Patents Assigned to Larac S.p.A.
  • Patent number: 5069811
    Abstract: Improved compositions for the sulphation-removing cleaning of lithoidal surfaces of prevailingly carbonatic nature, or of layers of such nature on different materials, comprising a mixture of an anion-exchange material (e.g., an anion-exchange resin) with an aqueous solution of ammonium carbonate and/or bicarbonate, and a filler selected from the group consisting of powders and/or fibrils of hydrophilic materials.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: December 3, 1991
    Assignee: Larac S.p.A.
    Inventors: Giuseppe Pizzigoni, Paolo Parrini
  • Patent number: 5068135
    Abstract: Aqueous dispersions of fluorinated polyurethanes obtained by the reaction of an organic diisocyanate with a mixture of diols containing ionizable groups and macroglycols comprising polyols and at least 1% by weight of one or more hydroxy- and/or carboxy-capped fluoropolyethers. Said fluorinated polyurethanes are salified, to transform the ionizable groups into hydrophilic cations and/or anions, and are then dispersed in water to be used in textile coatings.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: November 26, 1991
    Assignees: Ausimont S.p.A., Larac S.p.A.
    Inventors: Ignazio Zavatteri, Tiziana Gambini
  • Patent number: 4983666
    Abstract: Aqueous dispersions of fluorinated polyurethanes obtained by the reaction of an organic diisocyanate with a mixture of diols containing ionizable groups and macroglycols comprising polyols and at least 1% by weight of one or more hydroxy- and/or carboxy-capped fluoropolyethers. Said fluorinated polyurethanes are salified, to transform the ionizable groups into hydrophilic cations and/or anions, and are then dispersed in water to be used in textile coatings.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: January 8, 1991
    Assignees: Ausimont S.p.A., Larac S.p.A.
    Inventors: Ignazio Zavatteri, Tiziana Gambini
  • Patent number: 4686064
    Abstract: Compositions for the desulphatizing cleaning of stone surfaces of prevailingly carbonatic nature or of layers of such nature on different materials, consisting of a mixture of an anion exchange material (for instance an anionic exchange resin) with an aqueous solution of ammonium carbonate and optionally with additives.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: August 11, 1987
    Assignee: Larac S.p.A.
    Inventors: Giuseppe Pizzigoni, Paolo Parrini