The present invention is a granular material that can be well recoated regardless of the type of the granular material, and enables a refractory aggregate in an unprinted portion to be used without any regeneration process, in the manufacture of a three-dimensional laminated and shaped mold. This granular material is a granular material for use in three-dimensional laminated mold shaping, and obtained by adding a material that causes a hydration reaction having a moisture absorbing function and generates a catalytic effect to a coating material mixed with or coated with an acid as a catalyst which activates and hardens an organic binder for binding the granular material.

Polymer concrete and polymer mortar compositions and related methods of producing the same are disclosed. The compositions and methods produce economical, ready-mixed polymer concrete(s) and mortar(s) using a combination of thermoset polymers and emulsified polymers, hardeners, coarse and/or fine aggregates, fillers, shrinkage control agents, and other additives. The polymer concrete and polymer mortars utilize recycled materials.

Polymer concrete and polymer mortar compositions and related methods of producing the same are disclosed. The compositions and methods produce economical, ready-mixed polymer concrete(s) and mortar(s) using a combination of thermoset polymers and emulsified polymers, hardeners, coarse and/or fine aggregates, fillers, shrinkage control agents, and other additives. The polymer concrete and polymer mortars utilize recycled materials.

A particulate sound absorption board and its preparation method. The said particulate sound absorption board consists of binding agent and sound absorption particle; the external surface of sound absorption particle is covered with a layer of binding agent, and the angularity coefficient of particle covered with binding agent is less than 1.3; the said sound absorption particle consists of skeleton particle and filling particle, in which the former is used for sound absorption board skeleton, and the latter flows into the pore between skeleton particles to form sound absorption pore, and the average diameter of cross section of sound absorption pore is 0.07 mm. The two-stage manufacturing technology (i.e. coating, curing and then shaping) is adopted for the said preparation method to prevent the pore between particles from being blocked by excess binding agent, and further improve the angularity coefficient of particle.

A particulate sound absorption board and its preparation method. The said particulate sound absorption board consists of binding agent and sound absorption particle; the external surface of sound absorption particle is covered with a layer of binding agent, and the angularity coefficient of particle covered with binding agent is less than 1.3; the said sound absorption particle consists of skeleton particle and filling particle, in which the former is used for sound absorption board skeleton, and the latter flows into the pore between skeleton particles to form sound absorption pore, and the average diameter of cross section of sound absorption pore is 0.07 mm. The two-stage manufacturing technology (i.e. coating, curing and then shaping) is adopted for the said preparation method to prevent the pore between particles from being blocked by excess binding agent, and further improve the angularity coefficient of particle.

Boric acid is used as an adjuvant for the liquid catalyst used to cure furan-based binder systems for forming a foundry mold in a warm box process. The binder system comprises furfuryl alcohol, a furan resin, and a furan monomer or oligomer containing at least two terminal hydroxymethyl groups. The binder system also comprises a latent acid curing catalyst and the boric acid. The boric acid improves tensile strength of the foundry mix as well as through cure of the binder.