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Prepn of nanometer reactive polymer microgel

A reactive polymer and microgel technology, applied in the field of nano-scale reactive polymer microgels, can solve the problems of complex and rare emulsifiers, and achieve the effects of convenient and easy-to-obtain raw materials and simple and direct methods.

Inactive Publication Date: 2003-12-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports on the preparation of reactive polymer microgels by microemulsion polymerization; although there have been reports on the use of emulsion polymerization to prepare microgels with a particle size of less than 50 nm, the emulsifiers used are complex and difficult to obtain.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2：2.0gMMA1.0gAOT、0.5g1-pentanol、0.2g2-EHA、0.08gHEMA、1.8gBDMA and 28g，。 to 75℃，5，2g0.1gKPS，。5，，。，16gMMA，75℃ and N2。，75℃1.5，，。，80g，，30g，，。 Embodiment 3

[0038] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Example 1: 2.0gMMA was dropped into a colloidal solution composed of 1gSDBS, 0.5g1-pentanol, 0.08gBA, 0.24gGMA, 1.8gEGDMA and 28g deionized water to form a uniform and transparent pre-microemulsion. Stir the pre-microemulsion and raise the temperature to 70° C., pass nitrogen through the system for 5 minutes to remove oxygen, and then add 2 g of an aqueous solution containing 0.1 g of APS into the system to initiate the polymerization of the system. After being stable for about 5 minutes, the microemulsion gradually changed from colorless and transparent to very light transparent blue, indicating that the initiation had begun. At this time, drop 16g of MMA into the polymerization system drop by drop at a slow speed, maintain 70°C and N 2 atmosphere. After the monomers are dropped, continue to react at 70° C. for 2 hours to ensure that the monomers are completely reacted, and the reaction ends, and the product is a bluis...

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PUM

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Abstract

The improved positive phase-micro-emulsion polymerization process of the present invention comprises adding emulsifier, initiator, long-chain flexible monomer, functional monomer, polyfunctionality monomer, etc. the heat initiating system of methyl acrylate or styrene monomer, synthesis of homogeneous transparent or semi-transparent nanometer polymer microgel at mild condition in controlled batch range and then transferring into oil phase to form reactive non-aqueous dispersant microgel liquid. By means of the great amount of reactive functional groups, the microgel may be used in regulating rheological property of paint, preparing pigment moistening dispersant, etc.

Description

technical field [0001] The invention is a method for synthesizing near-transparent nanoscale reactive polymer microgel in a microemulsion polymer system. Background technique [0002] Polymer microgel (microgel), also often called μ-gel, is a kind of intramolecular cross-linked macromolecule, whose molecular structure is between branched macromolecule and macroscopic network polymer, a microgel A particle is a macromolecule, and the macromolecular chain is limited to a certain area for intramolecular cross-linking to form a network structure. There is no chemical bonding between microgel particles, or between individual microgel molecules. As early as 1934, Staudinger et al. synthesized this intramolecular cross-linked product. In 1948, Schulze and Crouch found that the viscosity of the soluble part of styrene / butadiene copolymer decreased sharply after gelation, and Baker attributed this phenomenon to the formation of microgels. Funke has done a lot of work on microgels,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/22
Inventor 姜琬聂莉星府寿宽
Owner FUDAN UNIV
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