Exxonmobil Chemical Patents Inc.

Exxonmobil Engineering & Technology Company

Dow Global Technolgoies LLC

Rohm and Haas Company

Dow Silicones Corporation

Exxonmobil Technology and Engineering Company

Rohm & Haas Electronic Materials LLC

Zhifeng Bai

Narayanaswami R Dharmarajan

John Robert Hagadorn

Jo Ann M Canich

Rhutesh K Shah

Sarah J Mattler

Chase A Eckert

Andy Haishung Tsou

Rainer Kolb

Florin Barsan

Sunny Jacob

John Joseph Rabasco

Liang Chen

Scott H Loyd

David W Abmayr, Jr

Milind B Joshi

Yiyong He

Jodi M Mecca

Sudhakar Balijepalli

Daniel Lawrence Dermody

James Norris Coffey

Jingwen Zhang

Jason A Mann

Jake Joo

Felix M Zacarias

Jessica Ye Huang

Vincent Bernard Gallez

James C Taylor

Brian J Rohde

Yuming Lai

Michael P Tate

Tirtha Chatterjee

Khodabakhsh Irani

Xiao Bo Peng

Sushil K Mandot

Michael Brasseur

Adrian Garcia Barry

Yuya Iwashita

Eric J Wamsley

Babu Shanmugasundaram

David William Abmayr

Felix Manuel Zacarias

Kathleen M O'CONNELL

An elastomeric composition is provided that includes from 1 to 100 parts by weight per hundred parts by weight rubber (phr) of a first propylene-α-olefin-diene (PEDM) terpolymer comprising 70 wt % to 92.5 wt % propylene, 7.5 wt % to 30 wt % a C2 or C4-C12 α-olefin, and 3.5 wt % to 20 wt % diene, said wt % based on the weight of the PEDM terpolymer. The PEDM terpolymer V may have a Mooney viscosity (ML(1+4)) of 25 MU to 100 MU. The composition may further include from 0 to 99 phr of an ethylene-based copolymer comprising 40 wt % to 95 wt % ethylene.

Ethylene-based copolymer and propylene-alpha-olefin-diene compositions for use in layered articles

A liquid applied, silicone-based air and water barrier coating composition and its use as a silicone-based air and water barrier is provided. The barrier is generally vapour permeable and suitable for the construction industry. The liquid coating composition generally has a shelf-life of at least 9 months. The liquid coating composition comprises: (i) a crosslinked polysiloxane dispersion comprising (c) a surfactant and (d) water; (ii) a combination of rheology modifiers and at least one of the following ingredients: (iii) one or more fillers and/or (iv) one or more stabilizers.

Silicone-based barrier compositions

An elastomeric composition suitable for use in belts like transmission belts may comprise: from 5 to 100 phr of a propylene-α-olefin-diene (PEDM) terpolymer comprising 80 wt % to 97.5 wt % propylene, 2.5 wt % to 20 wt % a-olefin, and 0.5 wt % to 10 wt % diene, said wt % based on the weight of the PEDM terpolymer, and wherein the PEDM terpolymer has (a) Mooney viscosity (ML(1+4)) of 1 MU to 60 MU, (b) melt flow rate of 0.5 g/min to 100 g/min, and (c) a weight average molecular weight to n-average molecular weight (Mw/Mn) ratio of 1.5 to 3.0; and from 60 to 95 phr of an ethylene-based copolymer comprising 0 wt % to 95 wt % ethylene, 0 wt % to 10 wt % of one or more dienes, and 5 wt % to 60 wt % C3 to C12 α-olefin, said wt % based on the total weight of the ethylene-based copolymer.

The present disclosure provides methods for producing an olefin polymer by contacting a C-Colefin and ethylene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted tetrahydro-s-indacenyl group and obtaining a C-Colefin-ethylene copolymer typically comprising from 0.5 to 43 wt % ethylene, and from 99.5 to 57 wt % Cto Ccomonomer wherein the Tg of the terpolymer is from 0 to −60° C.

