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Preparation method of modified polyarylether (PAE) resin

A resin and modification technology, which is applied in the field of preparation of modified PAE resin, can solve the problems of not being able to meet the needs of high wet strength paper humidification strength, PAE resin can not be fully matured, etc., to achieve enhanced wet strength performance and dry strength improvement , Improve the effect of wet strength index

Inactive Publication Date: 2014-03-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this curing requires a certain amount of time and temperature, under the operating conditions of the paper machine, the PAE resin cannot be fully matured and cannot meet the needs of high humidity strength paper.

Method used

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  • Preparation method of modified polyarylether (PAE) resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Synthesis of polyamine prepolymer:

[0019] At 170°C, react diethylenetriamine and adipic acid under the action of p-toluenesulfonic acid catalyst for 4 hours to synthesize polyamine prepolymer. After the reaction, dilute with water to a solid content of 50%;

[0020] The molar ratio of the polyethylene polyamine, adipic acid and catalyst is 1:0.95:0.01;

[0021] 2) Epoxyalkylation reaction:

[0022] Adjust the solid content of the polyamine prepolymer to 25% and the pH value to 8, add the carboxyl modifier maleic anhydride, raise the temperature to 50°C, slowly add epichlorohydrin, raise the temperature to 70°C for 2 hours, and the reaction is over Finally, add hydrochloric acid, adjust the pH value to 4, terminate the reaction, add water to dilute to a solid content of 12.5%, and obtain the modified PAE resin;

[0023] The molar ratio of the polyamine prepolymer, carboxyl modifier, and epichlorohydrin is 1:0.1:1.2.

Embodiment 2

[0025] 1) Synthesis of polyamine prepolymer:

[0026] At 160°C, react triethylenetetramine and adipic acid under the action of p-toluenesulfonic acid catalyst for 6 hours to synthesize polyamine prepolymer. After the reaction, dilute with water to a solid content of 50%;

[0027] The molar ratio of the polyethylene polyamine, adipic acid and catalyst is 1:1:0.01;

[0028] 2) Epoxyalkylation reaction:

[0029] Adjust the solid content of the polyamine prepolymer to 20% and the pH value to 9, add the carboxyl modifier fumaric acid, raise the temperature to 55°C, slowly add epichlorohydrin, raise the temperature to 65°C and react for 3 hours, after the reaction, Add hydrochloric acid, adjust the pH value to 3, terminate the reaction, add water to dilute to a solid content of 12.5%, and obtain the modified PAE resin;

[0030] The molar ratio of the polyamine prepolymer, carboxyl modifier, and epichlorohydrin is 1:0.15:1.4.

Embodiment 3

[0032] 1) Synthesis of polyamine prepolymer:

[0033] At 180°C, react tetraethylenepentamine and succinic acid for 4 hours under the action of catalyst p-toluenesulfonic acid to synthesize polyamine prepolymer. After the reaction, dilute with water to a solid content of 50%;

[0034] The molar ratio of the polyethylene polyamine, succinic acid and catalyst is 1:0.9:0.01;

[0035] 2) Epoxyalkylation reaction:

[0036] Adjust the solid content of the polyamine prepolymer to 30% and the pH value to 8, add the carboxyl modifier maleic anhydride, raise the temperature to 30°C, slowly add epichlorohydrin, raise the temperature to 75°C for 1 hour, and the reaction is over Finally, add hydrochloric acid, adjust the pH value to 4, terminate the reaction, add water to dilute to a solid content of 12.5%, and obtain the modified PAE resin;

[0037] The molar ratio of the polyamine prepolymer, carboxyl modifier, and epichlorohydrin is 1:0.1:1.1.

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Abstract

A preparation method of modified polyarylether (PAE) resin comprises the following steps of: reacting polyethylene polyamine and binary acid under effects of a catalyst to synthesize polyamine prepolymer, adjusting a solid content of the polyamine prepolymer tobe 20-30%, adjusting a pH value to be 8-10, adding carboxyl modifier, then adding epichlorohydrin, adding hydrochloric acid after a reaction is completed, adjusting the pH value to be 3-4 and finishing the reaction to obtain the modified PAE resin. Carboxyl is introduced in a molecular structure of the PAE resin, the carboxyl is used for balancing positive electricity carried by the PAE resin, and electric charge control of the PAE resin is achieved. Simultaneously, after paper is used, the carboxyl carried by the modified resin can form hydrogen bonds between fibers, the carboxyl in a structure of the PAE resin and epoxy functional groups and the like exist simultaneously, after the carried carboxyl forms the hydrogen bonds between fibers, a distance of the epoxy functional groups and primary amine groups and the like between different PAE resins is reduced, covalent bonds are conveniently formed, time needed by curing is shortened, and accordingly, paper forming humidity and strength are improved, and a humidifying and strength performance are strengthened.

Description

technical field [0001] The invention relates to a preparation method of PAE resin, in particular to a preparation method of modified PAE resin. Background technique [0002] The wet strength of paper refers to the strength remaining after the paper is saturated with water. Commonly used wet strength agents are urea-formaldehyde resin (UF resin), melamine-formaldehyde resin (MF resin), polyamide epichlorohydrin resin (PAE resin), etc. Among them, PAE resin can endow paper with a good humidifying strength effect under medium-alkaline conditions and meet the needs of medium-alkaline papermaking, and has become a commonly used humidifying agent for papermaking. The synthesis of PAE resin is generally through fatty dibasic acid, such as malonic acid, succinic acid, glutaric acid, adipic acid or sebacic acid, etc. and polyethylene polyamine, such as diethylene triamine, triethylene tetramine, tetraethylene Ethylene pentamine, etc. react to produce polyamide polyamine, and then r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02D21H17/56D21H21/20
Inventor 王建邱金峰玉丽芳王志杰刘羚张丹
Owner SHAANXI UNIV OF SCI & TECH
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