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Glucose-phenol resin adhesive for foundry and a preparation method of same

A technology of phenol resin and glucose, applied in the field of casting glucose phenol resin binder and its preparation, can solve the problems of high cost, poor recyclability and poor performance of the binder, and achieves high dry tensile strength, high resistance to High temperature performance and good fluidity

Active Publication Date: 2012-07-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a glucose phenol resin binder for casting and its preparation method, which solves the problems of high cost, heavy pollution, poor reusability and poor performance of the casting binder in the prior art, and has a preparation process Simple, prepared adhesive with high strength, good process performance, high bonding strength, good storage stability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] (2) Preparation of Glucose Phenolic Resin Binder

[0025] Mix glucose and phenol at a mass ratio of 1:1-1:1.5, under the action of a catalyst, keep warm for 1-5 hours, then carry out vacuum distillation, pour the product into an ironware while it is hot, and cool to room temperature to obtain a brittle solid. Subsequent crushing and grinding are carried out to obtain powder, and the prepared glucose phenol phenolic resin is sealed and dried for future use;

[0026] (3) Made into casting binder

[0027] At a temperature of 70°C-80°C, mix the product obtained in step (1) with the product obtained in step (2) at a ratio of 1:9-3:7, stir for 1-3 hours, pour into the evaporator, and The evaporator is sent to a drier under any vacuum condition of 40°C-50°C for drying. After drying, the obtained product is crushed and sieved to 100-150 mesh in a grinder to obtain a glucose phenol resin binder for casting.

[0028] In step (1), the intercalation agent is a polyvinyl alcohol s...

Embodiment 1

[0033] (1) Raw materials: The source of inorganic bentonite: Liancheng County, Longyan, Fujian Province; other raw materials are commercial grades.

[0034] (2) The specific preparation method is as follows:

[0035] ① At a guaranteed heating temperature of 80°C, combine 100g-120g of inorganic bentonite and 90-105g of triethanolamine under stirring conditions (speed: 80 rpm) for organic reaction for 2-3 hours, and then Wash with centrifugal water.

[0036] ② When the heating temperature is guaranteed to be 80°C, gradually add dissolved polyvinyl alcohol while stirring, the concentration is 10% 80mL, and continue to stir continuously for 2-3 hours;

[0037] ③ Preparation of modified phenolic resin binder

[0038] React 30g of molten phenol with 40mL of water at a constant temperature of 60°C until the phenol and water are miscible, add 0.3g of sulfuric acid as a catalyst, and stir evenly; add 30g of glucose, stir evenly, then slowly raise the temperature to 105°C, and keep th...

Embodiment 2

[0048] (1) Raw materials: The source of inorganic bentonite: Liancheng County, Longyan, Fujian Province; other raw materials are commercial grades.

[0049] (2) The specific preparation method is as follows:

[0050] ①At a guaranteed heating temperature of 80°C, combine 100g-120g of inorganic bentonite and 90-105g of triethanolamine under stirring conditions (speed: 80 rpm) for organic reaction for 2-3 hours, and then Wash with centrifugal water.

[0051] ②In the case of ensuring that the heating temperature is 80°C, gradually add dissolved polyvinyl alcohol while stirring, and its concentration is 10% 80mL, and continue to stir continuously for 2-3h;

[0052] Preparation of modified phenolic resin binder

[0053] React 30g of molten phenol with 40mL of water at a constant temperature of 60°C until the phenol and water are miscible, add 0.3g of sodium hydroxide as a catalyst, and stir evenly; add 30g of glucose, stir evenly, then slowly raise the temperature to 105°C, and ke...

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Abstract

The invention discloses a glucose-phenol resin adhesive for foundry and a preparation method of the glucose-phenol resin adhesive. Glucose and phenol are co-condensed under the action of catalyst and then compounded after organic bentonite is added, so that the glucose-phenol resin adhesive for foundry is prepared; and the mass fraction of the organic bentonite in the adhesive is 1% to 10%. Compared with the prior art, the invention solves the problems of high cost, heavy pollution, poor recyclability and poor performance of the conventional adhesive for foundry and have the advantages of simple preparation technology, high strength of prepared adhesive, good technological performance, high adhesion strength, excellent storage stability and the like.

Description

technical field [0001] The invention belongs to the field of casting binders, and more specifically relates to a casting glucose phenol resin binder and a preparation method thereof. Background technique [0002] Foundry binder and its use technology are the main factors affecting the sand casting production environment and the performance of mold and core sand, and foundry binder is different from other binders in terms of performance, economy and environment. It also has its unique requirements, so according to the requirements of the foundry binder, it is imperative to develop a new type of non-toxic, non-polluting, excellent comprehensive performance casting binder and its modeling and core-making process. Traditional casting binders such as resin, tung oil, water glass, etc. have their own advantages and application ranges, but there are also some problems such as high cost of resin, complicated sand mixing process, and strong irritation during molding and pouring. Tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22
Inventor 郑玉婴
Owner FUZHOU UNIV
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