| abstract |
Abstract of the Disclosure Cyanate esters of 4,4'-[1,3-phenylenebis (1-methylethylidene)] 2,2',6,6'-R-bisphenol when properly catayzed, can be cured at temperatures in the range of about 250° to about 300°F to obtain percent cyclotrimerization of the cyanate ester groups of at least 80 percent. HPP:jf |