Eastman-Kodak Company

Eastman Chemical Company

Robert P Allen

Randal Ray Ford

Hugh J Hagemeyer, Jr

Vernon Kee Park

Albert C Ruggles

A low molecular weight crystalline homopolypropylene wax of low softening point is disclosed. This homopolypropylene wax is prepared from high molecular weight crystalline polypropylene by thermal degradation in the presence of a relatively high amount of peroxide.

Low softening point homopolypropylene wax

This invention relates to novel hydrocarbon resins and processes for their preparation. More particularly, the invention relates to a liquid hydrocarbon resin prepared by polymerizing norbornene and xylene with a Friedel-Crafts catalyst. The polymerized resin is hydrogenated to provide water white liquid hydrocarbon resins useful as liquid tackifiers in preparing hot-melt adhesive formulations.

Hydrocarbon resin and process for preparation

This invention relates to improved processes for hydrocarbon resin preparation. More particularly, the invention relates to treating the C.sub.5 and higher mixed thermally soaked hydrocarbon fraction mixture obtained in the steam cracking of propane and ethane with alumina prior to polymerizing the hydrocarbon fraction mixture with a Friedel-Crafts catalyst to form a high softening point hydrocarbon resin. The polymerized resin is then quenched or diluted, washed to remove catalyst residues, dried and hydrogenated to provide high softening point hydrocarbon resins.

Process for the preparation of hydrocarbon resins

The present invention relates to a process for the manufacture of 2,2-disubstituted propiolactones via the pyrolysis of methylene diisoalkylate in the vapor phase over a fixed bed catalyst system. The reaction of the invention is as follows: ##SPC1## Wherein R is alkyl of from 1 to 4 carbon atoms and R.sup.1 is alkyl of from 1 to 4 carbon atoms or phenyl. The catalyst comprises an oxide of a metal selected from the group Ag, U, Zn, Ti, Zr, Th, Ta, Nb, Mo, W, and Sn on a suitable support. A preferred catalyst is the metal oxide-silica gel complex which results from heating the calcined residue of a salt of a metal selected from the group consisting of Ta, Ti, Nb and Zr supported upon a silica gel in the presence of nitrogen and steam at a temperature of from about 650.degree. C. to about 1000.degree. C. The process is operable at temperatures from about 240.degree. C. to about 360.degree. C. with contact times ranging from about 0.1 second to about 30.0 seconds. The gaseous ester feed may, if desired, be diluted with an inert gas such as nitrogen and the reactor may be run at atmospheric, or superatmospheric pressure.

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Longview, TX, United States of America

Robert P Allen