摘要:
THIS INVENTION RELATES TO THERMOPLASTIC SILOXANE-POLYESTER BLOCK COPOLYMERS HAVING SIOLOXANE BLOCKS THAT ARE LINEAR AND CONTAIN DIHYDROCARBYLSIOLOXANE GROUPS AND POLYESTER BLOCKS THAT ARE LINEAR AND CONTAIN GROUPS DERIVED FROM AROMATIC DICARBOXYLIC ACIDS AND DIOLS. THE BLOCK COPOLYMERS OF THIS INVENTION ARE ELASTOMERIC OR RIGID, DEPENDING ON THEIR SPECIFIC COMPOSITION, EVEN THROUGH THERMOPLASTIC AND HAVE EXCEPTIONAL THERMAL AND OXIDATIVE STABILITY. THE BLOCK COPOLYMERS ARE USEFUL, FOR EXAMPLE, AS MOLDING RESINS AND EXTRUDING RESINS.
WHEREIN Ar and Ar'' are mono- or polynuclear aromatic radicals, and R and R'' are C1 to C20 hydrocarbon radicals These compounds are useful as initiators or activators in the anionic polymerization of lactam monomers.
摘要:
AN ALLOY OF THERMPOLASTIC POLYMER IS PROVIDED BY A BLEND OF (A) A POLYLACTAM-POLYARYLENE POLYETHER BLOCK COPOLYMER AND (B) POLYLACTANS AND/OR POLYARYLENE POLYETHERS.
摘要:
THIOLACTONES ARE UTILIZED AS POLYMERIZATION INITIATORS OR ACTIVATORS WITH ALKALINE CATALYSTS IN THE ANIONIC POLYMERIZATION OF LACTAM MONOMERS SO AS TO PROVIDE FOR A RAPID POLYMERIZATION PROCESS. THE POLYMERS THUS OBTAINED HAVE GOOD PHYSICAL PROPERTIES AND GOOD COLOR.
摘要:
Compounds of the structure WHEREIN Ar is a mono- or polynuclear aromatic radical, and R and R'' are C1 to C20 hydrocarbon radicals. These compounds are useful as initiators or activators in the anionic polymerization of lactam monomers.
摘要:
BLOCK COPOLYMERS ARE PREPARED FROM LACTAM MONOMERS AND POLYARYLENE POLYETHERS. THE POLYMERS ARE PREPARED IN A LACTAM ANIONIC POLYMERIZATION TEACTION USING AN ALKALINE CATALYST AND A POLYARYLENE POLYETHER AS AN ARTIVATOR OR INITIATOR.
摘要:
THIS INVENTION RELATES TO IMPROVED BLOCK COPOLYCARBONATES CONTAINING AN AMORPHOUS, SOFT, RUBBERY SEGMENT OR BLOCK COMPOSED OF LACTONE UNITES AND ANOTHER CRYSTALLINE, HARD THRMOPLASTIC SEGMENT OF BLOCK COMPOSED OF CYCLOBUTYLENE POLYCARBONATE.