Fremgangsmate for fremstilling av PVC-partikler, anvendelse av PVC-partiklene, samt PVC-partiklene som sadan

A procedure for the production of PVC particles with a narrow size distribution in the range 10-50 mum, preferably 10-30 mum, in which, in a first stage, a vinyl monomer or a mixture of monomers is polymerised to form a polymer/oligomer seed particle in the range 1-10 mum. In a second stage, another...

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Bibliographische Detailangaben
Hauptverfasser:	PEDERSEN STEINAR, SAETHRE BARD, UGELSTAD JOHN, LETH-OLSEN KARI-ANNE, BERGE ARVID T, JACOBSEN HARALD
Format:	Patent
Sprache:	nor
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A procedure for the production of PVC particles with a narrow size distribution in the range 10-50 mum, preferably 10-30 mum, in which, in a first stage, a vinyl monomer or a mixture of monomers is polymerised to form a polymer/oligomer seed particle in the range 1-10 mum. In a second stage, another vinyl monomer or mixture of monomers is swelled into the polymer/oligomer seed particles and polymerisation takes place in such a way that they grow into polymer particles of the desired size. It is preferable to use aromatic vinyl monomers or acrylates as the monomer in the seed particles. The seed particles in the first stage can be produced in a two-stage swelling process or by dispersion polymerisation.