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1. 发明专利

JPH072969A PRODUCTION OF RIGID POLYURETHANE FOAM 失效
公开(公告)号：JPH072969A
公开(公告)日：1995-01-06
申请号：JP16846893
申请日：1993-06-15
申请人： SANYO CHEMICAL IND LTD
发明人： KATO NORIKAZU , TOGARIYAMA MASAHIRO , ISHIKAWA ISAO , KUMAGAI YASUSHI
IPC分类号： C08G18/08 , C08G18/00 , C08G18/48 , C08G101/00 , C08J9/14
摘要： PURPOSE:To obtain a rigid polyurethane foam excellent in dimensional stability and heat insulating properties by conducting a process for obtaining the foam by reacting a polyol with a polyisocyanate in the presence of a blowing agent, wherein specified compounds are used as the polyol and the blowing agent. CONSTITUTION:A process for obtaining the foam by reacting a polyol with a polyisocyanate (e.g. polymethylene polyphoenyl isocyanate) in the presence of a blowing agent, which process comprises at least an active hydrogen compound (alkylene oxide adduct) (e.g. sorbitol) is used as the polyol, and an H- containing halohydrocarbon (e.g. HCFC-141b) and/or water are used as the blowing agent, is provided.

2. 发明专利

JPH02275191A EMBEDDED PIPING AND ITS MANUFACTURE 失效
公开(公告)号：JPH02275191A
公开(公告)日：1990-11-09
申请号：JP9497689
申请日：1989-04-14
申请人： NORITAKE CO LTD , SANYO CHEMICAL IND LTD
发明人： ASANO HIROSHIGE , GOTO MIKIO , ISHIKAWA ISAO , TOGARIYAMA MASAHIRO
IPC分类号： F16L9/14 , B29C39/10 , B29K75/00 , B29K105/04
摘要： PURPOSE:To improve workability and durability by foam-covering integrally the outer periphery of a tubular body with a hard urethane foaming substance with diphenylmethane isocyanate at least as raw solution for elimination of depression at the time of embedding work in a soft ground. CONSTITUTION:The outer periphery of a tubular body 1 consisting of the most suitable clay pipe for sewage and waste water is integrally foam-covered with a hand urethane foaming substance 2. As the raw solution of the hard urethane foaming substance 2, the essential components are diphenylmethane diisocyanate or polyisocyanate component mainly includes it nitrogen atom contained polyol and foaming agent and if necessary, catalyst, and besides other assistant and additive are contained. By covering the tubular body with hard urethane foaming substance, compressive strength, bending strength, etc., are improved, and apparent specific gravity of the hard urethane foaming substance becomes small like 0.03-0.2. It is thus possible to eliminate depression and breakage at the time of embedding work in a soft ground for improved workability and durability.

3. 发明专利

JPS62115066A WATER-ABSORBING RESIN COMPOSITION 失效
公开(公告)号：JPS62115066A
公开(公告)日：1987-05-26
申请号：JP25615885
申请日：1985-11-14
申请人： SANYO CHEMICAL IND LTD
发明人： KUMAGAI YASUSHI , TOGARIYAMA MASAHIRO
IPC分类号： C08B31/00 , C08K5/36 , C08L89/00 , C08L101/00 , C09K3/00
摘要： PURPOSE:To provide the titled compsn. which has a high thickening effect at a low concn. can retain stably its thickening effect against heat and light and can impart desired dryness, consisting of a water-insoluble water-absorbing resin, a specified N-oxypyridine-2-thiol derivative and a solvent. CONSTITUTION:0.01-5pts. powdered, particulate or flaky water-insoluble water- absorbing resin (A) (e.g., a hydrolyzate of a starch/acrylonitrile graft polymer) obtd. by polymerizing starch or cellulose (a) with a water-soluble monomer, etc. (b) and a crosslinking agent, etc. (c) and optionally hydrolyzing the polymer is uniformly mixed with 0.001-0.5pts. N-oxypyridine-2-thiol derivative (B) of the formula [wherein R is H, halogen, a 1-10C alkyl, an alkenyl, an aryl, an aralykyl, etc.; M is H, an alkali metal, an alkaline earth metal, NH4, lower amine cation] and 100pts. solvent (c) consisting of 100-40pts. water and 0-60pts. polyhydric alcohol (its oxyalkylene ether) (e.g, polyethylene glycol).

4. 发明专利

JPS63245420A PRODUCTION OF POLYISOCYANURATE FOAM 失效
公开(公告)号：JPS63245420A
公开(公告)日：1988-10-12
申请号：JP8043787
申请日：1987-03-31
申请人： SANYO CHEMICAL IND LTD
发明人： SAJI TOSHIHIRO , TOGARIYAMA MASAHIRO
IPC分类号： C08G18/02 , C08G18/54
摘要： PURPOSE:To obtain the title foam having a good compatibility with a halohydrocarbon blowing agent and excellent resistance to flame and smoking, by reacting an excess organic polyisocyanate with a specified mixed polyol in the presence of a blowing agent. CONSTITUTION:In the reaction of an excess organic polyisocyanate (e.g., diphenylmethane diisocyanate) with a polyol in the presence of a blowing agent and, optionally, a trimerization catalyst, said polyol comprises a mixture of at least 5%, based on the total polyol, novolac phenolic resin polyol (A) [e.g., an adduct of (pentafunctional) novolac phenolic resin with propylene oxide], at least 5%, based on the total polyol, polyester polyol (B) (e.g., a reaction product of phthalic anhydride with diethylene glycol) and a polyether polyol (C) (e.g., an adduct of glycerol with propylene oxide). The title foam having a good compatibility with a halohydrocarbon blowing agent, a low calorific value of combustion and excellent resistance to flame and smoking can be obtained.

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