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Preparation method for high-molecular surfactant

A surfactant and polymer technology, applied in the field of surfactant preparation, can solve the problems of unfavorable long-term storage and production application, the increase of ASA emulsion particles, unfavorable ASA sizing, etc., and achieve the reduction of interfacial tension and good emulsification effect , easy adsorption effect

Inactive Publication Date: 2015-11-25
TIANHE CHEM SUZHOU CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN102892832 mentions a method of using aldehyde-functionalized polymers to improve paper machine performance and enhance sizing. The patent uses DADMAC and acrylamide to prepare copolymers, which are then hydroformylated with glyoxal to obtain polymer surfactants , used in the ASA surface sizing process, but it will cause the ASA emulsion particles to increase, which is not conducive to the sizing of ASA
[0004] Both Chinese patents CN101688370 and CN101778873 mentioned that a glyoxalated polyacrylamide with high solid content is used as an ASA emulsifier, which can effectively improve the dehydration efficiency of papermaking, but the shelf life of the product is short, only 45 days to 60 days. Good for long-term storage and production applications
[0011] Yu Dehai used sodium fluoride modified bentonite with negative charge as inorganic solid particle emulsifier, successfully prepared a stable ASA emulsion according to the Pickering emulsion stability theory, and also successfully realized the compounding of modified bentonite / magnesium aluminum hydroxide The modified bentonite / chitosan compound is used to emulsify ASA, the resulting emulsion is more stable, but the emulsion can only maintain a good sizing effect within 30 minutes, and the sizing effect of the emulsion drops sharply after being stored for 1 hour

Method used

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  • Preparation method for high-molecular surfactant
  • Preparation method for high-molecular surfactant
  • Preparation method for high-molecular surfactant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: a kind of preparation method of macromolecule surfactant, comprises the following steps:

[0041] Step 1. Mix sodium phosphate, 50% polyacrylamide aqueous solution, dimethylaminoethyl methacrylate (DMAM) and water evenly,

[0042] Step 2, heating the mixture obtained in step 1 to 35~45°C;

[0043] Step 3, add cyclohexanone peroxide dropwise to the mixture obtained in step 2, and add dropwise for 15 minutes;

[0044] Step 4. Gradually heat up the mixture obtained in Step 3 to 60-70°C, and keep the temperature at 60-70°C for 4 hours;

[0045] Step five, add epichlorohydrin to step four, and keep warm at 60~70°C for 130 minutes,

[0046] Step 6. Cool down to 20~25°C, and discharge to obtain polymer surfactant;

[0047] The polymeric surfactant obtained was prepared into an alkenyl succinic anhydride (ASA) emulsion to illustrate the use effect of the polymeric surfactant.

[0048] Preparation of alkenyl succinic anhydride (ASA) emulsion:

[0049] Add a cert...

Embodiment 2

[0056] Embodiment 2: other conditions are with example 2 in embodiment 1, and difference is to change the consumption of dimethyl diallyl ammonium chloride, and concrete data see table 2;

[0057] Prepare alkenyl succinic anhydride (ASA) emulsion, method is with embodiment 1, and concrete data sees table 2.

[0058] Table 2: Effect of the amount of dimethyl diallyl ammonium chloride on product quality

[0059]

[0060] The data in Table 2 shows that when the ratio of polyacrylamide aqueous solution and dimethylaminoethyl methacrylate is 5:1, the yield of emulsifier obtained is the highest, the value of COBB120S is the smallest, and the water resistance effect is the best.

Embodiment 3

[0061] Embodiment 3: other conditions are with example 2 in embodiment 1, difference is to change reaction temperature, investigate the impact of temperature change on product quality, concrete data see table 3;

[0062] Prepare alkenyl succinic anhydride (ASA) emulsion, method is with embodiment 1, and concrete data sees table 3.

[0063] Table 3: Effect of Temperature on Product Quality

[0064] serial number temperature / ℃ Product mass / g Yield / % Viscosity / COBB120S 11 50-60℃ 438 94.8% 10 32.5 12 60-70℃ 453 98.1% 15 27.2 13 70-80℃ 450 97.4% 24 29.8

[0065] The data in Table 3 shows that when the holding temperature is 60-70°C, the yield of the obtained emulsifier is the highest, the COBB120S value is the smallest, and the water resistance effect is the best.

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Abstract

The invention relates to a preparation method for a high-molecular surfactant. The method comprises the following steps: uniformly mixing sodium phosphate, polyacrylamide aqueous solution, diallyldimethylammonium chloride and water to form a mixture, wherein the mass ratio of the polyacrylamide aqueous solution to the cationic monomer is 20-5:1; heating the mixture obtained in the step 1 to 30-50 DEG C; dropwise adding cyclohexanone peroxide into the mixture obtained in the step 2; gradually heating the mixture obtained in the step 3 to 55-95 DEG C, and keeping warm at 55-95 DEG C for 4 h; and step 4, adding a cyclic ether compound into the system obtained in the step 4, keeping warm at 50-80 DEG C for 120-150 min, cooling to 20-25 DEG C, and discharging so as to obtain the high-molecular surfactant. The obtained high-molecular surfactant possesses extremely high activity, relatively high solid content and relatively good stability, and is applicable to preparation of alkyl ketene dimmers (AKD), alkenyl succinic anhydride (ASA) and other papermaking chemical emulsions.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to a preparation method of a surfactant used as a sizing emulsifier in papermaking. Background technique [0002] Alkenyl succinic anhydride (ASA) and alkyl ketene dimer (AKD) are two reactive neutral / alkaline sizing agents commonly used in papermaking. However, ASA and AKD are insoluble in water and can only be uniformly dispersed after emulsification. Dispersed in the paper material system; at the same time, it is easily hydrolyzed, so it must be emulsified on site before adding, and the emulsification technology has become an important factor affecting its sizing performance, which requires an efficient surfactant to promote ASA and emulsification of AKD. [0003] Chinese patent CN102892832 mentions a method of using aldehyde-functionalized polymers to improve paper machine performance and enhance sizing. The patent uses DADMAC and acrylamide to prepare copolymers, which a...

Claims

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Application Information

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IPC IPC(8): C08G65/26C08F265/10C08F226/02C08F220/34C08F8/08D21H21/16
Inventor 徐敏张新东韦伟乔凯曹国良
Owner TIANHE CHEM SUZHOU CO LTD
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