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Micromolecular amphoteric polymer papermaking reinforcing agent and preparation method thereof

A technology of amphoteric polymers and paper-making reinforcing agents, which is applied in the field of paper-making reinforcing agents. It can solve the problems of high cost of use, increased fiber length, and small fiber pores, and achieve high cost of use, enhanced hydrogen bonding, and reduced The effect of usage

Inactive Publication Date: 2020-06-12
SNF CHINA FLOCCULANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the small pores of paper fibers, and the limitation of fiber length increase and insufficient strengthening ability of common cationic polymer reinforcing agents during use, and the high cost of using other products, a new type of small molecule amphoteric polymer reinforcement was developed. It is of great significance to improve the strength and toughness of paper and reduce the cost

Method used

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  • Micromolecular amphoteric polymer papermaking reinforcing agent and preparation method thereof
  • Micromolecular amphoteric polymer papermaking reinforcing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) Preparation of modified carboxymethyl cellulose CMC

[0021] Accurately weigh 85g of epichlorohydrin and 15g of CMC (bamboo fiber), add them into a three-necked flask with a stirrer, heat to 70°C in a constant temperature water bath, stir at a constant temperature of 300r / min for 10min, and then remove from the dropping funnel Add a few drops of ammonia water, adjust the pH value of the system to 8, adjust the rotating speed to 600r / min, continue to stir and react for 2 hours, then add a few drops of acrylic acid from the dropping funnel, adjust the pH value of the system to 5, stop stirring, and obtain epoxy modified Sexual carboxymethyl cellulose.

[0022] (2) Preparation of Small Molecule Amphoteric Polymer Papermaking Strengthening Agent

[0023] Accurately weigh 30g of modified carboxymethyl cellulose (heated to 60°C to dissolve), 60g of acrylamide, 80g of DMC, 25g of N,N-dimethylacrylamide and 5g of maleic acid, mix well in a 500mL beaker, and add to a three-...

Embodiment 2

[0027] (1) Preparation of modified carboxymethyl cellulose CMC

[0028] Accurately weigh 85g of epichlorohydrin and 15g of CMC (bamboo fiber), add them into a three-necked flask with a stirrer, heat to 70°C in a constant temperature water bath, stir at a constant temperature of 300r / min for 10min, and then remove from the dropping funnel Add a few drops of ammonia water, adjust the pH value of the system to 8, adjust the rotating speed to 600r / min, continue to stir and react for 2 hours, then add a few drops of acrylic acid from the dropping funnel, adjust the pH value of the system to 5, stop stirring, and obtain epoxy modified Sexual carboxymethyl cellulose.

[0029] (2) Preparation of Small Molecule Amphoteric Polymer Papermaking Strengthening Agent

[0030] Accurately weigh 40g of modified carboxymethyl cellulose (heated to 60°C to dissolve), 50g of acrylamide, 70g of DMC, 30g of N,N-dimethylacrylamide and 10g of maleic acid, mix them evenly in a 500mL beaker, and add the...

Embodiment 3

[0034] (1) Preparation of modified carboxymethyl cellulose CMC

[0035] Accurately weigh 85g of epichlorohydrin and 15g of CMC (bamboo fiber), add them into a three-necked flask with a stirrer, heat to 70°C in a constant temperature water bath, stir at a constant temperature of 300r / min for 10min, and then remove from the dropping funnel Add a few drops of ammonia water, adjust the pH value of the system to 8, adjust the rotating speed to 600r / min, continue to stir and react for 2 hours, then add a few drops of acrylic acid from the dropping funnel, adjust the pH value of the system to 5, stop stirring, and obtain epoxy modified Sexual carboxymethyl cellulose.

[0036] (2) Preparation of Small Molecule Amphoteric Polymer Papermaking Strengthening Agent

[0037] Accurately weigh 35g of modified carboxymethyl cellulose (heated to 60°C to dissolve), 55g of acrylamide, 75g of DMC, 25g of N,N-dimethylacrylamide and 10g of maleic acid, mix well in a 500mL beaker, and add to a three...

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Abstract

The invention discloses a micromolecular amphoteric polymer papermaking reinforcing agent and a preparation method thereof. Acrylamide and methacryloyloxyethyl trimethyl ammonium chloride are taken aspolymerization main bodies, N,N-dimethylacrylamide and maleic acid are introduced for quaternary copolymerization, modified carboxymethyl cellulose is introduced, and the reinforcing agent is synthesized under the action of a composite redox initiation system. Weak anions in the micromolecular amphoteric polymer papermaking reinforcing agent can increase the length of paper fibers, meanwhile, self-made modified carboxymethyl cellulose is introduced to improve the dispersing capacity of polymer molecular branched chains in the paper fibers, and formed hydrogen bonds can improve the binding force between all layers of the fibers to improve the paper strength and the fiber retention rate; and the small-molecular amphoteric polymer papermaking reinforcing agent contains many active groups, sothat the hydrogen bond binding force is enhanced, the overall performance of the product is improved, the use amount can be greatly reduced, and the use cost is saved.

Description

technical field [0001] The invention relates to the technical field of paper-making strengthening agents, in particular to a small-molecule amphoteric polymer paper-making strengthening agent and a preparation method thereof. Background technique [0002] At present, the widely used strengthening agent in the paper industry is the natural starch derivative, but due to its unstable performance, easy aging and poor adhesion, it needs further improvement. With the development of science and technology, the research on synthetic polymer paper-making strengthening agent is gradually in-depth, because its molecular structure contains more active groups, which can form stable hydrogen bonds with the hydroxyl groups on the surface of cellulose to improve the strength of paper. Therefore, polymer-based reinforcing agents have become the focus of research at this stage. In view of the small pores of paper fibers, and the limitation of fiber length increase and insufficient strengthen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/56C08F220/54C08F222/02C08F220/34D21H17/45D21H21/18
CPCC08F251/02D21H17/455D21H21/18C08F220/34
Inventor 谢克敏凌静高军尼古拉斯布瓦斯
Owner SNF CHINA FLOCCULANT