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Surface sizing agent for paperboard and preparation method thereof

A surface sizing agent and cardboard technology, applied in the direction of water repellent addition, etc., can solve the problems of unstable paper quality, large amount of sizing agent, and difficulty in improving the grade, so as to reduce the Cobb value, reduce the dosage, and reduce the grammage. heavy effect

Active Publication Date: 2011-04-13
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) Use waste paper instead of wood pulp, but the strength of the paper is poor and the water absorption value is high
[0005] 3) Due to the many variable factors of internal sizing, the paper quality is unstable and the grade is difficult to improve, which makes manufacturers use less or give up internal sizing and use surface sizing to make up for it has become a popular trend
[0007] However, although the current surface sizing agent can improve the ring compressive strength of the cardboard, the amount of sizing agent is large and the cost is high.

Method used

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  • Surface sizing agent for paperboard and preparation method thereof
  • Surface sizing agent for paperboard and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1. Preparation of surface sizing agent base material for cardboard:

[0045] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 20 grams of gelatin with a molecular weight of 10000 g / mol and 214.5 grams of deionized water, heat up to 85°C to dissolve, then cool down to 45°C. Add 2 grams of 25wt% octadecyl polyoxyethylene (15) trimethylammonium chloride aqueous solution, heat to 95°C, add 1.5 grams of 20wt% ammonium persulfate aqueous solution, add dropwise the following mixed monomers: 100 grams of styrene, 3 grams of dimethylaminoethyl acrylate monochloromethane quaternary ammonium, 1 gram of N-butoxymethacrylic acid, and 20 grams of n-butyl acrylate were added in 1 hour. The reaction was maintained at 95°C for 1 hour, cooled to 35°C, pH = 2.0. Filter through a 100-mesh filter screen to obtain a surface sizing agent base material for cardboard, with a solid content of 39.9 wt%.

[0046] 2. Preparation of catio...

Embodiment 2

[0053] 1. Preparation of surface sizing agent base material for cardboard:

[0054]Add 50 grams of gelatin with a molecular weight of 100,000 g / mol and 808 grams of deionized water into a 2000ml four-neck flask equipped with a condenser, a dropping device, a stirrer, and a thermometer, heat up to 85°C to dissolve, and cool down to 45°C. Add 20 grams of 10wt% lauryl polyoxyethylene (20) trimethylammonium chloride aqueous solution, add 4 grams of 50wt% potassium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of methyl styrene, methacrylic acid 8 grams of acyloxyethyltrimethylammonium chloride, 5 grams of divinylbenzene, and 40 grams of isooctyl methacrylate were added in 6 hours. The reaction was maintained at 40°C for 2 hours, cooled to 25°C, pH=5.85. Filter through a 100-mesh filter screen to obtain a surface sizing agent base material for cardboard, with a solid content of 20.1 wt%.

[0055] 2. Preparation of cationic additives:

[0056] 1) A...

Embodiment 3

[0062] 1. Preparation of surface sizing agent base material for cardboard:

[0063] In a 1000ml four-neck flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 35 grams of gelatin with a molecular weight of 80000g / mol and 395.3 grams of distilled water, and heat up to 85°C to dissolve. Cool down to 45°C. Add 10 grams of 10 wt% tetradecyl polyoxyethylene (8) trimethylammonium chloride aqueous solution, heat to 60 ° C, add 5 grams of 20 wt % sodium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of styrene, 5 grams of diallyl dimethyl ammonium chloride, 3 grams of aminoethyl acrylate, and 30 grams of methyl methacrylate were added in 4 hours. The reaction was maintained at 60°C for 2 hours, cooled to 35°C, pH = 3.5. Filter through a 100-mesh filter to obtain a surface sizing agent base material for cardboard, with a solid content of 30.2 wt%.

[0064] 2. Preparation of cationic additives:

[0065] 1) Add 90g of par...

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Abstract

The invention discloses a surface sizing agent for a paperboard as well as a preparation method and application thereof. The surface sizing agent for the paperboard comprises the following components in part by weight: 100 parts of surface sizing agent base stocks for the paperboard, and 5-10 parts of cationic additives. The surface sizing agent for the paperboard can be used for the surface treatment of white board body paper. The surface sizing agent for the paperboard is a high-performance and environmental-protection product capable of meeting the requirement of the high-performance and environmental protection products for paper surface sizing. When the product conducts surface sizing on the white board body paper together with starch, the surface sizing agent can greatly improve the Cobb value of the paperboard, accelerate the curing speed, reduce the dosage of the starch, and can meet the requirement on the development of the high-strength paperboard.

Description

technical field [0001] The invention relates to a surface sizing agent for cardboard and a preparation method thereof. Background technique [0002] The development trend of paper, especially cardboard is as follows: [0003] 1) It is developing from high grammage to low grammage. [0004] 2) Use waste paper instead of wood pulp, but the strength of the paper is poor and the water absorption value is high. [0005] 3) Due to the unstable quality of paper caused by many variable factors in internal sizing, and the difficulty of improving the grade, it has become a popular trend for manufacturers to use less or abandon internal sizing and use surface sizing to make up for it. [0006] Requirements for the sizing agent used for the above-mentioned surface sizing: a) increase the ring compressive strength; b) greatly reduce the Cobb value (water absorption value); c) fast curing speed, and it is required to be cooked immediately after getting off the machine. [0007] However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 施晓旦尹东华王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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