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Prepn of nanometer reactive polymer microgel

A technology of reactive polymers and microgels, applied in the field of nanoscale reactive polymers and microgels, can solve the problems of complex and difficult emulsifiers, and achieve the effect of convenient and easy-to-obtain raw materials and simple and direct methods

Inactive Publication Date: 2002-01-23
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 2：2.0gMMA1.0g AOT、0.5g1-pentanol、0.2g 2-EHA、0.08g HEMA、   1.8g BDMA and 28g，   。 to 75℃，5，2g   0.1g KPS，。5，   ，。，16g   MMA，75℃ and N2。   ，75℃1.5，，。   ，80g，，   30g，，。 Embodiment 3

[0038] DETAILED DESCRIPTION Example 1: Drop 2.0g MMA into a colloidal solution composed of 1g SDBS, 0.5g 1-pentanol, 0.08g BA, 0.24g GMA, 1.8g EGDMA and 28g deionized water to form a uniform and transparent pre-microemulsion . The pre-microemulsion was stirred and heated to 70°C, the system was purged with nitrogen for 5 minutes to remove oxygen, and then 2 g of an aqueous solution containing 0.1 g of APS was added to the system to initiate the polymerization of the system. After about 5 minutes of stabilization, the microemulsion gradually turned from colorless and transparent to a very light transparent blue, indicating that initiation had begun. At this time, 16 g MMA was dropped dropwise into the polymerizing system at a slow speed, maintaining 70 °C and N 2 atmosphere. After the monomer was dripped, the reaction was continued at 70°C for 2 hours to ensure that the monomer reaction was complete, and the reaction was terminated, and the product was a bluish translucent li...

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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 batchrange 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 present invention is a method for synthesizing near-transparent nano-scale reactive polymer microgels in a microemulsion polymer system. Background technique [0002] Polymer microgels (microgels), also often referred to as μ-gels, are intramolecularly cross-linked macromolecules whose molecular structure is between branched macromolecules and macroscopic network polymers. 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 the microgel particles, or between the individual microgel molecules. As early as 1934, Staudinger et al. synthesized this intramolecular cross-linked product. In 1948, Schulze and Crouch found that the soluble fraction of styrene / butadiene copolymers had a sharp drop in viscosity after gelation, and Baker attributed this phenomenon to the formation of microgels. Funke has done a lot of work ...

Claims

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Application Information

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IPC IPC(8): C08F2/22
Inventor 姜琬聂莉星府寿宽
Owner FUDAN UNIV
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