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公开(公告)号：JP2000317573A
公开(公告)日：2000-11-21
申请号：JP12965999
申请日：1999-05-11
Applicant: KAO CORP
Inventor： KAGITANI MASAHIKO , NAKAI SHIGEO
IPC: B22C3/00
Abstract: PROBLEM TO BE SOLVED: To obtain a preventing method of the peculiar defect in a casting in the case of casting by a mold containing phosphorus atom, and a coating agent used to this method. SOLUTION: This preventing method of the defect due to phosphorus in the casting, is executed by applying the coating agent containing 5-30 pts.wt. at least one kind among magnesium oxide, titanium oxide, chronium oxide, manganese oxide, iron oxide, nickel oxide, zinc oxide and zirconium oxide to 100 pts.wt. refractory aggregate on the mold containing >=0.05 wt.% phosphorus atom and casting. In this way, while receiving such merit as to reduce the odor in the case of casting by the mold using the phosphorus containing compound such as phosphoric acid as a hardening agent, the defect in the casting caused by the phosphorus atom can efficiently be prevented.
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公开(公告)号：JPH1190580A
公开(公告)日：1999-04-06
申请号：JP25324197
申请日：1997-09-18
Applicant: KAO CORP
Inventor： SAWA MASUO , NAKAI SHIGEO
Abstract: PROBLEM TO BE SOLVED: To improve the working environment by adding carboxylic acid having >=3 carboxylic groups in one molecule to reduce the content of sulfonic acid and reduce the generation of the gas containing sulfur during the molding and casting. SOLUTION: Addition of oxy-carboxylic acid into the composition of the hardening agent is 3-70 wt.%, preferably, 5-40 wt.%. The content of organic sulfonic acid such as toluene sulfonic acid and xylene sulfonic acid in the composition of the hardening agent can be reduced, and no inconvenience caused by reduction in the hardening sped is generated. Oxy-carboxylic acid having >=3 carboxylic groups in one molecule to be added, includes citric acid, iso-citric acid, 1,2,3-tri-carboxy-1,3-di-hydroxy propane, and the use of citric acid is preferable from the viewpoint of the price.
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公开(公告)号：JPH0947840A
公开(公告)日：1997-02-18
申请号：JP16192295
申请日：1995-06-28
Applicant: KAO CORP
Inventor： NAKAI SHIGEO , KATO MASAYUKI , KIUCHI KAZUHIKO
Abstract: PURPOSE: To use artificial mullite molding sand having a variety of excellent chorcteristie, capable of obtaining excellent mold strength even in the long period of time to be used. CONSTITUTION: This mold forming composition is used in the case of forming a mold with a binder bond, composed of artificial mullite molding sand and an acid curing fran resin, and a curing agent. And the mold forming composition, which is required to contain a phosphoric acid and an organic sulfonic acid as its essential constituent and which is composed of, by wt., 10-85% phosphoric acid and 5-70% organic sulfonic acid, is obtained.
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公开(公告)号：JPH08117922A
公开(公告)日：1996-05-14
申请号：JP28741694
申请日：1994-10-26
Applicant: KAO CORP
Inventor： NAKAI SHIGEO , KIUCHI KAZUHIKO , SAWA MASUO , KATO MASAYUKI
Abstract: PURPOSE: To shorten the curing time of a caking agent when a mold main body is formed by using a mixture of orthophosphoric acid and a specified phosphoric acid-base compd. as the curing agent and preventing lowering of mold strength. CONSTITUTION: A mold forming curing agent composition contg. 20-85wt.% orthophosphoric acid and 5-50% phosphoric acid-base compd. shown by the formula as the effective components is prepared, where the total of the acid and compd. is controlled to
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公开(公告)号：JPH07185732A
公开(公告)日：1995-07-25
申请号：JP35217393
申请日：1993-12-27
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , SAWA MASUO , NAKAI SHIGEO , KATO MASAYUKI
IPC: B22C1/22 , C08K5/15 , C08K5/1535 , C08L101/00 , C09J161/06
Abstract: PURPOSE:To lessen generation of harmful gases and to prevent degradation of a working environment by specifying weight ratios of the phosphorus atoms and sulfur atoms in a hardener compsn. CONSTITUTION:A binder compsn. and the hardener compsn. are used in order to mold the casting mold. An acid curing resin and the curing accelerator expressed by formula I are incorporated into the binder compsn. A phosphorus atom-contg. compd. and sulfur atom-contg. compd. are incorporated into the hardener compsn. The content of the hardening accelerator in the binder compsn. is specified to 0.5 to 63.0wt.%. The weight ratios of the phosphorus atoms and sulfur atoms expressed by [sulfur atom content/(phosphorus atom content + sulfur atom content)] in the hardener compsn. are specified to 0.01 to 0.7. As a result, accumulation of a large amt. of phosphorus in reconditioned sand is prevented at the time of repetitively using the sand for molding the casting molds.
