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Preparation method of cross-linked resin paper waterproofing agent

A cross-linking and waterproofing agent technology, which is applied in the direction of water-repellent addition, papermaking, paper coating, etc., can solve the problems of increasing impurities, affecting the effect of sizing agent in the pulp, and increasing the amount of sizing agent in the pulp. Improve the waterproof effect and make up for the loss of sizing effect

Pending Publication Date: 2020-06-05
苏州派凯姆新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of papermaking technology and in response to the requirements of national environmental protection policies, secondary fiber raw materials are used in large quantities, and the white water closed system causes a large increase in anions and other impurities that affect the use of papermaking chemicals. A series of problems, among which the effect of the sizing agent in the slurry is seriously affected, resulting in a sharp increase in the amount of the sizing agent in the slurry, which increases the cost of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment example 1

[0024] Preparation of the first dropwise mixed monomer A1

[0025] Add 35g of deionized water, 2g of n-dodecyl mercaptan, 60g of styrene, 50g of n-butyl acrylate, and 0.2g of nonylphenol polyoxyethylene ether into a container with a stirrer in sequence, and mix , turn on the stirrer, set the rotation speed to 200r / min, stir for 30 minutes, and set aside after the stirring is completed.

[0026] Add 250g of water and 40g of cassava starch to a 1L three-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen inlet tube, and turn on the stirrer to mix evenly. After mixing evenly, raise the temperature to 90°C. After the temperature was stabilized at 90°C, 0.05g of α-amylase was added, and at a temperature of 90°C, the reaction was incubated for 20 minutes. After the incubation reaction was completed, 10g of glacial acetic acid and 0.5g of ferrous sulfate heptahydrate were added. temperature, make the temperature stable at 90°C, start dropwise addi...

specific Embodiment example 2

[0028] Preparation of the first dropwise mixed monomer A2

[0029] The deionized water of 35g, the n-dodecyl mercaptan of 2.3g, the styrene of 80g, the n-butyl acrylate of 50g, the nonylphenol polyoxyethylene ether of 0.4g add in the container that stirrer is loaded successively, Turn on the stirrer, set the rotating speed to 200r / min, stir for 30 minutes, and set aside after the stirring is completed. Add 250g of water and 40g of cassava starch to a 1L three-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen inlet tube, turn on the stirrer and mix well. After mixing evenly, heat up to 90°C, and when the temperature After stabilizing at 90°C, add 0.05g of α-amylase, and keep it warm for 20 minutes at 90°C, add 10g of glacial acetic acid and 0.7g of ferrous sulfate heptahydrate after the heat preservation reaction is over, and control the temperature , to stabilize the temperature at 90°C, start to drop the first drop of mixed monomer A2, t...

specific Embodiment example 3

[0031] Preparation of the first dropwise mixed monomer A3

[0032] The deionized water of 35g, the n-dodecyl mercaptan of 2.2g, the styrene of 70g, the n-butyl acrylate of 50g, the nonylphenol polyoxyethylene ether of 0.3g are added in the container that stirrer is carried successively, Turn on the stirrer, set the rotating speed to 200r / min, stir for 30 minutes, and set aside after the stirring is completed.

[0033]Add 250g of water and 40g of cassava starch to a 1L three-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen inlet tube, turn on the stirrer and mix well. After mixing evenly, heat up to 90°C, and when the temperature After stabilizing at 90°C, add 0.05g of α-amylase, and keep it warm for 20 minutes at 90°C, add 10g of glacial acetic acid and 0.7g of ferrous sulfate heptahydrate after the heat preservation reaction is over, and control the temperature , to stabilize the temperature at 90°C, start to add dropwise the first drop...

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PUM

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Abstract

Along with the development of papermaking technology, meanwhile, the requirements of national environmental protection policies are also responded; a large amount of secondary fiber raw materials areused, the use ratio of national waste is greatly increased, anions and other impurities influencing the use effect of papermaking chemicals are greatly increased due to a white water closed system, the effect of an internal sizing agent is certainly worsened, the use amount of the internal sizing agent is increased, and the enterprise cost is increased; in order to make up the loss caused by the sizing effect. Reducing enterprise production costs, starting from the molecular structure design of the surface sizing agent, through deep research, the cross-linked styrene-acrylic polymer emulsion is provided, and the cross-linked styrene-acrylic polymer emulsion can form a tighter water-resistant film layer on the surface of paper, so that the waterproof effect of the paper is improved, and thesizing effect loss of the sizing agent in pulp is made up.

Description

technical field [0001] The invention relates to the field of papermaking chemicals, and more specifically, relates to a preparation method of a crosslinked resin paper waterproofing agent. Background technique [0002] Paper waterproofing agent can be divided into waterproofing agent for pulp and surface sizing, such as emulsion of alkyl ketene dimer (AKD emulsion), alkenyl succinic anhydride emulsion (ASA emulsion), etc., waterproofing agent for surface sizing The main additives are starch and its modified products, carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), styrene-acrylic emulsion (SAE), styrene maleic anhydride polymer, etc. [0003] Among these waterproofing agents for paper, styrene-acrylic paper sizing agent (SAE) has been favored and recognized by the paper industry since its inception. This is because the styrene-acrylic surface sizing agent has good film-forming properties due to its special molecular structure, thereby forming a water-resistant film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F212/08C08F220/18C08F220/34C08J3/24C08L51/02D21H19/14D21H19/20D21H21/16
CPCC08F251/00C08J3/24D21H21/16D21H19/14D21H19/20C08J2351/02C08F212/08C08F220/34
Inventor 张新东轩少云
Owner 苏州派凯姆新能源科技有限公司