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CN1043314C - Modified soluble organic adhesive for casting - Google Patents

Modified soluble organic adhesive for casting Download PDF

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Publication number
CN1043314C
CN1043314C CN95103925A CN95103925A CN1043314C CN 1043314 C CN1043314 C CN 1043314C CN 95103925 A CN95103925 A CN 95103925A CN 95103925 A CN95103925 A CN 95103925A CN 1043314 C CN1043314 C CN 1043314C
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CN
China
Prior art keywords
acid
casting
alkali metal
soluble organic
vegetable oil
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Expired - Fee Related
Application number
CN95103925A
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Chinese (zh)
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CN1133214A (en
Inventor
徐正达
肖波
朱炎久
饶亲民
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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Priority to CN95103925A priority Critical patent/CN1043314C/en
Publication of CN1133214A publication Critical patent/CN1133214A/en
Application granted granted Critical
Publication of CN1043314C publication Critical patent/CN1043314C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

本发明提供了一种铸造用改性水溶性有机粘结剂的制造方法,它是由有机酸与植物油在引发剂作用下进行共聚反应,然后用碱金属氢氧化物溶液中和而成。采用该方法生产的有机粘结剂的粘结强度、抗吸湿性能比改性前都有显著提高。The invention provides a manufacturing method of a modified water-soluble organic binder for casting, which is formed by carrying out a copolymerization reaction of an organic acid and vegetable oil under the action of an initiator, and then neutralizing it with an alkali metal hydroxide solution. The cohesive strength and moisture absorption resistance of the organic binder produced by the method are significantly improved compared with those before modification.

Description

The manufacture method of modified soluble organic adhesive for casting
The present invention relates to a kind of manufacture method of water-soluble organic binder for casting.
Existing CO 2Gas is urged hard water-soluble organic binder for casting (as polyvinyl alcohol, polyacrylate etc.), and adhesion strength is low, anti-moisture absorption property is poor, and particularly in the high-humidity climate environment, above-mentioned contradiction is more outstanding, thereby in use is very limited.
The objective of the invention is at deficiency of the prior art, produce a kind of available CO 2Acidic materials such as gas are urged hard casting vegetable oil soluble organic adhesive.The present invention is subjected to the peroxide initiator effect under given conditions and copolyreaction is taken place by aqueous solutions of organic acids and vegetable oil, with the alkali hydroxide soln neutralization, generates a kind of new soluble organic adhesive then.
The manufacture method of vegetable oil soluble organic adhesive is: add vegetable oil in the aqueous solutions of organic acids that has initator to exist, in temperature is that 80 °-130 ℃, pressure are to stir 2-6 hour under the 1-4atm condition, adding alkali metal hydroxide (aqueous solution) after copolyreaction is finished stirs, its percentage by weight is: organic acid 8~20%, vegetable oil 0.5~2.5%, initator 0.2~0.7%, alkali metal hydroxide 4~12%, Yu Weishui, organic acid are acrylic acid or are the mixture of acrylic acid and fumaric acid or maleic acid (acid anhydride).
Vegetable oil can be tung oil or modification rice bran oil or its mixture, and initator can be hydrogen peroxide or ammonium persulfate or benzoyl peroxide or two kinds mixture wherein, and alkali metal hydroxide is NaOH or potassium hydroxide or its mixture.
Because vegetable oil has participated in the organic acid copolyreaction, has changed hydrophilic tendency, therefore, the binding agent that the present invention produces is compared with the binding agent that does not add the vegetable oil making, and the intensity and the resistance to water soak of type (core) are significantly improved.
Embodiment:
In reactor, add 73% water, 15.6% acrylic acid, 0.4% hydrogen peroxide, 2% tung oil is heated to 102 ℃, and reaction is 4 hours under 102 ℃, the condition of 1atm.Slowly adding 8.5% NaOH (be made in advance 25% the aqueous solution) again stirs.
Experiment effect
Figure C9510392500041
Type (core) sand proportioning is: normal sand 100, binding agent 3.5, curing agent (mainly containing calcium hydroxide) 1.0.
Blow CO 2Gas solidifies: gassing time 10 seconds, CO 2Gas pressure 0.1MP a, 18 ℃ of temperature, humidity 70%.

Claims (2)

1, a kind of manufacture method of modified soluble organic adhesive for casting, it is characterized in that: in the aqueous solutions of organic acids that has initator to exist, add vegetable oil, in temperature is 80 ℃-130 ℃, pressure is to stir 2-6 hour under the 1-4atm condition, adding alkali metal hydroxide (aqueous solution) after copolyreaction is finished stirs, its percentage by weight is: organic acid 8~20%, vegetable oil 0.5~2.5%, initator 0.2~0.7%, alkali metal hydroxide 4~12%, Yu Weishui, organic acid are acrylic acid or are the mixture of acrylic acid and fumaric acid or maleic acid (acid anhydride).
2, the manufacture method of binding agent according to claim 1 is characterized in that: added alkali metal hydroxide is NaOH or potassium hydroxide or its mixture.
CN95103925A 1995-04-13 1995-04-13 Modified soluble organic adhesive for casting Expired - Fee Related CN1043314C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN95103925A CN1043314C (en) 1995-04-13 1995-04-13 Modified soluble organic adhesive for casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN95103925A CN1043314C (en) 1995-04-13 1995-04-13 Modified soluble organic adhesive for casting

Publications (2)

Publication Number Publication Date
CN1133214A CN1133214A (en) 1996-10-16
CN1043314C true CN1043314C (en) 1999-05-12

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CN95103925A Expired - Fee Related CN1043314C (en) 1995-04-13 1995-04-13 Modified soluble organic adhesive for casting

Country Status (1)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101927319A (en) * 2010-04-29 2010-12-29 苏州市兴业铸造材料有限公司 Adhesive applicable for manufacturing casting mold and use thereof
CN106694793B (en) * 2015-11-17 2019-12-03 胡坦斯·阿尔伯图斯化学厂有限公司 Use of alkaline compositions, corresponding methods, molds and systems
MX2019001540A (en) * 2016-08-12 2019-05-09 Dow Global Technologies Llc Method for making water-based pressure sensitive adhesive compositions.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305370A (en) * 1962-06-20 1967-02-21 Foseco Int Mold composition for foundry use
CN1032127A (en) * 1987-04-04 1989-04-05 天津市南开区铸造涂料厂 Composite type binding material for casting
CN1076391A (en) * 1992-03-17 1993-09-22 滨州师范专科学校 A kind of method of utilizing cotton oil distillation residues to make moulding sand binder
CN1088859A (en) * 1993-01-02 1994-07-06 大连市金州区同益化工厂 High-strength adhesive for casting
CN1098960A (en) * 1993-03-22 1995-02-22 阿姆威公司 Home water purification system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305370A (en) * 1962-06-20 1967-02-21 Foseco Int Mold composition for foundry use
CN1032127A (en) * 1987-04-04 1989-04-05 天津市南开区铸造涂料厂 Composite type binding material for casting
CN1076391A (en) * 1992-03-17 1993-09-22 滨州师范专科学校 A kind of method of utilizing cotton oil distillation residues to make moulding sand binder
CN1088859A (en) * 1993-01-02 1994-07-06 大连市金州区同益化工厂 High-strength adhesive for casting
CN1098960A (en) * 1993-03-22 1995-02-22 阿姆威公司 Home water purification system

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CN1133214A (en) 1996-10-16

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