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Method for preparing antibacterial and anticoagulant papermaking wet strength agent

A technology of wet strength agent and preparation steps, which is applied in the field of preparation of antibacterial and anticoagulant papermaking wet strength agent, which can solve the problems of impregnated paper gel, poor antibacterial performance of papermaking wet strength agent, etc., and achieve emulsion viscosity reduction and dispersion stability The effect of improving the property and reducing the molecular weight

Inactive Publication Date: 2018-04-13
常州市雄泰纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to provide a preparation method of an antibacterial and anticoagulant papermaking wet strength agent for the defects of poor antibacterial performance of papermaking wet strength agent and easy occurrence of gel phenomenon when impregnating paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] In parts by weight, add 30 parts of diethylenetriamine and 40 parts of diethanolamine to a three-necked flask equipped with reflux condenser and stirrer, start the stirrer, stir and mix at 300r / min for 10 minutes, continue to add 2 Parts of p-toluenesulfonic acid, 50 parts of adipic acid, heat the three-necked flask to 120°C, keep the reaction temperature for 35min to obtain the prepolymerized product; change the above-mentioned three-necked flask to the distillation device, continue to heat up to 180°C, keep the temperature for 1h, Until no more liquid is evaporated, the temperature is lowered to 100°C, add distilled water to the three-necked flask, control the solid mass content of the system in the three-necked flask to 50%, and stir for 20 minutes to obtain a yellow and transparent intermediate; take 15 parts by weight One part of chitosan was dissolved in 30 parts of 2% acetic acid solution and stirred for 30 minutes to obtain an acidified chitosan solution. 5 parts ...

example 2

[0028] In parts by weight, add 35 parts of diethylenetriamine and 43 parts of diethanolamine to a three-necked flask equipped with reflux condenser and stirrer, start the stirrer, stir and mix at 325r / min for 11 minutes, and continue to add 2 Parts of p-toluenesulfonic acid, 53 parts of adipic acid, heat the three-necked flask to 123°C, keep the reaction temperature for 40 minutes to obtain the prepolymerized product; change the above-mentioned three-necked flask to the distillation device, continue to heat up to 190°C, keep the temperature for 1.5h , Until there is no more liquid steaming out, cool to 105℃, add distilled water to the three-necked flask, control the solid mass content of the system in the three-necked flask to 50%, stir for 23min, and obtain a yellow transparent intermediate; 18 parts of chitosan was dissolved in 35 parts of 2% acetic acid solution, stirred for 33 minutes to obtain an acidified chitosan solution, 6 parts of epichlorohydrin was added to the acidi...

example 3

[0030] In parts by weight, add 40 parts of diethylenetriamine and 45 parts of diethanolamine to a three-necked flask equipped with reflux condenser and stirrer, start the stirrer, stir and mix at 350r / min for 12 minutes, continue to add 3 Parts of p-toluenesulfonic acid, 55 parts of adipic acid, heat the three-necked flask to 125°C, keep the reaction temperature for 45 minutes, and obtain the prepolymerized product; change the above-mentioned three-necked flask to a distillation device, continue to heat up to 200°C, keep the temperature for 2h, Until no more liquid is evaporated, the temperature is lowered to 110℃, distilled water is added to the three-necked flask, and the solid mass content of the system in the three-necked flask is controlled to 50%. Stir for 25min to obtain a yellow transparent intermediate; take 20 parts by weight One part of chitosan was dissolved in 40 parts of 2% acetic acid solution and stirred for 35 minutes to obtain an acidified chitosan solution. Ad...

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PUM

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Abstract

The invention relates to the technical field of preparation of papermaking assistants, and concretely relates to a method for preparing an antibacterial and anticoagulant papermaking wet strength agent. Modified chitosan is self made, and the modified chitosan reacts with modified PAE resin under an acidic condition to obtain the antibacterial and anticoagulant papermaking wet strength agent. Themodified chitosan improves the contact with bacterial negative cell bodies, destroys bacterial cell membranes to cause the leakage of intracellular enzymes and nucleic acids, and destroys the cell membrane structure to cause penetration of potassium ions and ATP, so the growth of bacteria is inhibited in order to achieve the antibacterial purpose; an emulsion increases the tightness between fibers, and the emulsion is combined with the hydroxyl groups of paper fibers through covalent bonds to form waterproof covalent bonds, so the dispersion stability is improved; and a diethanolamine modifiedPAE aqueous emulsion reduces the molecular weight of PAE, and the viscosity of the emulsion decreases, so the papermaking wet strength is not prone to generate gel, thereby the wet strength agent hasa broad prospect in papermaking applications.

Description

Technical field [0001] The invention relates to the technical field of preparation of papermaking aids, in particular to a preparation method of a bacteriostatic and anticoagulant papermaking wet strength agent. Background technique [0002] Generally, the fibers of untreated paper lose most of their strength when wetted with water. If some wet strength agents are added to the paper, the paper can still have mechanical strength that can meet the requirements of use after being wetted by water. With the continuous advancement of papermaking technology, the use of paper has become more and more extensive, and the demand for wet-strength paper is also increasing. Therefore, wet-strength agents have become a research hotspot at home and abroad. [0003] Wet-strength agents can improve the wet-strength mechanism of paper, which can be divided into two types. The first one is to protect the existing inter-fiber bonding mechanism. The moisturizing agent will produce a staggered chain net...

Claims

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Application Information

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IPC IPC(8): D21H21/20D21H21/36D21H17/55D21H17/24
CPCD21H17/24D21H17/55D21H21/20D21H21/36
Inventor 龙年生何俊欣张淑娴
Owner 常州市雄泰纺织品有限公司
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