Patent ID: 11939486
Assignee: DOW GLOBAL TECHNOLOGIES LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 12:
13. A process of preparing an aqueous dispersion of polymeric particles, comprising:
polymerizing monomers in an aqueous medium in the presence of a polyalkylene oxide to obtain the aqueous dispersion of polymeric particles,
wherein the monomers comprise an ethylenically unsaturated phosphorous acid monomer and/or a salt thereof,
wherein the polyalkylene oxide with a weight average molecular weight in the range of 450 to 1,500 g/mole has the structure of formula (I),

R1—O-(AO)m—R2  (I),

where R1 and R2 each independently represent a hydrogen atom or a straight, branched or cyclic, saturated or unsaturated alkyl group having from 1 to 22 carbon atoms; AO represents an oxybutylene unit or a combination of an oxybutylene unit with an oxypropylene unit; and m is an integer of from 5 to 23; and
wherein the amount of the polyalkylene oxide in the polymeric particles is 50% or more by weight based on the total weight of polyalkylene oxides in the aqueous dispersion.