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Bisamide quaternary ammonium salt sheet softening agent, preparation and uses thereof

A quaternary ammonium salt and softener technology, which is applied in the field of bisamide quaternary ammonium salt paper softener and its preparation, can solve the problems of poor water absorption of paper, and achieve the effects of speeding up the speed, shortening the reaction time, and easily obtaining raw materials

Inactive Publication Date: 2009-08-19
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emulsified wax softener is mainly used for wax paper and waterproof paper, and paper is less absorbent

Method used

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  • Bisamide quaternary ammonium salt sheet softening agent, preparation and uses thereof
  • Bisamide quaternary ammonium salt sheet softening agent, preparation and uses thereof
  • Bisamide quaternary ammonium salt sheet softening agent, preparation and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 130 g of glyceryl stearate into a three-necked flask equipped with a stirrer and a thermometer, heat to 60° C. to dissolve, add a p-toluenesulfonic acid catalyst accounting for 1.2% of the mass fraction of the raw material, and stir at a speed of 120 r / min. After the temperature was raised to 130°C, 33g of diethylenetriamine was added dropwise. After the dropwise addition of diethylenetriamine, the temperature was gradually raised to 150°C, and the temperature was kept for 2.5 hours. The water was separated by a water separator to obtain an intermediate.

[0023] Put 146g of the obtained intermediate into a three-necked flask, and raise the temperature to 95°C; gradually add 32g of dimethyl sulfate dropwise, keep it warm for 1 hour, and cool down to obtain a light yellow block product, which is the bisamide quaternary ammonium salt paper softener .

[0024] The appearance of the softener is a light beige paste solid with a special smell, and the cationic degree is 0...

Embodiment 2

[0026] Add 150g of glyceryl stearate into a three-necked flask equipped with a stirrer and a thermometer, heat to 60°C to dissolve, add a p-toluenesulfonic acid catalyst accounting for 1.4% of the mass fraction of the raw material, stir and heat up to 130°C, drop Add 44g of diethylenetriamine, after the dropwise addition of diethylenetriamine, gradually raise the temperature to 150°C, and keep it warm for 2 hours; pass through a water separator to separate water to obtain an intermediate.

[0027] Put 173g of the above-mentioned intermediate into a three-necked flask, and heat up to 95°C; gradually add 39g of dimethyl sulfate dropwise, keep the temperature for 1.5h, and cool the discharge to obtain a light yellow block product, which is the soft bisamide quaternary ammonium salt paper agent.

[0028] The appearance of the softener is a light beige paste solid with a special smell and a cationic degree of 0.6.

Embodiment 3

[0030] Application of bisamide quaternary ammonium salt paper softener

[0031] The pulp used in the papermaking experiment was 100% bleached wheat straw pulp provided by a paper mill, with a beating degree of 30°SR. Before the experiment, it was simply sieved to remove impurities such as pulp and slag.

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Abstract

The invention relates to a bisamide quaternary ammonium salt paper softening agent, a preparation method and application thereof. The raw material consists of tristearin, diethylenetriamine and dimethyl sulfate. The preparation method comprises the following steps: firstly, adding the tristearin into a container, heating and dissolving the tristearin, then adding a certain amount of paratoluenesulfonic acid catalyst, stirring the mixture and raising the temperature to 130 DEG C, dripping the diethylenetriamine, continuously raising the temperature to 150 DEG C after the dripping of the diethylenetriamine is finished, and separating the diethylenetriamine to obtain an intermediate product; then putting the intermediate product into the container, and heating the intermediate product to 95 DEG C; and gradually dripping the dimethyl sulfate, preserving heat, and discharging and cooling to obtain the bisamide quaternary ammonium salt paper softening agent. The bisamide quaternary ammonium salt paper softening agent can be used for toilet paper, napkin paper, cosmetic paper, towel tissue, diaper paper and the like; and during the preparation, the synthetic process is simple, and the raw material is easily obtained. During the preparation, the paratoluenesulfonic acid catalyst can remarkably accelerate the rate of amidation reaction and shorten the reaction time, and has the function of solubilizing.

Description

technical field [0001] The invention belongs to the technical field of chemical auxiliary agents, and in particular relates to a bisamide quaternary ammonium salt paper softener and a preparation method and application thereof. Background technique [0002] As people's demand for household paper is increasing day by day, the quality requirements for paper are also getting higher and higher, especially for the softness of paper. Because the paper fiber molecular chain contains multiple hydroxyl groups and is a linear macromolecule, strong intermolecular forces and hydrogen bonds are formed between the chains, so the paper has a certain strength and rigidity. By adding various additives and beating, etc. Mechanical action can disperse, degrade and reduce the crystallinity of fiber molecules, and play a certain role in softening, but it cannot fundamentally solve the problem of paper flexibility. To make the paper soft, the interaction force between the fiber molecules should ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/14
Inventor 李忆平
Owner SHANGHAI INST OF TECH
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