Search

CN-122011745-A - Environment-friendly polyurethane elastomer well site cofferdam

CN122011745ACN 122011745 ACN122011745 ACN 122011745ACN-122011745-A

Abstract

The environment-friendly polyurethane elastomer wellsite cofferdam comprises, by weight, 60-65 parts of matrix polyurethane resin, 15-18 parts of chain extender, 6-8 parts of plasticizer and 10-15 parts of tea polyphenol-dimethylglyoxime type polyurethane resin coating. The well site cofferdam prepared by the technical scheme of the invention has excellent corrosion resistance and tensile resistance.

Inventors

  • RONG ZHENJUN
  • NAN CHANGAN

Assignees

  • 河南省金启橡塑有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (10)

  1. 1. The environment-friendly polyurethane elastomer wellsite cofferdam is characterized by comprising, by weight, 60-65 parts of matrix polyurethane resin, 15-18 parts of chain extender, 6-8 parts of plasticizer and 10-15 parts of tea polyphenol-dimethylglyoxime type polyurethane resin coating; the tea polyphenol-dimethylglyoxime type polyurethane resin coating comprises sulfhydryl silicon dioxide modified plant fibers and lanthanum-compounded tea polyphenol-chitosan modified substances.
  2. 2. The environmental-friendly polyurethane elastomer wellsite cofferdam as set forth in claim 1, wherein the preparation method of the tea polyphenol-dimethylglyoxime type polyurethane resin coating is as follows: The preparation method comprises the following steps of S1, according to parts by weight, stirring 14-16 parts of dimethylglyoxime type polyurethane resin, 3-5 parts of sulfhydryl silicon dioxide modified plant fiber, 0.1-0.15 part of benzoin dimethyl ether and 0.2-0.25 part of p-toluenesulfonic acid at a high speed, stirring uniformly, carrying out ultraviolet irradiation while stirring, cooling to 50 ℃ and curing for 1 hour, and carrying out vacuum drying to obtain modified dimethylglyoxime type polyurethane resin; And S2, mixing 4-5 parts of tea polyphenol-chitosan modified substance with 8-10 parts of modified dimethylglyoxime type polyurethane resin according to parts by weight to obtain the tea polyphenol-dimethylglyoxime type polyurethane resin coating.
  3. 3. The environment-friendly polyurethane elastomer wellsite cofferdam as claimed in claim 2, wherein the preparation method of the tea polyphenol-chitosan modifier is characterized in that lanthanum chloride with the mass of 0.5-1 times of that of tea polyphenol is added into 5 parts by weight of 10% tea polyphenol solution, the mixture is uniformly mixed, the pH is regulated to 6-8, the mixture is heated at room temperature for reaction for 1-2 hours, and the mixture is centrifuged, washed and dried and dispersed into chitosan-glacial acetic acid solution, and the tea polyphenol-chitosan modifier is obtained after uniform stirring.
  4. 4. The environmental-friendly polyurethane elastomer wellsite cofferdam as claimed in claim 2, wherein the preparation method of the dimethylglyoxime type polyurethane resin comprises the following steps of reacting, by weight, 7-7.5 parts of polytetrahydrofuran glycol, 2-2.5 parts of isophorone diisocyanate, 2-2.5 parts of dimethylglyoxime, 0.1-0.3 part of dibutyltin dilaurate and 0.8-1 part of hydroxyethyl acrylate at 80 ℃ for 2 hours, adding 0.6-0.8 part of trimethylolpropane and 2-2.5 parts of dimethylglyoxime for crosslinking reaction, and drying to obtain the dimethylglyoxime type polyurethane resin.
  5. 5. The environmental protection polyurethane elastomer wellsite cofferdam of claim 2, wherein the preparation method of the mercapto silica modified plant fiber is characterized in that 1-2 parts of nano silica is dispersed into water according to parts by weight, uniformly stirred, 10-12 parts of pretreated plant fiber is added, 2-3 parts of 2-chloroethanethiol is added, the temperature is raised to 65-70 ℃, the reaction is carried out for 1h, cooling, filtering and drying are carried out, and the mercapto silica modified plant fiber is obtained.
  6. 6. The environment-friendly polyurethane elastomer wellsite cofferdam as set forth in any one of claims 1-5, wherein the preparation method of the polyurethane elastomer wellsite cofferdam is as follows: Dehydrating 80-85 parts of polyether polyol at 100-110 ℃ according to parts by weight, cooling to 40-50 ℃, adding 60-80 parts of diisocyanate, reacting at 80-85 ℃ for 2-2.5 hours under nitrogen atmosphere to obtain matrix polyurethane resin, adding 80-85 ℃ of tea polyphenol-dimethylglyoxime type polyurethane resin coating, stirring for 2 hours, vacuum defoaming, cooling and discharging to obtain polyurethane elastomer prepolymer; A2, mixing and stirring the polyurethane elastomer prepolymer, the chain extender and the plasticizer uniformly, degassing, and placing the mixture into a grinding tool for cold press molding to obtain the elastomer well site cofferdam.
  7. 7. The environmental protection type polyurethane elastomer well site cofferdam as set forth in claim 6, wherein said polyether polyol is at least one of polytetrahydrofuran glycol, polyethylene glycol, polypropylene oxide polyol, and has a number average molecular weight of 2000-3000.
  8. 8. The environmental protection polyurethane elastomer wellsite cofferdam of claim 6, wherein said diisocyanate comprises more than one of 1, 6-hexamethylene diisocyanate, triisocyanatononane, toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI) and isophorone diisocyanate.
  9. 9. The environmental protection polyurethane elastomer wellsite cofferdam of claim 6, wherein the chain extender is one or more than two of di-o-chloroaniline methane, dimethyl thiotoluene diamine, diethyl toluenediamine, 2, 4-diamino-3, 5-dimethyl thiochlorobenzene and 2, 4-diamino-3-methylthio-5-propyl chlorobenzene.
  10. 10. The environmental protection polyurethane elastomer wellsite cofferdam of claim 6, wherein the plasticizer is at least one of dioctyl adipate, dioctyl sebacate, tolyldiphenyl phosphate, diphenylisodecyl phosphate and tri-n-butyl acetyl citrate.

