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Sizing composition for casting moulds for metal casting, use thereof, and casting moulds provided with the sizing composition

A casting coating and composition technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems such as the use of CH-acid substances in casting coatings that have not been reported, and achieve economic advantages and improve moisture resistance Effect

Active Publication Date: 2021-03-09
ASK CHEM LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] None of the above documents reported the use of CH-acidic substances in casting coatings

Method used

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  • Sizing composition for casting moulds for metal casting, use thereof, and casting moulds provided with the sizing composition
  • Sizing composition for casting moulds for metal casting, use thereof, and casting moulds provided with the sizing composition
  • Sizing composition for casting moulds for metal casting, use thereof, and casting moulds provided with the sizing composition

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Embodiment Construction

[0037] Surprisingly, it has been found that by having the following structural unit (group) (-C(=O)-CH 2 The addition of CH-acidic compounds of -C(=O)-) to aqueous or alcoholic, preferably aqueous, casting coating compositions enables a permanent improvement in the quality of the coated cores and molds, e.g. the easy realization of cores and Storage stability of the mold for several days. All have at least one CH surrounded by carbonyl carbon atoms (C=O) 2 All compounds of the group are suitable.

[0038] Thus, CH-acidic compounds used according to the invention are β-dicarbonyl compounds (1,3-dicarbonyl compounds) having one or more of the following groups:

[0039] -C(=O)-CH 2 -C(=O)-.

[0040] Particularly preferably, this group has the following structure:

[0041] R 1 C(=O)-CH 2 -C(=O)-O- (I)

[0042] in,

[0043] R 1 is H, a C1 to C18 hydrocarbon, preferably a C1 to C12 hydrocarbon, or

[0044] -CH 2-X, wherein, X is a group containing 1-18 carbon atoms toget...

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Abstract

The invention relates to sizing compositions comprising an aqueous carrier liquid, fire-resistant base materials and CH-acidic compounds, and to the use thereof for casting moulds, and to casting moulds coated with the sizing composition.

Description

technical field [0001] The present invention relates to a foundry coating composition for casting moulds, such as molds or cores for metal casting, and to casting molds provided with the foundry coating composition. Furthermore, the invention relates to the use of the foundry coating composition for casting moulds. Background technique [0002] The casting mold basically consists of a mold or die and a core in the form of a negative representing the casting to be produced. Here, the mold and the core are usually made of a refractory mold base material, such as quartz sand and a suitable binder, which provides sufficient mechanical strength for the casting mold after it has been removed from the mold tool. The refractory mold base material is preferably present in a free-flowing form, enabling the refractory mold base material to be injected into a suitable hollow mold after mixing with the binder, pressed and then cured. [0003] During casting, the mold forms the outer wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/18B22C9/12B22C3/00
CPCB22C3/00C09D7/63B22C1/226B22C9/02B22C9/12C09D1/00
Inventor 克里斯蒂安·普里贝马库斯·邦格萨拉·沃斯乔尔格·克施根
Owner ASK CHEM LP