Hercules Corporation

Eastman Chemical Company

John N Kostas

Andrew Bell

Paquita Erazo-Majewicz

Laura M Babcock

Zu-Feng Xu

Dennis G Morrell

Amy M Blough

Thomas P Bejger

Pong-Kuen P Kuo

Jashawant M Modi

Fluorinated solid acids and supported fluorinated solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be removed from the fluorinated solid acid catalyst and/or supported fluorinated solid acid catalyst prior to use. Resins with softening points (Ring and Ball) in the range of about 5&deg; C. to 170&deg; C. can be prepared. These catalysts offer advantages over the traditional Friedel-Crafts polymerization catalysts since the acid sites are an integral part of the solid. The fluorinated solid acid catalysts and supported fluorinated solid acid catalysts are relatively nonhazardous, reusable catalysts which eliminate or at least reduce contamination of the resulting resin products with acid residues or by-products.

Flourinated solid acids as catalysts for the preparation of hydrocarbon resins

Disclosed is a liquid, boron-containing, inorganic oxide resin containing unsaturated organic groups. The resin can additionally comprise the units .brket open-st.M-O.brket close-st., where M can vary from one unit to the next and is selected from Si, Ti, Al, Ba, Zr, Li and Hf. Also disclosed is a process for inhibiting the oxidation of carbon-carbon composites by impregnating the composite with such resins, cross-linking the resin and pyrolyzing to convert the resin to a ceramic material.

Inorganic oxide resins for internal oxidation inhibition of

Cyclic polysiloxanes are produced by continuously passing a feed comprising linear polysiloxanes through a reactor containing a solid acidic catalyst at a pressure greater than one atmosphere under an inert atmosphere to produce a mixture comprising volatile cyclic polysiloxanes, nonvolatile reaction products, and unreacted linear polysiloxanes. The volatile products can then be recovered, and the nonvolatile reaction products and unreacted linear polysiloxanes can be added to the linear polysiloxane feed to form a recycle stream that is passed back through the reactor. Recycling increases the yield of the desired cyclic species.

Process for preparing cyclic polysiloxanes from linear polysiloxanes

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Claymont, DE, United States of America

John N Kostas