Ppg Industries Ohio, Inc.

Matthew William Skinner

Cynthia Kutchko

Michael J Pawlik

Scott J Moravek

Edward Richard Millero, Jr

Michael G Olah

Daniel Connor

Jonathan G Weis

William H Retsch

Qi Ding

Theodore Frank Novitsky, Jr

Hyun Wook Ro

Samuel L Esarey

Caitlyn B Neidig

Larry J Ruffaner

Inanllely Y Gonzalez

Pawel M Krys

There is described a method for the production of a functional polyester having functional group X. The method comprises the step of melt blending a composition comprising (i) a high number average molecular weight (Mn) polyester having a Mn of ≥6,000 Da; and (ii) a functional compound comprising functional group Y which may be the same as functional group X or be different to functional group X but be operable to form functional group X in the functional polyester. The composition is melt blended such that the high Mn polyester and the functional compound react to produce the functional polyester. The high Mn polyester has a Mn that is higher than the Mn of the functional compound. The present invention extends to functional polyesters produced by the method; aqueous, solventborne and powder coating compositions containing the functional polyester, and articles coated with the said coating compositions.

Functional polyester and method of producing the same

Graphenic carbon nanoparticles that are dispersed in solvents through the use of dispersant resins are disclosed. The graphenic carbon nanoparticles may be milled prior to dispersion. The dispersant resins may comprise a polymeric dispersant resin comprising an addition polymer comprising the residue of a vinyl heterocyclic amide, an addition polymer comprising a homopolymer, a block (co)polymer, a random (co)polymer, an alternating (co)polymer, a graft (co)polymer, a brush (co)polymer, a star (co)polymer, a telechelic (co)polymer, or a combination thereof. The solvents may be aqueous, non-aqueous, inorganic and/or organic solvents. The dispersions are highly stable and may contain relatively high loadings of the graphenic carbon nanoparticles.

Dispersions containing graphenic carbon nanoparticles and dispersant resins

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Pittsburgh, PA, United States of America

Matthew William Skinner