicate in a weight ratio above 20 : 1, wherein phenol of phenol / formaldehyde novolac is substituted or unsubstituted hydroxybenzene or a mixture of two or plus such phenols, and to a particulate material coated with said resin. said particles may be used, for example, in a shell molding process for the production of shell molds and shell cores; and as propellants for use in the hydraulic fracture process. 1