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Patent Agency Ranking
公开(公告)号：JPH06297072A
公开(公告)日：1994-10-25
申请号：JP35217493
申请日：1993-12-27
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , NAKAI SHIGEO , SAKAI MITSURU , NOMURA SHINYA
IPC: B22C1/00 , B22C1/22 , C08K5/15 , C08K5/1535 , C08L61/00 , C08L61/04 , C08L61/20 , C08L101/00
Abstract: PURPOSE:To increase a curing speed and to obtain the casting mold having high initial strength by incorporating a specific ratio of a hardening accelerator consisting of one or >=2 kinds of the compds. expressed by formula into a binder compsn. CONSTITUTION:This binder compsn. for production of the casting mold consists of a thermosetting resin and the hardening accelerator as essential components. The hardening accelerator consists of one or >=2 kinds of the compds. expressed by the formula I which are incorporated therein at 0.5 to 63.0wt.%. The hardening accelerator is formed of 2,5-bishydroxy methylfurane, 2,5-bismethoxy methylfurane and 2,5-bisethoxy methylfurane alone or in combination. As a result, there is no need for increasing the amt. of the harclener or using hardeners of a sulfonic acid system, etc., having high acid intensity, etc., and, therefore, the production of the casting mold is executed in good working environment.
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公开(公告)号：JPH0523786A
公开(公告)日：1993-02-02
申请号：JP18095691
申请日：1991-07-22
Applicant: KAO CORP
Inventor： YOSHIDA AKIRA , FUNADA HITOSHI , KIUCHI KAZUHIKO , NAKAI SHIGEO
Abstract: PURPOSE:To provide the binder compsn. for a curing mold used in a molding method for self-curing and gas-curing molds. CONSTITUTION:This binder compsn. for production of the ester-curing mold is formed by incorporating a water-soluble phenolic resin which is produced by effecting reaction in an acidic region by using a tervalent or higher valency metallic element compd. in a stage for condensing phenols and aldehydes and effecting the reaction with an alkaline catalyst in an alkaline region in the stage before the above-mentioned stage and/or the stage thereafter into this compsn. This process for production of the casting mold consists in using the above-mentioned binder compsn. The strength of the casting molds formed from reclined sand is greatly improved by using the above-mentioned binder compsn. and process for production of the casting mold in the process for production of the sand mold for casting for molding a refractory granular material.
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公开(公告)号：JPH0523785A
公开(公告)日：1993-02-02
申请号：JP18095591
申请日：1991-07-22
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , FUNADA HITOSHI , YOSHIDA AKIRA , NAKAI SHIGEO
Abstract: PURPOSE:To provide the resin compsn. for a curing mold used in a molding method for self-curing and gas-curing molds and the process for production of a casting sand mold. CONSTITUTION:This resin compsn. for the casting mold is the resin compsn. which is used in the process for production of the casting mold for curing a refractory granular material by a water-soluble phenolic resin which is obtd. by modifying a novolak resin obtd. by bringing phenols and aldehydes into reaction with an acidic material as a catalyst to the water-soluble resin with the hydroxide of an excess alkaline metal and org. ester and contains metallic elements of groups IB to VIII of periodic table. This process for production of the sand mold for casting consists in using the above-mentioned resin compsn. The strength of the casting mold formed from a reclained refractory granular material is greatly improved by using the above-mentioned resin compsn. and process for production of the casting mold.
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公开(公告)号：JPH0523779A
公开(公告)日：1993-02-02
申请号：JP18095091
申请日：1991-07-22
Applicant: KAO CORP
Inventor： YOSHIDA AKIRA , KIYOUCHIKA NAOKI , KIUCHI KAZUHIKO , MANBA AKIO , NAKAI SHIGEO
IPC: B22C1/22
Abstract: PURPOSE:To produce a defectless casting by using the reclamation sand intended to be recycled as a refractory granular material in the process for production of the casting sand mold which molds the refractory granular material by using a water-soluble phenolic resin as a binder and org. ester as a hardener. CONSTITUTION:The water-soluble phenolic resin produced by effecting reaction in an acidic region by using a bivalent metal element compd. in a stage for condensing phenols and aldehydes and effecting the reaction with an alkaline metallic catalyst in an alkaline region in the stage before the above-mentioned stage and/or the stage thereafter is used as the binder. The casting sand mold for molding the refractory granular material is produced by using org. ester as a hardener. The reclamation sand or reconditioned sand intended to be recycled is used as the refractory granular material. The casting mold having high strength is obtd. in this way and since the amt. of the binder to be used is decreased, the recovery and regeneration of the molding sand are facilitated. Since the amt. of the gases to be generated can be decreased, the defectless casting can be produced.
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公开(公告)号：JPH04371340A
公开(公告)日：1992-12-24
申请号：JP14450691
申请日：1991-06-17
Applicant: KAO CORP
Inventor： SAKAI MITSURU , KIUCHI KAZUHIKO , NAKAI SHIGEO
IPC: B22C1/02 , C07C409/00
Abstract: PURPOSE:To improve a collapsing property and to eliminate the need for a heat treatment in a knock-out stage as well as to decrease the number of stages by using the specific compsn. for the sand core to be applied to an undercut part. CONSTITUTION:This peroxide compsn. is the peroxide compsn. for the sand mold for high-pressure casting used at the time of producing the sand core to be applied to the undercut part by blowing gaseous or aerosol sulfur dioxide into a sand mold molded by adding and kneading an acid curing resin and the peroxide compsn. to and with refractory granular aggregate in die casting for casting a light alloy under several 10 to several 100kg/cm pressure and consists of a ketone peroxide and a dilution stabilizer. This dilution stabilizer contains 30 to 100wt.% at least one kind of the methyl esters expressed by the general formula I or general formula II. The formula I... R1COOCH3, the formula II... R2(COOCH3)20.
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