|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B32B-001/02 B32B-001/10 B32B-009/00|
|미국특허분류(USC)||428/68 ; 53/431 ; 53/434 ; 428/69|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 5|
Precipitated silica, formed by the interaction of sodium water glass and sulfuric acid, followed by mechanical processing, is employed as an insulating material having a low thermal conductivity. The precipitated silica is dried, compressed, placed in an evacuable pouch, and evacuated. The resulting board-like insulation configuration is used directly as insulation in, for example, household refrigerators.
A slab of board-like material for use as thermal insulation comprising: a. finely divided silica material formed by the interaction of an alkaline water glass and a mineral acid to precipitate silica, followed by a drying action to form a dried, finely divided silica; and b. a gas and water-tight envelope containing said dried, finely divided silica.