TRANSPARENT COPOLYAMIDES AND THEIR USE FOR THE SIETING OF OPTICAL FIBERS AND THE MANUFACTURE OF MOLDED OBJECTS

摘要

THE INVENTION CONCERNS NEW TRANSPARENT COPOLYAMIDES, OBTAINED FROM ALKYL DERIVATIVES OF BIS- (4-AMINO-CYCLOHEXYL) -METHANE AND POSSIBLE OTHER DIAMINES, AND ISOPHTHALIC ACID AND POSSIBLY OF TEREXYBOXYLIC ACID OR DEREPHTHALIC ALIPHATICS, AND OTHER INGREDIENTS OF POLYAMIDES AND CONTAINING 6 OR MORE CARBON ATOMS. THESE COPOLYAMIDES CAN BE OBTAINED BY POLYCONDENSATION, USING BIS- (4-AMINO-3-METHYL-5-ETHYL-CYCLOHEXYL) -METHANE IN THE FORM OF A SELECTED MIXTURE OF ISOMERS, WHICH PREFERABLY CONTAIN ISOMERS AND ISOMERS CISTRANS. /P P THE NEW TRANSPARENT COPOLYAMIDES ACCORDING TO THE INVENTION ARE PARTICULARLY SUITABLE FOR THE CLADDING OF OPTICAL FIBERS AND THE INJECTION MOLDING OF MOLDED OBJECTS.