Characteristic aldehyde-less cold core box resin

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...

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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

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