Abstract 1. A PROCESS FOR INCREASING THE MOLECULAR WEIGHT OF POLYESTER RESINS WHICH CONSISTS ESSENTIALLY OF STRAIN HARDENING A SHAPED ORIENTABLE THERMOPLASTIC SOLID RESIN CONTAINING LINEAT POLYMERS OF ESTERS OF AT LEAST ONE DIHYDRIC ALCOHOL AND AT LEAST ONE CARBOCYLIC DICARBOXYLIC ACID BY STRETCHING, AT A TEMPERATURE BETTWEEN ABOUT 50*C. AND ABOUT 240*C., SAID RESIN SUFFICIENTLY TO SUBSTANTIALLY INCREASE ITS STICKING TEMPERATURE AND THEREAFTER SUBJECTING SAID STRAIN-HARDENED RESIN IN THE SOLID STATE TO POLYCONDENSATION CONDITIONS IN THE PRESENCE OF A SUITABLE POLYMERIZATION CATALYST WHEREIN THE RESIN IS MAINTAINED AT A TEMPERATURE OF FROM ABOUT 200*C. TO ABOUT 270*C. AND A PRESSURE OF FROM ABOUT 0.001 MM. TO ABOUT 1000 MM. OF MERCURY FOR A PERIOD OF AT LEAST 10 MINUTES TO ABOUT 48 HOURS AND SUFFICIENT TO SUBSTANTIALLY INCREASE THE MOLECULAR WEIGHT OF SAID RESIN; IN WHICH AN INERT HEATRESISTANT ANTICAKING AGENT IS DISTRIBUTED ON THE SURFACE OF SAID SOLID RESIN PRIOR TO REACHING THE MAXIMUM TEMPERATURE EMPLOYED IN POLYCONDENSATION.
A PROCESS FOR INCREASING THE MOLECULAR WEIGHT OF POLYESTER RESINS WHICH CONSISTS ESSENTIALLY OF STRAIN HARDENING A SHAPED ORIENTABLE THERMOPLASTIC SOLID RESIN CONTAINING LINEAT POLYMERS OF ESTERS OF AT LEAST ONE DIHYDRIC ALCOHOL AND AT LEAST ONE CARBOCYLIC DICARBOXYLIC ACID BY STRETCHING, AT A TEMPERATURE BETTWEEN ABOUT 50*C. AND ABOUT 240*C., SAID RESIN SUFFICIENTLY TO SUBSTANTIALLY INCREASE ITS STICKING TEMPERATURE AND THEREAFTER SUBJECTING SAID STRAIN-HARDENED RESIN IN THE SOLID STATE TO POLYCONDENSATION CONDITIONS IN THE PRESENCE OF A SUITABLE POLYMERIZATION CATALYST WHEREIN THE RESIN IS MAINTAINED AT A TEMPERATURE OF FROM ABOUT 200*C. TO ABOUT 270*C. AND A PRESSURE OF FROM ABOUT 0.001 MM. TO ABOUT 1000 MM. OF MERCURY FOR A PERIOD OF AT LEAST 10 MINUTES TO ABOUT 48 HOURS AND SUFFICIENT TO SUBSTANTIALLY INCREASE THE MOLECULAR WEIGHT OF SAID RESIN; IN WHICH AN INERT HEATRESISTANT ANTICAKING AGENT IS DISTRIBUTED ON THE SURFACE OF SAID SOLID RESIN PRIOR TO REACHING THE MAXIMUM TEMPERATURE EMPLOYED IN POLYCONDENSATION.
Claim 2
Dependent Claim
158 words
A PROCESS FOR INCREASING THE MOLECULAR WEIGHT OF POLYESTER RESINS WHICH CONSISTS ESSENTIALLY OF STRAIN HARDENING A SHAPED ORIENTABLE THERMOPLASTIC SOLID RESIN CONTAINING LINEAT POLYMERS OF ESTERS OF AT LEAST ONE DIHYDRIC ALCOHOL AND AT LEAST ONE CARBOCYLIC DICARBOXYLIC ACID BY STRETCHING, AT A TEMPERATURE BETTWEEN ABOUT 50*C. AND ABOUT 240*C., SAID RESIN SUFFICIENTLY TO SUBSTANTIALLY INCREASE ITS STICKING TEMPERATURE AND THEREAFTER SUBJECTING SAID STRAIN-HARDENED RESIN IN THE SOLID STATE TO POLYCONDENSATION CONDITIONS IN THE PRESENCE OF A SUITABLE POLYMERIZATION CATALYST WHEREIN THE RESIN IS MAINTAINED AT A TEMPERATURE OF FROM ABOUT 200*C. TO ABOUT 270*C. AND A PRESSURE OF FROM ABOUT 0.001 MM. TO ABOUT 1000 MM. OF MERCURY FOR A PERIOD OF AT LEAST 10 MINUTES TO ABOUT 48 HOURS AND SUFFICIENT TO SUBSTANTIALLY INCREASE THE MOLECULAR WEIGHT OF SAID RESIN; IN WHICH AN INERT HEATRESISTANT ANTICAKING AGENT IS DISTRIBUTED ON THE SURFACE OF SAID SOLID RESIN PRIOR TO REACHING THE MAXIMUM TEMPERATURE EMPLOYED IN POLYCONDENSATION.