Patent ID: 8765890
Filing Date: 2014-07-01
Classification: C08F,C08K,C08L

Abstract:
1. A process for preparing an aqueous polyvinylidene fluoride dispersion comprising polymerizing from 50 to 100 mole percent of vinylidene fluoride monomer units and from 0 to 50 mole percent of one or more other fluoromonomers in an aqueous medium comprising from 100 ppm to 2 percent, based on the weight of the fluoropolymer solids formed, of one or more block emulsifier(s) having at least two different blocks, and having the formula: wherein, X, Y, and Z are between 2 to 200; and m, n, k are from 0 to 5, T 1 and T 2 are terminal groups selected from hydrogen, hydroxyl, carboxyl, ester, ether and/or hydrocarbon, and wherein no fluorosurfactant is used in the process.