Exxonmobil Chemical Patents Inc.

Molly Westermann Johnston

Weiqing Weng

Anthony Jay Dias

Caiguo Gong

Beverly Jean Poole

Kriss Randall Karp

Carmen Neagu

Robert Norman Webb

Michael Brendan Rodgers

John Patrick Soisson

James Richard Ayers

Ramesh Varadaraj

Sunny Jacob

David John Lohse

Mun Fu Tse

Cornelius Hendrick Brons

Alan Anthony Galuska

James Peter Stokes

Edmund J Stachowski, Iii

Ramanan Krishnamoorti

Mun-Fu Tse

Beverly J Poole

Edmund J Stachowski

Ramanan University Of Houston Krishnamoorti

Caiguo c/o Em Chem Services Gong

Kris Randall Karp

Kriss P Karp

An elastomeric nanocomposite contains: (a) at least one elastomer comprising units derived from isoolefins having from 4 to 7 carbon atoms; (b) at least 10 phr of a carbon black; and (c) at least 1 phr of a nanoclay; wherein when the nanocomposite is used in an article, the article has a gas permeation coefficient of 80.0 cc*mm/[m-day] at 40&#xb0; C. The carbon black may be graphitized to reduce interactions between the carbon black and the nanoclays. The elastomeric nanocomposite may, with or without the use of the graphitized carbon black, may calendared or extruded in such a manner as to orient the nanoclay platelets within the composition such that the oriented nanoclay elastomer nanocomposite has an orientation parameter of greater than 0.15.

Elastomeric nanocomposites, nanocomposite compositions, and methods of manufacture

The present invention relates to processes to produce nanocomposites. In particular, the invention relates to solution processes using organic solvents and mixtures of solvents to produce polymeric nanocomposites.

Polymeric nanocomposites and processes for making the same

A nanocomposite is formed from at least one copolymer and at least one nanofiller. The copolymer is formed of units derived from isoolefins having from 4 to 7 carbon atoms and multiolefins. The nanofiller comprising a surfactant wherein the surfactant has the structure of (RRRR)Nwherein Ris benzyl derived unit, which may or may not be substituted, wherein Ris selected from Cto Calkyls, Cto Calkenes, and Cto Caryls, and wherein Rand Rare the same or different and are independently selected from Cto Calkyls, Cto Calkenes, and Cto Caryls.

A nanocomposite comprising at least one elastomer and at least one nanofiller. The elastomer comprises units derived from isoolefins having from 4 to 7 carbon atoms and at least one multiolefin. The nanofiller comprise a layered filler and an amine modifier wherein the nanofiller is substantially free of any unassociated amines. By eliminating unassociated amines in the nanofiller, prior to contact with the elastomer, the nanocomposite has improved processability characteristics while maintaining desired impermeability characteristics.

The present invention provides a nanocomposite of a star branched elastomer and a clay. The nanocomposite can be a mixture of a halogenated star branched elastomer and a clay, desirably an exfoliated clay, suitable for use as an air barrier. The halogenated star-branched elastomer can be the primary halogenated elastomer in the blend, and a ratio of the star-branched elastomer to clay can be from 2:1 to 500:1.

Nanocomposites and methods for making the same

The present invention relates to modified layered fillers made from layered fillers and modifying agents and processes to produce the same. The invention also relates to nanocomposite compositions made from these modified layered fillers and elastomers, and processes to produce the same, and their use in articles.

Modified layered fillers and their use to produce nanocomposite compositions

The present invention provides a nanocomposite of an elastomer, a polymer or oligomer functionalized with a polar group, and a clay. The nanocomposite can be a mixture of a halogenated elastomer, an acid or acid anhydride modified polymer, and a clay, desirably an exfoliated clay, suitable for use as an air barrier. Also disclosed is a nanocomposite that can be a mixture of a halogenated elastomer, a polymer modified with a carboxylic acid, and an organoclay.

Elastomer nanocomposites comprising isobutylene and multifunctional oligomers

The invention provides for processes for preparing a nanocomposite compositions including the steps of: contacting a multifunctional intercalant including a cationic moiety separated from an anionic moiety by at least 1 carbon, with a clay at a temperature and for a period of time sufficient to produce an at least partially intercalated clay; and contacting the at least partially intercalated clay with a functionalized interpolymer including one or more functional groups, at a temperature, and for a period of time sufficient to produce the nanocomposite compositions. Cured nanocomposite compositions, and articles including such nanocomposite compositions are also provided.

Nanocomposite compositions and processes for making the same

A nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay, suitable for use as an air barrier, is disclosed. The halogenated elastomer can be a polymer comprising Cto Cisoolefin derived units, para-methylstyrene derived units, and para(halomethylstyrene) derived units, or can be a butyl-type rubber. The nanocomposite can be formed by contacting an aqueous slurry of inorganic clay with a polymer cement while agitating vigorously to form emulsions or micro-emulsions to intimately mix the inorganic clay and the elastomer. The nanocomposite so formed has improved air barrier properties and is suitable for use as an innerliner or innertube.

Growing community of inventors

Baytown, TX, United States of America

Molly Westermann Johnston