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A kind of preparation method of environment-friendly cross-linking modified PAE papermaking high humidity strengthening agent

A technology of cross-linking modification and humidification strength agent, which is applied in the field of papermaking additives. It can solve problems such as inability to increase process flow and product loss, and achieve the effects of improving wet strength, simple process and convenient operation.

Active Publication Date: 2018-10-16
浙江恒川新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods for reducing chloropropanol are mainly ion exchange method, biological treatment method, physical adsorption method, etc., but because of the problems such as easy product loss and increased process flow, it cannot be widely promoted in industrialization

Method used

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  • A kind of preparation method of environment-friendly cross-linking modified PAE papermaking high humidity strengthening agent

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preparation example Construction

[0017] The invention discloses a preparation method of an environment-friendly cross-linking modified PAE papermaking high-humidification strength agent. (according to parts by weight) preparation method steps are as follows:

[0018] (1) Stir and mix 26-30 parts of diethylenetriamine, 1-4 parts of melamine and 0.5-0.8 parts of catalyst concentrated sulfuric acid, then add 35-42 parts of adipic acid, and react for 5 hours at a high temperature of 150-165°C Lower the temperature to below 120°C, add water to adjust the solution with a solid content of 50%, and obtain the intermediate polyamide polyamine prepolymer; (2) mix the polyvinyl alcohol solution with a mass fraction of 10% and the cationic etherifying agent at a ratio of 100:1 After the mass ratio of -4 is mixed evenly, adjust the pH value of the system to 8-10 with alkali, and react at 60-70°C for 2-3h to obtain cationic modified polyvinyl alcohol; (3) Take 50 parts of 50% prepolymer Solution, add 50 parts of water to ...

Embodiment 1

[0023] Stir and mix 30 parts of diethylenetriamine, 2 parts of melamine and 0.8 parts of concentrated sulfuric acid, then add 35 parts of adipic acid, react at a high temperature of 150°C for 5 hours, then cool down to below 120°C, add water to adjust the content to 50%, The intermediate polyamide polyamine prepolymer is obtained. After mixing the polyvinyl alcohol solution with a mass fraction of 10% and 3-chloro-2-hydroxypropyltrimethylammonium chloride at a mass ratio of 100:1, adjust the pH value of the system to 10 with alkali, and set the temperature at 60°C Reaction 3h makes cationic modified polyvinyl alcohol;

[0024] Take 50 parts of 50% polyamide polyamine prepolymer solution, add 50 parts of water to dilute, and slowly add 16 parts of epichlorohydrin dropwise, after the dropwise addition is completed, react at 35°C for 3 hours and then raise the temperature to 60°C for reaction 1h, add 2 parts of cation-modified polyvinyl alcohol 1799, and keep warm for 2h.

[00...

Embodiment 2

[0028] Stir and mix 30 parts of diethylenetriamine, 2 parts of melamine and 0.75 parts of concentrated sulfuric acid, then add 42 parts of adipic acid, react at 150°C for 5 hours, then cool down to below 120°C, add water to adjust the content to 50%, The intermediate polyamide polyamine prepolymer is obtained. After mixing the polyvinyl alcohol solution with a mass fraction of 10% and 3-chloro-2-hydroxypropyltrimethylammonium chloride at a mass ratio of 100:2, adjust the pH value of the system to 10 with alkali, and set the temperature at 70°C React for 2h to prepare cationic modified polyvinyl alcohol. Take 50 parts of 50% polyamide polyamine prepolymer solution, add 50g of water to dilute, and slowly add 17 parts of epichlorohydrin, react at 35°C for 3h, then raise the temperature to 60°C for 1h, add 3g of polyvinyl alcohol 1799, continue to keep warm for 2h.

[0029] Add 20 parts of water and 1.5 parts of glutaraldehyde for viscosity raising reaction. The reaction time is...

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Abstract

The invention discloses a method for preparing environmental-friendly cross-linking modified PAE (Polyamide Polyamine Epichlorohydrin) paper-making high-wet-strengthening additive. The method comprises the following steps: (1) stirring and mixing diethylenetriamine, melamine and catalyst concentrated sulfuric acid, adding adipic acid, performing reaction at high temperature, and cooling so as to obtain an intermediate, namely a polyamide polyamine prepolymer; (2) preparing cation modified polyvinyl alcohol from a polyvinyl alcohol solution and a cationic etherifying agent under the action of alkali catalysis; and (3) adding water to dilute the polyamide polyamine prepolymer, slowly dropping epoxy chloropropane, performing reaction, further performing temperature rising reaction, adding the cation modified polyvinyl alcohol for reaction, adding water and an aldehyde cross-linking agent for viscosity improvement reaction, when meeting a preset viscosity, adding sulfuric acid and water, and terminating reaction. The paper-making high-wet-strengthening additive prepared by using the method has the advantages that the wet strength of paper can be very well improved, and the residual amount of chloropropanol is greatly reduced when being compared with that of a product in the market.

Description

technical field [0001] The invention relates to the field of papermaking auxiliary agents, in particular to a preparation method of an environment-friendly cross-linked modified PAE papermaking high-moisture strength agent. Background technique [0002] Polyamide polyamine epichlorohydrin resin (referred to as PAE) is a thermosetting water-soluble resin, which has good paper wet strength, high retention rate, less dosage, non-toxic and harmless, and does not release formaldehyde. Suitable for medium-alkaline papermaking and other advantages, it is the most widely used wet strength agent for papermaking at present. [0003] At present, PAE wet strength agent for papermaking is promoted, and the residual problem of chloropropanol in its products has gradually attracted people's attention. At present, the residual content of chloropropanol in domestic PAE papermaking wet strength agent is generally 1% to 6%, most of which are chloropropanol, which is far higher than the intern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/20
CPCD21H21/20
Inventor 赵新民杨柳青林俊辉刘敏陈宪吴小军王建军
Owner 浙江恒川新材料有限公司