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Method for preparing dialkylamidoimidazoline quaternary ammonium salt type paper softening agent

A technology of alkylamide imidazoline and softener, which is applied in the field of preparation of paper softener and bis-alkylamide imidazoline quaternary ammonium salt type paper softener, can solve the problem of lack of hand feeling properties of amide softener and reduce the static friction between fibers Coefficient and other problems, to achieve the effect of reducing the static friction coefficient between fibers and strong adsorption force

Inactive Publication Date: 2008-07-09
GUANGDONG PAPER IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quaternary ammonium salt softeners rely on electricity to combine with fibers, which can greatly reduce the static friction coefficient between fibers, and also have bactericidal and anti-mildew effects, but they lack the smooth feel of amide softeners

Method used

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  • Method for preparing dialkylamidoimidazoline quaternary ammonium salt type paper softening agent
  • Method for preparing dialkylamidoimidazoline quaternary ammonium salt type paper softening agent
  • Method for preparing dialkylamidoimidazoline quaternary ammonium salt type paper softening agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Step 1, synthesis of two alkylamide imidazolines

[0029] In a 500ml four-neck flask equipped with a stirrer, a thermometer, a condenser and a water separator, add 320 parts of stearic acid and heat to melt, stir and melt completely, add 1.2 parts of sodium methoxide catalyst and nitrogen protection, slowly drop 80 Parts of diethylenetriamine, exothermic phenomenon can be observed after a few minutes, and the color of the reactant gradually changes from light to dark. Control the dropping speed, gradually raise the temperature after the dropping, and gradually separate the water until the temperature rises to 200°C, and stop the reaction when no water comes out.

[0030] Step 2, synthesis of dialkylamide imidazoline quaternary ammonium salt type paper softener

[0031] Take 300 parts of the intermediate dialkylamide imidazoline prepared in the first step and add it to a 500ml three-necked flask, add 125 parts of isopropanol and stir evenly, then raise the temperature t...

Embodiment 2

[0033] Step 1, synthesis of two alkylamide imidazolines

[0034] In a 500ml four-neck flask equipped with a stirrer, a thermometer, a condenser and a water separator, add 340 parts of stearic acid and heat to melt, stir and melt completely, add 1.6 parts of sodium methoxide catalyst and nitrogen protection, slowly drop 100 parts Parts of diethylenetriamine, exothermic phenomenon can be observed after a few minutes, and the color of the reactant gradually changes from light to dark. Control the dropping speed, gradually raise the temperature after the dropping, and gradually separate the water until the temperature rises to 200°C, and stop the reaction when no water comes out.

[0035] Step 2, synthesis of dialkylamide imidazoline quaternary ammonium salt type paper softener

[0036] Take 280 parts of the intermediate dialkylamide imidazoline prepared in the first step and add it to a 500ml three-necked flask, add 120 parts of isopropanol and stir evenly, then raise the temper...

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Abstract

The invention relates to a process for preparation of a dialkyl acidamide imidazoline quaternaries paper softening agent, which comprises steps of: a, synthesizing the dialkyl acidamide imidazoline, that is, charging stearic acid into a four-way flask for heating and melting, then after the stearic acid is melted charging catalyzer and nitrogen for protection, slowly dropping diethylenetriamine for reaction to obtain the dialkyl acidamide imidazoline; b, preparing the paper softening agent of the invention, that is, charging the dialkyl acidamide imidazoline prepared in the first step into a three-way flask, charging alcohol isopropylicum, evenly mixing, then gradually dropping dimethyl sulfate, and keeping the temperature for a while to obtain the softening agent. The paper softening agent of the invention is characterized by the softening properties of both acidamide type and quaternaries type and strong fiber absorption ability, can greatly lower interfiber static friction coefficient, and has a smooth hand feeling.

Description

technical field [0001] The invention relates to a paper softening agent, in particular to a preparation method of a bisalkylamide imidazoline quaternary ammonium salt type paper softening agent, which belongs to the technical field of paper making auxiliaries. Background technique: [0002] Paper softener is a new type of papermaking auxiliary that can be adsorbed on fibers to increase the softness of paper and make paper feel comfortable and soft. In the past, softeners were mainly used in textiles, and were rarely used in paper processing. Crepe paper such as toilet paper and facial tissue needs to have a certain softness and feel, and easy-to-fold paper such as cellophane, waxed paper, and non-woven fabrics also requires softness, so softeners have also begun to be used in the paper industry. [0003] At present, the softeners for paper mainly include wax emulsions, metal complexes, polysiloxanes and reactive softeners. Wax emulsion is mainly made of non-ionic wax or lo...

Claims

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Application Information

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IPC IPC(8): D21H21/22
Inventor 许桂红邓汉祥王伟
Owner GUANGDONG PAPER IND RES INST
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