Method for preparing high-substitution-degree cation starch emulsifier

A technology of cationic starch and non-ionic emulsifier, applied in chemical instruments and methods, chemical/physical processes, transportation and packaging, etc., can solve problems such as poor stability, achieve low cost, good water resistance and storage stability, and disperse good sex effect

Active Publication Date: 2014-03-26
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, industrial AKD is emulsified with cationic starch and surfactant, which has poor stability and can only be stored stably for about one month at room temperature.

Method used

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  • Method for preparing high-substitution-degree cation starch emulsifier
  • Method for preparing high-substitution-degree cation starch emulsifier

Examples

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Embodiment Construction

[0021] The preferred embodiments of the present invention are given below to describe the technical solution of the present invention in detail.

[0022] Example 1

[0023] Add 185g of deionized water, 4g of sorbitan monooleate (Span 80), 1g of α-amylase and 100g of cornstarch into a four-necked flask equipped with a condenser, agitator, and a thermometer, heat up to 60°C, and keep warm 1h, add slow solvent anhydrous sodium sulfate 5g under stirring, add sodium hydroxide with a weight concentration of 32% until the pH of the solution is 11.0, add 10g of water to another beaker to dissolve 7g of 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride, then added to the starch milk, reacted for 4 hours, cooled to 30°C, adjusted the pH of the system to 4.0 with hydrochloric acid, and the measured substitution degree was 0.311. 

[0024] Example 2

[0025] Add 150g of deionized water, 10g of polyethylene oxide (20), 1g of β-amylase and 100g of cornstarch into a four-necked flask...

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Abstract

The invention discloses a method for preparing a high-substitution-degree cation starch emulsifier. The method comprises the following steps: mixing starch, an emulsifier, amylase and water to obtain starch milk, heating to 45-60 DEG C, preserving heat for 0.5-2 hours, adding a solution slowing agent while stirring, and adding a catalyst; adding a cation etherifying agent aqueous solution, reacting for 4-7 hours, and adjusting the pH of a system to 2.0-4.0 with a neutralizing agent to obtain the high-substitution-degree anion starch emulsifier. The method for preparing the high-substitution-degree cation starch emulsifier has the advantages of simple process, mild reaction conditions and low cost; the prepared high-substitution-degree cation starch emulsifier is high in substitution degree and dispersity, is used for emulsifying an alkyl ketene dimer (AKD), and has the advantages of stronger fiber bonding force, higher water resistance and higher storage stability when compared with an ordinary AKD emulsion.

Description

technical field [0001] The invention relates to a method for preparing cationic starch emulsifier with high degree of substitution, which is applied to emulsifying alkyl ketene dimer (AKD).  Background technique [0002] In 1948, Sauer first synthesized AKD. Downoy developed AKD emulsion for paper sizing in 1952. Tyrreily, wemer, etc. used AKD for the first time with CaCO 3 Paper sizing agent for filler. In 1956, Herecules Corporation of the United States built a factory and put into production AKD. In 1957, it began to supply AKD latex (trade name "Aquapel"), and it was first used in the production of high-quality paper and canned milk cardboard in 1957 and 1960. However, because chemicals such as retention aids and cationic starch had not been invented at that time, the stability of the emulsion was poor, and the retention rate of the size was low, so it was not widely used. In 1972, Hercules launched the cationic AKD neutral glue in Europe. Its retention rate in pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00B01F17/00C09K23/00
Inventor 施晓旦沈安成尹东华王养臣
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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