Patent ID: 9651846
Date: 2017-05-16
CPC Classifications: C01P,C08F,C09C,G02F

Claim:
1. Particles consisting of organic or inorganic pigment core particles encapsulated by a porous polymeric shell consisting of monomer units of at least one polymerisable steric stabiliser, at least one co-monomer, optionally at least one polymerisable dye, wherein the particles have a density of ≦2.0 g/ml and wherein pores in the polymeric shell of the particles are at least partially filled with a polar organic solvent, and wherein the particles are formed from a dispersion comprising 0.1-80% by weight of at least one organic or inorganic pigment particle, 0.1-50% by weight of at least one polar organic solvent, 0.1-50% by weight of at least one polymerisable steric stabiliser, and 40-95% by weight of co-monomer based on the total weight of the dispersion except solvent.