Patent ID: 6855279

Claim:
A weather-resistant exterior building material comprising a compact formed of a fire-resistant CRB ceramic, the fire-resistant CRB ceramic being obtained by mixing and kneading defatted bran derived from rice bran with a thermosetting resin consisting of at least one resin selected from the group consisting of phenolic resins, diaryl phthalate resins, unsaturated polyester resins, epoxy resins, polyamide resins and triazine resins to form a resulting mixture, the mixing ratio by weight between the defatted bran and the thermosetting resin being in the range from 50:90 to 50:10; primarily baking the resulting mixture in an inert gas at a temperature of from 700 to 1000° C. to form a resulting compact; pulverizing the resulting compact into carbonized powder; mixing and kneading the carbonized powder with a ceramic powder, a solvent and a binder to provide a plasticized mixture; pressure-forming the plasticized mixture at a pressure of 10 MPa to 100 MPa to form a pressure-formed compact; and heat-treating the pressure-formed compact in an inert gas atmosphere or an atmosphere not containing oxygen at a temperature of from 100 to 1100° C., wherein the ceramic powder is at least one powder selected from the group consisting of SiO 2 , Si 3 N 4 , ZrO 2 , Al 2 O 3 , SiC, BN, WC, TiC, sialons, porcelain clay, feldspar clay and kaolin and the blending ratio of ceramic powder to carbonized powder is 30-100 parts by weight based on 100 parts by weight of carbonized powder.