A kind of high-performance cationic rosin glue and preparation method thereof

A cationic rosin glue, high-performance technology, applied in the direction of rosin addition, water repellent addition, etc., can solve the problems of difficult emulsification, not environmental protection, affecting system stability, etc., and achieve good stability effect

Active Publication Date: 2019-09-10
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to prepare stable cationic rosin glue, mainly because rosin itself is difficult to emulsify and has certain crystallization ability. It is not economical or environmentally friendly, and the high temperature method has higher requirements for emulsifiers. At the same time, rosin molecules have carboxyl groups, which are easy to produce anionic carboxylate ions, which also affects the stability of cationic dispersion systems.
In order to obtain a sufficiently stable cationic rosin gum, it is very critical to select a suitable emulsifier, and there are many related reports. In these studies, the anionic emulsifier and cationic emulsifier mentioned in the patents US5846308, US6369119, and CN1081262C are compatible with each other. However, although anionic and cationic emulsifiers have a strong synergistic effect, their interaction is too strong, making the emulsification process difficult to control, so there are some problems in the preparation of cationic rosin gum, such as the use of polymer anionic emulsifiers and When the polymer cationic emulsifier is mixed with each other, the two are easy to precipitate and co-precipitate. When the small molecule anionic emulsifier and the polymer cationic emulsifier are used together, the small molecule anionic emulsifier is easy to be freed, which affects the stability of the system.

Method used

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  • A kind of high-performance cationic rosin glue and preparation method thereof
  • A kind of high-performance cationic rosin glue and preparation method thereof
  • A kind of high-performance cationic rosin glue and preparation method thereof

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preparation example Construction

[0021] The present invention provides a method for preparing high-performance cationic rosin gum, which is characterized in that it comprises:

[0022] Step 1: Heat and melt the mixture of rosin and strengthened rosin, and keep the temperature at about 150~190℃;

[0023] Step 2: Heat the amphoteric polymer emulsifier solution to above 96°C and slowly drip it into the mixed rosin melt under stirring conditions, and continue emulsification for 10 minutes after dripping;

[0024] Step 3: Heat the cationic polymer emulsifier solution to above 96°C, slowly drip it into the mixed rosin melt, and continue to emulsify for 30 minutes after dripping;

[0025] Step 4: Heat the deionized water to above 96°C, add it slowly and then quickly to the material, and increase the stirring speed to above 1500 rpm. After the system phase changes, the stirring speed is reduced to below 100 rpm;

[0026] Step 5: Cool the emulsion quickly to below 38°C by a cooling device, then add the aluminum salt solution, s...

Embodiment 1

[0038] Heat and melt the mixture of 200g rosin and 100g fumar rosin, keeping the temperature at about 160°C; heat 25g of 20% amphoteric polymer emulsifier solution to 98°C, and slowly add dropwise to the mixed rosin melt while stirring , Continue to emulsify for 10 minutes after dripping; heat 300g of 40% cationic polymer emulsifier solution to 98°C, slowly drip into the mixed rosin melt, continue emulsification for 30 minutes after dripping; heat 590g deionized water to 98 ℃, slow and then quickly add to the material, and increase the stirring speed to 2000 rpm, after the system phase inversion, the stirring speed is reduced to 100 rpm; the emulsion is quickly cooled to 35°C by the cooling device, and then 20% aluminum is added 500g salt solution, stir evenly, adjust the pH value to 3.0 with acid, then discharge, and clean the reaction device.

Embodiment 2

[0040] Heat and melt the mixture of 200g rosin and 100g Malay rosin, keeping the temperature at about 160℃; heat 25g of 20% amphoteric polymer emulsifier solution to 98℃, and slowly add dropwise to the mixed rosin melt while stirring , Continue to emulsify for 10 minutes after dripping; heat 250g of 40% cationic polymer emulsifier solution to 98°C, slowly drip into the mixed rosin melt, continue to emulsify for 30 minutes after dripping; heat 580g deionized water to 98 ℃, slow and then quickly add to the material, and increase the stirring speed to 2000 rpm, after the system phase inversion, the stirring speed is reduced to 100 rpm; the emulsion is quickly cooled to 35°C by the cooling device, and then 20% aluminum is added 500g salt solution, stir evenly, adjust the pH value to 3.0 with acid, then discharge, and clean the reaction device.

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Abstract

The invention discloses a high-performance cationic rosin size and a preparation method thereof. The high-performance cationic rosin size is prepared by adopting an interworking emulsification system of an amphoteric polymeric emulsifier and a high-cationic-degree polymeric emulsifier and by using a normal-temperature normal-pressure phase inversion method. The preparation method is simple in preparation process and relatively small in investment, and compared with a cationic rosin size prepared by using a conventional normal-temperature normal-pressure phase inversion method, the high-performance cationic rosin size prepared by the method disclosed by the invention is not liable to bubble, relatively small in particle size and relatively good in stability.

Description

Technical field [0001] The invention belongs to the field of polymer synthesis and papermaking chemicals, and relates to a rosin gum, in particular to a high-performance cationic rosin gum and a preparation method thereof. Background technique [0002] Rosin is an extremely important papermaking aid. It is rich in resources. It not only has low sizing cost, but also can meet the sizing requirements of most paper and cardboard. Therefore, although there are many new sizing agents in the market, rosin It can still occupy a dominant position in a wide variety of sizing agents. [0003] Cationic rosin gum is currently the most widely used rosin sizing agent. It carries a positive charge and can be fixed on negatively charged fibers without relying on trivalent aluminum salt. Therefore, the amount of aluminum salt is more than that of anionic dispersed rosin gum. Because it is not restricted by aluminum salt, it can realize neutral sizing and reduce the corrosion of equipment. At pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/02C08L93/04D21H21/16D21H17/62
Inventor 施晓旦杨立滨金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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