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Preparation method of urea-isobutyl aldehyde-formolite copolymerization resin

A technology of formaldehyde copolymerization resin and isobutyraldehyde, which is applied in the field of coating/ink additives to achieve the effects of good compatibility, good compatibility, and high flexibility in process operation

Inactive Publication Date: 2008-04-23
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of preparation method of urea-isobutyraldehyde-formaldehyde copolymer resin of coating multi-functional auxiliary agent in view of the problems existing in resins currently used for coating / ink universal color paste and improving the performance of coating / ink

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Catalyst

[0046] In 50 grams of deionized water, add 50 grams of sulfuric acid, 10 grams of phosphoric acid, and 2 grams of dodecylbenzenesulfonic acid, stir well and set aside.

[0047] (2) Organic solvent

[0048] Mix 100 grams of petroleum ether and 100 grams of xylene evenly and set aside.

[0049] (3) Preparation of resin

[0050] Put 25 grams of urea and 70 grams of isobutyraldehyde into a 500ml four-necked flask, and while stirring continuously, add a certain amount of catalyst until the pH value of the system reaches 3, and react at 60°C for 4 hours; add 40 grams of isobutyraldehyde and 80 grams of formaldehyde, then gradually add the catalyst dropwise until the pH value is 1, and react at a temperature of 90°C for 4 hours; add 150 grams of organic solvent, stir for 20 minutes, and after standing for 30 minutes, use a separatory funnel to separate the lower aqueous phase. Wash 10 times with deionized water at 60°C; remove small molecules by vacuum evapor...

Embodiment 2

[0054] (1) Catalyst

[0055] In 30 grams of deionized water, add 10 grams of sulfuric acid and 10 grams of phosphoric acid, stir well and set aside.

[0056] (2) Organic solvent

[0057] Xylene

[0058] (3) Preparation of resin

[0059] Put 30 grams of urea and 90 grams of isobutyraldehyde into a 500ml four-necked flask, add a certain amount of catalyst under constant stirring, until the pH value of the system reaches 2, keep the temperature at 90°C for 2 hours; add 70 grams of isobutyraldehyde and 100 grams of formaldehyde, then gradually add the catalyst dropwise until the pH value is 1, and react at 90°C for 2 hours; add 200 grams of organic solvent, stir for 20 minutes, let stand for 30 minutes, and separate the lower aqueous phase with a separatory funnel , wash 10 times with deionized water at 80°C; remove small molecules by vacuum evaporation, when the pressure reaches 2000Pa and the resin temperature reaches 150°C, pour out the resin while it is hot, and cool to obt...

Embodiment 3

[0064] (1) Catalyst

[0065] In 80 grams of deionized water, add 10 grams of sulfuric acid, 20 grams of phosphoric acid, and 10 grams of acetic acid, stir evenly, and set aside

[0066] (2) Organic solvent

[0067] Mix 200 grams of petroleum ether and 100 grams of butyl acetate evenly, and set aside.

[0068] (3) Preparation of resin

[0069] Put 25 grams of urea and 70 grams of isobutyraldehyde into a 500ml four-necked flask, add a certain amount of catalyst under constant stirring, until the pH value of the system reaches 3, keep the temperature at 60°C for 2 hours; add 40 grams of isobutyraldehyde and 80 grams of formaldehyde, then gradually add the catalyst dropwise until the pH value is 1, and react at 40°C for 8 hours; add 120 grams of organic solvent, stir for 20 minutes, and after standing for 30 minutes, use a separatory funnel to separate the lower aqueous phase; Wash 4 times with deionized water at 80°C; remove small molecules by vacuum evaporation, when the pres...

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PUM

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Abstract

Production of urea-isobutyl aldehyde-formaol copolyresin is carried out by adding urea into isobutyl aldehyde, dripping into catalyst to pH 2-4, agitating at 40-90 degrees C for 2-8hrs, adding into formaol and isobutyl aldehyde successively, adding into catalyst to pH 1-3, agitating at 40-90 degrees C for 2-8hrs, adding into organic solvent, agitating, laying aside to laminate, removing water phase in the lower layer, washing by deionized water at 40-80degrees C, vacuum evaporating, removing small-molecule substance to obtain final product. It has excellent intermiscibility, low viscosity, better anti-yellow and adhering abilities, hardness and glossiness.

Description

technical field [0001] The invention relates to the technical field of coating / ink additives, more specifically, to a preparation method of a urea-isobutyraldehyde-formaldehyde copolymer resin used as a coating / ink additive. Background technique [0002] Coating / ink additives are an important class of materials in coating / ink products. Although they are used in small amounts in coatings / inks, they play a key role in improving and improving the performance of coatings / ink coatings. Therefore It has been paid more and more attention by people in the industry, and it has even reached the level of being inseparable from them in some products. At present, many paint / ink manufacturers regard the application of additives in the formula as the technical know-how and technical secret of the company's products. The application level of paint / ink additives has become one of the symbols to measure the technical level of paint / ink production. [0003] Adhesion, anti-yellowing, hardness...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/36
Inventor 曾幸荣张一甫徐迎宾林晓丹李鹏
Owner SOUTH CHINA UNIV OF TECH