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1. (WO2002008327) PLASTICIZED WATERBORNE POLYURETHANE DISPERSIONS AND MANUFACTURING PROCESS

Pub. No.:    WO/2002/008327    International Application No.:    PCT/US2001/022578
Publication Date: Fri Feb 01 00:59:59 CET 2002 International Filing Date: Fri Jul 20 01:59:59 CEST 2001
IPC: A61K 8/87
A61Q 5/00
A61Q 17/04
A61Q 19/00
C08G 18/08
C08G 18/10
C08G 18/12
C08G 18/42
C08G 18/66
C08G 18/68
C08G 18/72
C08G 18/73
C08K 5/11
C08K 5/521
Applicants: NOVEON IP HOLDINGS CORP.
Inventors: ANDERLE, Gary, A.
LENHARD, Susan, L.
LUBNIN, Alexander, V.
SNOW, George, E.
TAMARESELVY, Krishnan
Title: PLASTICIZED WATERBORNE POLYURETHANE DISPERSIONS AND MANUFACTURING PROCESS
Abstract:
Waterborne polyurethane dispersions are prepared by reacting (1) at least one polyisocyanate; (2) at least one active hydrogen containing compound, such as a polyol or a polyamide; and (3) optionally, at least one water-dispersability enhancing compound having water-dispersion enhancing groups, in order to form an isocyanate terminated prepolymer. The prepolymer subsequently is (1) optionally neutralized by reaction with at least one neutralizing agent, (2) dispersed in water, and then (3) chain extended by reaction with at least one of water, inorganic or organic polyamine having an average of about 2 or more primary and/or secondary amine groups, or combinations thereof. At least one plasticizer is introduced into the reaction mixture at any time during prepolymer formation or before the prepolymer is dispersed in water. The plasticizer substantially or completely replaces other organic diluents or solvents. The compositions prepared by the process of the present invention are less hazardous, typically have lower modules and higher solids than compositions of the prior art prepared using diluents such as N-methyl-2-pyrrolidone or solvents such as acetone, and are useful in applications such as surgical gloves. However, reaction components can be varied to include reactive plasticizers and other ingredients for preparation of harder materials useful in other articles, or to impregnate, saturate spray or coat papers, non-woven materials, textiles, wood, metals, polymeric articles, and a variety of other substrates. Applications include gloves; papers and non wovens; fibrous materials such as textiles; films, sheets, composites, and other articles; inks and printing binders; flock and other adhesives; and personal care products.