Patents by Inventor Mark R. Southcott

Mark R. Southcott 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).

  • Patent number: 5478915
    Abstract: Polyimide oligomers are described which comprise the condensation product of: at least one phenylindane diamine and at least one aromatic bis(ether anhydride). The polyimide oligomers of the invention are readily processed to form solution prepregable polyimide composites having high glass transition temperatures and high temperature and oxidative stability. More particularly, the present invention provides for crosslinkable polyimide oligomers prepared by reacting, in a suitable solvent under an inert atmosphere, a mixture of monomers comprising: (A) an aromatic diamine component comprising from about 25 to 100 mole % of at least one phenylindane diamine; (B) a dianhydride component comprising from about 25 to 100 mole % of at least one aromatic his(ether anhydride); and (C) at least one end-cap monomer selected from the group consisting of monoanhydrides, acyl halides and aromatic amines, wherein each end-cap monomer contains at least one crosslinkable functional group in the molecule.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: December 26, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Michael Amone, Mark R. Southcott
  • Patent number: 5026871
    Abstract: The invention provides a compound of the general formula I ##STR1## in which R.sub.1 is hydrogen or methyl and R.sub.2 is C.sub.1 -C.sub.12 alkyl, preferably methyl or ethyl.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: June 25, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Mark R. Southcott
  • Patent number: 5025084
    Abstract: A polyimide-forming composition comprising(A) a polycarboxylic acid partial ester of formulaHOOC--R.sup.1 --COOR.sup.2 Iwhere R.sup.1 denotes a divalent ethylenically unsaturated aliphatic or cycloaliphatic group of 2 to 20 carbon atoms, and R.sup.2 denotes the residue, after removal of a hydroxyl group, of an alcohol having from 4 to 20 carbon atoms which has a cycloaliphatic, aromatic or heterocyclic ring and is polymerizable on heating in the presence of an acid,(B) a partial ester of formula I above in which R.sup.1 denotes a group of formula II ##STR1## where Ar.sup.1 denotes a tetravalent aromatic group of 6 to 20 carbon atoms linked through aromatic carbon atoms thereof to the indicated carbon atoms, and R.sup.2 is as defined above,(C) an aromatic primary polyamine and(D) a heat-activable substance which releases an acid at a temperature of 100.degree. C. or above.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: June 18, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Bryan Dobinson, Mark R. Southcott