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Preparation method of Gemini emulsifier used for producing cationic rosin size

A cationic rosin gum and emulsifier technology, which is applied in the direction of rosin addition and water repellent addition, can solve the problems that the stability and emulsification ability of cationic rosin gum emulsion cannot be taken into account, the HLB value of emulsifier is single, and the stability is not good. , to achieve excellent stability, good sizing performance and fine particle size

Inactive Publication Date: 2017-10-10
SHANGHAI DONGSHENG NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious common shortcomings in the above prior art: the HLB value (Hydrophile Lipophilic Balance) of the synthetic emulsifier is single, and the stability and emulsifying ability of the cationic rosin gum emulsion cannot be taken into account
[0004] The cationic rosin gum emulsion obtained in the prior art often has a series of defects such as insufficient particle size, large foam, and poor stability. One of today's R&D hotspots

Method used

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  • Preparation method of Gemini emulsifier used for producing cationic rosin size
  • Preparation method of Gemini emulsifier used for producing cationic rosin size
  • Preparation method of Gemini emulsifier used for producing cationic rosin size

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preparation example Construction

[0025] The first aspect of the present invention provides a kind of preparation method for the production of the gemini emulsifier of cationic rosin size, and described preparation method comprises the following steps:

[0026] (1) Dissolve cationic surfactant, nonionic surfactant and molecular weight regulator in a part of alcoholic solvent, mix well to obtain mixed solution I; add a part of alcoholic solvent to the reaction kettle, and then add the mixed solution I;

[0027] (2) Dissolving the rosin monomer, the hydrophobic group monomer and the hydrophilic group monomer in a part of the alcoholic solvent, and mixing uniformly to obtain a mixed solution II; and raising the temperature of the reaction kettle to 78-97°C, and Add the mixed solution II and the aqueous solution of the initiator dropwise into the reaction kettle, and keep the reaction for 3 to 5 hours;

[0028] (3) After the heat preservation reaction is complete, add distilled water to adjust the solid content t...

Embodiment 1

[0042] Add 50g of ethanol to the reactor, then add mixed solution I (50g of ethanol solution of 50g of dimethyl diallyl ammonium chloride, 30g of OP-10 and 8g of dodecanethiol); the reactor is heated to 78°C, Then add the mixed solution II (70g ethanol solution of 50g rosin monomer, 25g butyl acrylate, and 60g acrylamide) and an aqueous solution containing 5g ammonium persulfate dropwise at the same time, and keep warm for 4 hours; after the reaction is completed, add appropriate amount of distilled water to adjust the solid content It can be discharged after reaching 32%, and the twin emulsifier 1 is obtained.

Embodiment 2

[0044]Add 40g of isopropanol to the reaction kettle, and then add the mixed solution I (50g of diethyl diallyl ammonium chloride, 15g of AEO-9 and 6g of sodium formate in 20g of isopropanol solution); the reaction kettle is heated to 83°C , then drop the mixed solution II (40g isopropanol solution of rosin monomer 50g, styrene 10g, acrylamide 58g) and aqueous solution containing 3g sodium persulfate at the same time, keep warm for 3.5 hours; after the reaction is completed, add appropriate amount of distilled water to adjust After the solid content reaches 36%, it can be discharged to obtain Gemini emulsifier 2.

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Abstract

The invention discloses a preparation method of a Gemini emulsifier used for producing cationic rosin size. The method comprises the following steps: adding a cationic surface active agent, a non-ionic surface active agent, a molecular weight regulator and an alcohol solvent into a reaction kettle; raising a temperature to 78-97 DEG C; adding a rosin monomer, a hydrophobic group monomer, a hydrophilic group monomer and an initiating agent; performing a heat-preservation reaction for 3-5 hours; when the reaction is completed, adding distilled water to adjusting the solid content to 30%-40%; and performing product discharging to obtain the Gemini emulsifier used for producing cationic rosin size. The invention also provides the Gemini emulsifier prepared by the method. The Gemini emulsifier has a moderate HLB value, and also has good stability, dispersity and emulsifying ability. The Gemini emulsifier can be used to prepare high quality cationic rosin size with fine particles, small bubbles, high whiteness, and good sizability.

Description

technical field [0001] The invention belongs to the related fields of polymer synthesis and papermaking industry, and relates to a preparation method of an emulsifier, in particular to a preparation method of a gemini emulsifier used for producing cationic rosin gum. Background technique [0002] Cationic rosin size is an important raw material in the paper industry. Because it has the advantages of abundant resources and low sizing cost, it is currently the most widely used rosin sizing agent; in addition, it carries positive charges and fixes itself on negatively charged fibers, greatly reducing the amount of sulfuric acid. The amount of aluminum used, and neutral sizing can be achieved. [0003] However, because rosin has a special structure, contains a large number of carboxyl groups, has a high melting point, and is easy to crystallize, it is not easy to form a stable cationic rosin gum emulsion. For this reason, the solution in the prior art is generally to increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/56C08F220/28C08F220/34C08F226/02C08F220/18C08F212/08C08F220/14C08F226/10D21H21/16D21H17/62
CPCD21H17/62D21H21/16C08F289/00C08F220/281C08F220/34
Inventor 施晓旦王虎金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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