A kind of preparation method of cationic water-soluble polymer aqueous dispersion without stabilizer

Abstract

The invention discloses a preparation method of a stabilizer-free cationic water-soluble polymer aqueous dispersing liquid. Monomers are stirred in water, dissolved, heated to 20-70 DEG C and polymerized under the action of an initiator, wherein the weight ratio of the monomers to water is (1:1)-(1:9); the monomers comprise water-soluble cationic monomers. The monomers are matched with a polymerization condition synergistically, no inorganic salt is added in the polymerization process, no polymer stabilizers are added, the production cost is low, the content of effective solids in the water-soluble polymer dispersing liquid is high, the water-soluble polymer aqueous dispersing liquid can be used for white water recycling in the papermaking industry, waste water treatment in the printing and dyeing industry and the building material industry and can also be applied in occasions where inorganic salt and polymer stabilizers are forbidden, such as ore dressing, thickening of cosmetics, reinforcement of high-grade paper and the like, and the application field of the cationic water-soluble polymer aqueous dispersing liquid is broadened.

Description

technical field

[0001] The present invention relates to a new method for preparing cationic water-soluble polymer aqueous dispersion, that is to say, there is no need to add inorganic salt or polymer stabilizer in the preparation process. Background technique

[0002] Cationic water-soluble polymers have become the most widely used synthetic water-soluble polymers in the world. They are widely used in many fields such as sewage treatment, oil exploration, papermaking, textile printing and dyeing, mineral processing, and soil improvement. Industrial monosodium glutamate" and other reputation.

[0003] At present, the industrial production methods of cationic water-soluble polymers include aqueous solution polymerization, inverse emulsion polymerization and inverse suspension polymerization. Each of these methods has its own advantages, but there are some insurmountable problems. Aqueous solution polymerization is currently the most important production method for cationic wa...

Examples

Embodiment 1

[0029] Weigh 200g of acrylamide, 200g of methacryloyloxyethyltrimethylammonium chloride, and 400g of deionized water, pour them into a 1000mL jacketed reactor equipped with a stirrer and a thermometer, start nitrogen, heat up and stir , rotate at 150 rpm, wait for it to completely dissolve and heat up to 50°C, add 0.02g VA044 initiator, react for 12 hours, then add 0.02g VA044 initiator, and react for another 12 hours to obtain a uniform milky dispersion.

Embodiment 2

[0031] Weigh 60g of acryloyloxyethyl dimethyl benzyl ammonium chloride, 20g of methacryloyl oxyethyl dimethyl benzyl ammonium chloride, 720g of deionized water, pour into a 1000mL container equipped with a stirrer and a thermometer In the jacketed reactor, start to pass nitrogen, heat up and stir, and the speed is 10 rpm. After it is completely dissolved and heated to 40°C, add a redox initiator composed of 0.44g potassium persulfate and 0.2g sodium sulfite, and react for 0.5 After h, a homogeneous milky dispersion was obtained.

Embodiment 3

[0033]Weigh 40g of acrylamide, 40g of methacrylamide, 120g of acryloyloxyethyltrimethylammonium chloride, and 600g of deionized water, pour them into a 1000mL jacketed reactor equipped with a stirrer and a thermometer, and start to pass nitrogen , heat up and stir, the speed is 50 rpm, until it is completely dissolved and the temperature is raised to 20°C to be constant, add a redox initiator composed of 0.14g ammonium persulfate and 0.06g sodium bisulfite, and react for 8 hours to obtain a uniform milky Dispersions.

technical field

[0001] The present invention relates to a new method for preparing cationic water-soluble polymer aqueous dispersion, that is to say, there is no need to add inorganic salt or polymer stabilizer in the preparation process. Background technique

[0002] Cationic water-soluble polymers have become the most widely used synthetic water-soluble polymers in the world. They are widely used in many fields such as sewage treatment, oil exploration, papermaking, textile printing and dyeing, mineral processing, and soil improvement. Industrial monosodium glutamate" and other reputation.

[0003] At present, the industrial production methods of cationic water-soluble polymers include aqueous solution polymerization, inverse emulsion polymerization and inverse suspension polymerization. Each of these methods has its own advantages, but there are some insurmountable problems. Aqueous solution polymerization is currently the most important production method for cationic wa...

Examples

Embodiment 1

[0029] Weigh 200g of acrylamide, 200g of methacryloyloxyethyltrimethylammonium chloride, and 400g of deionized water, pour them into a 1000mL jacketed reactor equipped with a stirrer and a thermometer, start nitrogen, heat up and stir , rotate at 150 rpm, wait for it to completely dissolve and heat up to 50°C, add 0.02g VA044 initiator, react for 12 hours, then add 0.02g VA044 initiator, and react for another 12 hours to obtain a uniform milky dispersion.

Embodiment 2

[0031] Weigh 60g of acryloyloxyethyl dimethyl benzyl ammonium chloride, 20g of methacryloyl oxyethyl dimethyl benzyl ammonium chloride, 720g of deionized water, pour into a 1000mL container equipped with a stirrer and a thermometer In the jacketed reactor, start to pass nitrogen, heat up and stir, and the speed is 10 rpm. After it is completely dissolved and heated to 40°C, add a redox initiator composed of 0.44g potassium persulfate and 0.2g sodium sulfite, and react for 0.5 After h, a homogeneous milky dispersion was obtained.

Embodiment 3

[0033]Weigh 40g of acrylamide, 40g of methacrylamide, 120g of acryloyloxyethyltrimethylammonium chloride, and 600g of deionized water, pour them into a 1000mL jacketed reactor equipped with a stirrer and a thermometer, and start to pass nitrogen , heat up and stir, the speed is 50 rpm, until it is completely dissolved and the temperature is raised to 20°C to be constant, add a redox initiator composed of 0.14g ammonium persulfate and 0.06g sodium bisulfite, and react for 8 hours to obtain a uniform milky Dispersions.