Exxonmobil Chemical Patents Inc.

Chevron Oronite Company LLC

Shuhui Kang

Peijun Jiang

John Robert Hagadorn

Jo Ann M Canich

Jingwen Zhang

Sarah J Mattler

David L Morgan

Pritesh A Patel

Chase A Eckert

Maryam Sepehr

Sara Yue Zhang

Pritesh Arjunbhai Patel

Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20% by weight of ethylene, b) 80 to 98% by weight of propylene; c) 50 to 99% of rr triads; and d) Mw (LS) of 10 to 250 kg/mol.

Lubricating oil composition with viscosity modifier based on syndiotactic propylene-based ethylene- propylene copolymers with improved properties

A method of analyzing a multi-component polymer comprising: (a) dissolving an multi-component polymer having a primary monomer and primary comonomer to form a first volume (soluble portion of multi-component polymer); (b) injecting a portion of the first volume into a chromatographic column to get elution first slices, leaving a second volume behind; (c) filtering the second volume to isolate multi-component polymer solids; (d) dissolving solids to form solution third solution (insoluble portion of multi-component polymer); (e) injecting a portion of third solution into the chromatographic column to get elution second slices; (f) obtain infra-red spectra at wavelengths suitable for the primary monomer and the primary comonomer of first and second elution slices, separately; and (g) for each elution slice, separately calculate: (i) the different polymer components (soluble and insoluble); and (ii) the comonomer content of each component (soluble and insoluble).

Integrated high-throughput methods to characterize multi-component polymers

A method for deconvoluting the molecular weight characteristics of the copolymer or rubber in an impact copolymer (ICP) comprising at least one copolymer or rubber and at least one homopolymer such as polypropylene, as well as a method of determining the comonomer characteristics of the rubber in an ICP, the methods comprising in part eluting a solubilized ICP through a gel permeation chromatographic (GPC) column to form an eluate comprising the rubber and/or polypropylene, measuring the Infrared (IR) absorption of at least the primary monomer-derived unit stretch frequency and the comonomer-derived unit in elution volume slices to determine the amount of comonomer, measuring the concentration of ICP using any detector, and determining the mass concentration, comonomer composition, and the total comonomer content of the ICP through the appropriate mathematical transformations.

Methods of determining molecular weight and comonomer characteristics of a copolymer in polymer blends

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Houston, TX, United States of America

Shuhui Kang