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Method for preparing water-soluble resin

A technology of water-soluble resins and raw materials, applied in adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problems of casting air hole defects, high drying temperature, and inaccurate dimensions, and achieve good collapsibility , Overcoming low thermal strength and improving moisture resistance

Inactive Publication Date: 2010-11-17
山东良艺化工新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's casting has a history of thousands of years, and China's foundry industry has achieved unprecedented development in modern history, and the resulting environmental pollution has become increasingly serious. Because manufacturers generally use synthetic grease and heavy oil as core materials for casting Binder, while synthetic fat oil and heavy oil are petrochemical by-products, which belong to oil-soluble resins. The solvents used in oil-soluble resins are mostly volatile and toxic substances. The main components are asphalt and ballast oil, which contain carcinogens. Large amount of gas generation, easy to creep, resulting in casting pore defects and inaccurate dimensions, in addition, in the process of casting production, a large amount of smoke will be generated, which seriously pollutes the environment and damages people's health

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] The preparation method of water-soluble resin comprises the steps:

[0021] At a temperature of 200°C and a pressure of 1.5 MPa, add 40 kg of acrylic waste silk to the reactor, then add 2 kg of sodium hydroxide and then add 60 kg of water for alkali hydrolysis for 3 hours, then Add 0.8 liter of formaldehyde and 0.8 liter of silane to continue the reaction for 4.5 hours, and the water-soluble resin of the present invention can be obtained after the reaction is completed.

Embodiment 2

[0023] The preparation method of water-soluble resin comprises the steps:

[0024] At a temperature of 190°C and a pressure of 1.3 MPa, add 30 kg of urethane waste silk into the reactor, then add 1 kg of sodium hydroxide and then add 50 kg of water to carry out the alkali hydrolysis reaction for 2 hours. Then add 0.2 liter of formaldehyde and 0.3 liter of silane to continue the reaction for 4 hours, and the water-soluble resin of the present invention can be obtained after the reaction is completed.

Embodiment 3

[0026] The preparation method of water-soluble resin comprises the steps:

[0027] At a temperature of 210°C and a pressure of 1.7 MPa, add 50 kg of acrylic fiber waste to the reactor, then add 3 kg of sodium hydroxide and then add 70 kg of water for alkali hydrolysis for 4 hours, then Add 2 liters of acetaldehyde and 1 liter of silane to continue the reaction for 5 hours, and the water-soluble resin of the present invention can be obtained after the reaction is completed.

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Abstract

The invention relates to a method for preparing resin, in particular to a method for preparing water-soluble resin. The method for preparing the water-soluble resin is characterized by comprising the following steps of: adding 30 to 50 kilograms of raw materials into a reaction kettle at the temperature of between 190 and 210 DEG C under the pressure of between 1.3 and 1.7MPa, then adding 1 to 3 kilograms of sodium hydroxide and 50 to 70 kilograms of water into the reaction kettle to perform alkaline hydrolysis reaction for 2 to 4 hours, adding 0.2 to 2 liters of low molecular aldehyde substance and 0.3 to 1 liter of silane into the reaction kettle and further reacting for 4 to 5 hours, and obtaining the water-soluble resin after the reaction is finished. The method has the advantages that: the water-soluble resin prepared by the method thoroughly solves the pollution problem of adhesive for casting by using the water as a medium, and has the advantages of low-temperature quick curing, energy conservation, no pollution, no odor, high strength, good collapsibility, wet creep resistance, dry moisture absorption resistance and the like.

Description

(1) Technical field [0001] The invention relates to a method for preparing a resin, in particular to a method for preparing a water-soluble resin. (2) Background technology [0002] The machinery industry is the basic industry of the national economy, and the foundry industry is the foundation of the machinery industry. China is a large and ancient foundry country. my country's casting has a history of thousands of years, and China's foundry industry has achieved unprecedented development in modern history, and the resulting environmental pollution has become increasingly serious. Because manufacturers generally use synthetic grease and heavy oil as core materials for casting Binder, while synthetic fat oil and heavy oil are petrochemical by-products, which belong to oil-soluble resins. The solvents used in oil-soluble resins are mostly volatile and toxic substances. The main components are asphalt and ballast oil, which contain carcinogens. Large amount of gas generation, ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/44C08F8/42C08F8/28C08F8/12C08G18/83C08G18/84C09J133/20C09J175/04
Inventor 侯良义
Owner 山东良艺化工新材料有限公司
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