Preparation method of papermaking wet strength agent

A technology of wet strength agent and stiffness agent, which is applied in papermaking, reinforcing agent addition, textile and papermaking, etc. It can solve the problems affecting the use of paper and long curing time, and achieve good humidity effect, rich source, ductility and flow good sex effect

Active Publication Date: 2015-11-25
GUANGDONG PAPER IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional PPE wet strength agent takes a long time to mature, and the paper can only produce about 50% of the wet strength effect when it is put into the pape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the four-necked flask, under nitrogen protection, first 46.4 grams of diethylenetriamine and 30.3 grams of dimethyl adipate were stirred and mixed, then 168 grams of dimer acid was added and stirred and mixed; then 0.34 grams of p-toluenesulfonic acid was added, and React for 4 hours at a temperature of 140°C; finally lower the temperature and add 220 g of dilution water to obtain a polyamide polyamine prepolymer aqueous solution with a solid content of 50%.

[0027] At room temperature, to the prepolymer solution obtained above, first add 290 grams of dilution water, then add 16.9 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride, stir evenly, and slowly add 41.4 grams of cyclic After the addition of oxychloropropane, react for 1 hour, then raise the temperature to 60°C, and keep the temperature for 3 hours. Finally, add sulfuric acid to adjust the pH value to 4.5, add 325 grams of water to dilute to a papermaking wet strength agent with a solid content of...

Embodiment 2

[0029] In the four-necked flask, under nitrogen protection, first 46.4 grams of diethylenetriamine and 26.1 grams of diethyl adipate were stirred and mixed, then 168 grams of dimer acid was added and stirred and mixed; then 0.40 grams of p-toluenesulfonic acid was added, and React for 5 hours at a temperature of 130° C.; finally lower the temperature and add 180 grams of dilution water to obtain a polyamide polyamine prepolymer aqueous solution with a solid content of 55%.

[0030] At room temperature, add 330 grams of dilution water to the prepolymer solution obtained above, then add 16.6 grams of 2,3-epoxypropyltrimethylammonium chloride, stir well, and slowly add 46.0 grams of epoxy Chloropropane, react for 2 hours after the addition, then raise the temperature to 70°C, and keep it warm for 2.5 hours. Finally, add formic acid to adjust the pH value to 4.5, and add 150 grams of water to dilute it to a papermaking wet strength agent with a solid content of 30%.

Embodiment 3

[0032] In the four-necked flask, under the protection of nitrogen, first stir and mix 51.5 grams of diethylenetriamine and 20.8 grams of dimethyl adipate, then add 196 grams of dimer acid and stir and mix; then add 0.30 grams of p-toluenesulfonic acid, in The reaction was carried out for 3 hours at a temperature of 150°C; finally, the temperature was lowered, and 248 g of dilution water was added to obtain an aqueous solution of polyamide polyamine prepolymer with a solid content of 50%.

[0033] At room temperature, to the prepolymer solution obtained above, first add 330 grams of dilution water, then add 16.9 grams of 3-chloro-2-hydroxypropyltrimethylammonium chloride, stir well, and slowly add 49.7 grams of cyclic After the addition of oxychloropropane, react for 1 hour, then raise the temperature to 65°C, and keep it warm for 3 hours. Finally, add phosphoric acid to adjust the pH value to 4.5, and add 155 grams of water to dilute it to a papermaking wet strength agent with...

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PUM

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Abstract

The invention discloses a preparation method of a papermaking wet strength agent. The preparation method comprises the following steps: (1) carrying out polymerization reaction on polyamine, adipate, dimer acid and a catalyst under a heating condition, so as to obtain a polyamide polyamine prepolymer water solution; and (2) adding water, a cationic etherifying agent and epoxy chloropropane into the prepolymer water solution to react at the room temperature, heating to react, and finally adding acid to regulate the pH value, so as to obtain the papermaking wet strength agent with the solid content of 15%-35%. The papermaking wet strength agent has the advantages that the polymerization process is mild, stable and controllable, the gelling of the product caused by overreaction is basically avoided, and the solid content is relatively high; the reaction of monomers is complete; and the product is high in polymerization degree, good in adhesive property, good in quality effect, relatively low in curing temperature, easy to cure, and good in water resistance.

Description

technical field [0001] The invention belongs to the technical field of papermaking auxiliary agents, and in particular relates to a preparation method of a papermaking wet strength agent. Background technique [0002] Polyamide polyamine epichlorohydrin resin (referred to as PPE) is a thermosetting water-soluble resin. It has good paper wet strength, high retention rate, less dosage, non-toxic and harmless, and does not release formaldehyde. It is suitable for It is a kind of paper-making wet strength agent widely used in the paper-making industry because of its advantages in medium-alkaline papermaking. [0003] At present, the wet strength agent for PPE papermaking is mainly produced by adipic acid and diethylenetriamine under the action of a catalyst to generate polyamide polyamine, and then react with epichlorohydrin. Since PPE resin is a very active macromolecular resin, its high solid content is prone to intramolecular crosslinking, and its products are easy to gel, s...

Claims

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Application Information

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IPC IPC(8): C08G73/02D21H17/56D21H21/20
Inventor 许桂红陈继伟李倩钰
Owner GUANGDONG PAPER IND RES INST
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