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Adhesive for casting and preparation method of adhesive

A technology of adhesives and solvents, which is applied in the field of hybridization of zirconium diacetate adhesives, can solve problems affecting strength and surface quality, changing shell bonding conditions, and inclusion defects of surface precipitates

Pending Publication Date: 2021-12-31
宝鸡昆吾创新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the production of titanium and zirconium alloy precision casting, the shell made of zirconium diacetate is made layer by layer, that is, the first layer is coated with zirconium diacetate adhesive on the surface of the lost foam and then covered with sand, waiting for the adhesive to dry Then carry out the second layer of coating and sand coating, and the second layer of adhesive will cause the first layer of dry zirconium diacetate to get wet again and dissolve back, which will change the bonding conditions of the shell, thus affect its strength and surface quality
This will eventually lead to peeling off of the shell surface coating and inclusion defects caused by surface precipitates, seriously affecting the quality of titanium castings

Method used

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  • Adhesive for casting and preparation method of adhesive
  • Adhesive for casting and preparation method of adhesive
  • Adhesive for casting and preparation method of adhesive

Examples

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preparation example Construction

[0037] The preparation process of the above adhesive is as follows:

[0038] a, Preparation of polyvinyl butyral sol (PVB)

[0039] Prepare 0.5-2 parts of polyvinyl butyral and 90-120 parts of absolute ethanol in parts by mass.

[0040] First add all the absolute ethanol into a closed container, heat it to 60°C and keep it, divide the polyvinyl butyral into 2 parts, add it at intervals of 30 minutes, and stir continuously with a magnetic stirrer until the polyvinyl butyral is completely dissolved in the in water ethanol.

[0041] b. Preparation of acetic acid latex solution

[0042] Prepare 1.2 to 2 parts of cetyltrimethylammonium chloride solution with a solid content of about 30% in parts by mass, and 1 part of natural rubber latex. Stir and mix evenly. The mass ratio of ammonium chloride solution=5:1 ratio, slowly add acetic acid, and stir and mix evenly, make its pH value≤4, add 0.1%~0.3% tributyl phosphate and continue to stir for defoaming, and finally Stand still fo...

Embodiment 1

[0054] Prepare 62 parts of zirconium diacetate, 6 parts of distilled water, 0.3 part of latex, 0.5 part of cetyltrimethylammonium chloride and 5 parts of acetic acid in parts by mass.

[0055] Zirconium diacetate solution was prepared by mixing zirconium diacetate with distilled water.

[0056] Mix and stir cetyltrimethylammonium chloride solution and latex evenly, let stand for 24 hours, then slowly add acetic acid into the above mixed solution and keep stirring until evenly mixed, optionally add defoamer for defoaming, After standing still for 24 hours, the obtained acid latex was added into the zirconium diacetate solution to prepare an anti-resolution adhesive.

Embodiment 2

[0058] Prepare 70 parts of zirconium diacetate, 10 parts of distilled water, 0.3 parts of acrylic emulsion, 0.5 parts of latex, 0.7 parts of cetyltrimethylammonium chloride and 7 parts of acetic acid in parts by mass.

[0059] Zirconium diacetate solution was prepared by mixing zirconium diacetate with distilled water.

[0060] Mix cetyltrimethylammonium chloride solution and latex evenly, let it stand for 24 hours, then slowly add acetic acid into the above mixed solution and keep stirring until it is evenly mixed, finally add acrylic acid emulsion and stir evenly, let stand for 24 hours Hours, and then add the resulting mixed solution of acid latex and acrylic acid emulsion into the zirconium diacetate solution to prepare an anti-return adhesive.

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Abstract

The invention discloses an adhesive for casting and a preparation method of the adhesive. The adhesive for the casting and the preparation method of the adhesive mainly aim at hybrid modification of a zirconium diacetate adhesive in the field of casting titanium, zirconium, namely alloys thereof, especially resolubility improvement of the zirconium diacetate adhesive, and acid latex, acrylic emulsion and vinyl acetate emulsion are added into the zirconium diacetate adhesive to perform the hybrid modification on the zirconium diacetate adhesive, so that the redissolution resistance of the adhesive is improved. The redissolution problem in the shell manufacturing process is eliminated, and the surface coating falling caused by shell redissolution and inclusion defects generated by surface precipitates are reduced.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to the hybridization of zirconium diacetate adhesives. Background technique [0002] In investment casting or lost foam casting and other precision casting processes, refractory materials and adhesives are mixed and coated on the surface of the model to form a shell. For ordinary metal materials, the shells made of conventional refractory materials and adhesives can meet the requirements of use, while metals such as titanium and zirconium need to use special refractory materials and adhesives to make shells. In the state of high-temperature liquid melting, alloys such as titanium and zirconium have very active chemical properties, and can chemically react with almost all conventional shell materials to varying degrees to form α-contaminated layer defects. These defects change the original titanium and zirconium alloys. The properties of titanium and zirconium castings have seriously affect...

Claims

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Application Information

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IPC IPC(8): B22C1/20
CPCB22C1/205
Inventor 梁俊喜孙亚军周源
Owner 宝鸡昆吾创新技术有限公司
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