Preparation method of permeation resistant addition agent with functions of reinforcing stiffness and wet-strength

A kind of anti-penetration aid, wet strength technology, applied in the field of papermaking aids

Inactive Publication Date: 2012-03-28
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still relatively few studies on the preparation of paper anti-penetration additives by modifying PAE resins. Therefore, compounding and modifying PAE wet strength resins is used to prepare an efficient and low-cost anti-penetration additive that meets the product

Method used

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  • Preparation method of permeation resistant addition agent with functions of reinforcing stiffness and wet-strength
  • Preparation method of permeation resistant addition agent with functions of reinforcing stiffness and wet-strength
  • Preparation method of permeation resistant addition agent with functions of reinforcing stiffness and wet-strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Synthesis of intermediate polyamide:

[0034] Add 35g of diethylenetriamine and 65g of water into a 500mL three-necked flask equipped with an electric stirrer, a thermometer and a reflux condenser. Add 48 g of adipic acid and a small amount of catalyst under stirring. After the system automatically releases heat and heats up to 120°C, keep it warm for 30 minutes, change the condensing and reflux device to a distillation device, and control the distillate speed to distill one drop in 3 seconds. Slowly heat up to 200°C and keep at this temperature for 30min. Cool, and when the temperature drops below 110°C, slowly add water to adjust the solid content to 50%, and continue to stir until the reactant is homogeneous, and the intermediate polyamide is obtained.

[0035] The applicant selected different catalysts to carry out the experiments in Example 1, and used the conversion rate of diethylenetriamine to represent the effect of each catalyst. The experimental results are...

Embodiment 2

[0041] Synthesis of intermediate polyamide (PPC):

[0042] Add 35g of diethylenetriamine and 65g of water into a 500mL three-necked flask equipped with an electric stirrer, a thermometer and a reflux condenser. 48 g of adipic acid and 0.5 g of catalyst p-toluenesulfonic acid were added under stirring. After the system automatically releases heat and heats up to 120°C, keep it warm for 30 minutes, change the condensing and reflux device to a distillation device, and control the distillate speed to distill one drop in 3 seconds. Slowly heat up to 140°C to 200°C, and keep at this temperature for 30 minutes. Cool, and when the temperature drops below 110°C, slowly add water to adjust the solid content to 50%, and continue to stir until the reactant is homogeneous, and the intermediate polyamide is obtained.

[0043] The applicant selected polymers in the synthesis temperature range of 140°C to 200°C to measure the conversion rate of diethylenetriamine monomer, and measured the w...

Embodiment 3

[0045] 1. Synthesis of polyamide polyamine epichlorohydrin (PAE)

[0046] (1) Synthesis of intermediate polyamide (PPC):

[0047] Add 35g of diethylenetriamine and 65g of water into a 500mL three-necked flask equipped with an electric stirrer, a thermometer and a reflux condenser. 48 g of adipic acid and 0.5 g of catalyst p-toluenesulfonic acid were added under stirring. After the system automatically releases heat and heats up to 110°C, keep it warm for 30 minutes, change the condensation reflux device to a distillation device, and control the distillate speed to 3 seconds to distill one drop. Slowly heat up to 155°C and keep at this temperature for 30min. Cool, and when the temperature drops below 110°C, slowly add water to adjust the solid content to 50%, and continue to stir until the reactants are in a homogeneous phase to obtain an intermediate polyamide.

[0048] (2) Epoxidation reaction of polyamide and epichlorohydrin:

[0049] Take 50 g of the intermediate polyam...

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Abstract

The invention discloses a preparation method of a permeation resistant addition agent with functions of reinforcing stiffness and wet-strength. The preparation method comprises the following main operating steps of: (1) firstly synthesizing midbody polyamide, then carrying out epoxidation on the polyamide and chloroepoxy propane to obtain polyamide epoxy chloropropane resin; (2) firstly synthesizing seed emulsion, then synthesizing a shell, obtaining a product which is fluorine containing acrylic ester core-shell emulsion; (3) carrying out composition modification on polyamide epoxy chloropropane and the fluorine containing acrylic ester core-shell emulsion to obtain the permeation resistant addition agent with the functions of reinforcing stiffness and wet-strength. According to the preparation method, the fluorine containing acrylic ester core-shell emulsion is used for carrying out composition modification on the PAE (Polyamide Epoxy chloropropane resin) so that the periphery of the emulsion particles are adsorbed and coated by macromolecules of the PAE (Polyamide Epoxy chloropropane resin) to prepare the cationization PAE (Polyamide Epoxy chloropropane resin) modified fluorinecontaining acrylic ester core-shell emulsion; the modified PAE (Polyamide Epoxy chloropropane resin) is a stable multifunctional papermaking addition agent and has the characteristic of wet-strength sizing.

Description

technical field [0001] The invention relates to a papermaking auxiliary agent, in particular to a preparation method of an anti-penetration auxiliary agent capable of enhancing stiffness and wet strength. Background technique [0002] At present, the competition in the papermaking chemicals market is relatively fierce, and various new papermaking chemicals are constantly emerging. The research focus has shifted to the development of multifunctional wet strength agents suitable for medium-alkaline papermaking. [0003] The use of two wet strength agents, urea-formaldehyde resin and melamine-formaldehyde resin, simplifies the processing process, and the wet strength can be as high as 50%. However, due to the release of certain formaldehyde during use, it pollutes the operating environment; in recent years, its application has gradually decreased, and some foreign countries have even banned it. The existing PAE resin has the advantages of high wet strength, medium-alkaline cu...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L33/08C08G59/50C08F220/18C08F220/14C08F220/22C08F2/24D21H21/20
Inventor 朱红祥王双飞穆亮夏南南穆英啸覃程荣黄崇杏王磊吴芹
Owner GUANGXI UNIV
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