National Starch and Chemical Corporation

National Starch and Chemical Investment Holding Corporation

Robert D Rossi

Dilip K Ray-Chaudhuri

Steven P Fenelli

A Levent Cimecioglu

John Socrates Thomaides

Danielle E Harkins

Kraig A Luczak

Michele M Merrette

Paper comprising aldehyde modified cellulose pulp having selected aldehyde content. Another embodiment involves a method of preparing celullose aldehydes using selective oxidation with a limited amount of oxidant and a nitroxyl radical mediator and defined reaction conditions to provide oxidized cellulose material with effective aldehyde content making it particularly suitable for use in making paper with desirable wet strength, temporary wet strength and dry strength properties, including compressive strength and resistance.

Aldehyde modified cellulose pulp for the preparation of high strength paper products

This invention relates to paper comprising aldehyde modified cellulose pulp prepared using nitroxyl radical mediated oxidation and further containing selected additives comprising aldehyde functional polymers or polymers containing functionality capable of reacting with aldehyde groups and having improved strength properties. This invention further relates to paper made from aldehyde modified cellulose pulp where an hydroxyl group containing polymer is added to the paper to provide wet strength properties.

Method of making paper from aldehyde modified cellulose pulp with selected additives

A multi-step process for the preparation of ethynylbenzaldehydes from bromo- or iodobenzaldehydes is disclosed. The arylhalogen is replaced with a protected ethynyl compound which is subsequently cleaved by base to form the arylacetylene. The aldehydic functionlity is preserved by formation of a corresponding Schiff's base or acetal, and its subsequent regeneration by treatment with aqueous acid.

Process for the preparation of ethynylbenzaldehydes

A multi-step process for the preparation of ethynylbenzaldehydes from bromo- or iodobenzaldehydes is disclosed. The arylhalogen is replaced with a protected ethynyl compound which is subsequently cleaved by base to form the arylacetylene. The aldehydic functionality is preserved by formation of a corresponding Schiff's base or acetal, and its subsequent regeneration by treatment with aqueous acid.

Novel mono- or difunctional phenylacetylene-substituted Schiff's base monomers useful in the preparation of electrically conducting polymers is disclosed. On heating, these monomers melt to a viscous liquid state, and on continued heating above about 300.degree. C. polymerize to form an electrically insulating thermoset polymer. On further post-cure heat treatment, the polymer becomes electroconductive showing a bulk conductivity of at least 10.sup.-2 S/cm.

Phenylacetylene-substituted Schiff's base monomers and electroconductive

Novel acrylic adhesive compositions are prepared comprising an acrylic or substituted acrylic monomer and a normal poyimide or polyisomide bis-acetylene additive.

High temperature stable acrylic adhesive compositions employing aromatic

Maleated aminophenoxysiloxanes are prepared by reacting diaminodiphenoxysiloxanes with maleic anhydride. In addition, the resultant maleamic acid derivatives may be cyclized yielding isomaleimide or maleimide siloxane derivatives.

Maleated siloxane derivatives

Novel anaerobic curing compositions prepared containing polymerizable (meth)acrylate monomers, free radical initiators and, as a polymerizable activators therefor, monomeric disulfonimides.

Anaerobic adhesives containing polymerizable activators

Novel curing compositions are prepared comprising an acrylic or substituted acrylic monomer and a normal polyimide or polyisoimide bis-acetylene additive.

High temperature stable adhesive compositions employing aromatic

The invention provides disulfonimide compounds of the general formula ##STR1## wherein X is bromine, chlorine or iodine; R is hydrogen or methyl; and R' is alkyl, aryl or substituted aryl. The compounds are useful as activators for anaerobic adhesive compositions and also as intermediates in the preparation of monomers of the general formula ##STR2## wherein R and R' are as defined above. The monomers are polymerizable to form homo- and copolymers useful in the photographic industry as well as in formulating anaerobic adhesive compositions.

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Levittown, PA, United States of America

Robert D Rossi