公开(公告)号：JPH04327336A

公开(公告)日：1992-11-16

申请号：JP9521991

申请日：1991-04-25

Applicant: KAO CORP

Inventor： FUNADA HITOSHI ,  KIUCHI KAZUHIKO ,  NAKAI SHIGEO

IPC: B22C1/22

Abstract: PURPOSE:To reduce strain in a metallic pattern and mold and to improve ther mal working environment by coating the surface of refractory aggregate with solid product which is obtained by reacting alpha,beta-unsaturated dibasic acid, etc., with a specific furan compound, thereby lowing curing temperature. CONSTITUTION:With the furan compound as shown in the formula I, alpha,beta-unsaturated dibasic acid or acid anhydride is reacted to obtain the produced material. If the produced material is solid state at room temp., this is used as it is, and if not, this is solidified by using modifier. The produced material is added to heated molding sand with finely pulverized or bulky state, or added to molding sand after being dissolved by heating or in solvent, thereby sticking the material on the surface of the refractory aggregate. As the refractory aggregate coating the composition for manufacturing the mold in such way, has low curing temp., the reduced strain in the metallic mold and the mold, and the improved thermal working environment. Further, as the curing agent is unnecessary, the casting defect due to nitrogen gas is not developed.

公开(公告)号：JPH04123836A

公开(公告)日：1992-04-23

申请号：JP24072590

申请日：1990-09-11

Applicant: KAO CORP

Inventor： MURAYAMA HAJIME ,  MAEDA MINORU ,  NAKAI SHIGEO

IPC: B22C1/22

Abstract: PURPOSE:To drastically improve the smoothness of casting surface by specifying the composition of acid-setting resin used for binder for molding sand. CONSTITUTION:The binder composition for molding sand is composed of the acid-setting resin and strong acidic salt and weak basic salt and used at the time of forming a mold by kneading this with refractoriness granular aggregate and heat-setting this, and having the following characteristic composition in the acid-setting resin (a) 20-35wt% resol type phenol resin, (b) 40-65wt% furfuryl alcohol or furan resin, (c) 15-30wt% keton resin composed of at least one kind of cyclohexanone, cyclopentanone or aromatic keton and aldehyde and 1:1-1:3mol ratio of the keton to the aldehyde.

公开(公告)号：JPH04118148A

公开(公告)日：1992-04-20

申请号：JP23641290

申请日：1990-09-05

Applicant: KAO CORP

Inventor： KIUCHI KAZUHIKO ,  FUNADA HITOSHI ,  KURA AKIRA ,  NAKAI SHIGEO

IPC: B22C1/22

Abstract: PURPOSE:To drastically improve mold strength by using a binder composition for organic ester curing type molding sand having compsn. containing one or more kinds of the specific ester kind in water-soluble phenol resin. CONSTITUTION:The binder composition for organic ester curing type molding sand has the composition containing the water-soluble phenol resin and one or more kinds of ester kind as the essential component and having at least one of aromatic ring in the molecule or one or more oxygen atoms in five or six rings forming these ethyer kind. Concretely, anisole, phenetole, butyl phenylether, etc., is used.

公开(公告)号：JPH03257007A

公开(公告)日：1991-11-15

申请号：JP5613790

申请日：1990-03-06

Applicant: KAO CORP

Inventor： NAKAI SHIGEO ,  FUNADA HITOSHI

IPC: C01B31/02 ,  C04B41/85

Abstract: PURPOSE:To simplify the forming process by heating a refractory grain coated with an org. compd. capable of forming a pyrolytic carbon film to a specified temp. along with a substrate. CONSTITUTION:The refractory grain of Al2O3, SiO2, etc., having 10mum to 5mm diameter is mixed with an org. compd. capable of forming a pyrolytic carbon film, e.g. an aromatic monomer such as toluene, synthetic resin such is phenolic resin and polyamide resin and natural resin such as rosin, and the mixture is placed in a crucible which is then closed with a lid. The crucible is put in a heating furnace, the mixture is heated in the furnace to about 600-1500 deg.C in an inert gas atmosphere of N2, etc., roasted for a specified time, then cooled to room temp. and discharged, and the refractory grain coated with a pyrolytic carbon film is obtained.

公开(公告)号：JP2002165871A

公开(公告)日：2002-06-11

申请号：JP2000367885

申请日：2000-12-04

Applicant: KAO CORP

Inventor： ISHIDA HIROHIKO ,  NAKAI SHIGEO

IPC: A61L9/01

Abstract: PROBLEM TO BE SOLVED: To provide a deodorant composition which contains water and a polyvalent alcohol and is used to eliminate the uncomfortable odors generated in factories accompanied by heating process steps. SOLUTION: This deodorant composition is capable of relieving the uncomfortable odors generated in the factories accompanied by the heating process steps relating to clothes, textile products, spaces, etc., without allowing the small of the composition to remain. In addition, the deodorant effect thereof persists.

