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Dry intensifier for paper making, and preparation method and application thereof

A technology of dry strength agent and oxidant, which is applied in papermaking, reinforcing agent addition, textiles and papermaking, etc. It can solve the problems of product storage stability deterioration, need to be improved, and low stability, etc., to achieve enhanced enhancement effect, enhanced effect, powerful effect

Active Publication Date: 2013-04-03
HUNAN BAILIN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cross-linked acrylamide dry strength agent does not have high product stability after introducing active groups, especially the storage stability of the product becomes poor.
Therefore, the effect and storage stability of existing dry strength agents to enhance paper strength still need to be improved

Method used

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  • Dry intensifier for paper making, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 738kg of deionized water, 166.8kg of acrylamide monomer (AM), 16kg of dimethyl diallyl ammonium chloride (DMDAAC), 7kg of acrylic acid, 6.7kg of methyl etherified methylol acrylamide monomer, 1.5kg Polyethylene glycol dimethacrylate, with a total monomer weight of 198kg, was made into a solution, and the pH value was adjusted to about 3-5, then 195g of sodium bisulfite was added, stirred and dissolved, and nitrogen gas was passed for 30 minutes for later use. 18% by weight of the monomer solution was added to the reactor as a kettle material, and the remaining monomer solution was added to the dripping tank 1 as a dripping solution for subsequent use.

[0022] Add 390g of ammonium persulfate into 65kg of water to form a solution, and add it to the dropping tank 2.

[0023] The temperature of the reactor material was raised to 40° C., and the solutions in the tanks 1 and 2 were started to be added dropwise. It is required to finish dripping in 180min. After the d...

Embodiment 2

[0025] Weigh 738 kg of deionized water, 166.8 kg of acrylamide monomer (AM), 16 kg of dimethyl diallyl ammonium chloride (DMDAAC), 7 kg of acrylic acid, 8 kg of methyl etherified methylol acrylamide monomer, 1.5 kg of poly Ethylene glycol dimethacrylate, a total of 199.3kg of monomers, made into a solution, adjusted the pH value to about 3-5, then added 195g of sodium bisulfite, stirred and dissolved, and passed nitrogen gas for 30 minutes for later use. 15% by weight of the monomer solution was added to the reactor as a kettle material, and the remaining monomer solution was added to the dripping tank 1 as a dripping solution for subsequent use.

[0026] Add 390g of ammonium persulfate into 65kg of water to form a solution, and add it to the dropping tank 2.

[0027] The temperature of the reactor material was raised to 40° C., and the solutions in the tanks 1 and 2 were started to be added dropwise. It is required to finish dripping in 180min. After the dropwise addition w...

Embodiment 3

[0029] Weigh 738kg of deionized water, 166.8kg of acrylamide monomer (AM), 16kg of dimethyl diallyl ammonium chloride (DMDAAC), 7kg of acrylic acid, 8kg of butylated methylolacrylamide monomer, 1.5kg of poly Ethylene glycol dimethacrylate, a total of 199.3kg of monomers, made into a solution, adjusted the pH value to about 3-5, then added 195g of sodium bisulfite, stirred and dissolved, and passed nitrogen gas for 40 minutes for later use. 20% by weight of the monomer solution is added to the reaction kettle as a kettle material, and the remaining monomer solution is added to the dropping tank 1 as a dropping solution for subsequent use.

[0030] Add 390g of ammonium persulfate into 65kg of water to form a solution, and add it to the dropping tank 2.

[0031] The temperature of the reaction kettle was raised to 35° C., and the solution in the dropping tanks 1 and 2 was started to be added dropwise. It is required to finish dripping in 180min. After the dropwise addition was ...

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Abstract

The invention relates to a dry intensifier for paper making, and a preparation method and application thereof. Based on the weigh of the dry intensifier, the dry intensifier comprises the following raw materials in percentage by mass: 15-20% of acrylamide monomer, 1-1.6% of cationic monomer, 0.6-1% of anionic monomer, 0.1-0.3% of polyene monomer, 0.6-1.8% of etherified hydroxymethyl acrylamide, 0.03-0.05% of oxidizer, 0.01-0.03% of reducer and the balance of deionized water. According to the method provided by the invention, by controlling the addition of the crosslinking agent, cations and anions, a branched high molecular compound is generated on the main chain of a polymer, thereby improving the fiber binding power of the dry intensifier and enhancing the intensifying effect. The etherified hydroxymethyl acrylamide can be adapted to the dry intensifier system having a high molecular weight, and the stability of the product can be kept. The dry intensifier provided by the invention has high intensifying effect on paper and has enough storage stability itself.

Description

technical field [0001] The invention relates to a dry strength agent, in particular to a dry strength agent for papermaking and a preparation method and application thereof. Background technique [0002] The strength of paper is affected by many factors, first of all depends on the fiber bonding force in the paper and the strength of the fiber itself, as well as the arrangement and distribution of the paper fibers. The most important thing is the bonding force between fibers. There are generally four types of fiber bonding force: chemical bond, hydrogen bond, van der Waals force and surface interweaving force. Among them, the hydrogen bonding force is the main way to produce the paper bonding strength. There are many hydroxyl groups in cellulose molecules, and the hydrogen bonds formed by countless microfibers are very strong, which is also the main reason for the dry strength. Most of the natural and synthetic dry strength agents are hydrophilic polymers, which increase t...

Claims

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Application Information

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IPC IPC(8): D21H21/18D21H17/45C08F220/56C08F226/02C08F220/34C08F220/06C08F222/02C08F228/02C08F220/58C08F222/38C08F222/14C08F212/36C08F4/40
Inventor 雷得定孙睢州
Owner HUNAN BAILIN BIOLOGICAL TECH
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