Patents Assigned to Produits Chimiques Auxiliaires et de Synthese, P.C.A.S.
  • Liquid precursor for the production of fluorine doped tin oxide coatings and corresponding coating process
    Patent number: 5417757
    Abstract: A liquid precursor for the production of fluorine doped tin oxide coatings including 60 to 90% by weight of at least one chlorinated organotin derivative, 5 to 30% by weight of at least one organotin mono(fluoroalkanoate), and 0 to 15% by weight of a tetraorganotin compound. Using vapor phase deposition, this produces a coating with low surface resistance and a high light transmission coefficient. Deposition is effected quickly so the precursor can readily be used to coat a moving substrate, for example, float glass.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: May 23, 1995
    Assignee: Produits Chimiques Auxiliaires Et De Synthese, (P.C.A.S.) (S.A.)
    Inventors: Gilles Merienne, Dominique Valette, Marcel Durant
  • Process of preparation for the surface protection of zinc against white rust
    Patent number: 5045361
    Abstract: A process for producing an acrylic and/or methacrylic polymer based preparation for the surface treatment of zinc consists in polymerizing at least one (meth)acrylic acid and at least one (meth)acrylate in a mixture of organic cosolvents. The preparation is then formed from the resultant copolymer in the cosolvents by dilution in a quantity of water and preferably an excess of water with respect to the cosolvents in the polymerization stage.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: September 3, 1991
    Assignee: Produits Chimiques Auxiliaires et de Synthese (P.C.A.S.)
    Inventor: Jean P. Kerherve
  • Polymer based preparation for the surface protection of zinc against white rust
    Patent number: 5037877
    Abstract: A process for producing an acrylic and/or methacrylic polymer based preparation for the surface treatment of zinc consists in polymerizing at least one (meth)acrylic acid and at least one (meth)acrylate in a mixture of organic cosolvents. The preparation is then formed from the resultant copolymer in the cosolvents by dilution in a quantity of water and preferably an excess of water with respect to the cosolvents in the polymerization stage.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: August 6, 1991
    Assignee: Produits Chimiques Auxiliaires et de Synthese (P.C.A.S.)
    Inventor: Jean P. Kerherve
  • Method for preparing thienylacetic acids
    Patent number: 4180510
    Abstract: A method for preparing thienylacetic acid and its derivatives is disclosed, wherein a glyoxylic ester is made to react with hydrazine, and after with potash. Advantageously, the glyoxylic ester is prepared by condensation of a monoester monochloride of oxalic acid upon a thiophenic derivative, in the presence of titanium chloride.The so obtained products are useful as organic synthesis intermediaries for various products of pharmaceutical type.
    Type: Grant
    Filed: January 12, 1978
    Date of Patent: December 25, 1979
    Assignee: Produits Chimiques Auxiliaires et de Synthese, P.C.A.S.
    Inventors: Yves Le Guen, Georges Thiault