摘要:
A polyester filament in which a polyether-polyester block copolymer is dispersed as fine striae along the filament axis, at least one of which is substantially endless. Process for preparing the same includes a melt spinning apparatus with static mixing elements interposed between separate molten polymer feed passageways and spinneret holes.
摘要:
1. A COMPOSITION CURABLE TO A SEALANT COMPRISING (A) A POLY(OXYALKYLENE) - POLYESTER - POLY(MONOSULFIDE)-POLYTHIOL HAVING AN AVERAGE OF MORE THAN TWO MERCAPTO GROUPS PER MOLECULE AND (B) A CHROMATE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL MONOCHROMATES, DICHROMATES, TRICHROMATES AND TETRACHROMATES IN AN AMOUNT SUFFICIENT TO CONVERT AT LEAST ABOUT 70 PERCENT OF THE PENDANT THIOL GROUPS TO POLYSULFIDE GROUPS AND THUS FORM A SEALANT, SAID (A) BEING THE ACIDIC, UNNEUTRALIZED POLYMERIC REACTION PRODUCT OF AT LEAST ONE MERCAPTOALKANOIC ACID, AT LEAST ONE THIODIALKANOIC ACID, AND AT LEAST ONE POLY(OXYALKYLENE)-POLYOL HAVING AN AVERAGE OF MORE THAN TWO HYDROXY GROUPS PER MOLECULE.