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公开(公告)号：JP2001310923A
公开(公告)日：2001-11-06
申请号：JP2001018797
申请日：2001-01-26
Applicant: BRIDGESTONE CORP
Inventor： MIZUTA KAZUHIKO , ISHII MASASHI
IPC: C08J9/14 , C08G18/00 , C08G101/00
Abstract: PROBLEM TO BE SOLVED: To provide a hard polyurethane foam having a improved insulating property, flame resistance and low density by using a comparatively lot of a hydrofluorocarbon(HFC) as a foaming agent which has no problem on ozone layer destruction and having no problem of internal pressure rise of the blended solution, even when applying a polyesterpolyol which is obtained by reacting a polyol with phthalic acid or phthalic acid derivatives which applied. SOLUTION: The hard polyurethane foam is obtained by foaming and blending a polyisocyanate component, polyol component, foaming agent and other assistant. The hard polyurethane foam is made of a bubble diameter of 50-400 μm, independent bubble fraction of 50% or more, core density of 20-45 kg/m3, oxygen index (JIS K7201) of 22 or more and coefficient of heat conductivity of 0.022 W/m.K or less, by applying the HFC which contains a 1,1,1,3,3- pentafluorobutane as a foaming agent.
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公开(公告)号：JPH11188787A
公开(公告)日：1999-07-13
申请号：JP36685897
申请日：1997-12-26
Applicant: BRIDGESTONE CORP
Inventor： MURAKAWA YUKA , ISHII MASASHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for rapidly thermoforming with high thermal efficiency to manufacture a uniform molded product having a good external appearance quality without fault such as a molding having a projection and recess part responsive to a pattern or a color, a color change or a remarkably deteriorated external appearance in the case of thermoforming a resin sheet having an area decorated with a pattern, a character or the like. SOLUTION: In the method for thermoforming by using a resin sheet comprising the steps of heating to soften a thermoplastic resin sheet 1, forming it by a vacuum molding, pneumatic molding or the like, and cooling to solidify it; in the case of heating to soften the sheet 1, an infrared ray or a far infrared ray having a peak (λmax) of a wavelength of 2 μm or more is used as a heating source. The sheet is an acrylic resin, thermoplastic polyester resin, polycarbonate resin, polystyrene resin, polyamide resin, ABS resin, a mixed resin of two or more components selected from them, or a copolymer resin of monomers for these resins.
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公开(公告)号：JPH1149839A
公开(公告)日：1999-02-23
申请号：JP15930398
申请日：1998-06-08
Applicant: BRIDGESTONE CORP
Inventor： OMORI NAOYUKI , MIZUTA KAZUHIKO , ISHII MASASHI
Abstract: PROBLEM TO BE SOLVED: To obtain an airless spray foaming type polyurethane foam excellent in flame-retardance. SOLUTION: This rigid polyurethane foam is obtained by subjecting a polyisocyanurate component, a polyol component, a blowing agent, a catalyst, a foam stabilizer and other auxiliaries to spray foaming. The polyol component contains >=40 wt.% of a polyester polyol compound obtained by esterifying a hydroxy component with one or more polybasic acid components of o-, m-, p-phthalic acid and their derivatives. Further a blowing agent of a gas at a normal temperature under normal pressure in an amount of =20 mol.% and the ratio of 4,4'-MDI is >=35 mol.% is used.
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公开(公告)号：JPH1149838A
公开(公告)日：1999-02-23
申请号：JP15930498
申请日：1998-06-08
Applicant: BRIDGESTONE CORP
Inventor： OMORI NAOYUKI , MIZUTA KAZUHIKO , ISHII MASASHI
IPC: C08J9/12 , C08G18/00 , C08G18/08 , C08G18/42 , C08G101/00
Abstract: PROBLEM TO BE SOLVED: To obtain an airless spray foaming type polyurethane foam excellent in flame-retardance and surface properties. SOLUTION: This rigid polyurethane foam is obtained by mixing a polyisocyanurate component at a mixing head with a compounded solution prepared by blending a polyol component with a blowing agent, a catalyst, a foam stabilizer and other auxiliaries and subjecting the mixture to spray foaming. The cell diameter of the foam: 50-400 μm. The ratio of the closed cell in cells of the foam: >=50%. The core density: 20-45 kg/m . The oxygen index (JISK7201): >=22. The spray thickness: 15-30 mm. Applicable to JIS A1321 flame-retardant 2 class in a retained state of a skin layer.
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公开(公告)号：JPH09316158A
公开(公告)日：1997-12-09
申请号：JP20466096
申请日：1996-08-02
Applicant: BRIDGESTONE CORP
Inventor： OMORI NAOYUKI , ISHII MASASHI
IPC: C08J9/14 , C08G18/00 , C08G18/42 , C08G101/00
Abstract: PROBLEM TO BE SOLVED: To obtain a flame-retardant rigid polyurethane foam equivalent to that obtained when F11 is used by using a specified amount of a polyesterpolyol in the production of a rigid polyurethane foam by using dichloromonofluoroethane. SOLUTION: In producing a rigid polyurethane foam by using a blowing agent dichloromonofluoroethane (F141b ) as a substitute for F11 from a polyhydroxy compound and a polyisocyanate compound, a polyesterpolyol prepared by esterifying terephthalic acid, isophthalic acid, trimellitic acid or a derivative thereof is used in an amount of at least 20wt.% or above, desirably 40wt.% or above, based on 100wt.% in total of the hydroxy compounds. The blowing agent may contain, if necessary, hydrochlorofluorocarbons other than F141b , methylene chloride, water, etc. The polyisocyanate compound which can be used is an aromatic, alicyclic or aliphatic isocyanate. According to this process, a flame retardancy equivalent to that attained when conventional trichloromonofluoromethane is used can be attained.
