摘要:
Polycarbonates are heat stabilized by the incorporation of a dioxolane compound having a boiling point greater than about 250.degree. C. The amount of dioxolane compound used is from 100 to 10,000 parts per million.
摘要:
Thermoplastic polycarbonates are prepared by interfacial polymerization wherein carbonyl halides, dihydric phenols and a catalytic amount of a 1,1-dimethyl urea compound is reacted.The polycarbonates thus prepared are useful as moldable resins in a manner well known in the art.