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Dow Global Technolgoies LLC

Ddp Specialty Electronic Materials US, LLC

Christina A Rhoton

Zenon Lysenko

Thomas E Fisk

Mark F Sonnenschein

Steven P Crain

Kshitish A Patankar

Jasson T Patton

Mark T Bernius

John Matthew Warakomski

Xiaoyun Chen

Ludo M Aerts

Bryan E Barton

Eric J Hukkanen

Mark G C Vreys

A formulation system contains: (a) a pre-polymer reaction product of a polymeric isocyanate and a polyether polyol, where: (i) the polymeric isocyanate contains five weight-percent or more methylene diphenyl diisocyanate; (ii) the polymeric isocyanate has a functionality of 3.0 or less; (iii) the polyether polyol is present in the pre-polymer at a concentration of one to 25 weight-percent; (iv) the polyol has an equivalent weight of 50 to 500 grams per equivalent; (v) the &#x2212;NCO concentration of the pre-polymer is 15 to 31 weight-percent; (vi) the pre-polymer is free of isocyanate trimers; (b) a polyester polyol component containing 10 to 25 weight-percent of free glycol; and (c) a blowing agent that contains less than five weight-percent water; where the ratio of pre-polymer and polyester result in foam having a trimer content of 12 to 22 weight-percent, and an &#x2212;NCO index of more than 300 and less than 700.

Polyurethane foam from high functionality polyisocyanate

A formulation system contains: (a) a pre-polymer reaction product of a polymeric isocyanate and a polyether polyol, where: (i) the polymeric isocyanate contains five weight-percent or more methylene diphenyl diisocyanate; (ii) the polymeric isocyanate has a functionality of 3.0 or less; (iii) the polyether polyol is present in the pre-polymer at a concentration of one to 25 weight-percent; (iv) the polyol has an equivalent weight of 50 to 500 grams per equivalent; (v) the &#x2014;NCO concentration of the pre-polymer is 15 to 31 weight-percent; (vi) the pre-polymer is free of isocyanate trimers; (b) a polyester polyol component containing 10 to 25 weight-percent of free glycol; and (c) a blowing agent that contains less than five weight-percent water; where the ratio of pre-polymer and polyester result in foam having a trimer content of 12 to 22 weight-percent, and an &#x2014;NCO index of more than 300 and less than 700.

Disclosed here are processes for preparing carbonized polymers (preferably carbon fibers), comprising sulfonating a polymer with a sulfonating agent that comprises SOdissolved in a solvent to form a sulfonated polymer; treating the sulfonated polymer with a heated solvent, wherein the temperature of the solvent is at least 95&#xb0; C.; and carbonizing the resulting product by heating it to a temperature of 500-3000&#xb0; C. Carbon fibers made according to these methods are also disclosed herein.

Processes for preparing carbon fibers using sulfur trioxide in a halogenated solvent

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Midland, MI, United States of America

Christina A Rhoton