Polymer having a small average particle size

Abstract

The present invention relates to a polymer comprising: (a) polymeric units derived from vinyl chloride, vinyl acetate, styrene, methyl methacrylate, acrylonitrile, or combinations thereof; and (b) polymeric units derived from one or more compounds according to formula I: wherein: R1 is CH3 or H; R2 is a moiety comprising 1-20 carbon atoms; and n is an integer from 1-10; wherein the polymer has an average particle size of 10-80 μm expressed as D50 determined in accordance with ISO 9276-2 (2014); and a porosity of ≤0.20 ml/g as determined as the quantity of di(2-ethylhexyl)phthalate in ml absorbed by 1 g of polymer upon subjecting the polymer at 23° C. to vacuum, submerging in di(2-ethylhexyl)phthalate for 10 min, and subsequently centrifuging at 2000 rpm for 45 min. Such polymer may be used as viscosity reducing agent in PVC plastisol compositions.

Dependencies are inferred from the claim text.