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Preparation method of novel papermaking sizing agent

A sizing agent, a new type of technology, used in papermaking, textiles and papermaking, paper, etc., can solve the problems of water resistance, unsatisfactory AKD, environmental and safety hazards, and achieve good sizing effect, heat resistance and other problems. Good water effect and good waterproof effect

Inactive Publication Date: 2018-06-29
石家庄德旺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production and application, it brings a lot of inconvenience, there will be false sizing or the expected water resistance effect will not be achieved
In addition, due to the low melting point of AKD wax itself, it has poor anti-hot water and moisture-proof effects.
In addition, because the production process requires acylation and the use of phosgene, the product is accompanied by the generation of waste acid, which has great potential hazards to the environment and safety.
Under the urgent requirements of national environmental protection and safety, as the papermaking process gradually changes from internal pulp sizing to surface sizing, AKD cannot meet the current needs

Method used

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  • Preparation method of novel papermaking sizing agent
  • Preparation method of novel papermaking sizing agent
  • Preparation method of novel papermaking sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Take 60 g of stearic acid, 2 g of diethanolamine, and 6 g of diethylenetriamine, react at 140° C. for 6 hours, cool down to 110° C., and obtain a reaction feed liquid, which is set aside;

[0037] B. Take 100g of water and 3g of cationic cornstarch. After mixing, gelatinize at 90°C for 1 hour, cool down to 50°C to obtain gelatinized starch liquid, add 5g of the reaction material liquid obtained in step A to the gelatinized starch liquid, and add compound surface active Add 0.2g of epichlorohydrin dropwise, add 3g of epichlorohydrin dropwise, heat up to 70°C, keep warm for 5 hours, add 5g of water, cool down to room temperature, and obtain a white emulsion, which is the papermaking sizing agent.

[0038] Wherein the composite surfactant is alkylphenol polyoxyethylene ether and cetyltrimethylammonium bromide with a mass ratio of 1:1.

Embodiment 2

[0040] A. Take 70g of stearic acid, 3g of diethanolamine, and 7g of diethylenetriamine, react at 220°C for 4h, cool down to 120°C, and obtain the reaction feed liquid, which is set aside;

[0041] B. Take 100g of water and 10g of polyamide epichlorohydrin resin, mix and heat up to 50°C to obtain a mixed solution, add 14g of the reaction material solution obtained in step A to the mixed solution, add 1g of composite surfactant, and dropwise add epoxy chlorine Add 5g of propane, raise the temperature to 70°C, keep it warm for 2 hours, add 5g of water, cool down to room temperature, and obtain a white emulsion, which is the paper-making sizing agent.

[0042] Wherein the composite surfactant is OP-10 and cetyltrimethylammonium chloride with a mass ratio of 3:2.

Embodiment 3

[0044] A. Take 80g of stearic acid, 2.5g of diethanolamine, and 8g of diethylenetriamine, react at 180°C for 5h, cool down to 115°C, and obtain the reaction feed liquid, which is set aside;

[0045] B. Take 100g of water and 6g of cationic tapioca starch. After mixing, gelatinize at 90°C for 1 hour, cool down to 45°C to obtain gelatinized starch liquid, add 7g of the reaction material liquid obtained in step A to the gelatinized starch liquid, and add compound surface active Add 0.5g of epichlorohydrin dropwise to 7g of epichlorohydrin, heat up to 70°C, keep warm for 2.5 hours, add 5g of water, cool down to room temperature, and obtain a white emulsion, which is the paper-making sizing agent.

[0046] Wherein the composite surfactant is T-40 and cetyltrimethylammonium chloride with a mass ratio of 2:3.

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Abstract

A preparation method of a novel papermaking sizing agent belongs to the technical field of papermaking sizing agents and includes the steps of: A) preparing raw materials including, by weight, 60-80 parts of stearic acid, 2-3 parts of diethanolamine, and 6-14 parts of diethylenetriamine, and performing a reaction at 140-220 DEG C for 4-6 h, cooling the product to obtain a reaction material liquidfor later use; B) mixing 100 parts by weight of water and 2-10 parts by weight of starch, gelatinizing the starch, cooling the liquid to 50 DEG C to obtain gelatinized starch liquid, or mixing 100 parts by weight of water and 0.5-10 parts of a high-polymer, heating the mixture to 50 DEG C to prepare a mixture liquid; C) adding 5-14 parts of the reaction material liquid in the step A) to the gelatinized starch liquid or the mixture liquid, adding 0.2-1 part of a compound surfactant and dropwise adding 3-10 parts of epoxy chloropropane, heating the mixture to 70 DEG C and performing heat-insulation reaction for 2-5 h, adding 5 parts of water, and cooling the mixture to produce the papermaking sizing agent. The preparation method has simple operations and has gentle and stable reaction processes. The papermaking sizing agent has good sizing effect and better damp-proof effect, and can satisfy demands in process of papermaking with waste pulp.

Description

technical field [0001] The invention belongs to the technical field of paper-making sizing agents, and designs a novel paper-making sizing agent-cationic stearamide emulsion, in particular to a preparation method of a novel paper-making sizing agent. The preparation method of the present invention is simple and easy to operate, and the reaction in the preparation process is mild and stable. The sizing agent prepared by the method of the present invention has good sizing effect and better moisture-proof effect, and the prepared sizing agent plays a role in strengthening the bonding force between fibers. It has a certain effect and is more suitable for the needs of the current waste paper pulp papermaking. Background technique [0002] Sizing agent is an important wet-end chemical. my country is now developing and applying paper-making sizing agents on a large scale. Before the 1980s, saponified rosin sizing agents and fortified rosin prepared by maleic anhydride addition were...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H17/14D21H17/07D21H17/28D21H17/29D21H17/11D21H21/24D21H17/55D21H17/54D21H17/45
CPCD21H17/07D21H17/11D21H17/14D21H17/28D21H17/29D21H17/45D21H17/455D21H17/54D21H17/55D21H21/16D21H21/24
Inventor 王晴
Owner 石家庄德旺科技有限公司
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