N-end-amino polyether-based acrylamide monomer and preparation method thereof

A technology of amino-terminated polyether-based acrylamide and double-terminated amino-based polyether, which is applied in the field of N-terminated amino-based polyether-based acrylamide monomer and its preparation, can solve the problem of disappearance of polymerizable parts, difficulty in popularization, and raw materials Problems such as high price, to achieve good hydration swelling, salt resistance, good inhibition ability, and wide application prospects

Active Publication Date: 2015-09-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymerizable surfactants are mainly used in the emulsion polymerization of various monomers, but there are still the following problems in practical applications: high raw material prices or low yields lead to high product prices and are difficult to apply; emulsification and dispersion properties are not as good as traditional Surfactants; some synthetic reactions make the polymerizable part disappear, resulting in no polymerizable properties; some products or raw materials or production processes are not environmentally friendly, making it difficult to promote

Method used

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  • N-end-amino polyether-based acrylamide monomer and preparation method thereof
  • N-end-amino polyether-based acrylamide monomer and preparation method thereof
  • N-end-amino polyether-based acrylamide monomer and preparation method thereof

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preparation example Construction

[0033] According to the preparation method provided by the present invention, preferably, the contact between the double-terminated amino polyether represented by the formula (2) and the acryloyl halide represented by the formula (3) is carried out in the presence of an organic solvent and / or an acid-binding agent Further preferably, the contact between the double-terminated amino polyether represented by the formula (2) and the acryloyl halide represented by the formula (3) is carried out in the presence of an organic solvent and an acid agent, on a molar basis, The ratio of the double-terminated amino polyether: organic solvent: acid binding agent is preferably 1:15-25:1.0-1.05, more preferably 1:18-22:1.0-1.02.

[0034] The organic solvent can be various organic solvents that can be used for the condensation reaction of amino groups and acyl halides, as long as they do not adversely affect the reaction. Preferably, the organic solvent is one or more of dichloromethane, dich...

Embodiment approach

[0036]According to a preferred embodiment of the present invention, the preparation method of the N-terminated amino polyether acrylamide monomer comprises the following steps:

[0037] (1) Add double-terminated amino polyether, organic solvent and acid-binding agent solution with a concentration of 20-50% by weight into a reaction bottle equipped with a cooling device, cool down to below 5°C, and then slowly add acryloyl halide, During the addition process, the temperature should not exceed 15°C. After the acryloyl halide is added, react at a temperature below 10-20°C for 0.5-4 hours;

[0038] (2) Leave the reactant obtained in step (1) to stand, separate the organic phase, wash several times with aqueous sodium chloride solution (preferably at a concentration of about 10% by weight), remove the water-soluble substances therein, and then wash it with anhydrous sulfuric acid Sodium is dried, and the organic solvent is evaporated to obtain an orange-red viscous liquid—the crude...

Embodiment 1

[0045] 1 mole of double-terminated amino polyether (structure as in formula (2), R 2 =R 3 =H, n=2), 15 moles of dichloromethane and 1 mole of sodium hydroxide (formed into an aqueous solution with a concentration of 40% by weight) were added to the reaction flask equipped with a cooling device, cooled to 5°C, and then slowly added 1 moles of acryloyl chloride, the temperature during the addition process does not exceed 15°C, after the addition of acryloyl chloride, react at a temperature below 15°C for 0.5h; let the obtained reactant stand still, separate the organic phase, and wash with a NaCl aqueous solution with a concentration of 10% by weight 3 times, dried with anhydrous sodium sulfate, evaporated the organic solvent to obtain an orange-red viscous liquid—the crude product, and washed the crude product with acetone to obtain a polymer grade product. The product was subjected to infrared spectroscopy. pass figure 1 It can be clearly seen that the primary amino peaks i...

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Abstract

The invention provides an N-end-amino polyether-based acrylamide monomer and a preparation method thereof. The structural formula of the N-end-amino polyether-based acrylamide monomer is represented by the formula (1). The preparation method comprises a step of contacting amino terminated polyether represented by the formula (2) with acryloyl halogen represented by the formula (3) to carry out reactions under the acylation conditions. The provided N-end-amino polyether-based acrylamide monomer has an excellent polymerizable property; the monomers can carry out self-polymerization or carry out polymerization with other monomers, and in the drilling fluid, the generated polymer can well inhibit the hydration expansion of shale or clay, so the provided monomer can be used to produce drilling fluid loss reducer, tackifier, and flocculating agent, which have an excellent inhibiting, coating, and collapse-preventing effect; and moreover, the temperature resistant property, salt resistant property, and salt inhibiting performance of the monomer are all very good.

Description

technical field [0001] The invention relates to an acrylamide monomer, in particular to an N-terminal amino polyether-based acrylamide monomer and a preparation method thereof. Background technique [0002] In the process of oil drilling, the drilled formations are becoming more and more complex, and the number of special wells, ultra-deep wells and complex wells is increasing year by year, which puts forward higher requirements for drilling fluids, but the traditional linear polymer drilling fluid treatment agents can no longer fully meet the requirements of drilling fluids. needs. With the development of unconventional oil and gas represented by shale gas, new requirements are put forward for the performance of drilling fluid. The oil-based drilling fluid system is used in most of the shale gas horizontal wells completed recently in China. Due to the high cost of oil-based drilling fluid and the pollution to the environment, water-based drilling fluid is the final choice...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/20C07C231/02C09K8/035C09K8/24C08G65/00C08F220/60C08F220/58C08F220/56C08F220/06C08F290/06
Inventor 王中华
Owner CHINA PETROLEUM & CHEM CORP
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