Patents by Inventor Michel Erpelding

Michel Erpelding 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).

  • Thermoplastic compositions based on grafted rubber and polyester, a process for their manufacture, and articles obtained therefrom
    Patent number: 5183840
    Abstract: Thermoplastic composition based on a crystalline polyester and a modified vinyl aromatic polymer. It comprises:from 50 to 97% by weight of at least one polymer phase (A) consisting of at least one terpolymer produced by grafting (a) at least one vinyl aromatic monomer and (b) at least one unsaturated nitrile onto (c) at least one rubber, the terpolymer being dispersed in a matrix of a copolymer comprising units derived from (d) at least one unsaturated nitrile and (e) at least one vinyl aromatic monomer, the overall composition of the polymer phase (A) being such that it contains from 17 to 35 parts of unsaturated nitrile, from 10 to 60 parts of rubber, and from 10 to 60 parts of vinyl aromatic monomer per 100 parts by weight of the polymer phase, andfrom 3 to 50% by weight of at least one high molecular weight polybutylene terephthalate (B).
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: February 2, 1993
    Assignee: Societe Chimique des Charbonnages
    Inventors: Michel Erpelding, Jacques Vandome
  • Low gloss talc filled ABS/PC
    Patent number: 5162419
    Abstract: Objects formed by injection molding of molding compositions comprising:(a) 10 to 80 parts by weight of at least one aromatic polycarbonate resin;(b) 90 to 20 parts by weight of a mixture of (b1) 20-99% by weight of a graft copolymer with a rubbery graft base and (b2) 80-1% by weight of a copolymer of (b2i) styrene, alpha-methyl styrene, methyl methacrylate or a mixture thereof and (b2ii) acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide or a mixture thereof and(c) per 100 parts of (a) and (b) together 2-25 parts by weight of talc. By choosing a talc with a mean particle size between 1.5 and 20 micrometers one obtains objects with a mat surface appearance. The dullness of the surface can further be increased by using a graft copolymer with a relatively low grafting efficiency of 0.5 to 50%.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: November 10, 1992
    Assignee: GE Plastics ABS Europe B.V.
    Inventors: Catherine M. M. Pottier-Metz, Michel Erpelding
  • Thermoplastic compositions based on grafted rubber and polyester, a process for their manufacture, and articles obtained therefrom
    Patent number: 4861817
    Abstract: Thermoplastic composition based on a crystalline polyester and a modified vinyl aromatic polymer. It comprises:from 50 to 97% by weight of at least one polymer phase (A) consisting of at least one terpolymer produced by grafting (a) at least one vinyl aromatic monomer and (b) at least one unsaturated nitrile onto (c) at least one rubber, the terpolymer being dispersed in a matrix of a copolymer comprising units derived from (d) at least one unsatured nitrile and (e) at least one vinyl aromatic monomer, the overall composition of the polymer phase (A) being such that it contains from 17 to 35 parts of unsaturated nitrile, from 10 to 60 parts of rubber, and from 10 to 60 parts of vinyl aromatic monomer per 100 parts by weight of the polymer phase, andfrom 3 to 50% by weight of at least one high molecular weight polybutylene terephthalate (B).
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: August 29, 1989
    Assignee: Societe Chimique des Charbonnages
    Inventors: Michel Erpelding, Jacques Vandome