CN104804162A - Hot core box resin for casting and preparation method thereof - Google Patents

Hot core box resin for casting and preparation method thereof Download PDF

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Publication number
CN104804162A
CN104804162A CN201510238720.6A CN201510238720A CN104804162A CN 104804162 A CN104804162 A CN 104804162A CN 201510238720 A CN201510238720 A CN 201510238720A CN 104804162 A CN104804162 A CN 104804162A
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China
Prior art keywords
percent
added
core box
hot core
formaldehyde
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Pending
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CN201510238720.6A
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Chinese (zh)
Inventor
吴景泉
殷涛
艾家贵
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Appearance Of City River Wuhu Electromechanical Technology Co Ltd
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Appearance Of City River Wuhu Electromechanical Technology Co Ltd
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Priority to CN201510238720.6A priority Critical patent/CN104804162A/en
Publication of CN104804162A publication Critical patent/CN104804162A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a hot core box resin for casting and a preparation method thereof. The hot core box resin for casting comprises the following raw materials by mass percentage: 91-93 percent of furfuryl alcohol, 0.1-0.2 percent of solid formaldehyde, 2.0-3.0 percent of urea, 4.3-5.2 percent of monohydric alcohol and 0.6 percent of coupling agent. During production, firstly the furfuryl alcohol and the monohydric alcohol are added into a reaction kettle, and the PH value is controlled to be 10.0-11.0; then the uniformly mixed urea and solid formaldehyde are added, steam is added for increasing temperature, steam inlet speed is kept to control the temperature to be increased to approximate 87 DEC G within one hour and the heat is preserved for two hours; then the temperature is decreased to approximate 60 DEG C, the PH value is regulated to 5.5-6.5 by using acidic catalyst, the steam is added again to increase the temperature to approximate 90 DEG C, the heat is preserved for one hour, then the temperature is naturally decreased to be below 55 DEG C and the coupling is added and uniformly mixed to obtain finished products. Since the solid formaldehyde is used for replacing liquid formaldehyde, the total amount of the solid formaldehyde is reduced by more than 50 percent and the amount of free formaldehyde is reduced; the hot core box resin has the advantages of low viscosity, easiness in sand mixing and good mold sand mobility; the solidifying speed is fast, the strength is high and the casting quality is favorably improved.

Description

A kind of hot core box for casting resin and preparation method thereof
Technical field
The invention belongs to a kind of hot core box resin and preparation method thereof, particularly relate to a kind of hot core box for casting resin and preparation method thereof.
Background technology
The general smell of current hot core box resin is comparatively large, and mainly owing to containing a large amount of free formaldehydes in resin, contaminate environment, infringement workman is healthy, and in the process of use, hot core box resin gas forming amount is large, and raising rate is fast, easily produces casting flaw; Also there is core resistance to water soak poor, intensity is unstable.
Summary of the invention
The object of this invention is to provide a kind of use procedure Free-formaldehyde content low, hot core box for casting resin that intensity is high, viscosity is low and preparation method thereof.Object of the present invention is achieved through the following technical solutions: this hot core box for casting resin, its raw material and mass percentage are: furfuryl alcohol 91-93%, solid formaldehyde 0.1-0.2%, urea 2.0-3.0%, monohydroxy-alcohol 4.3-5.2% and coupling agent fixed amount are 0.6%, first furfuryl alcohol, monohydroxy-alcohol are added in reactor in production process, pH value is controlled at 10.0-11.0; Then add the urea and solid formaldehyde that mix, add steam and heat up, keep intake velocity, control in 1 hour, be warming up to about 87 DEG C and carry out insulation 2 hours; Be cooled to about 60 DEG C again, regulate pH value to 5.5-6.5 with an acidic catalyst, add steam again and be warming up to about 90 DEG C, be incubated Temperature fall less than 55 DEG C after 1 hour and add after coupling agent stirs and obtain finished product.
The present invention adopts solid formaldehyde to replace liquid formaldehyde, and the total amount of solid formaldehyde reduces more than 50%, reduces formaldehyde free amount; And there is the low easy mulling of viscosity, sand fluidity is good; Quick solidifying, intensity are high, favourable raising casting quality.
Embodiment
The present invention is described in further detail in conjunction with the embodiments.
This its raw material of hot core box for casting resin and mass percentage are: furfuryl alcohol 91-93%, solid formaldehyde 0.1-0.2%, urea 2.0-3.0%, monohydroxy-alcohol 4.3-5.2% and coupling agent fixed amount are 0.6%.
First 93kg furfuryl alcohol, 4.3kg monohydroxy-alcohol are added in reactor in production process, pH value is controlled at 10.0-11.0; Then add the 2kg urea and 0.2kg solid formaldehyde that mix, add steam and heat up, keep intake velocity, control in 1 hour, be warming up to about 87 DEG C and carry out insulation 2 hours; Be cooled to about 60 DEG C again, regulate pH value to 5.5-6.5 with an acidic catalyst, add steam again and be warming up to about 90 DEG C, be incubated Temperature fall less than 55 DEG C after 1 hour and add after 0.6kg coupling agent stirs and obtain finished product.

