Patents Assigned to Atochem Industriale S.r.l.
  • Patent number: 5637662
    Abstract: This invention relates to a process for the continuous bulk production of acrylic polymers which comprises:a. continuously feeding a polymerization reactor with a reaction mixture containing at least a polymerization adjuvant selected from solvents of the acrylic polymer, preferably from the C.sub.1 -C.sub.10 alkyl esters of organic acids R--COOH, wherein radical R represents a hydrogen atom or an alkyl radical containing from 1 to 6 carbon atoms,b. partially converting the reaction mixture at high temperature, andc. devolatilizing the partially converted polymer at high temperature and reduced pressure.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: June 10, 1997
    Assignee: Atochem Industriale s.r.l.
    Inventors: Pasquale Relvini, Fortunato Airaghi
  • Patent number: 5344901
    Abstract: The present invention relates to a process for preparing acrylic polymers by means of aqueous suspension polymerization in the presence of 0.05-1% by weight, calculated on the suspension, of a stabilizer consisting of a polymer prepared by polymerization of: 60-100% by weight of a salt of a sulphoacrylamide of general formula: ##STR1## 0-40% by weight of at least an acrylic monomer.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: September 6, 1994
    Assignee: Atochem Industriale S.r.l.
    Inventors: Pasquale Relvini, Nicola Anfossi