National Starch and Chemical Corporation

National Starch and Chemical Investment Holding Corporation

Henry R Hernandez

Wadym Jarowenko

Stephen D Pastor

Daniel B Solarek

Martin M Skoultchi

Teresa A Dirscherl

Donald S Greif

Douglas S Thornton

Albert N Barna

Walter Maliczyszyn

Improved non-crosslinked and non-degraded amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have use as wet-end additives and provide improved drainage properties in the manufacture of paper.

Amphoteric starches and process for their preparation

Improved amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have use as wet-end additives and provide improved drainage properties in the manufacture of paper.

This invention presents a series of blends of ASA-treated and cationic starches for use as external sizes of paper and paperboard products. The blends contain at least 30% (by wt) of the ASA-treated starch, which is a monoester of the starch and an alkyl or alkenyl succinate and, optionally, from about 0.5 to about 5% (by weight based on the starch) of an Al.sup.3+ salt.

Starch blends useful as external paper sizes

A process for the production of paper and paperboard is disclosed wherein water-insensitive starch fibers, produced by extrusion of a starch dispersion into a coagulating solution, are employed to replace all or part of the cellulosic or other pulp conventionally employed. There is also disclosed a method for the incorporation of functional additives into paper during the production thereof; and a method for binding fibers in non-woven webs.

Process for the production of paper containing starch fibers and the

Water-insensitive starch fibers having an amylopectin content of about 55 to 100% by weight are prepared by extruding a colloidal starch dispersion in thread-like form into a moving coagulating bath. Water-insoluble additives may be incorporated into the starch dispersion so as to produce a fiber containing the additive in encapsulated form.

Water insensitive starch fibers and a process for the production thereof

Actinic radiation curable compositions comprise chemically bonded portions of at least one free radical polymerizable hydroxyalkyl ester of an alpha, beta unsaturated carboxylic acid, at least one non-halogenated cyclic anhydride, at least one epoxide and a halogenated free radical initiator which is activatable by actinic radiation. Upon exposure to actinic radiation, these compositions are cured with very little or no inhibition by atmospheric oxygen.

Actinic radiation curable compositions

A photocurable electroconductive coating composition adapted to be crosslinked and insolubilized by actinic radiation comprises an acrylic monomer, a photoactivatable free radical polymerization initiator and a salt of a copolymerizable organic compound, wherein at least one of the monomers contains more than one polymerizable ethylenically unsaturated group. The cured coatings are insoluble in aqueous and organic solvents and are conductors of electricity suitable for conductive underlayers of photoconductive imaging elements and as antistatic coatings.

Photocurable electroconductive coating composition

The use in the manufacture of paper of additives comprising derivatives of starches having particular levels of water fluidity and which contain controlled proportions of cationogenic or cationic substituent groups as well as sulfo-succinate groups. The resulting paper containing the latter additives is characterized by improved retention of pigments and increased strength.

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Somerville, NJ, United States of America

Henry R Hernandez