Claims (2)

1. a hot core box for casting resin, is characterized in that;
Its raw material and mass percentage are: furfuryl alcohol 91-93%, solid formaldehyde 0.1-0.2%, urea 2.0-3.0%, monohydroxy-alcohol 4.3-5.2% and coupling agent fixed amount are 0.6%.
2. the preparation method of hot core box for casting resin according to claim 1, is characterized in that:
First furfuryl alcohol, monohydroxy-alcohol are added in reactor, pH value is controlled at 10.0-11.0; Then add the urea and solid formaldehyde that mix, add steam and heat up, keep intake velocity, control in 1 hour, be warming up to about 87 DEG C and carry out insulation 2 hours; Be cooled to about 60 DEG C again, regulate pH value to 5.5-6.5 with an acidic catalyst, add steam again and be warming up to about 90 DEG C, be incubated Temperature fall less than 55 DEG C after 1 hour and add after coupling agent stirs and obtain finished product.
CN201510238720.6A 2015-05-12 2015-05-12 Hot core box resin for casting and preparation method thereof Pending CN104804162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510238720.6A CN104804162A (en) 2015-05-12 2015-05-12 Hot core box resin for casting and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510238720.6A CN104804162A (en) 2015-05-12 2015-05-12 Hot core box resin for casting and preparation method thereof

Publications (1)

Publication Number Publication Date
CN104804162A true CN104804162A (en) 2015-07-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510238720.6A Pending CN104804162A (en) 2015-05-12 2015-05-12 Hot core box resin for casting and preparation method thereof

Country Status (1)

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CN (1) CN104804162A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106008871A (en) * 2016-06-27 2016-10-12 霍山县忠福硅溶胶有限公司 Furan resin and preparation method thereof
CN106977677A (en) * 2017-04-07 2017-07-25 保定永强合成材料有限公司 A kind of production technology of novel environment friendly furane resins

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1155856A (en) * 1994-08-19 1997-07-30 花王株式会社 Binder composition for mold production and process for producing mold
CN104193936A (en) * 2014-08-29 2014-12-10 玉林市兰科铸造材料有限公司 Hot box resin for casting and preparation method of hot box resin for casting
CN104220504A (en) * 2012-03-23 2014-12-17 花王株式会社 Binder composition for making foundry molds

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1155856A (en) * 1994-08-19 1997-07-30 花王株式会社 Binder composition for mold production and process for producing mold
CN104220504A (en) * 2012-03-23 2014-12-17 花王株式会社 Binder composition for making foundry molds
CN104193936A (en) * 2014-08-29 2014-12-10 玉林市兰科铸造材料有限公司 Hot box resin for casting and preparation method of hot box resin for casting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106008871A (en) * 2016-06-27 2016-10-12 霍山县忠福硅溶胶有限公司 Furan resin and preparation method thereof
CN106008871B (en) * 2016-06-27 2018-07-31 霍山县忠福硅溶胶有限公司 A kind of furane resins and preparation method thereof
CN106977677A (en) * 2017-04-07 2017-07-25 保定永强合成材料有限公司 A kind of production technology of novel environment friendly furane resins

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Address after: 241206 Anhui city of Wuhu province Fanchang Suncun Town Industrial Park in Wuhu city of Sichuan Science & Technology Co Ltd

Applicant after: WUHU RONGCHUAN ELECTROMECHANICAL TECHNOLOGY CO., LTD.

Address before: 241206 Anhui city of Wuhu province Fanchang Suncun Town Industrial Park in Wuhu city of Sichuan Science & Technology Co Ltd

Applicant before: Appearance of the city river, Wuhu Electromechanical Technology Co., Ltd

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Application publication date: 20150729

WD01 Invention patent application deemed withdrawn after publication