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Surface sizing agent for electrostatic duplicating paper and preparation method and applications thereof

A technology of surface sizing agent and copy paper, which is applied in the direction of water repellent addition, etc., can solve the problems of little improvement in the surface strength of electrostatic copy paper, unstable paper quality, and poor paper strength, so as to improve printing adaptability, Effect of improving Cobb value and speeding up curing speed

Active Publication Date: 2013-04-17
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] A kind of sizing agent disclosed in Chinese patent CN 101148842A, although the curing speed is fast, does not improve the surface strength of electrostatic copy paper much

Method used

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  • Surface sizing agent for electrostatic duplicating paper and preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1. Preparation of surface sizing agent base material for electrostatic copy paper:

[0040] 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, drop the following mixed monomers: 100 grams of styrene, 3 grams of dimethylaminoethyl acrylate monochloromethane quaternary ammonium, 1 gram of diacetone acrylamide, 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. After filtering through a 100-mesh filter screen, the surface sizing agent base material for electrostatic copy paper was obtained, with a solid content of 39.9 wt%...

Embodiment 2

[0046] 1. Preparation of surface sizing agent base material for electrostatic copy paper:

[0047] 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 diacetone acrylamide, 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 to obtain a surface sizing agent base material for electrostatic copy paper, with a solid content of 20.1 wt%.

[0048] 2. Preparation of addi...

Embodiment 3

[0053]1. Preparation of surface sizing agent base material for electrostatic copy paper:

[0054] 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 diacetone acrylamide, 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 electrostatic copy paper, with a solid content of 30.2 wt%.

[0055] 2. Preparation of additives:

[00...

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Abstract

The invention provides a surface sizing agent for electrostatic duplicating paper and a preparation method and applications thereof. The surface sizing agent for electrostatic duplicating paper comprises the following components in parts by weight: 100 parts of base stock of surface sizing agent for electrostatic duplicating paper and 0.5-5 parts of additive. The additive is a hexanedioic acid dihydrazide and silicasol water solution, and comprises the components following parts by weight: 100 parts of hexanedioic acid dihydrazide, 5-25 parts of silicasol and 100-700 parts of water. The surface sizing agent for electrostatic duplicating paper is a high-performance and environment-friendly product which can meet paper surface sizing. The product and starch perform surface sizing to electrostatic duplicating paper together, the Cobb value of the electrostatic duplicating paper can be improved, curing is speeded up, the surface strength of the electrostatic duplicating paper can be greatly improved, the printing adaptability is improved, and the consumption of starch is reduced, thus the product can adapt to the needs of development of the electrostatic duplicating paper.

Description

technical field [0001] The invention relates to a surface sizing agent for electrostatic copy paper and a preparation method thereof. Background technique [0002] The development trend of paper, especially xerographic copy paper, 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] The sizing agent used for the above surface sizing requires: a) improving the surface strength of the paper; b) improving the printing adaptability of the paper. [0007] A sizing agent disclosed in Chinese patent CN 101148842A has a fast curing speed, but does not...

Claims

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Application Information

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Patent Type & Authority Patents(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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