摘要:
THERE IS DISCLOSED AND CLAIMED A PROCESS FOR THE PRODUCTION OF CELLULAR PLASTICS FROM POLYAMIDES, WHICH EXHIBIT MELTING RANGES NEAR TO OR ABOVE THEIR DECOMPOSITION TEMPERATURES OR POOR OR NO SOLUBILITY AT ALL IN SOLVENTS OR WHICH EXHIBIT BOTH OF THESE PROPERTIES AT THE SAME TIME, THE PROCESS WHICH COMPRISES PROCESSING POLYAMIDES CARRYING SUBSTITUENTS AT THE AMIDE NITROGEN, FROM THE MELT OR FROM THE SOLUTION AND SPLITTING-OFF PARTIALLY OR TOTALLY THE N-SUBSTITUENTS TO YIELD CELLULAR PLASTICS BY THE FOAMING ACTION OF THE UNSATURATED COMPOUNDS WHICH ORIGINATE FROM THE N-SUBSTITUENTS DURING THE SPLITTING-OFF PROCESS. THIS FOAMING ACTION IS AUGMENTED BY ADDITIONALLY USING FOAMING OR EXPANDING AGENTS AND/OR REDUCING THE PRESSURE DURING THE SPLITTING-OFF PROCESS.
摘要:
THERE ARE DISCLOSED AND CLAIMED NOVEL POLYAMIDES, WHICH ARE OBTAINED BY POLYCONDENSATING (A) BIS-(AMINOMETHYL)-TRICYCLODECANES AND, OPTIONALLY, ALIPHATIC DIAMINES, CYCLOALIPHATIC DIAMINES OR ARALIPHATIC DIAMINES, (B) ALIPHATIC SATRATED OR AROMATIC DICARBOXYLIC ACIDS, AND, OPTIONALLY, (C) ALIPHATIC AMINO-CARBOXYLIC ACIDS, AND THE PROCESS FOR MAKING THE SAME.
摘要:
THERE IS DISCLOSED AND CLAIMED A PROCESS FOR THE PRODUCTION OF SHAPED ARTICLES FROM POLYAMIDES WHICH EXHIBIT MELTING RANGES NEAR TO OR ABOVE DECOMPOSTION TEMPERATURES OR POOR OR NO SOLUBILITY AT ALL IN SOLVENTS OR WHICH XHIBIT BOTH OF THESE PROPERTIES AT THE SAME TIME, THE PROCESS WHICH COMPRISES MOULDING POLYAMIDES CARRYING SUBSTITUENTS OF THE AMIDE NITROGEN AND THUS HAVING REDUCED MELTING RANGES AND/OR IMPROVED SOLUBILITY IN SOLVENTS, AND SEPARATING (SPLITTING-OFF) SAID SUBSTITUENTS PARTIALLY PR TOTALLY DURING AND/OR AFTER MOULDING.
摘要:
THE INVENTION RELATES TO THERMOPLASTIC MOLDING COMPOSITIONS ON THE BASIS OF POLYOXYMETHYLENES CONTAINING BORON NITRIDE AS A NUCLEATING AGENT IN AMOUNTS OF FROM 0.0005 TO 0.04% BY WEIGHT, RELATIVE TO THE TOTAL MIXTURE, AND THE PRODUCTION OF SHAPED ARTICLES WITH IMPROVED PROPERTIES THEREFROM.
摘要:
Thermoplastic block copolyesters comprising linear saturated polyesters and polystyrene-butadiene units which can be moulded into shaped articles having a high dimensional stability, impact strength and bending strength.