Two-component binder system for the polyurethane cold-box process

A binder, two-component technology, used in cores, mold components, manufacturing tools, etc., to solve pinhole defects, comma defects, casting defects, etc.

Active Publication Date: 2017-08-18
HUTTENES ALBERTUS CHEM WERKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The presence of nitrogen-containing compounds can also cause casting defects (nitrogen defects), such as pinhole defects or comma defects (Komma-Fehler)

Method used

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  • Two-component binder system for the polyurethane cold-box process
  • Two-component binder system for the polyurethane cold-box process
  • Two-component binder system for the polyurethane cold-box process

Examples

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Effect test

example 82 and 91

[0259] Furthermore, further advantages of the invention are the low tendency to stick and the high flowability of the molding material mixture with the two-component binder system according to the invention. The molding material mixture acts very dry. Very good sharpness of contour and high shaping accuracy were exhibited during the production of test specimens from the molding compound mixture according to the invention. The samples obtained are characterized by high edge strength.

[0260] BTX emissions of casting cores and molds produced according to the polyurethane cold box process during casting (at 700° C. Measured emissions of benzene, toluene and mixed xylenes) are reduced by 50% or more.

[0261] Table 4

[0262]

[0263]

[0264]

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PUM

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Abstract

A description is given of a two-component binder system, in particular for use in the polyurethane cold-box process, a mixture for curing by contact with a tertiary amine, a method for producing a feeder, a foundry mould or a foundry core and feeders, foundry moulds and foundry cores that can be produced by this method, and the use of a two-component binder system according to the invention or a mixture according to the invention for binding a basic moulding compound or a mixture of basic moulding compounds, in particular in the polyurethane cold-box process.

Description

technical field [0001] The application relates to a two-component adhesive system, especially used in the polyurethane cold box process, a kind of adhesive system used in combination with a tertiary amine (wherein the term "tertiary amine" also includes in the scope of the application two or more mixtures of more tertiary amines) contact hardening mixtures, a method for producing risers, molds or cores and risers, molds and cores which can be produced according to the method, and the double Use of component binder systems or mixtures according to the invention for bonding molding stock or mixtures of molding stock, especially in the polyurethane cold box process. Background technique [0002] In the manufacture of risers, molds and casting cores, two-component adhesive systems which cold-harden while forming polyurethanes are generally used for bonding the molding stock. The binder system consists of two components, namely a (normally soluble in solvent) polyol (polyol comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22
CPCB22C1/2253B22C1/2273B22C1/20B22C9/10B22C9/06C08G18/542C08G18/7657
Inventor 弗兰克·伦曾
Owner HUTTENES ALBERTUS CHEM WERKE
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