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A kind of solid AKD surface sizing agent and preparation method thereof

A technology of surface sizing agent and surfactant, applied in the field of solid AKD surface sizing agent and its preparation, can solve the problems of high production process requirements, reduced sizing effect, large amount of sizing agent, etc. Ease of control, low production cost, improved water resistance

Active Publication Date: 2017-12-05
ZHEJIANG HENGDA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emulsion-type AKD surface sizing agent has disadvantages such as easy hydrolysis leading to reduced sizing effect, short storage period, high transportation cost, and large amount of sizing agent, and the conditions for preparing emulsion-type AKD surface sizing agent are harsh, requiring a high-pressure homogenizer , freezing and cooling heat exchangers, etc., also have higher requirements on the production process

Method used

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  • A kind of solid AKD surface sizing agent and preparation method thereof
  • A kind of solid AKD surface sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation process of solid AKD paper surface sizing agent is as follows:

[0022] Add 15 parts of AKD wax powder, 1 part of Span60, 1.5 parts of glyceryl monostearate, 1 part of fatty alcohol polyoxyethylene ether (polymerization degree n=20) into the dry reactor, raise the temperature to 60°C, and wait until the system is completely melted After stirring for 30 minutes, after the system is fully stirred evenly, take it out and let it cool down to room temperature naturally to form a solid system, then pulverize it and fully mix it with 5 parts of ferrous sulfate heptahydrate solid to obtain a solid paper surface sizing agent.

Embodiment 2

[0024] The preparation process of solid AKD paper surface sizing agent is as follows:

[0025] Add 25 parts of AKD wax powder, 1 part of Span60, 2 parts of glyceryl distearate, 1 part of fatty alcohol polyoxyethylene ether (polymerization degree n=20) into the dry reactor, raise the temperature to 70°C, and wait until the system is completely melted After stirring for 40 minutes, after the system is fully stirred evenly, take it out and cool it down to room temperature naturally to form a solid system, then pulverize it and mix it with 10 parts of ferrous sulfate monohydrate solid to obtain a solid paper surface sizing agent.

Embodiment 3

[0027] The preparation process of solid AKD paper surface sizing agent is as follows:

[0028] Add 25 parts of AKD wax powder, 1 part of Span80, 2 parts of glyceryl monostearate, 1 part of fatty alcohol polyoxyethylene ether (polymerization degree n=30) into the dry reactor, raise the temperature to 65 ° C, and wait until the system is completely melted After stirring for 50 minutes, after the system is fully stirred evenly, take it out and let it cool down to room temperature naturally to form a solid system, then pulverize it and fully mix it with 8 parts of ferrous sulfate heptahydrate solid to obtain a solid paper surface sizing agent.

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Abstract

The invention discloses a solid AKD (alkyl ketene dimer) surface sizing agent and a preparation method thereof. A solid AKD, a lipophilic surfactant and a hydrophilic surfactant in certain ratio are added to a reactor, then the mixture is heated to 60 DEG C, after solids are melted totally, stirring is performed slowly until a transparent system is formed, the temperature is reduced to the room temperature finally, modified solid AKD is obtained and uniformly mixed with ferrous sulfate, and the modified solid AKD paper surface sizing agent with high effective content, excellent storage stability, convenience in transportation and excellent sizing effect can be obtained. The prepared surface sizing agent can be compounded with a starch aqueous solution for paper surface sizing, and physical indexes such as waterproofness, mechanical strength and the like of paper can be improved remarkably under the condition of quite small dosage.

Description

【Technical field】 [0001] The invention relates to the field of sizing agent preparation, in particular to a solid AKD surface sizing agent and a preparation method thereof. 【Background technique】 [0002] At present, reactive paper surface sizing agents mainly include alkyl ketene dimer (AKD) and ASA, among which alkyl ketene dimer (AKD) is more commonly used, but the AKD surface sizing agent currently produced is mainly through cationic Emulsion type AKD surface sizing agent prepared by using starch or synthetic cationic polymer as emulsifier. Emulsion-type AKD surface sizing agent has disadvantages such as easy hydrolysis leading to reduced sizing effect, short storage period, high transportation cost, and large amount of sizing agent, and the conditions for preparing emulsion-type AKD surface sizing agent are harsh, requiring a high-pressure homogenizer , freezing and cooling heat exchangers, etc., also have higher requirements on the production process. Therefore, an A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H19/38D21H19/62D21H19/54
CPCD21H19/38D21H19/54D21H19/62D21H21/16
Inventor 丁九斤姜文龙叶素芳方宏赵新民
Owner ZHEJIANG HENGDA NEW MATERIAL CO LTD