| | Phthalonitrile resin from diphthalonitrile monomer and amine - Patent 4408035 (Site not responding. Last check: 2007-10-09) |
 | | A phthalontrile resin obtained by admixing a primary amine in an amount from about 1 to about 40 percent of total resin weight with a diphthalonitrile monomer at a temperature from about the melting point of said phthalonitrile monomer to about the decomposition temperature of the resulting resin. |
 | | The resin of claim 4 wherein said amine is selected from the class consisting of meta- and para-phenylenediamine, meta- and para-alkylene dianiline, aminophenyl ether, amino phthalonitrile, cyclohexane bis(alkylamine) wherein said alkyl group has from 1 to 10 carbon atoms, alkylamine or alkyldiamine wherein said alkyl group has from 15 to 25 carbon atoms, and aminophenylsulfone. |
 | | If voids can be tolerated almost any primary amine can be used if enough of the amine is included to compensate for the loss of the amine or a means is provided to recirculate the vaporized amine back through the polymerizing monomer or the polymerization proceeds under pressure. |
| www.freepatentsonline.com /4408035.html (3989 words) |