JPS5731439A - Binder for molding sand - Google Patents

Binder for molding sand

Info

Publication number
JPS5731439A
JPS5731439A JP10759580A JP10759580A JPS5731439A JP S5731439 A JPS5731439 A JP S5731439A JP 10759580 A JP10759580 A JP 10759580A JP 10759580 A JP10759580 A JP 10759580A JP S5731439 A JPS5731439 A JP S5731439A
Authority
JP
Japan
Prior art keywords
starch
binder
added
esterified
molding sand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10759580A
Other languages
Japanese (ja)
Inventor
Shunichi Matsuzaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
Original Assignee
Sintokogio Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sintokogio Ltd filed Critical Sintokogio Ltd
Priority to JP10759580A priority Critical patent/JPS5731439A/en
Publication of JPS5731439A publication Critical patent/JPS5731439A/en
Pending legal-status Critical Current

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  • Mold Materials And Core Materials (AREA)

Abstract

PURPOSE: To provide a binder which decreases the amount of addition of water content and reduces the time for drying and hardening by adding and mixing a high concn. of a weak acid to and with starch then adding an alkali thereby esterifying the starch at a high degree of substitution.
CONSTITUTION: After a high concn. of a weak acid (monocholoacetic acid) permitting esterification reaction is added to starting material starch, an alkali (NaOH) is added thereto, whereby the esterified starch, (carboxymethyl starch) wherein the starting material starch is esterified at a high degree of substitution is obtained. This esterified starch turns to glue with cold water, and when added with a small amount of water content, it exhibits high binding power and is therefore suitable as a binder for molding sand.
COPYRIGHT: (C)1982,JPO&Japio
JP10759580A 1980-08-04 1980-08-04 Binder for molding sand Pending JPS5731439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10759580A JPS5731439A (en) 1980-08-04 1980-08-04 Binder for molding sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10759580A JPS5731439A (en) 1980-08-04 1980-08-04 Binder for molding sand

Publications (1)

Publication Number Publication Date
JPS5731439A true JPS5731439A (en) 1982-02-19

Family

ID=14463135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10759580A Pending JPS5731439A (en) 1980-08-04 1980-08-04 Binder for molding sand

Country Status (1)

Country Link
JP (1) JPS5731439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3015188A1 (en) 2014-10-30 2016-05-04 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Moulding sand and a method of curing of moulding sand

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3015188A1 (en) 2014-10-30 2016-05-04 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Moulding sand and a method of curing of moulding sand

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