A kind of copolymer and its preparation method and application
A technology of copolymers and thiourea derivatives, which is applied in the preparation of copolymers and in the field of copolymers, can solve the problems of unsuitable scale and corrosion inhibitors for circulating water, and achieve good corrosion inhibition effects, great economic benefits and social benefits Effect
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[0028] The preparation method of the copolymer provided by the present invention includes: mixing monomers, initiators and molecular weight regulators at 50-95°C, and continuing to react at 75-95°C for 1-4h, wherein the monomer Including thiourea derivatives, unsaturated carboxylic acids, unsaturated sulfonic acids and amine compounds.
[0029] In the present invention, the dosage and specific selection of thiourea derivatives, unsaturated carboxylic acids, unsaturated sulfonic acids and amine compounds as monomers are as described above, and will not be repeated here.
Embodiment approach
[0030] According to a preferred embodiment of the present invention, the mixing mode is:
[0031] (a) the solution of the monomer and the solution of the initiator are respectively added dropwise to the solution of the molecular weight regulator, or
[0032] (b) adding dropwise the solution of the monomer and the solution of the molecular weight regulator into the solution of the initiator respectively, or
[0033] (c) The solution of the initiator is added dropwise to the mixed solution of the molecular weight regulator and the monomer.
[0034] In the mixing mode (a), (b) or (c), there is no particular requirement on the rate of addition. For example, in mode (a), the dropping rate of the monomer solution is 30-400 mL / h, and the dropping rate of the initiator solution is 5-120 mL / h. In mode (b), the dropping rate of the solution of the monomer is 30-400 mL / h, and the dropping rate of the solution of the molecular weight modifier is 5-120 mL / h. In the way (c), the dropping r...
Embodiment 1
[0055] Add 1.2 g of ammonium persulfate and 30 ml of water to a four-necked flask equipped with a stirrer, a reflux condenser, a constant pressure dropping funnel and a thermometer, and start stirring to fully dissolve the ammonium persulfate. Add allylthiourea 18.4g, methylene succinic acid 18g, AMPS 12g, dimethyl diallyl ammonium chloride 20g and 90ml water in a constant pressure dropping funnel, shake well; Add 1.2g of sodium metabisulfite and 20ml of water into the pressure dropping funnel, shake well; start to heat up, and when the temperature rises to 50°C, start to drop the liquid in the two constant pressure dropping funnels, while continuing to raise the temperature to 80°C ℃, control the rate of addition so that the liquid in the two constant pressure dropping funnels is added dropwise within 1 hour, then continue the insulation reaction for 2 hours, stop the test, and cool to obtain the product. The solid content of the product is 30.4%.
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