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

A method of epoxy resin and epoxy resin technology, applied in casting molding equipment, molds, cores, etc., can solve the problems of poor impact resistance and insignificant toughening effect

Active Publication Date: 2012-10-10
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of Polyurethane Modified Epoxy Resin

[0053] (1) Put 180 kg of melted benzyl ether phenolic resin (weight average molecular weight 600) into the reaction kettle, heat and stir, dehydrate under vacuum (vacuum degree is 15mm Hg), until the temperature reaches 120°C without bubbles. Cool down to 60°C, add 15 kg of polyisocyanate PM-200;

[0054] (2) Adjust the condenser of the reaction kettle to the reflux state, pass steam under stirring to raise the temperature, raise the temperature to 70°C within 30 minutes, and keep the temperature at 70-90°C for 180 minutes;

[0055] (3) After the heat preservation is over, cool the material to 60°C, add 805 kg of epoxy resin DER331, raise the temperature in the kettle to 110°C within 60 minutes, and keep the temperature at 110-150°C for 180 minutes, then cool down, that is Obtain polyurethane modified epoxy resin.

[0056] The preparation of component I: 600 kilograms of above-mentioned polyurethane modified epoxy res...

Embodiment 2

[0059] Preparation of Polyurethane Modified Epoxy Resin

[0060] (1) Put 160 kilograms of melted benzyl ether phenolic resin (weight average molecular weight 800) into the reaction kettle, heat and stir, dehydrate under vacuum (vacuum degree is 15 mm Hg), until the temperature reaches 120 ° C without bubbles. Cool down to 60°C, add 20 kg of polyisocyanate PM-200;

[0061] (2) Adjust the condenser of the reaction kettle to the reflux state, pass steam under stirring to raise the temperature, raise the temperature to 70°C within 30 minutes, and keep the temperature at 70-90°C for 180 minutes;

[0062] (3) After the heat preservation is over, cool the material to 60°C, add 820 kg of epoxy resin DER331, raise the temperature in the kettle to 110°C within 60 minutes, and keep the temperature at 110-150°C for 180 minutes, then cool down, that is Obtain polyurethane modified epoxy resin.

[0063] Preparation of component I: add 630 kilograms of the above-mentioned polyurethane modi...

Embodiment 3

[0066] Preparation of Polyurethane Modified Epoxy Resin

[0067] (1) Put 134 kg of melted benzyl ether phenolic resin (weight average molecular weight 1200) into the reaction kettle, heat and stir, dehydrate under vacuum (vacuum degree is 15 mm Hg), until the temperature reaches 120 ° C without bubbles. Cool down to 60°C, add 16 kg of polyisocyanate PM-200;

[0068] (2) Adjust the condenser of the reaction kettle to the reflux state, pass steam under stirring to raise the temperature, raise the temperature to 70°C within 30 minutes, and keep the temperature at 70-90°C for 180 minutes;

[0069] (3) After the heat preservation is over, cool the material to 60°C, add 850 kg of epoxy resin DER331, raise the temperature in the kettle to 110°C within 60 minutes, and keep the temperature at 110-150°C for 180 minutes, then cool down, that is Obtain polyurethane modified epoxy resin.

[0070] The preparation of component I: 610 kilograms of above-mentioned polyurethane modified epoxy...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22
Inventor 祝建勋许增彬
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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