Hoechst Celanese Corporation

Triquest LP

Hoechst Clanese Corporation

Keith M Russ

James R Sounik

William W Wilkison, Iii

Michael T Sheehan

Lynn Massarelli

The invention provides a novel process for improving the glass transition temperatures of polymers by partitioning the polymer between immiscible solvents to remove the low molecular weight polymer from the desired product.

Purification means

A process for preparing a poly(hydroxystyrene) which comprises the steps of (a) heating a carbinol under decomposition conditions in the presence of a solvent for a sufficient period of time to form hydroxystyrene, said solvent having a boiling point in substantially the same range as said hydroxystyrene; and (b) polymerizing said hydroxystyrene under suitable polymerization conditions of pressure and temperature and for a sufficient period of time to form poly(hydroxystyrene).

Process for preparing poly(4-hydroxystyrene)

The present invention provides a unique and novel way of producing an acetoxystyrene. In this new process which comprises a single step, a mixture of (a) a carbinol, (b) an acetylating agent, and (c) an acid catalyst is dehydrated under suitable dehydration conditions of temperature and pressure to form said acetoxystyrene.

Process for preparing acetoxystyrene

The present invention provides a unique and novel way of producing vinyl phenols such as p-vinyl phenol (4-hydroxystyrene--HSM). In this new process, p-.alpha.-aminoethylphenol (AEP) is heated under suitable deamination conditions of temperature and pressure and for a sufficient period of time to form the 4-hydroxystyrene (HSM).

Process for preparing 4-hydroxystyrene

The present invention provides a unique and novel way of producing 4-acetoxystyrene. In this new process, 4-hydroxystyrene is acetylated, in the presence of an acetylation agent, under suitable conditions of temperature and pressure and for a sufficient period of time to form acetoxystyrene.

The present invention provides a unique and novel way of producing vinyl phenols such as poly(4-hydroxystyrene) (PHS). In this new process, p-.alpha.-aminoethylphenol (AEP) is heated under suitable conditions of temperature and pressure and for a sufficient period of time to form the poly(4-hydroxystyrene) (PHS).

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Corpus Christi, TX, United States of America

Keith M Russ