Polycyclo Ring System Having The Cyclic Anhydride As One Of The Cyclos Patents (Class 549/234)
Tetracyclo ring system having the cyclic anhydride as one of the cyclos (Class 549/235)
Tricyclo ring system having the cyclic anhydride as one of the cyclos (Class 549/236)
Bicyclo ring system having the cyclic anhydride as one of the cyclos (Class 549/240)
  • Tricyclo[6.4.0.0.sup.2,7 ]-dodecane-1,8,2,7-tetracarboxylic acid dianhydride and polyimides therefrom
    Patent number: 4360657
    Abstract: Novel polyimides and molding compositions are prepared from tricyclo[6.4.0.0.sup.2,7 ]dodecane-1,8,2,7-tetracarboxylic acid dianhydride. Also a novel dianhydride-,tricyclo[6.4.0.0.sup.2,7 ]dodecane-1,8,2,7-tetracarboxylic acid dianhydride is prepared by a novel photodimerization of 1-cyclohexene-1,2-dicarboxylic anhydride. The polyimides are useful as engineering plastics.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: November 23, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventors: Tayseer S. Nimry, Ellis K. Fields
  • Novel nonaromatic dianhydride and polyimides from tricyclo [4.2.1.0.sup.2,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride
    Patent number: 4358582
    Abstract: Novel polyimides and molding compositions are prepared from novel tricyclo[4.2.1.0.sup.2,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The dianhydride is useful for the manufacture of polyimides which are useful as engineering plastics.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: November 9, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventors: Tayseer S. Nimry, Ellis K. Fields
  • Polyimides from tricyclo dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydride and tricyclo dodecane tetracarboxylic acid anhydride
    Patent number: 4358580
    Abstract: Novel polyimides, copolyimides and molding compositions are prepared from novel dianhydrides such as tricyclo[6.4.0.0.sup.2,7 ] dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydride and tricyclo[6.4.0.0.sup.2,7 ] dodecane-1,8,4,5-tetracarboxylic acid dianhydride. The novel polyimides are useful as engineering plastics. The novel dianhydrides are useful for the preparation of the polyimides. Other dianhydrides can be mixed with our novel dianhydrides to make novel copolyimides useful as engineering plastics.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: November 9, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventors: Tayseer S. Nimry, Ellis K. Fields