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Wet strengthening agent and preparation method thereof

A wet strength agent and process technology, applied in the field of corrugated paper production, can solve the problems of unrealized commercialization, and achieve the effects of strengthening comprehensive performance, improving folding resistance, and increasing dry strength

Inactive Publication Date: 2016-04-20
丹阳市华兴纸箱有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyamide epichlorohydrin (PAE) is currently the most widely used wet strength agent in the world. Melamine formaldehyde resin (MF) and urea formaldehyde resin (CF) are gradually eliminated due to the content of formaldehyde. Other wet strength agents such as PEI polymer Carboxylic acids, etc. have not been commercialized

Method used

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  • Wet strengthening agent and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A wet strength agent, the wet strength agent is a PAE resin, and its raw material components are: adipic acid, diethylenetriamine, p-toluenesulfonic acid, epichlorohydrin.

[0023] The preparation process of a wet strength agent comprises two parts, the first stage is the synthesis of prepolymer polyamide polyamine (PPC) and the second stage is the synthesis of the final product PAE resin. The specific steps of the two stages are:

[0024] Preparation of PPC prepolymer

[0025] (1) Taking adipic acid is 44.95g, diethylenetriamine is 33.3ml, and p-toluenesulfonic acid is 1.059g;

[0026] (2) Turn on the condensed water, add diethylenetriamine and a small amount of deionized water 5ml into a 250ml three-necked flask, turn on the electric mixer, and add adipic acid while stirring;

[0027] (3) After the feeding is completed, turn on the magnetic stirrer, raise the temperature to 160°C, and keep warm for 1 hour. After the heat preservation is completed, remove the reflux ...

Embodiment 2

[0034] A wet strength agent, the wet strength agent is a PAE resin, and its raw material components are: adipic acid, diethylenetriamine, p-toluenesulfonic acid, epichlorohydrin.

[0035] The preparation process of a wet strength agent comprises two parts, the first stage is the synthesis of prepolymer polyamide polyamine (PPC) and the second stage is the synthesis of the final product PAE resin. The specific steps of the two stages are:

[0036] Preparation of PPC prepolymer

[0037] (1) Taking adipic acid is 44.95g, diethylenetriamine is 33.3ml, and p-toluenesulfonic acid is 1.059g;

[0038] (2) Turn on the condensed water, add diethylenetriamine and a small amount of deionized water 5ml into a 250ml three-necked flask, turn on the electric mixer, and add adipic acid while stirring;

[0039] (3) After the feeding is completed, turn on the magnetic stirrer, raise the temperature to 170°C, and keep warm for 1.2 hours. After the heat preservation is completed, remove the refl...

Embodiment 3

[0046] A wet strength agent, the wet strength agent is a PAE resin, and its raw material components are: adipic acid, diethylenetriamine, p-toluenesulfonic acid, epichlorohydrin.

[0047] The preparation process of a wet strength agent comprises two parts, the first stage is the synthesis of prepolymer polyamide polyamine (PPC) and the second stage is the synthesis of the final product PAE resin. The specific steps of the two stages are:

[0048] Preparation of PPC prepolymer

[0049] (1) Taking adipic acid is 44.95g, diethylenetriamine is 33.3ml, and p-toluenesulfonic acid is 1.059g;

[0050] (2) Turn on the condensed water, add diethylenetriamine and a small amount of deionized water 5ml into a 250ml three-necked flask, turn on the electric mixer, and add adipic acid while stirring;

[0051] (3) After the feeding is completed, turn on the magnetic stirrer, raise the temperature to 180°C, and keep warm for 1.5 hours. After the heat preservation is completed, remove the refl...

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Abstract

The present invention provides a wet strengthening agent preparation process, wherein the wet strengthening agent is a PAE resin and comprises the raw materials such as adipic acid, diethylenetriamine, p-toluenesulfonic acid and epichlorohydrin. The invention relates to a process for preparing the wet strengthening agent by using the raw materials, wherein the process is characterized in that the process is divided into two stages, the first stage comprises synthesizing a prepolymer polyamide polyamine (PPC), and the second stage comprises synthesizing the final product PAE resin. According to the present invention, with the addition of the PAE wet strengthening agent, the tear index of the corrugated paper is improved and is increased by 59%, the bursting strength is increased by 33%, the transverse ring crush strength is increased by 28%, and the folding resistance is increased by 240% so as to substantially enhance the comprehensive performance of the corrugated paper.

Description

technical field [0001] The invention relates to the field of corrugated paper production, in particular to a wet strength agent and a preparation process of the wet strength agent. Background technique [0002] Corrugated base paper is one of the important raw materials used to manufacture corrugated boxes. The strength of corrugated base paper directly determines the strength of corrugated cardboard. In recent years, there is a large room for growth in high-strength corrugated base paper. In addition, a large number of domestic manufacturers now use waste paper and other secondary fibers As the raw material for producing corrugated base paper, compared with the corrugated base paper produced from raw fiber raw materials, the corrugated base paper produced from waste paper has more fine components, and these fine components are easily lost with white water. Adding papermaking wet strength agent can Improve the retention rate of fine components and improve the physical streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/20C08G69/48
Inventor 吉兴华
Owner 丹阳市华兴纸箱有限公司
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