Characteristic aldehyde-less cold core box resin

A cold core box and resin technology, applied in cores, casting molding equipment, casting molds, etc., can solve the problems of poor moisture resistance of sand cores, poor process performance, affecting workers' health, etc., to extend the usable time, improve Anti-hygroscopic, health-protecting effect

Inactive Publication Date: 2006-08-30
SUZHOU XINGYE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the casting performance is good, but in the core molding process, the process performance is poor, the sand core (type) has poor moisture resistance, short storage period, high gas generation, and will emit harmful gases of aldehyde and phenol during the operation process, polluting the environment, Affect workers' health

Method used

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  • Characteristic aldehyde-less cold core box resin
  • Characteristic aldehyde-less cold core box resin
  • Characteristic aldehyde-less cold core box resin

Examples

Experimental program
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Embodiment

[0024] Embodiment: a characteristic formaldehyde-free cold box resin, including two components I and II, the I component is a phenolic resin, with formaldehyde, phenol, modified animal fats, and aromatic hydrocarbon solvents as main raw materials, synthesized through chemical reactions; Component II is mainly made of polyisocyanate and modified animal fat;

[0025] The production process of component I includes the following steps:

[0026] (1) 485 kilograms of formaldehyde are dropped into reactor, start stirring, put in 1000 milliliters of 20% dilute hydrochloric acid;

[0027] (2) pump 400 kilograms of phenol into melting;

[0028] (3) Open the steam valve to raise the temperature, the heating time is 55-60 minutes, and the feed liquid is heated to 109±2°C;

[0029] (4) Incubate at 109±2°C for 40 minutes;

[0030] (5) After the heat preservation is completed, the temperature of the material is raised to 115±2°C, and the heating time is 10 minutes;

[0031] (6) Keep warm...

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PUM

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Abstract

The present invention discloses a characteristic aldehydeless cold core box resin. It includes two components of A and B. The component A is synthesized by using formaldehyde, benzophenol, modified animal fat and aromatic solvent as main raw material through chemical reaction, and the component B is made up by using polymeric isocyanate and modified animal fat as main raw material. Said invention can greatly raise the strength of sand core and sand mould.

Description

technical field [0001] The invention relates to a characteristic formaldehyde-free cold box resin. Background technique [0002] With the rapid development of my country's foundry industry and the extensive use of resin sand technology, its demand is gradually increasing. The currently used cold box resin has two parts, of which component I uses paraformaldehyde and phenol, high-boiling aromatic hydrocarbons such as esters, ethers, ketones and other polar solvents as the main raw materials, after addition of paraformaldehyde and phenol 1. Polymerization reaction, a synthesis process using high-boiling aromatic hydrocarbon solvents as diluents; component II uses polyisocyanate and high-boiling aromatic hydrocarbon solvents as main raw materials, and is mechanically stirred. Although the casting performance is good, but in the core molding process, the process performance is poor, the sand core (type) has poor moisture resistance, short storage period, high gas generation, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22C08G18/08C08G18/54C08L75/04
Inventor 王进兴
Owner SUZHOU XINGYE MATERIALS TECH
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