Eastman Chemical Company

Flexsys America L.p.

Monsanto Company

Other

Flexsys Holdings, Inc.

Frederick Ignatz-Hoover

Matthew Allen Boone

Donald L Fields, Jr

Scott Donald Barnicki

Robert Thomas Hembre

Henk Kreulen

Andrew Neil Smith

Aruna Mani Velamakanni

Aubert Y Coran

Samuel J Tremont

Otto W Maender

Martin P McGrath

Leonard Harris Davis

Thomas B Rauchfuss

Chenchy Lin

Ronald H Arthur

Rakshit Lamba

Aruna M Velamakanni

Donald L Fields

Vulcanizable elastomeric formulation are disclosed. The formulations comprise at least one elastomer; a vulcanizing agent comprising cyclododecasulfur; and a prevulcanization inhibitor, present in an amount, for example, from about 0.01 phr to about 10 phr. The formulations, when vulcanized, provide articles that exhibit improved durability.

Durable elastomeric compositions employing cyclododecasulfur as a vulcanizing agent

Methods of making antidegradant compounds are disclosed in which a p-phenylenediamine is reacted with a dicarbonyl to thereby obtain a diimine, which is reduced to obtain mixtures comprising the antidegradant compound.

Methods of making compounds and mixtures having antidegradant and antifatigue efficacy

A vulcanizing composition useful for the vulcanization of vulcanizable formulations is disclosed. The vulcanizing composition includes a vulcanizing agent which in turn includes a cyclododecasulfur compound. A cyclododecasulfur compound characterized by a DSC melt point onset of between 155&#xb0; C. and 167&#xb0; C. when measured at a DSC heat rate of 20&#xb0; C./minute is also disclosed.

Vulcanizing composition containing cyclododecasulfur and improved cyclododecasulfur compound

Compounds with antidegradant and antifatigue efficacy and compositions including said compounds

Processes for forming a vulcanizable elastomeric formulation are disclosed. The processes include the steps of mixing an elastomer with a vulcanizing agent to form a vulcanizable elastomeric formulation that includes the vulcanizing agent dispersed in the elastomeric compound, wherein the vulcanizing agent includes a cyclododecasulfur compound. A process for forming a vulcanized elastomeric article is also described.

Processes for forming vulcanizable elastomeric formulations and vulcanized elastomeric articles

Compounds and mixtures with antidegradant and antifatigue efficacy and compositions including said compounds

Antidegradant compounds are disclosed, and methods of making them, that are represented by the formula I:  Also disclosed are diimine intermediates corresponding to formula III: 

Compounds and mixtures with antidegradant and antifatigue efficacy and compositions including such compounds

Methods of making antidegradant compounds are disclosed in which a p-phenylenediamine is reacted with a diol to obtain mixtures comprising the antidegradant compounds.

A method of making antidegradant compounds is disclosed, in which a p-phenylenediamine is reacted with an alpha-hydroxy carbonyl compound to thereby obtain an enediamine, which is reduced to thereby obtain a mixture comprising the antidegradant compound.

Methods of making compounds having antidegradant and antifatigue efficacy

Processes for mixing a filler with a rubber blend containing at least one isoprene elastomer and one butadiene elastomer are provided. Preferably, the processes include the steps of: combining elastomers or a blend of elastomers, a carbon black and/or silica filler(s) and a quinone diimine antidegradant in a rubber composition; mixing the rubber composition for a viscosity-reducing effective period of time to reduce the viscosity of the composition; and discharging the mixed composition. The compositions are preferably discharged from the mixing vessel at or near a minimum viscosity occurring at a temperature of about 120-160&#xb0; C.

Processes for preparing rubber blend compositions

The invention comprises a composition comprising a combination of carbon black and at least one surface treating agent selected from the group consisting of quinone compounds, quinoneimine compounds and quinonediimine compounds, as well as methods of obtaining the composition and the use of the composition in dispersing carbon black in a natural or synthetic polymer. The composition achieves increased dispersibility and improved mixing characteristics of the carbon black and improved processability of the carbon black containing polymer.

Surface treated carbon black having improved dispersability in rubber and compositions of rubber therefrom having improved processability, rheological and dynamic mechanical properties

Rubber compositions in which the rubber is a halogenated butyl elastomer are crosslinkable by virtue of containing a crosslinking agent such as zinc oxide and an accelerator which is a salt of an organic thiosulfate.

Growing community of inventors

Elyria, OH, United States of America

Frederick Ignatz-Hoover