Patents by Inventor Angelo Bresciani

Angelo Bresciani 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).

  • Crosslinked polyacrylic acids having low solvent residue, a process for the preparation thereof and the use thereof as thickening agents
    Patent number: 5342911
    Abstract: A crosslinked acrylic acid polymer or crosslinked acrylic acid copolymer consisting of at least 80% of acrylic acid and containing less than 5 ppm of methylene chloride obtained by a process comprising the radicalic polymerization of monomers in a solvent mixture consisting of a mixture of methylene chloride and a carboxylic ester having formulaR--COO--R.sub.1wherein R is hydrogen, methyl or ethyl group, R.sub.1 is C.sub.1 -C.sub.3 alkyl group, wherein said solvent mixture consists of 60-75% v/v of methylene chloride and 40-25% v/v of carboxylic ester, or, alternatively, dimethyl or diethylcarbonate is used instead of the carboxylic ester, together with a cross-linking agent, in an amount from 0.3 and 4% w/w, calculated on the monomer, and an appropriate free radical initiator as catalyst at a temperature ranging from 35.degree. C. and reflux temperature. The polymers and copolymers are useful as thickening agents for cosmetic and pharmaceutical formulations.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: August 30, 1994
    Assignee: 3V Inc.
    Inventor: Angelo Bresciani
  • Synthetic thickeners, obtained by water-in-oil emulsion polymerization, having improved characteristics for the use in textile printing
    Patent number: 5162474
    Abstract: The preparation and use of water-soluble or water-swellable copolymers by polymerization in water-in-oil emulsions of an olephinically unsaturated acid, a salt thereof, a multifunctional monomer, acrylonitrile and optionally a monomer with hydrophilic functional groups.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: November 10, 1992
    Assignee: Sigma Prodotti Chimici S.p.A.
    Inventor: Angelo Bresciani
  • Removal of residual solvent from acrylic acid polymer
    Patent number: 5093472
    Abstract: The present invention relates to an acrylic acid synthetic polymer, said polymer being cross-linked, having high molecular weight and containing 56% to 68% by weight carboxy groups (--COOH), characterized in that it contains no more than 10 ppm solvent; and to a process for the preparation thereof.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: March 3, 1992
    Assignee: Sigma Prodotti Chimici S.r.l.
    Inventor: Angelo Bresciani