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Curing agent for casting furan resin

A technology of furan resin and curing agent, which is applied in casting and molding equipment, molds, manufacturing tools, etc., can solve the problems of shortening the use time of furan resin and insufficient time for sand mixing and molding.

Inactive Publication Date: 2016-06-22
黄石汇波材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the adjustment of resin and curing agent, shortening the demolding time can improve the production efficiency of foundry enterprises, but this will generally lead to shortening of the usable time of furan resin for casting, resulting in insufficient time for sand mixing and molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of mother liquor A:

[0014] Add 100kg of xylene to a 2.5-ton reactor, heat up, and start adding 1380kg of sulfuric acid with a mass percentage concentration of 98% dropwise when the temperature rises to 40°C. 120°C, keep warm for 60 minutes, cool down to 40°C~50°C, add 470kg of methanol and 30kg of urea, keep warm for 60 minutes, cool down to 30°C~40°C, add 10kg of hydrogen peroxide, and stir for 20 minutes.

[0015] Preparation of mother liquor B:

[0016] Add 500kg of sulfuric acid with a mass percentage concentration of 98% into a 1.5-ton reactor, heat up, and slowly add 100kg of methanol dropwise. The temperature of the dropping process is controlled at 50°C~60°C. , add 300kg of water and 30kg of aluminum trichloride, and stir for 30 minutes.

[0017] Take 130kg of mother liquor A and 10kg of mother liquor B, put them into a reactor and mix them uniformly to obtain the curing agent for casting furan resin.

Embodiment 2

[0019] Preparation of mother liquor A:

[0020] Add 110kg of xylene to a 2.5-ton reactor, heat up, and start adding 1380kg of sulfuric acid with a mass percentage concentration of 98% dropwise when the temperature rises to 40°C. 120°C, keep warm for 60 minutes, cool down to 40°C~50°C, add 470kg of methanol and 40kg of urea, keep warm for 60 minutes, cool down to 30°C~40°C, add 10kg of hydrogen peroxide, and stir for 20 minutes.

[0021] Preparation of mother liquor B:

[0022] Add 500kg of sulfuric acid with a mass percentage concentration of 98% into a 1.5-ton reactor, heat up, slowly add 140kg of methanol dropwise, control the temperature during the dropwise addition at 50°C~60°C, keep warm for 20 minutes after the addition, and cool down to 40°C~50°C , add 300kg of water and 30kg of aluminum trichloride, and stir for 30 minutes.

[0023] Take 130kg of mother liquor A and 15kg of mother liquor B, put them into a reactor and mix them uniformly to obtain the curing agent for...

Embodiment 3

[0025] Preparation of mother liquor A:

[0026] Add 130kg of xylene to a 2.5-ton reactor, heat up, and start adding 1380kg of sulfuric acid with a mass percentage concentration of 98% dropwise when the temperature rises to 40°C. 120°C, keep warm for 60 minutes, cool down to 40°C~50°C, add 480kg of methanol and 40kg of urea, keep warm for 60 minutes, cool down to 30°C~40°C, add 10kg of hydrogen peroxide, and stir for 20 minutes.

[0027] Preparation of mother liquor B:

[0028] Add 540kg of sulfuric acid with a mass percentage concentration of 98% into a 1.5-ton reactor, heat up, and slowly add 140kg of methanol dropwise. The temperature of the dropping process is controlled at 50°C~60°C. , add 300kg of water and 50kg of aluminum trichloride, and stir for 30 minutes.

[0029] Take 130kg of mother liquor A and 20kg of mother liquor B, put them into a reactor and mix them uniformly to obtain the curing agent for casting furan resin.

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PUM

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Abstract

The invention discloses a curing agent for casting furan resin. The curing agent is prepared through mixing 13-15 parts by mass a mother liquor A with 1-2 parts by mass of a mother liquor B, wherein the mother liquor A comprises, by mass, 10-12 parts of xylene, 138-142 parts of sulfuric acid with the mass percentage concentration of 98%, 47-50 parts of methanol, 3-5 parts of urea and 1-3 parts of hydrogen peroxide; and the mother liquor B comprises, by mass, 50-57 parts of sulfuric acid with the mass percentage concentration of 98%, 10-14 parts of methanol, 30-35 parts of water and 3-8 parts of aluminum trichloride. The novel curing agent for casting furan resin has the advantages of no large influences in the use period, shortening of the curing time and improvement of the production efficiency of casting enterprises through adjusting resin and the curing agent.

Description

technical field [0001] The invention relates to a synthetic resin binder, in particular to a curing agent for casting furan resin. Background technique [0002] Furan resin curing agent for casting is an important casting material used with furan resin, which has a very important influence on the effect of casting modeling. After adding the curing agent, it will go through two steps of sand mixing molding and demoulding. The general demoulding time is 5-10 minutes, while the sand mixing molding time of medium and large casting molds generally takes 5-40 minutes. Through the adjustment of resin and curing agent, shortening the demoulding time can improve the production efficiency of foundry enterprises, but this generally leads to the shortening of the usable time of furan resin for casting, resulting in insufficient time for sand mixing and molding. Contents of the invention [0003] Aiming at the above problems, the present invention proposes a novel curing agent for cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/10
Inventor 卢觉晓乔添刘洁余波
Owner 黄石汇波材料科技股份有限公司
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