Patents by Inventor Paolo Iengo

Paolo Iengo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aqueous compositions containing perfluoropolyether di-carboxylic salts for the oleo-repellent paper treatment
    Patent number: 7666940
    Abstract: Aqueous dispersions comprising a mixture of: A) from 0.05% by weight to 10% by weight of salts of perfluoropolyether di-carboxylic derivatives having formula: T-O—Rf-T??(IA) wherein T=—CF2—COOZ or —CF2CF2—COOZ wherein Z=Na, K, NH4, R1(R2)(R3)N wherein R1=R2=alkyl or hydroxyalkyl, R3=H, alkyl or hydroxyalkyl, Rf is a (per)fluoropolyoxyalkylene chain having number average molecular weight between 500 and 10,000. B) from 0.01% to 5% by weight of water-dispersible or water-soluble cationic polymers, having a charge density, defined as number of equivalents per weight unit of dry polymer, higher than 1 meq/g of dry polymer.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: February 23, 2010
    Assignee: Solvay Solexis S.p.A.
    Inventors: Paolo Iengo, Mahesh Padigala, Piero Gavezotti
  • Use for the oleo-repellent paper sizing of carboxylic perfluoropolyethers
    Patent number: 7534323
    Abstract: Use for the oleo-repellent paper sizing of carboxylic perfluoropolyethers of formula T-O—Rf-T??(I) wherein T=—CF2—COOH or —CF2CF2—COOH and Rf is a (per)fluoropolyoxyalkylene chain.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: May 19, 2009
    Assignee: Solvay Solexis, S.p.A.
    Inventors: Paolo Iengo, Piero Gavezotti
  • Methods for paper sizing with fluorinated polymers
    Patent number: 7323084
    Abstract: Use for the paper sizing of aqueous polyurethane dispersions from (per)fluoropolyethers obtainable by reaction among the following compounds: a) (per)fluoropolyether diols having a number average molecular weight from 400 to 5,000; b) diisocyanates having formula: OCN—R—NCO??(VIa) ?wherein R is an aliphatic, cycloaliphatic bifunctional radical; or an aromatic bifunctional radical; c) diols containing one carboxylic function and optionally one or both the following components: d) hydrazine and/or aliphatic diamines; e) monofunctional hydroxylic (per)fluoropolyethers having a number average molecular weight in the range 300-1,000.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: January 29, 2008
    Assignee: Ausimont S.p.A.
    Inventors: Stefano Turri, Tania Trombetta, Paolo Iengo
  • Aqueous compositions containing perfluoropolyether di-carboxylic salts for the oleo-repellent paper treatment
    Publication number: 20070221348
    Abstract: Aqueous dispersions comprising a mixture of: A) from 0.05% by weight to 10% by weight of salts of perfluoropolyether di-carboxylic derivatives having formula: T-O—Rf-T??(IA) wherein T=—CF2—COOZ or —CF2CF2—COOZ wherein Z=Na, K, NH4, R1(R2)(R3)N wherein R1=R2=alkyl or hydroxyalkyl, R3=H, alkyl or hydroxyalkyl, Rf is a (per)fluoropolyoxyalkylene chain having number average molecular weight between 500 and 10,000. B) from 0.01% to 5% by weight of water-dispersible or water-soluble cationic polymers, having a charge density, defined as number of equivalents per weight unit of dry polymer, higher than 1 meq/g of dry polymer.
    Type: Application
    Filed: February 10, 2006
    Publication date: September 27, 2007
    Inventors: Paolo Iengo, Mahesh Padigala, Piero Gavezotti
  • Use for the oleo-repellent paper sizing of carboxylic perfluoropolyethers
    Publication number: 20050000668
    Abstract: Use for the oleo-repellent paper sizing of carboxylic perfluoropolyethers of formula T-O—Rf-T tm (I) wherein T=-CF2—COOH or —CF2CF2—COOH and Rf is a (per)fluoropolyoxyalkylene chain.
    Type: Application
    Filed: June 2, 2004
    Publication date: January 6, 2005
    Inventors: Paolo Iengo, Piero Gavezotti
  • Dispersions of fluorinated polymers
    Publication number: 20030136533
    Abstract: Use for the paper sizing of aqueous polyurethane dispersions from (per)fluoropolyethers obtainable by reaction among the following compounds:
    Type: Application
    Filed: June 28, 2002
    Publication date: July 24, 2003
    Applicant: Ausimont S.p.A.
    Inventors: Stefano Turri, Tania Trombetta, Paolo Iengo