Epoxy resin double-component adhesion agent prepared by using cold box process as well as casting mixture and casting formed body

Abstract

The invention discloses an epoxy resin double-component adhesion agent system prepared by using a cold box process. The epoxy resin double-component adhesion agent is characterized in that the adhesion agent system blows gaseous sulfur dioxide to cure. The adhesion agent system comprises the following components in parts by weight: (a) 1-40 parts of benzyl ether phenolic resin; (b) 0.1-10 parts of polyisocyanate; (c) 40-80 parts of epoxy resin; (d) 20-30 parts of acrylate; (e) 1-30 parts of ester with a high boiling point and / or a hydrocarbon diluent; and (f) 15-75 parts of organic peroxides. The weight-average molecular weight of the benzyl ether phenolic resin is in a range of 500-2000. With the adoption of the adhesion agent system, the defects that the cold box adhesion agent for curing the sulfur dioxide by blowing in the prior art has poor brittleness and poor temperature resistance can be overcome, so that the strength of a core sand mould is improved in a casting process of the core sand mould; the rejection ratio is reduced; the quality of a casting piece is improved; and meanwhile, the viscosity of the adhesion agent is reduced. The epoxy resin double-component adhesion agent system is beneficial to a casting process.

Description

technical field [0001] The invention relates to a binder, which is used for casting resin sand mixture, solidified by blowing gaseous sulfur dioxide to form a core mold for manufacturing metal castings, and is suitable for various types of cast steel, cast iron and non-ferrous alloy parts in the foundry field . Background technique [0002] In the foundry industry, the cold box method refers to the process of using gas or aerosol catalyst to catalyze the instantaneous solidification of resin sand at room temperature. According to different gas or aerosol catalysts, the cold box method can be divided into amine method, SO2 method, CO2 resin method and methyl formate method. [0003] The French SPAIC company invented the SO2-furan resin method in 1971, called the Hardox method, and it was used in casting production in 1975. The process is: add peroxide-containing activator into the core sand, when SO2 passes through the core sand, combine with the new ecological oxygen relea...

AI Technical Summary

Problems solved by technology

Due to its shortcomings such as brittleness and poor impact resistance, people often add plasticizers in use, mainly for external plasticization, but the toughening effect is not significant, which has become a difficult problem restricting product applications.

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