E.i. Dupont De Nemours and Company

Lewis E Manring

Robert Anthony Marin

Larry Ray Marshall

Jack Eugene Armantrout

Robert Ray Burch

Stephen Mazur

Roe C Blume

Michael W West

William G Peet

A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a collector concentric to the rotor. The collector can be a flexible belt moving in the axial direction of the rotor. The collected material can take the form of discrete particles, fibers, plexifilamentary web, discrete fibrils or a membrane.

Rotary process for forming uniform material

A process for esterifying a polymer containing carboxyl(ate) groups, by maintaining the polymer at 0.degree. C. to 200.degree. C. where the counterion for the carboxylate groups is a selected ammonium or sulfoxonium ions. Such processes are useful for preparing improved films and coatings, particularly automotive coatings.

Esterification of carboxylate containing polymers

Quaternary ammonium polyarylamides are provided that are useful in articles of manufacture that require minimal ionic impurities. The polyarylamides are produced by reacting certain polyamides together with quaternary ammonium bases of the formula R.sup.4.sub.4 N.sup.+ X.sup.-, wherein each R.sup.4 is independently selected from hydrocarbyl or substituted hydrocarbyl, provided that at least one of the R.sup.4 groups contains at least one beta hydrogen atom. There is also provided the process for producing the polyarylamides, the process for making articles of manufacture from the polyarylamides, and a process for modifying the surfaces of such polyamides.

Quaternary ammonium polyarylamides, used to manufacture articles and

Polymers of 2,2-disubstituted-3-hydroxypropionic acid, e.g., polymers of .beta.-propiolactone, are employed in ceramic compositions as binders or dispersing agents.

Polymers of 2,2-disubstituted-3-hydroxypropionic acid for ceramic

A process for esterifying a polymer containing carboxyl(ate) groups, by maintaining the polymer at 0.degree. C. to 200.degree. C., where the counterion for the carboxylate groups is a selected ammonium or sulfoxonium ions. Such processes are useful for preparing improved films and coatings, particularly automotive coatings.

Quaternary ammonium polyarylamide

2,2-Dihydrocarbyl-3-propiolactones are prepared by the thermolysis at 175.degree. C. to 350.degree. C. of low molecular weight (oligomeric) poly(3-hydroxy-2,2-dihydrocarbylpropionic acid) that contains carboxyl ends groups, in the presence of alkali metal, ammonium or phosphonium cations. The propiolactones may be polymerized to high molecular weight polymers.

Preparation of 2,2-dihydrocarbyl-3-propiolactones

This invention resides in a counter-current diffusion method for the formation of a metallic interlayer within a matrix, for example, a polymeric matrix, by controlling the permeability of the matrix, the permeability preferably being controlled by controlling matrix swelling.

Patterned metal interlayer in a matrix

This invention relates to counter-current diffusion methods for depositing metals as interlayers within films.

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Wilmington, DE, United States of America

Lewis E Manring