Abstract: 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.
Type:
Grant
Filed:
August 17, 1999
Date of Patent:
May 8, 2001
Assignee:
National Starch and Chemical Investment Holding
Corporation
Inventors:
A. Levent Cimecioglu, Danielle E. Harkins
Abstract: A composition for treating keratin substances comprising selected amphoteric polysaccharide derivatives, preferably guar gum which contain a cationic group comprising an amino, ammonium, imino, sulfonium or phosphonium group and an anionic group comprising a carboxyl, sulfonate, sulfate, phosphate or phosphonate group.
Type:
Grant
Filed:
March 18, 1998
Date of Patent:
April 3, 2001
Assignee:
National Starch & Chemical Co. Investment Holding
Corporation
Inventors:
Gary T. Martino, Ian W. Cottrell, Manjit S. Chowdhary, Kimberly A. Koltai
Abstract: Cationic polysaccharide derivatives are prepared by reacting a polysaccharide with a polycationic reagent having one polysaccharide reactive group and at least two cationic groups. Suitable reagents include polycationic alkyl, aryl, alkaryl, cycloaliphatic, or heterocyclic amines, some of which are novel compositions. The polycationic polysaccharide derivatives prepared from these reagents are useful in the manufacture of paper.
Type:
Grant
Filed:
June 1, 1994
Date of Patent:
February 27, 2001
Assignee:
National Starch and Chemical Investment Holding
Corporation
Inventors:
John (Ji-Hsiung) Tsai, Peter T. Trzasko, Michael T. Philbin, Robert L. Billmers, Martin M. Tessler, Joseph A. Van Gompel, Morton W. Rutenberg
Abstract: A polyurethane polymer and method of preparing it is described. The process requires the combination of a soluble polyol with a di- or polyisocyanate under densified fluid conditions. The process to prepare a waterborne polyurethane involves the utilization of a polyol containing ionic or latent ionic groups which must undergo preneutralization before combining with the di- or polyisocyanate under densified fluid conditions. The resulting polyurethane is substantially free of an organic solvent.
Type:
Grant
Filed:
February 14, 1997
Date of Patent:
January 16, 2001
Assignee:
National Starch and Chemical Investment Holding
Corporation
Inventors:
Judith Lynne Kerschner, Sharon Harriott Jureller, John Socrates Thomaides, Robert William Humphreys, Carmine Phillip Iovine
Abstract: A method for making shaped articles at room ambient temperatures without the addition of extraneous heat comprising the sequential steps:(1) forming a plurality of particles comprising a foamed admixture of starch, biodegradable polymer and water;(2) at room ambient temperature, applying to the surface of the particles finely divided drops of unheated water to effect wetting and softening of the outer surfaces of the particles;(3) without the addition of heat, compressing the surfaces of the surface softened particles to effect cohesion between the wetted outer surfaces of the particles, densification of the particles and formation of a shaped article; and(4) without the addition of heat, maintaining the particles under such compression for a time sufficient to render the outer surface of the particles nontacky by adsorption of water into the particles and by evaporation of water from the surface of the particles and(5) forming a protective skin on the outer surface of the compressed, non-tacky particles by h
Type:
Grant
Filed:
April 10, 1997
Date of Patent:
August 22, 2000
Assignee:
Environmental Packing LP
Inventors:
Randall Vann Redd, Don Boyd Schiewetz, Donald Mark Cyron