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Carboxymethyl starch sizing agent and preparation method thereof

A carboxymethyl starch and sizing agent technology, which is applied in the direction of water repellent addition, inorganic compound addition, paper, etc., can solve the problems of poor low temperature stability of sizing agents, lower paper quality, low surface strength, etc., and achieve good low temperature Stabilization, strength-enhancing effects

Active Publication Date: 2014-06-18
SUZHOU HENGKANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problems to be solved: conventional sizing agents have poor low-temperature stability, and the surface strength of paper prepared in the paper industry is too low, which reduces the quality of paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of preparation method of carboxymethyl starch sizing agent, preparation method comprises the following steps: (1) take carboxymethyl starch at room temperature to be 9kg, drop into reaction kettle, then add castor oil phosphate to be 7kg, deionized water to be 185kg, mechanical stirring, the stirring speed is 150rpm, stirring until the solution is fully emulsified and uniform; (2) Add 5 kg of polyethylene glycol, 3 kg of gelatin, 7 kg of methyl propylene glycol, and 4 kg of potassium carbonate into the reaction kettle, and carry out mechanical stirring again. Stirring, the stirring speed is 150rpm, and the time is 15min; (3) The mixed liquid in the reaction kettle is sheared with a high-speed shearing machine, the shearing speed is 3000rpm, and the shearing time is 20min; The temperature of the glue is lowered to room temperature and stored.

Embodiment 2

[0014] A kind of preparation method of carboxymethyl starch sizing agent, preparation method comprises the following steps: (1) get carboxymethyl starch at room temperature to be 11kg, put into reaction kettle, then add castor oil phosphate to be 8kg, deionized water is 190kg, mechanical stirring, the stirring speed is 150rpm, stirring until the solution is fully emulsified and uniform; (2) Add 4 kg of polyethylene glycol, 4 kg of gelatin, 7 kg of methyl propylene glycol, and 2 kg of potassium carbonate into the reaction kettle, and carry out mechanical stirring again. Stirring, the stirring speed is 150rpm, and the time is 15min; (3) The mixed liquid in the reaction kettle is sheared with a high-speed shearing machine, the shearing speed is 3500rpm, and the shearing time is 20min; The temperature of the glue is lowered to room temperature and stored.

Embodiment 3

[0016] A kind of preparation method of carboxymethyl starch sizing agent, preparation method comprises the following steps: (1) take carboxymethyl starch at room temperature to be 10kg, put into reaction kettle, then add castor oil phosphate to be 6kg, deionized water is 187kg, mechanical stirring, the stirring speed is 150rpm, stirring until the solution is fully emulsified and uniform; (2) Add 5 kg of polyethylene glycol, 6 kg of gelatin, 8 kg of methyl propylene glycol, and 3 kg of potassium carbonate into the reaction kettle, and carry out mechanical stirring again. Stirring, the stirring speed is 150rpm, and the time is 15min; (3) The mixed liquid in the reaction kettle is sheared with a high-speed shearing machine, the shearing speed is 4000rpm, and the shearing time is 20min; (4) After the shearing, it is to be applied The temperature of the glue is lowered to room temperature and stored.

[0017] The carboxymethyl starch sizing agents of Example 1, Example 2, and Examp...

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Abstract

The invention relates to a carboxymethyl starch sizing agent and a preparation method thereof. The carboxymethyl starch sizing agent is prepared from the following components in parts by weight: 9-11 parts of carboxymethyl starch, 4-5 parts of polyethylene glycol, 3-6 parts of gelatin, 7-8 parts of methylpropanediol, 2-4 parts of potassium carbonate, 6-8 parts of castor oil phosphate, and 185-190 parts of deionized water. The preparation method of the carboxymethyl starch sizing agent comprises the following steps: mixing, agitating, shearing and cooling. The prepared carboxymethyl starch sizing agent has good low-temperature stability, and the surface strength of paper can be obviously improved.

Description

technical field [0001] The invention relates to a sizing agent and a preparation method thereof, in particular to a carboxymethyl starch sizing agent which has good low-temperature stability and can improve the surface strength of paper and a preparation method thereof. Background technique [0002] In the paper industry, processing aids have a greater impact on the quality of finished paper, and sizing agents are also very important paper processing aids. There are many types of sizing agents, including rosin type sizing agents, paraffin type sizing agents, and starch type sizing agents, among which starch type sizing agents are more and more widely used. At present, most starch-based sizing agents are modified starch sizing agents, which are used in papermaking processes. [0003] Due to the unreasonable composition and distribution ratio of conventional starch-based sizing agents, the low-temperature stability of prepared starch-based sizing agents is poor, which needs t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/28D21H17/06D21H17/66D21H17/10D21H17/33
Inventor 邓强
Owner SUZHOU HENGKANG NEW MATERIALS
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