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Phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid and preparing method of phosphate binding agent

A technology of hydroxyethylidene diphosphonic acid and phosphate, which is used in manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problem of insignificant improvement of sand sample strength and fluidity, poor fluidity of molding sand, unstable performance, etc. problem, to achieve the effect of enhanced wrapping effect, enhanced bonding performance, and improved performance

Active Publication Date: 2019-12-31
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Phosphate binder, as a green and environmentally friendly inorganic casting binder, has the characteristics of good collapsibility, colorless, and no irritating odor, and can significantly reduce environmental pollution, but compared with traditional organic resin adhesives The binder has the disadvantages of unstable performance, poor moisture absorption resistance, high viscosity, and poor fluidity of molding sand.
Aiming at the related characteristics of phosphate binder, modifying it, such as the addition of some simple small molecular weight acid modifiers, can improve the performance of phosphate binder to a certain extent, but the sand sample strength and the improvement of liquidity is not obvious

Method used

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  • Phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid and preparing method of phosphate binding agent
  • Phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid and preparing method of phosphate binding agent
  • Phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid and preparing method of phosphate binding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Phosphate Binder Modified by Hydroxyethylidene Diphosphonic Acid

[0029] 1. Raw material ratio

[0030] 338g of 85% industrial phosphoric acid, 77.5g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 4g of silicic acid, 8g of light magnesium oxide, 4.9g of hydroxyethylidene diphosphonic acid, and 200g of purified water.

[0031] 2. Preparation steps

[0032] (1) Add phosphoric acid into the reaction kettle and heat to 180-200°C while stirring;

[0033] (2) adding aluminum hydroxide powder in the reaction kettle several times in a small amount, and continuing to stir until the reaction solution is transparent;

[0034] (3) Add 50g of water, heat and stir until the temperature of the reaction solution returns to the temperature before adding water;

[0035] (4) Add boric acid powder, continue heating and stirring until the reaction solution is transparent;

[0036] (5) Add silicic acid powder, continue heating and stirring until the reaction so...

Embodiment 2

[0043] Preparation of Phosphate Binder Modified by Hydroxyethylidene Diphosphonic Acid

[0044] 1. Raw material ratio

[0045] 338g of 85% industrial phosphoric acid, 77.5g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 4g of silicic acid, 8g of light magnesium oxide, 9.8g of hydroxyethylidene diphosphonic acid, and 200g of purified water.

[0046] 2. The preparation steps are the same as those in Example 1.

Embodiment 3

[0048] Preparation of Phosphate Binder Modified by Hydroxyethylidene Diphosphonic Acid

[0049] 1. Raw material ratio

[0050] 338g of 85% industrial phosphoric acid, 77.5g of 320 mesh aluminum hydroxide powder, 12g of boric acid, 4g of silicic acid, 8g of light magnesium oxide, 15.7g of hydroxyethylidene diphosphonic acid, 200g of purified water.

[0051] 2. The preparation steps are the same as those in Example 1.

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Abstract

The invention provides a phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid and a preparing method of the phosphate binding agent. The phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid is mainly prepared from, by mass percentage, 51.59-52.45% of industrial phosphoric acid, 11.83-12.03% of aluminum hydroxide powder, 0.61-0.62% of silicic acid,1.83-1.86% of boric acid, 1.22-1.24% of light magnesium oxide, 0.76-2.4% of 1-hydroxyethylidene-1,1-diphosphonic acid and 30.53-31.04% of water. According to the phosphate binding agent modified by 1-hydroxyethylidene-1,1-diphosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid is adopted as a modifier, and even under the condition of a small addition amount, the viscosity of the binding agentcan be significantly lowered, the strength of a prepared sand sample can be significantly improved, added raw materials participate in the reaction to the greatest extent, few residues are generated,water loss is reduced to guarantee that the binding agent has low viscosity, and the fluidity of foundry sand is improved.

Description

technical field [0001] The invention belongs to the field of foundry industry, and in particular relates to a phosphate binder modified by hydroxyethylidene diphosphonic acid and a preparation method thereof. Background technique [0002] Phosphate binder, as a green and environmentally friendly inorganic casting binder, has the characteristics of good collapsibility, colorless, and no irritating odor, and can significantly reduce environmental pollution, but compared with traditional organic resin adhesives The binder has the disadvantages of unstable performance, poor moisture absorption resistance, high viscosity, and poor fluidity of molding sand. Aiming at the related characteristics of phosphate binder, modifying it, such as the addition of some simple small molecular weight acid modifiers, can improve the performance of phosphate binder to a certain extent, but it will affect the strength of sand samples. And the improvement of mobility is not obvious. In order to a...

Claims

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Application Information

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IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 张友寿喻双喜夏露周磊
Owner HUBEI UNIV OF TECH
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