RIGID POLYURETHANE FOAM AND REFRIGERATOR USING THE SAME

• Main Authors: ARAKI KUNINARI, ITO YUTAKA, GANO MASAYOSHI, KOMURO ATSUSHI, YOKOKURA HISAO, FUKUDA KATSUMI
• Format: Patent
• Language: English; Korean
• Published: 25.06.2001
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; CHEMISTRY; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COMPOSITIONS BASED THEREON; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; GENERAL PROCESSES OF COMPOUNDING; HEAT PUMP SYSTEMS; HEATING; ICE-BOXES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REFRIGERATION OR COOLING; REFRIGERATORS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE: To obtain a rigid polyurethane foam reduced in amount of blistering and to provide a refrigerator prevented from deformation when filling a heat insulating material without installing a reinforcing member by using the rigid polyurethane foam. CONSTITUTION: A first polyol component prepared by adding an alkylene oxide to m-tolylenediamine and a second polyol component obtained by adding an alkylene oxide to o-tolylenediamine are essential in a polyol and the content of the first polyol component is not lower than that of the second polyol component.