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.

公开(公告)号：JPH0899148A

公开(公告)日：1996-04-16

申请号：JP25946394

申请日：1994-09-28

Applicant: KAO CORP

Inventor： NOMURA SHINYA ,  SAWA MASUO ,  OKAMOTO MASAKATSU

IPC: B22C1/10 ,  C07C31/04 ,  C07C309/30

Abstract: PURPOSE: To obtain a hardener compsn. for producing casting molds which hardly precipitate crystals even at a low temp. and does not cause the danger of inflammation, etc. CONSTITUTION: This hardener compsn. for producing casting molds contains 10 to 45wt.% alkyl (C1 to C4 ) substd. arom. sulfonic acid, 4 to 12wt.% lower (C1 to C4 ) alcohol, an inorg. acid and water. The content ratio (ywt.%) of the ethyl benzene sulfonic acid in the alkyl (C1 to C4 ) substd. arom. sulfonic acid, satisfies equation I [y -6.9891x --3.9963x +16.572x+84.773] and equation II [y>-21.622x +112.48x --205.5x +147.61x-5.1287]. In the formula I and the formula II, x denotes the inorg. acid (wt.%)/water (wt.%) in the hardener compsn. for producing casting molds and the value thereof is within a range of 0.6 0.

公开(公告)号：JPH081272A

公开(公告)日：1996-01-09

申请号：JP16279894

申请日：1994-06-20

Applicant: KAO CORP

Inventor： NOMURA SHINYA ,  NISHIO HIDEYUKI

IPC: B22C3/00 ,  B22C5/04 ,  C08L83/04

Abstract: PURPOSE:To provide a molding sand adhesion preventive compsn. which securely adheres to the inside surfaces of kneading apparatus and is capable of preventing adhesion of molding sand to the inside surfaces of these apparatus. CONSTITUTION:This molding sand adhesion preventive compsn. contains a silicone oil, such as dimethyl silicone oil, at a ratio of 5 to 100wt.%. Silicone oil films adhere securely to the inside surfaces of the apparatus when a compsn. contg. 5 to 100 pts.wt. silicone oil and 1 to 95 pts.wt. org. solvent, such as toluene, is prepd. and is applied on the inside surfaces of the apparatus and when the org. solvent is evaporated. At this time, the adhesive effect of an org. high- polymer compd., such as polystyrene, acts as well to further securely adhere the silicone oil films to the inside surfaces of the apparatus if the molding sand adhesion preventive compsn. further contg. 0.1 to 10 pts.wt. org. high- polymer compd. described above is prepd. and is applied on the inside surfaces of the apparatus.

公开(公告)号：JPH04105747A

公开(公告)日：1992-04-07

申请号：JP22219290

申请日：1990-08-23

Applicant: KAO CORP

Inventor： KIYOUCHIKA NAOKI ,  NOMURA SHINYA

IPC: B22C1/02

Abstract: PURPOSE:To reduce the development of acidic gas at the time of pouring a molten metal by constituting this additive for forming sand mold for casting with a metallic oxide having the specific rain diameter and content of the metallic oxide. CONSTITUTION:The additive for forming the sand mold for casting composed of the metallic oxide having 10-100mum mean grain diameter and

公开(公告)号：JPH0352742A

公开(公告)日：1991-03-06

申请号：JP18859389

申请日：1989-07-20

Applicant: KAO CORP

Inventor： SAWA MASUO ,  NOMURA SHINYA

IPC: B22C1/22

Abstract: PURPOSE:To prevent the development of casting defect and to improve the casting quality by acting acid hardening resin and acidic hardening agent to refractory aggregate and manufacturing a mold. CONSTITUTION:Into molding sand obtd. by adding and kneading furan resin, resol type phenol resin or the acid hardening resin prepared by mixing or co- condensing these, the acidic hardening agent and solvent having (A-1)-(A+1) solubility parameter (wherein, A shows the solubility parameter in synthetic resin foaming body) as binder for casting to the refractory aggregate, the synthetic resin foaming body-made pattern is embedded and after forming the mold, the pattern is taken off from the mold.