A kind of preparation method of papermaking wet strength agent

A technology of wet strength agent and cationic etherification agent, which is applied in papermaking, strengthening agent addition, textiles and papermaking, etc. It can solve the problems affecting the use of paper and long curing time, and achieve good product quality, low monomer residual rate, Good product quality and effect

Active Publication Date: 2017-07-11
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 paper machine. Generally, it needs to be stored at room temperature for more than one week to fully produce the wet strength effect, which will affect the use of paper.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a four-necked flask, under the protection of nitrogen, first stir and mix 46.4 g of diethylenetriamine and 30.3 g of dimethyl adipate, then add 168 g of dimer acid and stir and mix; At a temperature of 140° C., the reaction was carried out for 4 hours; finally, the temperature was lowered, and 220 grams of dilution water was added to obtain an aqueous solution of polyamide polyamine prepolymer 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, and after stirring evenly, slowly add 41.4 grams of ring After the addition of oxychloropropane, the reaction was performed for 1 hour, and then the temperature was raised to 60° C., and the reaction was maintained for 3 hours. Finally, sulfuric acid was added to adjust the pH value to 4.5, and 325 grams of water was added to dilute to a papermaking wet strength age...

Embodiment 2

[0029] In a four-necked flask, under the protection of nitrogen, first stir and mix 46.4 g of diethylenetriamine and 26.1 g of diethyl adipate, then add 168 g of dimer acid, stir and mix; At a temperature of 130° C., the reaction was carried out for 5 hours; finally, the temperature was lowered, and 180 grams of dilution water was added to obtain an aqueous solution of polyamide polyamine prepolymer with a solid content of 55%.

[0030] At room temperature, to the prepolymer solution obtained above, first add 330 g of dilution water, then add 16.6 g of 2,3-epoxypropyltrimethylammonium chloride, and after stirring evenly, slowly add 46.0 g of epoxy resin Chloropropane was added and reacted for 2 hours, then the temperature was raised to 70°C, and the reaction was maintained for 2.5 hours. Finally, formic acid was added to adjust the pH to 4.5, and 150 grams of water was added to dilute to a papermaking wet strength agent with a solid content of 30%.

Embodiment 3

[0032] In a four-necked flask, under the protection of nitrogen, first stir and mix 51.5 g of diethylenetriamine and 20.8 g of dimethyl adipate, then add 196 g of dimer acid, stir and mix; then add 0.30 g of p-toluenesulfonic acid, At a temperature of 150° C., the reaction was carried out for 3 hours; finally, the temperature was lowered, and 248 grams 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, and after stirring evenly, slowly add 49.7 grams of ring After the addition of oxychloropropane, the reaction was performed for 1 hour, and then the temperature was raised to 65° C., and the reaction was maintained for 3 hours. Finally, phosphoric acid was added to adjust the pH to 4.5, and 155 grams of water was added to dilu...

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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) polymerizing polyamine, adipic acid ester, dimer acid and a catalyst under heating conditions to obtain a polyamide polyamine pre-polymer Aqueous polymer solution. (2) In the prepolymer solution, add water, cationic etherifying agent and epichlorohydrin, react at room temperature and then heat up to carry out the reaction, and finally add acid to adjust the pH value to obtain a papermaking wet strength agent with a solid content of 15-35%. The papermaking wet strength agent of the invention has the advantages that the polymerization process is mild, stable and controllable, the product is not easy to overreact and gel, and the solid content is high; Good quality and effect; product curing temperature is low, easy to cure, good water resistance.

Description

technical field [0001] The invention belongs to the technical field of papermaking auxiliaries, in particular 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, low dosage, non-toxic and harmless and does not release formaldehyde, suitable for It is a kind of papermaking wet strength agent widely used in the papermaking industry. [0003] At present, PPE papermaking wet strength agent is mainly prepared from adipic acid and diethylenetriamine under the action of 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 cross-linking, and its products are easy to gel, so the solid content of PPE wet strength agent is low, generally about 12.5%, which leads to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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