Prepn of nanometer reactive polymer microgel

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 ...