Patents Assigned to Groupe Lysac Inc.
  • Polysaccharide phyllosilicate absorbent or superabsorbent nanocomposite materials
    Publication number: 20050214541
    Abstract: The present invention relates to an absorbent or a superabsorbent nanocomposite material comprising a polysaccharide and a phyllosilicate. The polysaccharide component can be a biodegradable polysaccharide that is a self-entangled glass-like polysaccharide or a crosslinked polysaccharide. The phyllosilicate component can be an exfoliation or a semi-exfoliation clay.
    Type: Application
    Filed: September 29, 2004
    Publication date: September 29, 2005
    Applicant: Le Groupe Lysac Inc.
    Inventors: Mohammed Berrada, Stephane Chevigny, Claude Thibodeau
  • Glass-like polysaccharide useful as absorbent for liquids
    Patent number: 6713460
    Abstract: A particulate absorbent, for the absorption of liquids, comprising particles selected from the group consisting of particles of glass-like polysaccharides and of particles of glass-like polysaccharides occluding, in their internal structure, at least one surfactant, said particles: having a size of up to 620 &mgr;m; being at least 70% of a glass-like type structure; and being: 30 to 45% of a size comprised between 620 and 420 &mgr;m; 35 to 55% of a size comprised between 420 and 210 &mgr;m; and 5 to 25% of a size up to 210 &mgr;m. These particulate absorbent is non-hygroscopic, hypoallergenic and biodegradable and useful particularly in biodegradable diapers.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: March 30, 2004
    Assignee: Groupe Lysac Inc.
    Inventors: Serge Huppé, Marie-Elise Maheux, Stéphane Chevigny, Francois Quirion
  • Crosslinked polysaccharide, obtained by crosslinking with substituted polyethylene glycol, as superabsorbant
    Publication number: 20030027787
    Abstract: New crosslinked polysaccharides useful as absorbents or superabsorbents alone or in a mixture are obtained by reacting polysaccharides (preferably containing carboxylates groups) with at least one crosslinker selected in the group constituted by activated polyethylene glycols such as for example halogenated (Cl, Br, I), mesylated, tosylated, or triflated activated polyethylene glycols.
    Type: Application
    Filed: November 9, 2001
    Publication date: February 6, 2003
    Applicant: GROUP LYSAC INC./LYSAC GROUP INC.
    Inventors: Claude Couture, David Bergeron, Frederic Picard
  • Glass-like polysaccharide useful as absorbent for liquids
    Publication number: 20020156048
    Abstract: A particulate absorbent, for the absorption of liquids, comprising particles selected from the group consisting of particles of glass-like polysaccharides and of particles of glass-like polysaccharides occluding, in their internal structure, at least one surfactant, said particles:
    Type: Application
    Filed: April 3, 2002
    Publication date: October 24, 2002
    Applicant: Groupe Lysac Inc./Lysac Group Inc.
    Inventors: Serge Huppe, Marie-Elise Maheux, Stephane Chevigny, Francois Quirion
  • Glass-like polysaccharide useful as absorbent for liquids
    Patent number: 6444653
    Abstract: A particulate absorbent, for the absorption of liquids, comprising particles selected from the group consisting of particles of glass-like polysaccharides and of particles of glass-like polysaccharides occluding, In their internal structure, at least one surfactant, said particles: having a size of up to 620 &mgr;m; being at least 70% of a glass-like type structure; and being: 30 to 45% of a size comprised between 620 and 420 &mgr;m; 35 to 55% of a size comprised between 420 and 210 &mgr;m; and 5 to 25% of a size up to 210 &mgr;m. These particulate absorbent is non-hygroscopic, hypoallergenic and biodegradable and useful particularly in biodegradable diapers.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: September 3, 2002
    Assignee: Groupe Lysac Inc.
    Inventors: Serge Huppé, Marie-Elise Maheux, Stéphane Chevigny, François Quirion