Description

Environment-friendly polyurethane elastomer well site cofferdam Technical Field The invention belongs to the technical field of elastomers, and particularly relates to an environment-friendly polyurethane elastomer well site cofferdam. Background The oilfield well site cofferdam is an environment-friendly device for collecting and isolating oily water generated in the operation process and preventing pollutants from diffusing, is generally made of metal or composite materials, replaces the traditional impermeable mulching film, can be reused, and reduces the generation of solid waste. Glass fiber reinforced plastic products are frequently selected on the selection of cofferdam materials, the glass fiber reinforced plastic products are high in preparation cost on the one hand, and the glass fiber reinforced plastic cofferdam is high in structural strength but high in brittleness on the other hand, so that the glass fiber reinforced plastic well site cofferdam is easy to break in use, and pollution and treatment cost are caused by sewage outflow. Compared with the glass fiber reinforced plastic well site cofferdam, the polyurethane elastomer well site cofferdam has lower maintenance cost and impact resistance when being used for a long time, and can realize customized requirements and splicing due to scenes, but the polyurethane elastomer well site cofferdam is also deficient in acid and alkali corrosion resistance, so that the polyurethane elastomer well site cofferdam is improved to meet the requirements. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides an environment-friendly polyurethane elastomer well site cofferdam. (II) technical scheme In order to achieve the above purpose, the invention is realized by the following technical scheme: The environment-friendly polyurethane elastomer wellsite cofferdam comprises, by weight, 60-65 parts of matrix polyurethane resin, 15-18 parts of chain extender, 6-8 parts of plasticizer and 10-15 parts of tea polyphenol-dimethylglyoxime type polyurethane resin coating. Further, the preparation method of the tea polyphenol-dimethylglyoxime type polyurethane resin coating comprises the following steps: S1, adding 0.5 part of tea polyphenol into distilled water according to parts by weight, stirring, dissolving and preparing, adding 0.8mol.L -1 of lanthanum chloride solution, uniformly mixing, adjusting the pH to 6-8 by using sodium hydroxide solution, heating at room temperature for reaction for 1-2 hours, centrifuging, washing and drying to obtain a tea polyphenol pretreatment, preparing a chitosan-glacial acetic acid solution with the chitosan concentration of 0.1-0.15%, adding the tea polyphenol pretreatment, and uniformly stirring to obtain a tea polyphenol-chitosan modified substance; s2, dispersing 1-2 parts of nano silicon dioxide into water according to parts by weight, uniformly stirring, adding 10-12 parts of pretreated plant fibers, adding 2-3 parts of 2-chloroethanethiol, heating to 65-70 ℃, reacting for 1h, cooling, filtering, and drying to obtain silicon dioxide modified plant fibers; S3, according to parts by weight, 7-7.5 parts of polytetrahydrofuran glycol 2-2.5 parts of isophorone diisocyanate, 2-2.5 parts of dimethylglyoxime, 0.1-0.3 part of dibutyltin dilaurate and 0.8-1 part of hydroxyethyl acrylate are reacted for 2 hours at 80 ℃, 0.6-0.8 part of trimethylolpropane and 2-2.5 parts of dimethylglyoxime are added for crosslinking reaction, the temperature is reduced to 50 ℃, 3-5 parts of silicon dioxide modified plant fiber, 0.1-0.15 part of benzoin dimethyl ether and 0.2-0.25 part of p-toluenesulfonic acid are added for high-speed stirring and rapid stirring, 365nm LED (15 mW cm < -2 >) is irradiated for 10-12 minutes, the stirring is synchronously carried out at 200-250rpm, a light source is turned off, 50 ℃ is cured for 1 hour, and vacuum drying is carried out to obtain modified dimethylglyoxime polyurethane resin; And S4, adding 4-5 parts of tea polyphenol-chitosan modified substance and 8-10 parts of modified dimethylglyoxime type polyurethane resin into a high-speed mixer, and mixing for 10-15min at 200-220 ℃ to obtain the tea polyphenol-dimethylglyoxime type polyurethane resin coating. Further, the mass ratio of the lanthanum chloride to the tea polyphenol is 1:1-2. Further, the mass fraction of the glacial acetic acid solution is 1-3%. Further, the preparation method of the pretreated plant fiber comprises the following steps of taking 20-25 parts by weight of bamboo fiber, performing alkaline boiling degumming, drying, adding N, N-dimethylformamide, stirring and heating to 80 ℃, keeping for 1-1.5 hours, adding 3-5 parts of maleic anhydride and 0.3-0.4 part of benzoyl peroxide, stirring uniformly, heating to 90 ℃ in a nitrogen atmosphere, cooling to room temperature, washing with ethanol, filtering, and drying to obtain the pretreated plant fiber. Further, the preparation