Preparation of low density, high-strength, strong hydrophobic particles (LHSPs) and its application as oil fracturing proppant

Progress of Polymer Application in Coated Proppant and Ultra-Low Density Proppant

“…Since polymethyl methacrylate (PMMA) has high modulus and excellent chemical resistance, cross-linked PMMA microspheres have also been widely studied and applied in ULDP (Table 8). In the investigation of Huang and co-workers [59], silane coupling agent A151 (vinyl triethoxysilane) was added in the preparation of cross-linked PMMA microspheres with suspension polymerization. The A151 can not only covalent linked to the cross-linked PMMA through the addition polymerization of double bond, but also can further cross-linked with the hydrosis and polycondensation of ethoxy, which can form a strong inorganic coating on the surface.…”