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Synthesis of paper strength enhancer and application technology thereof

A technology of paper strength and application technology, applied in the directions of reinforcing agent addition, paper, papermaking, etc., can solve the problem of not being able to greatly improve the strength of paper, and achieve the effect of improving strength and causing environmental pollution

Inactive Publication Date: 2011-05-04
王鹏
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since TDI is a small molecule, it can only generate crosslinks between fibers that are very close to each other, and cannot greatly improve the strength of paper.

Method used

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  • Synthesis of paper strength enhancer and application technology thereof
  • Synthesis of paper strength enhancer and application technology thereof
  • Synthesis of paper strength enhancer and application technology thereof

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Embodiment Construction

[0009] according to figure 1 Shown, the synthesis technique of paper strength enhancer PEG-TDI-PEG type flexible chain polymer of the present invention is: adopt toluene-2,4-diisocyanate (TDI), polyethylene glycol (PEG) as synthetic raw material, The catalyst is added under the process conditions of using dioxane as the reaction solvent, -NCO / -OH is 2:1~3:1 (molar ratio), the reaction temperature is 60~65°C, and the reaction time is 60~90min In the synthesis, 2 molecules of PEG400 react with 1 molecule of TDI to produce a paper strength enhancer PEG-TDI-PEG type flexible chain polymer.

[0010] according to figure 2 As shown, the graft copolymerization application process of PEG-TDI-PEG type flexible chain polymer of the present invention and paper fiber is: put the paper that dissolves PEG-TDI-PEG type flexible chain polymer into a vacuum drying oven , use a circulating water vacuum pump to remove the dioxane, react at 80°C for 1 hour, and then react at 120°C for 1 hour, s...

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Abstract

The invention discloses a synthesis of a paper strength enhancer and an application technology thereof. With toluene-2,4-diisocynate (TDI) and polyethylene glycol (PEG) raw materials for synthesis, PEG400 of two modules and TDI of one module react to generate a paper strength enhancer PEG-TDI-PEG type flexible chain polymer. The application technology comprises the following steps of: during application, putting paper dissolved with the PEG-TDI-PEG type flexible chain polymer into a vacuum drying oven; removing dioxane by a circulating water vacuum pump; after reacting for 1h at the temperature of 80 DEG C, reacting for 1 hour at the temperature of 120 DEG C; carrying out graft copolymerization reaction of the PEG-TDI-PEG type flexible chain polymer and paper fiber; and crosslinking the paper fiber with carbamate. The invention has the beneficial effect on greatly improving paper strength, bringing no environmental pollution, and providing a wider prospect for paper in the agriculture and industry production, such as packaging, buildings and the like.

Description

Technical field [0001] The invention relates to a strength enhancer for plant fiber net materials such as paper, in particular to the synthesis and application technology of a paper strength enhancer capable of greatly improving the strength of paper. Background technique [0002] Currently known strength enhancers for plant fiber reticular materials such as paper, one is to use non-reactive chemical additives such as polyacrylamide and modified chitosan. Since the bond energy of hydrogen bonds is relatively small, this type of chemical additive The hydrogen bond cross-linking between the fibers formed by the agent is not strong enough, especially it is easily destroyed by water, so it has little effect on the improvement of the wet strength; the second is to use urea-formaldehyde resin (UF) and melamine-formaldehyde resin (MF) ) and other chemical additives that can cross-link with cellulose to improve the wet strength of paper. When using these resins, formaldehyde will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18D21H17/55C08G18/48C08G18/76
Inventor 王鹏黄德义谢益民范建云
Owner 王鹏