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Water Soluble Hydrophobically Associating Copolymer

A hydrophobic association and copolymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of high gel ratio, inability to completely eliminate, and polymer flooding damage.

Active Publication Date: 2021-10-26
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] A disadvantage of all so far described and commercially available hydrophobically associating polymers is that they still have a very high proportion of gels which are formed upon dissolution and which can plug porous rock formations, the result being a homogeneous polymerization physical flooding will obviously be disrupted
According to the as yet unpublished European patent application EP 09 160 799.4, this problem has been partially solved using copolymers: although the proportion of gels in them can be significantly reduced, they cannot be completely eliminated

Method used

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preparation example Construction

[0099] Preparation of Water-Soluble Hydrophobically Associating Copolymers

[0100] The copolymers of the invention can be prepared by free-radical polymerization of the monomers (a), (b) and optionally (d) by methods known in principle to those skilled in the art, for example by solution polymerization in aqueous phase or gel polymerization, but each possible polymerization variant must be carried out in the presence of at least one component (c).

[0101] The synthesis of the monomers (a) of the formula (I) used according to the invention is particularly preferably prepared by alkoxylation of alcohols (III) and optionally subsequent etherification according to the preparation methods described above.

[0102] In a preferred embodiment, the preparation takes place by gel polymerization in aqueous phase. For the gel polymerization, a mixture of monomers (a), (b) and optionally (d), initiators, surfactants (c) and further auxiliaries is first prepared together with water. Aci...

Embodiment

[0123] 1. Preparation method

[0124] 1.1 Preparation Example 1 (comparison): no surfactant is added during polymerization

[0125] First 242.5 g of a 50% Na AMPS solution (AMPS 2405, Lubrizol) were added to a 3 l vessel equipped with a stirrer and thermometer. 295.8 g of water were added with stirring. Then 1.2 g of Surfynol DF 58 and 0.4 g of Baysilone EN (Bayer) were added successively as antifoams. After adding 4.6 g of Pluriol A1190V+12PeO (a development product from BASF consisting of hydroxybutyl vinyl ether with 25 ethylene oxide units and 12 pentylene oxide units), 228.8 g of 50% concentration of acrylamide solution (Cytec). After adding 2.4 g of 5% Versenex solution to destabilize the acrylamide solution, use 20% NaOH solution and / or 20% H 2 SO 4 The pH of the solution was adjusted to 6.0. During inertization by purging with nitrogen for 30 minutes, the solution was cooled to about 20°C. The solution was then transferred to a plastic container with dimensions ...

preparation Embodiment 2-4

[0128] 1.2 Preparation Example 2-4 (the present invention): adding surfactant during gel polymerization

[0129] In addition to the monomer solution described in Comparative Example 2, prior to polymerization, Lutensol TO 15 (BASF, C13 oxo alcohol ethoxylate + 15 ethylene oxide units) was used as surfactant in the following amount Dissolved in monomer solution:

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Abstract

The present invention relates to water-soluble surfactants comprising a monoethylenically unsaturated water-soluble surface-active monomer (a) and a monoethylenically unsaturated hydrophilic monomer (b) different from monomer (a). Hydrophobically Associating Copolymers. The copolymer is prepared in the presence of a non-polymerizable surfactant and has outstanding thickening properties in aqueous systems.

Description

[0001] This application is a divisional application of an invention patent application with an application date of July 30, 2010, an application number of 2010800322518, and an invention title of "water-soluble hydrophobic association copolymer". technical field [0002] The invention relates to a water-soluble hydrophobic association copolymer obtained in the presence of non-polymerizable surface-active compounds, and relates to its preparation method and use. Background technique [0003] Water-soluble polymers with thickening properties are used in many technical fields, for example in the cosmetics sector, in food, in the manufacture of cleaning agents, printing inks, latex paints and especially also in the recovery of mineral oils. [0004] Many chemically different classes of polymers are known to be useful as thickeners. An important class of thickening polymers are the so called hydrophobically associating polymers. Those skilled in the art understand the meaning to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/48C08F222/00C08F228/02C08F220/00C08F220/58C08F216/14C08F2/00C08F220/28C08F220/56C08F222/10C08F220/34C08F283/06C08L41/00C08L29/10C09K8/24C09K8/588C09K8/584
CPCC08F220/34C08F220/56C09K8/584C09K8/588C08F220/585C08F2/00C08F220/00C08F222/00C09K8/24
Inventor T·珀费欧佛R·赖歇贝奇-克林科S·弗里德里西M·古兹曼
Owner BASF SE