公开(公告)号：JP2000317578A

公开(公告)日：2000-11-21

申请号：JP13011199

申请日：1999-05-11

Applicant: KAO CORP

Inventor： KATO MASAYUKI ,  NAKAI SHIGEO

IPC: B22D7/10 ,  B22C1/00 ,  B22C9/08

Abstract: PROBLEM TO BE SOLVED: To obtain heat generating element, with which the heat generating material for casting having high strength can be produced without developing any trouble caused by mutual reaction between binder and the heat generating component. SOLUTION: The heat generating element is combined of heat generating composition composed of an easily oxidizing material and an oxidant and if necessary, further, an oxidizing promotor with an organic coating. The organic coating is a capsule of polymer compound. This heat generating element is used for manufacturing the heat generating material for casting together with refractory granular material and binder and desirably, integrating with a mold. In this way, the heat generating efficiency can be improved, and since this element can simultaneously be molded with mold, the absorption of the moisture at the storing time can be restrained, too.

公开(公告)号：JP2000246391A

公开(公告)日：2000-09-12

申请号：JP5524299

申请日：1999-03-03

Applicant: KAO CORP

Inventor： NAKAI SHIGEO ,  KATO MASAYUKI

IPC: B22C1/22

Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method for obtaining a caking additive with fast hardening velocity by reacting furfuryl alcohol and folmaldehyde. SOLUTION: In this manufacturing method, folmaldehyde and furfuryl alcohol are reacted while having an acidic catalyst whose acid dissociative constant (pKa) in one step is 2.5-4.6 at 25 deg.C, where folmaldehyde: furfuryl alcohol = 0.2-2.0:1 (mole ratio) will be satisfied. Also, acidic catalyst and furfuryl alcohol are reacted at acidic catalyst: furfuryl alcohol = 0.01-0.1:1 (mole ratio).

公开(公告)号：JPH1052732A

公开(公告)日：1998-02-24

申请号：JP20839496

申请日：1996-08-07

Applicant: KAO CORP

Inventor： NAKAI SHIGEO

IPC: B22C1/10 ,  B22C1/16

Abstract: PROBLEM TO BE SOLVED: To provide a hardening agent composition for forming a mold which can suitably use at the time of manufacturing a self-curing mold. SOLUTION: This composition is the hardening agent composition using at the time of manufacturing a sand mold for casting by mixing a binder containing a refractoriness granular material and acid hardening resin and a hardening agent composition and successively, hardening the binder, and contains salfuric ester shown with a formula R OSO3 R (in the formula, R and R show H or aliphatic hydrocarbon group having and R is not H.

公开(公告)号：JPH08174139A

公开(公告)日：1996-07-09

申请号：JP32479794

申请日：1994-12-27

Applicant: KAO CORP

Inventor： NAKAI SHIGEO ,  KATO MASAYUKI ,  SAWA MASUO ,  KIUCHI KAZUHIKO

IPC: B22C3/00

Abstract: PURPOSE: To prevent the degradation in the strength of a casting mold at the time of igniting and drying by incorporating a solvent having specific low polarity into an alcoholic mold coat compsn. to be applied on the surface of the casting mold formed of an acid curing binder, acidic hardener and refractories. CONSTITUTION: The org. solvent having a dissolution parameter of 6.5 to 11.0 and 3 to 10C is incorporated at 2 to 80wt. into this coating agent compsn. The acid hardener is one or >=2 kinds selected from an orthophosphoric acid, sulfuric acid and xylene sulfonic acid. Further, the dissolution parameter of the org. solvent is preferably 7.0 to 10.0 and more preferably 7.0 to 9.0. The carbon atoms of the org. solvent are preferably 5 to 7. In either case the content of the org. solvent is specified to 5 to 50wt.%.

公开(公告)号：JPH0857577A

公开(公告)日：1996-03-05

申请号：JP21810294

申请日：1994-08-19

Applicant: KAO CORP

Inventor： KIUCHI KAZUHIKO ,  KATO MASAYUKI ,  SAWA MASUO ,  NAKAI SHIGEO

IPC: B22C1/10 ,  B22C1/22 ,  C08K5/15 ,  C08K5/1535 ,  C08L45/00

Abstract: PURPOSE: To provide a binder compsn. for production of a casting mold having a high curing rate. CONSTITUTION: This binder compsn. is formed by polycondensation of furfuryl alcohol, urea and aldehydes as essential components. The difference [A-B] between the furfuryl alcohol weight % (A) charged in the binder compsn. and unreacted furfuryl alcohol weight % (B) 5.0 to 60.0. Effect accelerators, such as 2,5-bishydroxy methyl furan and 2,5-bismethoxy methyl furan, are incorporated at 0.5 to 63.0wt.% into the binder compsn. Further, the water content in the binder compsn. is preferably