Synthesis technology of twin-tailed hydrophobic monomer based on distillation pressure control

Abstract

The invention discloses a synthesis technology of a twin-tailed hydrophobic monomer based on distillation pressure control. The technology comprises the following steps: 1, dissolving acryloyl chloride in a dichloromethane solution; 2, adding the above obtained acryloyl chloride and dichloromethane mixed solution, dibutylamine and an aqueous solution of NaOH into a reaction container, and fully shaking; 3, placing the reaction container in a water bath; 4, stirring, and introducing an inert gas; 5, separating out an organic layer, and washing; 6, drying, and distilling under 0.2-0.6atm to vaporize a solvent in order to obtain a light yellow oily liquid; and 7, adding a polymerization inhibitor, carrying out reduced pressure distillation under a certain degree of vacuum at a certain temperature to obtain a colorless oily liquid which is a target product. The twin-tailed hydrophobic monomer can be successfully synthesized through the technology, and the synthesized twin-tailed hydrophobic monomer has the advantages of excellent performances, simple synthesis steps and substantially reduced synthesis cost; and the distillation pressure in the synthesis process is controlled to improve the yield and the quality of the product.

Description

technical field [0001] The invention relates to a process for synthesizing a twin-tailed hydrophobic monomer with controlled distillation pressure. Background technique [0002] Hydrophobic association water-soluble polymer is a water-soluble polymer formed by introducing a very small amount of hydrophobic groups into the hydrophilic main chain of the polymer. In aqueous solution, hydrophobic association The hydrophobic groups of water-soluble polymers tend to associate together due to the hydrophobic effect, forming intramolecular and intermolecular associations. Hydrophobically associated water-soluble polymers exhibit special rheological properties different from general water-soluble polymers. These characteristics make hydrophobically associated polymers show great potential in many industrial technologies such as enhanced oil recovery, washing, coatings, etc. Therefore, the exploration of hydrophobically associated water-soluble polymers has become one of the most int...

AI Technical Summary

Problems solved by technology

The advantage of the macromolecular reaction method is that commercial polymers can be directly used as starting materials, and the relative molecular weight of the obtained products is high. The disadvantage is that the reaction is carried out in a high-viscosity polymer solution, and the reactants are not easy to mix uniformly.

In this way, hydroxyethyl cellulose (HEC) can be reacted with hydrophobic compounds with active groups. These hydrophobic compounds can be epoxy compounds with long chain alkyl groups, halogenated hydrocarbons, acid halides, isocyanates etc. It is also possible to connect hydrophobic groups at both ends of polyethylene glycol (PEG), but generally the amount of hydrophobic groups introduced is very small, because a high content of hydrophobic monomers will significantly reduce the solubility of water-soluble polymers, and Heteroatom backbone polymers are less thermally stable than carbon chain polymers

Because when the carbon atoms in the polymer chain are replaced by heteroatoms such as oxygen, sulfur, nitrogen, etc., the bond energy of the C-O, C-S, and C-N bonds is lower than that of the C-C bond, and the thermal stability of the polymer is reduced.