公开(公告)号：JPH0857576A

公开(公告)日：1996-03-05

申请号：JP21810194

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 binder-hardener compsn. for producing a casting mold which makes it possible to obtain a casting mold which is high in curing rate, less generates harmful gases and has high strength. 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) is 5.0 to 60.0. The water content in the binder compsn. is

公开(公告)号：JPH07204775A

公开(公告)日：1995-08-08

申请号：JP1486994

申请日：1994-01-12

Applicant: KAO CORP

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

IPC: B22C1/10 ,  B22C1/22 ,  B22C5/04 ,  B22C9/02

Abstract: PURPOSE:To provide a hardener compsn. for producing casting molds with which production of casting molds having high strength is possible. CONSTITUTION:A reformed wet phosphoric acid liquid is incorporated in this hardener compsn. for producing the casting molds. This reformed wet phosphoric acid liquid is formed by reforming a wet phosphoric acid liquid for industrial purposes produced by a wet phosphoric acid production process. The reformed wet phosphoric acid liquid is reformed in terms of concn. of P2O5 and oxidation reduction potential and is so reformed that the concn. of the P2O5 attains 40 to 65wt.% and the oxidation reduction potential attains 600 to 1250mV. The reformed wet phosphoric acid liquid is so reformed that the content of arsenic attains

公开(公告)号：JPH05237587A

公开(公告)日：1993-09-17

申请号：JP33313292

申请日：1992-12-14

Applicant: KAO CORP

Inventor： TAKEYAMA ISAO ,  KIUCHI KAZUHIKO ,  NAKAI SHIGEO ,  TANAKA TSUTOMU ,  KATO MASAYUKI ,  MIZUNO WATARU

IPC: B22C1/10 ,  B22C1/22 ,  B22C9/02

Abstract: PURPOSE:To improve a working environment, to drastically lessen the generation of blowhole defects in a resulted casting and to obtain sound casting. CONSTITUTION:The sand compsn. for forming a casting mold, the process for production of the casting mold and the hardener compsn. for forming the casting mold in which the nitrogen content, more preferably nitrogen content and phosphorus content in the formed casting mold and further preferably, the nitrogen content, phosphorus content and sulfur content therein are in a specified range and the weight ratio expressed by the sulfur content/(phosphorus content + sulfur content) in regenerated sand and hardener are in a specified range at the time of producing the casting mold by using the regenerated sand as an essential component and curing an acid curing furan resin.

公开(公告)号：JPH04371344A

公开(公告)日：1992-12-24

申请号：JP14873891

申请日：1991-06-20

Applicant: KAO CORP

Inventor： SAKAI MITSURU ,  KIUCHI KAZUHIKO ,  NAKAI SHIGEO

IPC: B22C1/22 ,  B22D17/22

Abstract: PURPOSE:To obtain the better collapsing property, etc., eliminate the need for the execution of a heat treatment in a knock-out stage and to eliminate the distortions of a casting mold as well as to improve the dimensional defects of a casting by deformation and working environment by using the above binder compsn. at the time of producing the sand core to be applied to an undercut part in die casting for casting a light alloy under a high pressure. CONSTITUTION:This binder compsn. for the sand core for high-pressure casting is the binder compsn. which consists essentially of furfuryl alcohol and is used at the time of producing the sand core to be applied to the undercut part in die casting for casting the light alloy under several 10 to several 100kg/cm pressure by blowing gaseous or aerosol sulfur dioxide into a sand mold formed by adding and mixing the binder compsn. and peroxide compsn. to and with refractory aggregate and molding the mixture. The furfuryl alcohol exists or remains in the above-mentioned binder compsn.

公开(公告)号：JPH04118144A

公开(公告)日：1992-04-20

申请号：JP23640890

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 molding sand having the compsn. containing the specific ratio of phenol compound monomer in water-soluble phenol resin. CONSTITUTION:By using the binder composition for organic ester curing type molding sand having the compsn. containing the water-soluble phenol resin and one or more kinds of phenol compound monomer at 5-40wt.% to the solid in the above phenol resin as the essential components, the mold is molded. Then, the water-soluble phenol resin is the resin, which can be cured with the organic ester, e.g. phenol resin obtd. by reaction of phenol kind including phenol, cresol and the other substitution phenol and mixture of formaldehyde, acetaldehyde, etc., and aldehyde. Further, the phenol compound monomer is e.g. compound of phenol, cresol, resorciner, xylenol, etc.

公开(公告)号：JPH0352743A

公开(公告)日：1991-03-06

申请号：JP18918889

申请日：1989-07-21

Applicant: KAO CORP

Inventor： NAKAI SHIGEO ,  MURAYAMA HAJIME ,  FUNADA HITOSHI

IPC: B22C1/22

Abstract: PURPOSE:To improve strength in a mold at initial stage by blending refractory granular aggregate, acid hardening resin, hardening agent, silica series inoganic binder and silane coupling agent having amino group or ureido group in molecular at the specific ratios. CONSTITUTION:By blending 0.5-5wt. parts the acid hardening resin composed of at least >=1 kind among furan resin, phenol resin or resin denaturating or reacting them, 0.05-1wt. parts the hardening agent containing organic sulfonic acid and weak basic salt as the essential component, 0.02-2wt. parts silica content in the silica series inorganic binder and 0.0001-0.5 wt. parts the silane coupling agent having the amino group or the ureido group in molecular, as binder for mold per 100 wt. parts the refractory granular aggregate, heating hardening type composition for mold is obtd.