摘要:
Thermoplastische Formmasse, hergestellt durch Copolymerisation von α-Methylstyrol, Acrylnitril und Acrylamid sowie deren Mischung mit ABS-Pfropfkautschuk.
摘要:
Para-methylstyrene is polymerized under free-radical conditions in the presence of a polyol to give grafted polymeric polyols which are suitable for use in the production of polyurethane foams.
摘要:
The invention relates to a process for the preparation of a copolymer of alpha-methylstyrene and acrylonitrile in aqueous dispersion, in the presence of a compound supplying free radicals, in which process not all of the reaction heat released during the polymerization is removed by means of cooling, so that the rate of monomer conversion has a maximum. The object of the invention is to obtain a product having an improved heat resistance. According to the invention this process is characterized in that during the polymerization the temperature of the aqueous dispersion is not allowed to become higher than 110 °C, and in that the mean rate of temperature rise per hour is kept at a value below 60 °C per hour.
摘要:
Bei einem Verfahren zur Herstellung von Copolymerisaten aus α-Methylstyrol und Acrylnitril werden relativ langsam zerfallende, eine Azogruppierung enthaltende Initiatoren unter solchen Bedingungen angewendet, daß die Halbwertszeit des radikalischen Zerfalls des Initiators bei diesen Bedingungen