High branch cationic starch for papermaking wet end and preparation method thereof

A cationic starch and cationic etherification technology, which is applied in papermaking, textiles, papermaking, paper, etc., can solve the problems that the product type and quality cannot fully meet the market demand, so as to maintain the same strength of paper strength, improve performance, and improve paper quality. The effect of force strength

Inactive Publication Date: 2011-04-20
NANCHANG UNIV
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Moreover, the variety and quality of domest

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  • High branch cationic starch for papermaking wet end and preparation method thereof
  • High branch cationic starch for papermaking wet end and preparation method thereof

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Embodiment 1

[0028] Embodiment 1, the preparation method of high amylopectin cationic starch for wet end of papermaking is characterized in that: it is made of the following raw materials in parts by weight: 30-60 parts of tapioca starch and 40-70 parts of water go through cationic etherification step and crosslinking reaction step and drying and crushing step to obtain;

[0029] The cationic etherification step is as follows: stir tapioca starch and water evenly, then heat up to 25-40°C, add sodium hydroxide to adjust the pH value to 10.8-11.2, and add 6%-8% of the total weight of tapioca starch and water 3-Chloro-2-hydroxypropyltrimethylammonium chloride, react at 36-40°C for 12-20 hours, and maintain the pH at 10.8-11.2 during the reaction;

[0030] The cross-linking reaction step is: lower the temperature to 30°C, add phosphorus oxychloride at 0.03%-0.2% of the total weight of tapioca starch and water, maintain the pH at 10.8-11.2 during the reaction, maintain a constant temperature of...

Embodiment 2

[0032] Embodiment 2, high amylopectin cationic starch for papermaking wet end and preparation method thereof, wherein: made from the following raw materials in parts by weight: 30 parts of tapioca starch and 50 parts of water go through cationic etherification step and crosslinking reaction step and drying and milling Obtained by crushing steps;

[0033] The cationic etherification step is as follows: stir tapioca starch and water evenly and then heat up to 25°C, add sodium hydroxide to adjust the pH value to 10.8, add 3-chloro-2-hydroxyl to 6% of the total weight of tapioca starch and water Propyltrimethylammonium chloride, reacted at 36°C for 12 hours, and maintained the pH at 10.8 during the reaction;

[0034]The cross-linking reaction step is: lower the temperature to 30°C, add phosphorus oxychloride according to 0.2% of the total weight of tapioca starch and water, maintain the pH at 10.8-11.2 during the reaction, maintain a constant temperature of 30°C, and react 1 under...

Embodiment 3

[0036] Embodiment 3, the preparation method of highly amylopectin cationic starch for the wet end of papermaking, wherein: it is made of the following raw materials in parts by weight: 50 parts of tapioca starch and 50 parts of water go through cationic etherification step, crosslinking reaction step and drying and crushing step to obtain;

[0037] The cationic etherification step is as follows: stir tapioca starch and water evenly, then heat up to 30°C, add sodium hydroxide to adjust the pH value to 11, add 3-chloro-2-hydroxyl to 7% of the total weight of tapioca starch and water Propyltrimethylammonium chloride, reacted at 38°C for 17 hours, and maintained the pH at 11 during the reaction;

[0038] The cross-linking reaction step is as follows: cool down to 30°C, add phosphorus oxychloride at 0.03% of the total weight of tapioca starch and water, maintain pH at 11 during the reaction, maintain a constant temperature of 30°C, and react for 1 hour under stirring. All the othe...

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Abstract

The invention provides high branch cationic starch for a papermaking wet end and a preparation method thereof. The high branch cationic starch comprises the following raw materials in parts by weight: 30-60 parts of arrow root starch and 40-70 parts of water, and is prepared through a cationic etherification step, a cross-linking reaction step and a drying step. The high branch cationic starch isadded into paper to improve the paper force strength of the paper or to maintain the paper force strength under the condition of improving the primary retention rate and the ash content of the paper.The preparation method provided by the invention benefits the control of the influence of cross-linking degree for starch molecular weight in the synthesis technology of the high branch cationic starch, and the diminishment of the increased scope of the cross-linking degree so as to improve the starch molecular weight to the most extent. The result of combinedly using phosphorus oxychloride, sodium trimetaphosphate and epoxy chloropropane as a cross-linking agent is better than the result of singly using the phosphorus oxychloride as the cross-linking agent. The high branch cationic starch isapplicable to papermaking enterprises which produce cultural paper and are equipped with continuous digesters.

Description

technical field [0001] The invention provides a highly branched cationic starch for papermaking, in particular a highly branched cationic starch for wet end of papermaking and a preparation method thereof. Background technique [0002] my country's modified starch industry started late, and its production capacity was low. Before 2000, the annual domestic output of modified starch was below 200,000 tons. Domestic consumption was highly dependent on imports, with an import dependence rate of more than 30%. Moreover, the variety and quality of domestic products cannot fully meet market demand. Over 3,000 varieties of modified corn starch have been developed abroad, while less than 100 varieties have been developed in my country. At present, the most effective use of modified starch is highly branched cationic starch. The cationic starch used in the "Compozil" retention and drainage system of papermaking is a kind of highly branched cationic starch, and its molecular weight is...

Claims

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Application Information

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IPC IPC(8): C08B31/08C08J3/24C08K3/32C08L3/08D21H17/29D21H21/10
Inventor 罗明辉蔡建信邓燕芳周华田建文
Owner NANCHANG UNIV
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