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Patent Agency Ranking
公开(公告)号：JPH08302348A
公开(公告)日：1996-11-19
申请号：JP11215595
申请日：1995-05-10
Applicant: BRIDGESTONE CORP
Inventor： HIRAIWA TOSHIHIKO , ISHII MASASHI
Abstract: PURPOSE: To obtain a highly expandable grout which is packed into the cavity formed between a tunnel, an underground structure or the like and the surrounding ground to stop water flowing thereinto and can prevent subsurface water from being contaminated. CONSTITUTION: In forming an expanded cured product by reacting an aqueous sodium silicate (component A) with an isocyanate compound (component B), a polyhydroxy compound prepared by subjecting a polyfunctional alcohol and propylene oxide to a ring-opening addition polymerization and a silicone surfactant are added to component A. This grout can be used also as a reinforcement for improving soft or crushed rock to form strong rock or for improving weak ground such as reclaimed land.
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公开(公告)号：JPH0853565A
公开(公告)日：1996-02-27
申请号：JP18865794
申请日：1994-08-10
Applicant: BRIDGESTONE CORP
Inventor： MIZUTA KAZUHIKO , ARAI AKIRA , ISHII MASASHI
Abstract: PURPOSE:To provide a method for producing the rigid polyurethane foam, capable of limiting its overall density to a density near to that of a rigid polyurethane using a conventional foaming agent, even when a foaming agent, F141b, low in foaming efficiency for preventing the destruction of the ozonosphere is used and even when the temperature of the surface of an article to be sprayed with the foaming composition is low. CONSTITUTION:In the method for producing the rigid polyurethane foam by an air-less spray-foaming method comprising mixing and foaming a polyisocyanate component with a polyol component comprising a catalyst, a foaming agent containing dichloromonofluoroethane, a foam stabilizer, and other auxiliaries in a mixing head, the polyisocyanate component and the polyol component are mixed and foamed at a liquid temperature of 35-55 deg.C in the mixing head.
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公开(公告)号：JP2002038004A
公开(公告)日：2002-02-06
申请号：JP2000227679
申请日：2000-07-27
Applicant: BRIDGESTONE CORP
Inventor： OMORI NAOYUKI , ISHII MASASHI
Abstract: PROBLEM TO BE SOLVED: To provide a polyurethane hardenable composition not allowing a plasticizer to bleed to cause stickiness or dust collection or the like to the detriment of the external appearance even when a water-soluble coating is applied to it serving as a sealing material, and easy to work, and a method for manufacturing the composition. SOLUTION: The polyurethane hardenable composition, whose base is a urethane prepolymer having an isocyanate group at an end, contains 4.5 wt.% or less of a plasticizer and 17 wt.% or more of a polyol hardener having a number-average molecular weight of 3,000 or more. The solubility parameter of the plasticizer should preferably be 9.0-8.0.
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公开(公告)号：JP2001247645A
公开(公告)日：2001-09-11
申请号：JP2000156845
申请日：2000-05-26
Applicant: BRIDGESTONE CORP
Inventor： MIZUTA KAZUHIKO , ISHII MASASHI
IPC: C08J9/14 , C08G18/42 , C08G18/79 , C08G101/00
Abstract: PROBLEM TO BE SOLVED: To provide a rigid (isocyanurate-modified) polyurethane foam which is produced by using a polyester polyol compound which is obtained by the esterification of phthalic acid or a phthalic acid derivative; as a polyol component and a hydrofluorocarbon(HFC) as the foaming agent; is flame-retardant; has no problem or ozonosphere destruction; has no problem of the increasing inner pressure of a mixing solution to foam as described below; and has a density decreased by mixing a relatively large amount of HFC. SOLUTION: The rigid polyurethane foam can be produced by mixing the polyisocyanate component, the polyol component, the foaming agent, a catalyst and the other auxiliaries to foam, wherein said polyol component includes the polyester polyol compound synthesized by the esterification of phthalic acid and/or a phthalic acid derivative and said foaming agent contains two or more HFCs including 1,1,1,3,3-pentafluorobutane.
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公开(公告)号：JP2000038564A
公开(公告)日：2000-02-08
申请号：JP20799298
申请日：1998-07-23
Applicant: BRIDGESTONE CORP
Inventor： IMAI KOICHI , ISHII MASASHI
IPC: C09K3/10
Abstract: PROBLEM TO BE SOLVED: To obtain a sealing material made proof against discoloration without adversely affecting its curability and sealability by incorporating an active sulfur-containing compound. SOLUTION: There is provided a polyurethane sealing material containing at least one active sulfur-containing compound in an amount 0.10-20.0 times the lead content of a lead compound contained as a curing catalyst. The active sulfur-containing compound used is at least one member selected among thiuram compounds such as tetramethylthiuram disulfide, thiazole compounds such as 2-mercaptobenzothiazole, thiourea compounds such as N,N'-diethylthiourea, sulfenamide compounds such as N-t-butyl-2-benzothiazolylsulfenamide, dithiocarbamate compounds such as zinc dimethyldithiocarbamate, and xanthate compounds such as zinc butylxanthate. The lead compound as a curing agent is exemplified by lead octylate, lead naphthenate, and lead versatate.
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