Microparticle composition and method

摘要

The invention relates to a cross-linked hydrogel composition in the form of substantially uniform microparticles and a method of preparation therefor. The hydrogel composition comprises a crosslinked polymer formed by free radical polymerization of olefin monomers comprising a C3-C6 unsaturated carboxylic acid and a water dispersible polyolefin crosslinking agent. The olefin monomers may further comprise a polyalkyleneglycol monoacrylate or momomethacrylate.