Phenolic resin method

Abstract

The invention relates to a method, a device, a binder system, and a material system for producing components using layering technology, wherein the temperature in the building space and/or in the applied material is set to at least 70° C. and maintained for at least 2 hours. Areas on which binder has been selectively applied, solidify and form the component.

What is claimed is: 
     
         1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . A binder system comprising monomers, oligomers or/and polymers and a solvent. 
     
     
         8 . A material system, comprising a particulate material and a binder system according to  claim 7 . 
     
     
         9 . A device for producing a component, said device comprising a construction space with a construction platform, means for applying a particulate material, means for selectively applying a binder system, means for adjusting a temperature in the construction space or/and the particulate material. 
     
     
         10 . (canceled) 
     
     
         11 . The binder system of  claim 7 , wherein the solvent is an aqueous or alcoholic solvent. 
     
     
         12 . The binder system of  claims 7 , wherein the binder system includes a pre-polymeric phenolic resin. 
     
     
         13 . The binder system of  claim 7 , wherein the solvent includes water and an alcohol. 
     
     
         14 . The binder system of  claim 7 , wherein the binder system is for the layered construction of components, wherein the binder system is capable of being selectively applied to a particulate material consisting of particles. 
     
     
         15 . The binder system of  claim 14 , wherein the binder system is capable of being printed with a print head to a construction space having a temperature of at least 70° C. for at least 2 hours. 
     
     
         16 . The binder system of  claim 15 , wherein the binder system comprising:
 i) one or more monomers,   ii) one or more oligomers or polymers, and   iii) a solvent.   
     
     
         17 . The binder system of  claim 15 , wherein the binder includes a phenol-formaldehyde co-condensate having below 5% residual phenol and below 0.3% residual formaldehyde. 
     
     
         18 . The binder system of  claim 17 , wherein the binder system solidifies for binding a sand, a ceramic material, or a metal. 
     
     
         19 . The binder system of  claim 16 , wherein the binder system has a viscosity of 5 to 20 mPa. 
     
     
         20 . The binder system of  claim 16 , wherein the binder system has a surface tension of 30 to 50 mN/m. 
     
     
         21 . The binder system of  claim 16 , wherein the binder system reversibly dries, and wherein a reversible drying-up of a print head with the binder takes at least 1 minute at 70° C. 
     
     
         22 . The binder system of  claim 16 , wherein binder is only slightly reactive at room temperature. 
     
     
         23 . The binder system of  claim 16 , wherein the binder system, after printing in a build space having a homogeneous temperature of 70° C. has a diffusion length of 75 to 1200 μm. 
     
     
         24 . The binder system of  claim 17 , wherein the solvent includes water and an alcohol. 
     
     
         25 . The binder system of  claim 24 , wherein the binder system is capable of being printed with a print head to a construction space having a homogenous temperature of 80° C. to 150° C. that is maintained for 3 to 10 hours. 
     
     
         26 . The binder system of  claim 22 , wherein the binder system is for the layered construction of components, wherein the binder system is capable of being selectively applied to a particulate material consisting of particles. 
     
     
         27 . The material system of  claim 25 , wherein
 the particulate material is a plastic material, a sand, a ceramic material, or a metal; and   the particulate material has an average grain size of at least  8  pm;   wherein the binder system includes   i) one or more monomers,   ii) one or more oligomers or polymers, and   iii) a solvent;   optionally, wherein the solvent is an aqueous solvent; and   optionally, wherein the binder includes a phenol-formaldehyde co-condensate having below 5% residual phenol and below 0.3% residual formaldehyde.