High propylene content EP having low glass transition temperatures

Rubber compounds that comprise rubber and propylene-a-olefin-diene (PE(D)M) polymers may be useful in tire-related articles (e.g., tire sidewalls, inner tubes, and innerliners). Such a rubber compound may comprise: about 5 phr to about 50 phr of the PE(D)M polymer that comprises about 65 wt % to about 99.5 wt % propylene, about 0.5 wt % to about 35 wt % a-olefin that is not propylene, and 0 wt % to about 20 wt % diene, said wt % based on the weight of the PE(D)M polymer, and about 50 parts per hundred parts rubber (phr) to about 95 phr of a rubber that comprises one selected from the group consisting of the halogenated isobutylene-based rubber is selected from the group consisting of: natural rubber, polyisoprene rubber, poly(styrene-co-butadiene) rubber, polybutadiene rubber, poly(isoprene-co-butadiene) rubber, styrene-isoprene-butadiene rubber, butyl rubber, star branched butyl rubber, isobutylene-isoprene rubber, poly(isobutylene-co-alkylstyrene), a halogenated isobutylene-based rubber, polychloroprene rubber, nitrile rubber, and any combination thereof.

Tires comprising rubber compounds that comprise propylene-α-olefin-diene polymers

A multilayer structure can include at least one layer that comprises an ethylene propylene diene copolymer compound that comprises: 60 parts per hundred rubber (phr) to 95 phr of a first ethylene propylene diene copolymer (EP(D)M) having an ethylene content of 62 wt % to 90 wt % based on the first EP(D)M and a heat of fusion (H) of 15 J/g or greater; 5 phr to 40 phr of an second EP(D)M having an ethylene content of 40 wt % to 60 wt % based on the second EP(D)M and a Hof 0 J/g to 14 J/g, wherein the Hof the first EP(D)M minus the Hof the second EP(D)M is 5 J/g or greater; wherein the first EP(D)M and second EP(D)M combined are 100 parts; a filler at 40 phr to 500 phr; and a curing agent at 0.5 phr to 20 phr.

Ethylene propylene copolymer compounds for use in layered articles

A propylene-&#x3b1;-olefin-diene (PEDM) terpolymer may comprise 75 to 95 wt % propylene, 5 to 20 wt % &#x3b1;-olefin, and 0.5 to 5 wt % diene, said wt % based on the weight of the PEDM terpolymer. The propylene-&#x3b1;-olefin-diene terpolymer may be blended with an ethylene-based copolymer and optionally a variety of additives to form an elastomeric composition. An exemplary elastomeric composition includes 5 to 40 parts by weight per hundred parts by weight rubber (phr) of the PEDM terpolymer, 60 to 95 phr of the ethylene-based copolymer, and optionally additives like carbon black, zinc dimethacrylate, paraffinic oil, zinc oxide, and/or zinc stearate.

Elastomeric propylene-alpha-olefin-diene terpolymer compositions

The present disclosure provides methods for producing an olefin polymer by contacting a C-Colefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C-Colefin-ethylene-diene terpolymer typically comprising from 30 to 55 mol % ethylene, from 69.09 to 45 mol % Cto Ccomonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is &#x2212;28&#xb0; C. or less. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems

A compound suitable for use in producing articles including foamed articles can include 100 parts per hundred rubber (phr) of a branched ethylene propylene diene monomer (EPDM) elastomer comprising 35 wt % to 70 wt % ethylene derived units, 20 wt % to 64 wt % propylene derived units, and 1 wt % to 10 wt % diene derived units, wherein the EPDM elastomer has a Mooney viscosity (ML) (1+4) at 125&#xb0; C. of 30 MU to 120 MU, a corrected Mooney relaxation area (cMLRA) at 80 ML of 300 MU&#xb7;sec to 1000 MU&#xb7;sec, and long chain branching (LCB) g' (vis) of 0.80 to 1.0; 75 phr to 200 phr of a filler; 25 phr to 125 phr of a processing oil; 5 phr to 50 phr of a curative, and optionally 0.1 phr to 25 phr of a foaming agent.

Elastomeric formulations comprising branched EPDM polymers

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Houston, TX, United States of America

Zhifeng Bai