Eastman Chemical Company

Eastman-kodak Company

Theodore R Walker

Jean Carroll Fleischer

William Ronald Darnell

Winston J Jackson, Jr

Burns Davis, Deceased

W Carl Wooten, Jr

This invention relates to a polycarbonate represented by the formula (I):

Process for preparing poly (2,2,4,4-tetramethyl-1,3-cyclobutylene carbonate)

The invention relates to a process of deactivating a polycarbonate, by mixing a polycarbonate having an active alkali metal catalyst residue therein with a deactivator represented of a formula of:

Process for deactivating alkali metal catalyst residues in poly(2,2,4,4-tetramethyl-1,3-cyclobutylene carbonate residues

The invention relates to a process of deactivating a polycarbonate, by mixing a polycarbonate containing an active alkali metal catalyst residue with a carboxylic acid, but not removing the deactivated catalyst. The invention further relates to a process of deactivating a polycarbonate, by mixing a solid state polycarbonate containing an active alkali metal catalyst and a carboxylic acid, followed by heating the mixture of step at a temperature to melt the mixture and deactivate the alkali metal catalyst, wherein the deactivated catalyst is not removed. The invention further relates to a process of making a polycarbonate, by polymerizing a polycarbonate in the presence of an alkali metal catalyst to produce an activated polycarbonate, and mixing the activated polycarbonate with a carboxylic acid to deactivate the alkali metal catalyst and form a polycarbonate, wherein the deactivated alkali metal catalyst is not removed from the polycarbonate. The invention further relates to products made by the processes described above. The invention further relates to polycarbonates containing an alkali metal carboxylate therein.

Process for deactivating polycarbonate catalyst residues

The invention relates to a method for preparing a polycarbonate, by mixing (i) 2,2,4,4-tetramethyl-1,3-cyclobutanediol, (ii) dimethyl carbonate, and (iii) a basic catalyst, and heating components (i)-(iii) to produce an intermediate, followed by heating the intermediate at a temperature of less than or equal to 300.degree. C. to produce the polycarbonate. The invention further relates to the polycarbonates produced by the methods of the present invention.

Process for preparing poly (2,2,4,4-tetramethyl-1,3-cyclobutylene

The invention relates to the compounds having the structures I and II: ##STR1## The invention also relates to a method of making the compound having the structure I by mixing 2,2,4,4-tetramethyl-1,3-cyclobutanediol; dimethyl carbonate; and a basic catalyst, and heating the mixture.

Carbonic acid 3-methoxycarbonyloxy-2,2,4,4-tetramethyl-cyclobutyl ester

This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic acid and a phosphorus pentoxide. The diketones and keto-acids can be used to prepare polyketones which are useful as molding plastics, coatings, films, fibers, and the like.

Process for preparing diketones

This invention relates to a process for preparing an alkylsulfonic anhydride comprising contacting

Process for preparing alkylsulfonic anhydrides

This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic acid and an organic anhydride compound such as methanesulfonic anhydride or trifluoroacetic anhydride. The diketones and keto-acids can be used to prepare polyketones which are useful as molding plastics, coatings, films, fibers, and the like.

Process for preparing diketones and keto-acids

Polyamide resins useful for forming containers having improved resistance to gas permeability comprising the reaction product of

Polyamide with improved gas barrier properties from cyclo-alkylidene

Disclosed is a process for preparation of dialkyl (phenylenedioxy)acetates such as dimethyl (1,3-phenylenedioxy)acetate in high yield. The process involves controlling certain reaction conditions such as order of addition of reactants and rate of addition.

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Kingsport, TN, United States of America

Theodore R Walker