Abstract:
a) Herstellung von Präpolymerisatperlendurch eine erste Suspensionspolymerisation einer Styrolmonomere und partikelförmige Additive enthaltenden wässrigen Suspen- sion, b)Abtrennung der Präpolymerisatperlen, c)gegebenenfalls Aufteilen der Präpolymerisatperlenin Fraktionen unterschiedlicher Partikelgröße und Auswählen einer oder mehrerer Fraktionen für nachfolgende Stu- fen, d) Herstellen einer wässrigen Suspension der Präpolymerisatperlenund Durchführung mindestens einer zweiten Suspensionspolymerisation in Gegenwart von Treibmittel und unter Dosierung von weiteren Monomeren.
Abstract:
An oligomeric resin adduct, compositions comprising the oligomeric resinadduct, and process for making oligomeric resin adduct, wherein the the process includes charging into a reactor a mixture including a vinylic monomer that includes a styrenic monomer, a (meth)acrylic monomer, or a mixture thereof; a polymerization initiator; and optionally a reaction solvent; maintaining the reactor at a temperature sufficient to produce an oligomeric resin from the vinylic monomer; maintaining the vinylic monomer, the polymerization initiator, and optionally the reaction solvent at a sufficient amount to produce the oligomeric resin, wherein the oligomeric resin contains at least one terminal olefinic unsaturation; and reacting the oligomeric resin with a compound of Formula I, Formula II, or a mixture thereof as defined herein.
Abstract:
Styrolpolymerisatperlen, dadurch gekennzeichnet, dass die Styrolpolymerisatperlen 0,5 bis 5 Gew.-% eines oder mehrerer Hochtemperaturperoxide enthalten, wobei die Hochtemperaturperoxide eine Halbwertszeit von 1 Stunde im Bereich von 110 bis 160°C, gemessen im Cumene, aufweisen.
Abstract:
The invention relates to styrene polymer beads, characterized in that the styrene polymer beads contain 0.5 to 5 wt % of one or more high-temperature peroxides, wherein the high-temperature peroxides have a half-value period of one hour in the range of 110 to 160⁰C, measured in cumene.
Abstract:
The invention relates to a method for producing expandable styrene polymers containing particulate additives, said method comprising the following steps: a) producing prepolymer pellets by means of a first suspension polymerization of an aqueous suspension containing styrene monomers and particulate additives; b) separating the prepolymer pellets; c) optionally dividing the prepolymer pellets into fractions of different particle size and selecting one or more fractions for subsequent steps; d) producing an aqueous suspension of the prepolymer pellets and performing at least one second suspension polymerization in the presence of blowing agent and while metering additional monomers.