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Method for preparing acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid copolymer sodium salt derivative

A technology of methyl propyl sulfonic acid and acrylamide, which is applied in the field of binary polymer preparation and can solve the problems of less research reports on aqueous RAFT polymerization of acidic monomers

Active Publication Date: 2017-08-29
GUANGZHOU LIBY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the existing reports of RAFT active polymerization in aqueous solution, although the aqueous active polymerization of acrylamide monomers, acrylic acid and maleic acid monomers has been successfully realized, and the molecular weight distribution of the polymer is well controlled, but There are few reports on aqueous RAFT polymerization of acidic monomers

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  • Method for preparing acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid copolymer sodium salt derivative
  • Method for preparing acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid copolymer sodium salt derivative
  • Method for preparing acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid copolymer sodium salt derivative

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Embodiment Construction

[0032] The features, benefits and advantages of the present invention will become apparent to those skilled in the art from reading the disclosure of this specification.

[0033] All percentages, fractions and ratios are calculated by weight of the total composition of the present invention, unless otherwise specified. All weights as they pertain to listed ingredients are given at the active level and, therefore, do not include solvents or by-products that may be included in commercially available materials, unless otherwise specified. The term "weight content" herein can be represented by the symbol "%".

[0034] All molecular weights herein are relative molecular masses unless otherwise indicated.

[0035] All formulation and testing herein took place at a 25°C environment unless otherwise specified.

[0036] Herein "comprises", "comprising", "comprising", "comprising", "having" or other variations thereof are intended to cover non-closed inclusions and no distinction is m...

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Abstract

The invention discloses a method for preparing a sodium salt derivative of an acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid copolymer. A specific synthesis method comprises the following steps: (1) adding acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, an RAFT (Reversible Addition-Fragmentation Chain Transfer) reagent and deionized water into a reactor, and stirring till the materials are dissolved; (2) heating to 50-70 DEG C, and dropwise adding a persulfide aqueous solution slowly; (3) continually stirring for 5-8 hours after the end of dropwise adding; (4) adding a NaOH aqueous solution into the reactor, adjusting the pH to 8-9, and performing rotary evaporation to remove a solvent in order to obtain a product. The sodium salt derivative of the acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid copolymer prepared through the method has a number-average molecular weight of 5,200-10,000, and molecular weight distribution of between 1.60 and 1.85.

Description

technical field [0001] The invention relates to a method for preparing binary polymers, in particular to a method for preparing sodium salt derivatives of acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid copolymer with narrow molecular weight distribution. Background technique [0002] Polymers containing carboxylic acid groups and sulfonic acid groups have excellent water solubility, good dispersion ability, complexation and ability and anti-scaling ability. One of the most common monomers containing sulfonic acid groups is 2-Acrylamide-2-methylpropane Sulfonic acid (AMPS). The structure is as follows. [0003] [0004] The synthesis of AMPS began in 1961. In the early 1970s, the American Lubrizol Company, Rohm and Haas Company, and Nitto Chemical Company gradually industrialized production. The main raw materials for the synthesis were isobutylene, sulfonating reagents, and acrylonitrile. [0005] Copolymers of AMPS and acrylic acid (AA) are the most intensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/58C08F2/38C08F2/10
CPCC08F2/10C08F2/38C08F220/06C08F220/58C08F220/585
Inventor 黄亮钱程洪银旋陈玉娥吴萍萍张利萍
Owner GUANGZHOU LIBY