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A preparation method of special network gel modified talc powder for papermaking

A special network, talc technology, applied in chemical instruments and methods, inorganic compound addition, inorganic chemistry, etc., can solve problems such as adverse effects on paper performance and strength indicators, increase the number, improve flexibility and strength, and avoid damage. Effect

Active Publication Date: 2017-06-13
JIANGSU QUNXIN POWDER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the amount of modified talcum powder increases, it will also have a certain degree of adverse effects on the paper performance, especially the strength index.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Put 100 parts by weight of talcum powder with a fineness of 1200~2000 mesh into the single-screw extruder, and add 0.5 parts by weight of sodium hexametaphosphate and 5 parts by weight of sodium carboxymethylcellulose to modify the surface. As an additive, set the screw speed at 200-300 r / min, the extruding temperature at 100-120°C, and extrude for 5-10 minutes to obtain surface-modified talc powder;

[0022] (2) Put the surface-modified talc powder obtained in step (1) into the reaction kettle, add water and stir to form a dispersion liquid, add 5 parts by weight of vinyl acetic acid and 5 parts by weight of methylene bisacrylamide and mix and stir, add 0.15 Parts by weight of aluminum glycylate cross-linking agent and 0.05 parts by weight of azobisisobutylamidine hydrochloride initiator are stirred and reacted at 80-100°C for 40-60 minutes, and the monomers are polymerized to form a three-dimensional polymer network gel. Interspersed and coated in the layered stru...

Embodiment 2

[0025] (1) Put 100 parts by weight of talc powder with a fineness of 1200~2000 mesh into the single-screw extruder, and add 1 part by weight of sodium hexametaphosphate and 5 parts by weight of sodium lignosulfonate for surface modification agent, set the screw speed at 200-300 r / min, the extruding temperature at 100-120°C, and extrude for 5-10 minutes to obtain surface-modified talc powder;

[0026] (2) Put the surface-modified talc powder obtained in step (1) into a reaction kettle, add water and stir to form a dispersion liquid, add 10 parts by weight of styrene sulfonate and 10 parts by weight of hydroxyethyl acrylate and mix and stir, Add 0.2 parts by weight of aluminum glycylate crosslinking agent and 0.1 parts by weight of azobisisopropylimidazoline hydrochloride initiator, stir and react at 80~100°C for 40~60min, and the monomers are polymerized to form a three-dimensional polymer network Shaped gel, interspersed and coated in the layered structure of talc powder to ob...

Embodiment 3

[0029] (1) Put 100 parts by weight of talcum powder with a fineness of 1200~2000 mesh into the single-screw extruder, and add 0.5 parts by weight of sodium hexametaphosphate and 3 parts by weight of sodium dodecylsulfonate in proportion to the surface As a modifier, set the screw speed at 200-300 r / min, the extruding temperature at 100-120°C, and extrude for 5-10 minutes to obtain surface-modified talc powder;

[0030] (2) Put the surface-modified talcum powder obtained in step (1) into a reaction kettle, add water and stir to form a dispersion, add 5 parts by weight of vinyl acetic acid, 5 parts by weight of hydroxyethyl acrylate and 5 parts by weight of Mix and stir vinyl acetate, add 0.1 weight part of aluminum glycinate crosslinking agent and 0.05 weight part of azobisisopropylimidazoline hydrochloride initiator, stir and react at 80~100°C for 40~60 min, monomer Polymerize to form a three-dimensional polymer network gel, which is interspersed and coated in the layered stru...

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Abstract

The invention belongs to the field of inorganic mineral powder papermaking, and in particular relates to a preparation method of network gel modified talcum powder specially used for papermaking. It is characterized in that the flexible nano talc powder is formed by interspersing talcum powder, surface modifier and three-dimensional polymer network gel according to the weight ratio of 100:1~5:10~20. The modified talc powder uses extrusion technology to make the surface modifier penetrate into the layered structure of the talc powder, improve the hydrophilicity and surface activity of the talc powder, and polymerize with the flexible monomer under the action of the crosslinking agent to form a Three-dimensional network polymer gel, the network gel is interspersed in the layered structure of the modified talc powder, which increases the strength and toughness of the talc powder, and at the same time increases the active groups on the surface of the modified talc powder, improving the performance of the modified talc powder. Excellent softness and dispersibility, increase the bonding force between modified talcum powder and plant fiber. When the modified talcum powder of the present invention is used in papermaking, the softness of paper can be obviously improved, and the paper has good hand feeling, light weight and is easy to print.

Description

technical field [0001] The invention belongs to the field of inorganic mineral fibers, in particular to a preparation method of network gel-modified talc powder specially used for papermaking. Background technique [0002] Paper and its products are indispensable consumer goods in people's daily work, and the paper industry also plays an important role in the global economy and civilization. Ordinary paper is made of plant fibers, and wood is the main raw material of plant fibers. Therefore, a large number of trees need to be cut down to produce paper. my country is a country lacking forest resources, and a large amount of chemicals such as acids, alkalis, and bleaching powder are used in the papermaking process. It is difficult to recycle raw materials and waste liquid and prevent pollution, which brings serious pollution to the environment and affects human life and ecological balance. Therefore, it is of great significance to seek new non-plant fiber substitutes. my coun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/69D21H17/68C01B33/20C08F292/00C08F220/04C08F222/38C08F212/14C08F220/28C08F218/08
CPCD21H17/68D21H17/69C01B33/20C08F292/00C08F220/281C08F212/14
Inventor 张国如蒋建平
Owner JIANGSU QUNXIN POWDER TECH CO LTD
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