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Casein modifying method

A casein and modified technology, applied in animal husbandry, application, chemical treatment of small raw hides/large raw hides/leather hides/furs, etc. Improve the hardness and brittleness of the film, ensure the effect of color fixing and good flexibility

Inactive Publication Date: 2019-12-03
上海欧畅新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nowadays, the application range of casein has gradually expanded to the field of ink coatings, but there are still some problems in the application. Because casein contains a large number of polar groups, such as amino groups, hydroxyl groups, carboxyl groups, etc., a strong bond is formed between these groups. The interaction makes the formed film discontinuous. Although this can endow the casein film with air-permeable and water-permeable performance, it also causes the defects of hard and brittle film, low elongation, and easy fracture. At the same time, because of the strong hydrophilicity, the film still exists Not resistant to moisture, not resistant to wet rubbing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] a. Preparation of initiator solution: the persulfate is formulated into a solution of 0.05 to 0.15 wt %, the solvent is deionized water, stirred evenly, and set aside;

[0023] b. Preparation of monomer solution: prepare 2-5g cyclosiloxane into a 3-5wt% solution, use deionized water as the solvent, add a pH regulator dropwise, adjust the pH to be greater than 8, and stir evenly to obtain a monomer A solution , stand-by; prepare 3-6g amide compound into a 3-5wt% solution, the solvent is deionized water, stir evenly to obtain monomer B solution, stand-by;

[0024] c. Preparation of casein solution: 25-30g of casein is formulated into a solution of 12-18wt%, the solvent is deionized water, a pH regulator is added dropwise, and the pH is adjusted to be greater than 8, heated to 70-80°C, kept warm, and waited use;

[0025] d. Modification of casein: Take 10-20ml of the initiator solution, divide it into two even parts, first add one part of the initiator solution and the mo...

Embodiment 1

[0058] Embodiment 1 provides a kind of casein modification method, comprises the following steps:

[0059] a. Preparation of initiator solution: persulfate is formulated into a 0.12wt% solution, the solvent is deionized water, stirred evenly, and set aside;

[0060] b. Preparation of monomer solution: 4g of cyclosiloxane was prepared into a 4wt% solution, the solvent was deionized water, a pH regulator was added dropwise to adjust the pH to greater than 8, and the mixture was evenly stirred to obtain a monomer A solution for use; 4g of the amide compound was formulated into a 4wt% solution, the solvent was deionized water, and stirred evenly to obtain a monomer B solution for use;

[0061] c. Preparation of casein solution: 28g of casein is formulated into a 16wt% solution, the solvent is deionized water, a pH regulator is added dropwise, the pH is adjusted to be greater than 8, heated to 75°C, kept warm, and set aside;

[0062] d. Modification of casein: Take 18ml of initiat...

Embodiment 2

[0070] Embodiment 2 provides a kind of casein modification method, comprises the following steps:

[0071] a. Preparation of initiator solution: persulfate is formulated into a 0.12wt% solution, the solvent is deionized water, stirred evenly, and set aside;

[0072] b. Preparation of monomer solution: 6g of amide compound was formulated into a 4wt% solution, the solvent was deionized water, and stirred evenly to obtain a monomer solution, which was set aside;

[0073] c. Preparation of casein solution: 28g of casein is formulated into a 16wt% solution, the solvent is deionized water, a pH regulator is added dropwise, the pH is adjusted to be greater than 8, heated to 75°C, kept warm, and set aside;

[0074] d. Modification of casein: Measure 18ml of initiator solution, add the initiator solution and monomer solution dropwise into the casein solution at the same time, stir for 2 hours, concentrate at 85°C, and cool to obtain.

[0075] The persulfate is potassium persulfate.

...

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PUM

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Abstract

The invention discloses a casein modifying method. The casein modifying method comprises the following steps: (1) preparation of an initiator solution, (2) preparation of a monomer solution, (3) preparation of a casein solution, and (4) modification of casein. A film formed by the modified casein which is prepared by using the modifying method not only is water-permeable and breathable, but also can ensure the color fixing effect after wet rubbing is performed, and the film has good flexibility, so that the problems of hardness and brittleness of the casein formed film are solved, applicationof casein in coatings, ink and other fields is widened, and a gravure ink diluent which is prepared from the modified casein has wide compatibility and excellent printability.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a method for modifying casein. Background technique [0002] Casein is a widely used water-soluble film-forming agent. It is extracted from milk and is essentially a complex protein. It is environmentally friendly and safe, and meets the current market demand for environmentally friendly products. In the past, casein has been used in leather finishing, due to its strong adhesion with leather, the formed film has good temperature resistance, and more importantly, casein film has excellent air permeability and water permeability, which is what many coatings have. Not available. [0003] Nowadays, the application range of casein has gradually expanded to the field of ink coatings, but there are still some problems in the application. Because casein contains a large number of polar groups, such as amino, hydroxyl, carboxyl, etc., these groups form a strong The interaction makes the formed f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H1/00C09D11/03C09D7/65C14C11/00
CPCC08H1/00C09D7/65C09D11/03C14C11/003
Inventor 黄清根王正青李扬勇黄玮黄惠昌
Owner 上海欧畅新材料科技有限公司
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