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Surface sizing agent as well as preparation method and application thereof

A technology of surface sizing agent and dispersant, which is applied in the direction of water-repellent addition, textile and papermaking, coating, etc. It can solve the problems of dampness, slow curing, large loss, etc., and achieve the purpose of improving ring compressive strength, improving surface strength, Good water resistance effect

Inactive Publication Date: 2011-06-08
长春市筱悦印刷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a surface sizing agent for papermaking, so as to overcome the defects of slow aging, large loss and moisture return in the sizing process in the prior art, and effectively improve the ring crush strength, surface strength and sizing degree of the finished product

Method used

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  • Surface sizing agent as well as preparation method and application thereof
  • Surface sizing agent as well as preparation method and application thereof
  • Surface sizing agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Add 25kg of gelatin with a molecular weight of 20000g / mol in the reaction tank, add 500kg of deionized water, heat to 85°C with steam until the gelatin dissolves in deionized water, add 300kg of deionized water to cool down to 45°C, add 30kg of octamethyl Cyclotetrasiloxane, adding 1.5kg concentration of 25wt% 16 alkyltrimethylammonium chloride aqueous solution as an emulsifier, heating to 95°C with steam again, adding 1kg concentration of 20% ammonium persulfate by weight The aqueous solution is used as the initiator, and then other components are added sequentially, including 75kg of styrene, 3kg of dimethyl diallyl ammonium chloride, 3kg of aminopropyl acrylate, and 20kg of propyl methacrylate, and the addition is completed within 1 hour After that, keep warm at 95°C for 1 hour, cool to 35°C, and filter through a 100-mesh filter to complete 1 # The product is produced with a pH value of about 3 and a solid content of 15±1wt%.

Embodiment 2

[0048] Add 25kg of gelatin with a molecular weight of 50000g / mol in the reaction tank, add 500kg of deionized water, heat to 85°C with steam until the gelatin dissolves in deionized water, add 300kg of deionized water to cool down to 45°C, add 35kg of octamethyl Cyclotetrasiloxane, adding 1.5kg concentration of 25wt% 18 alkyltrimethylammonium chloride aqueous solution as an emulsifier, heating to 95°C with water vapor again, adding 1kg concentration of 20wt% ammonium persulfate aqueous solution as trigger Then add other components sequentially, including styrene 75kg, dimethylaminoethyl methacrylate chloride 3kg, methacrylamide 3kg, ethyl methacrylate 20kg, after adding in succession within 1 hour, Then keep warm at 95°C for 1 hour, cool to 35°C, and filter through a 100-mesh filter to complete 2 # The product is produced with a pH value of about 3 and a solid content of 15±1wt%.

Embodiment 3

[0050] Add 35kg of gelatin with a molecular weight of 20000g / mol in the reaction tank, add 500kg of deionized water, heat to 85°C with water steam until the gelatin dissolves, add 300kg of deionized water and cool down to 45°C, add 40kg of hexamethylcyclotrisiloxane alkane, adding 0.5kg concentration is 25wt% aqueous solution of 16 alkyltrimethylammonium chloride as emulsifier, water vapor heating to 95°C again, adding 0.8kg concentration is 20wt% sodium persulfate aqueous solution as initiator, and then Add other components sequentially, including 74kg of styrene, 5kg of dimethyl diallyl ammonium chloride, 1kg of glycidyl acrylate, and 15kg of isobutyl methacrylate. Insulate for 1 hour, cool to 35°C, filter through a 100-mesh filter, and complete 3 # The product is produced with a pH value of about 3 and a solid content of 15±1wt%.

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Abstract

The invention relates to a surface sizing agent as well as a preparation method and an application thereof. The surface sizing agent comprises the following components: siloxane, a cationic monomer, an acrylate monomer, a crosslinking monomer, styrene, a dispersant, an emulsifier, an initiator and deionized water. The surface sizing agent has good starch crosslinking strength and good hydrophobic property, thus paper prepared from the surface sizing agent has the advantages of better surface strength, better water resistance, better printing performance and environmental protection; and in addition, the surface sizing agent is also applicable to neutral and alkali paper, and can generate good ring crush strength on cardboard paper and corrugated paper. The surface sizing agent can fully replace an internal sizing agent, and has the advantages of less spillage, good film-forming performance, good system compatibility and the like.

Description

technical field [0001] The invention relates to a surface sizing agent for papermaking. Background technique [0002] The structure of paper fiber raw materials in my country is different from other countries in that non-wood fiber raw materials account for a large proportion, and more wood pulp also has a large content of wood secondary fibers, which makes the fibers in the pulp shorter and more miscellaneous cells , There are many types of auxiliary chemicals used. The effect of using sizing agent in the slurry is not good, and the dosage is large, and the system pollution is also difficult to control. At present, especially in the production of container board and corrugated base paper, most surface sizing agents have been used instead of internal sizing. The use of surface sizing can directly improve the ring compressive strength and surface strength, which is beneficial to the curing of sizing. At present, there are many types of surface sizing agents on the market, s...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/20C08F212/08C08F2/24
Inventor 雷得定张百友王然
Owner 长春市筱悦印刷有限公司
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