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1. WO1997040076 - METHOD FOR THE PRODUCTION OF PVC PARTICLES

Publication Number WO/1997/040076
Publication Date 30.10.1997
International Application No. PCT/NO1997/000106
International Filing Date 21.04.1997
Chapter 2 Demand Filed 14.11.1997
IPC
C08F 14/06 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
14Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
02Monomers containing chlorine
04Monomers containing two carbon atoms
06Vinyl chloride
C08F 285/00 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
285Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
CPC
C08F 14/06
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
14Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
02Monomers containing chlorine
04Monomers containing two carbon atoms
06Vinyl chloride
C08F 285/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
285Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
Y10S 526/909
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
909Polymerization characterized by particle size of product
Applicants
  • NORSK HYDRO ASA [NO]/[NO] (AllExceptUS)
  • SOMMERVOLD, Viola [NO]/[NO] (UsOnly)
  • BERGE, Arvid [NO]/[NO] (UsOnly)
  • PEDERSEN, Steinar [NO]/[NO] (UsOnly)
  • JACOBSEN, Harald [NO]/[NO] (UsOnly)
  • LETH-OLSEN, Kari-Anne [NO]/[NO] (UsOnly)
  • SÆTHRE, Bård [NO]/[NO] (UsOnly)
Inventors
  • BERGE, Arvid
  • PEDERSEN, Steinar
  • JACOBSEN, Harald
  • LETH-OLSEN, Kari-Anne
  • SÆTHRE, Bård
  • UGELSTAD, John
Agents
  • HOFSETH, Svein
Priority Data
96162523.04.1996NO
Publication Language English (EN)
Filing Language Norvegian (NO)
Designated States
Title
(EN) METHOD FOR THE PRODUCTION OF PVC PARTICLES
(FR) PROCEDE DE PRODUCTION DE PARTICULES EN PVC
Abstract
(EN)
The present invention concerns a procedure for the production of PVC particles with a narrow size distribution in the range 10-50 $g(m)m, preferably 10-30 $g(m)m, 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 $g(m)m. In a second stage, another vinyl monomer or mixture of monomers is swelled into the polymer/oligomer seed particles and polymerisation takes place in such a way that they grow into polymer particles of the desired size. It is preferable to use aromatic vinyl monomers or acrylates as the monomer in the seed particles. The seed particles in the first stage can be produced in a two-stage swelling process or by dispersion polymerisation.
(FR)
La présente invention concerne un procédé de production de particules en PVC présentant une distribution granulométrique étroite, de l'ordre de 10 à 50$g(m)m, de préférence de l'ordre de 10 à 30 $g(m)m, lequel procédé consiste, dans une première étape, à polymériser un monomère vinylique ou un mélange de monomères, afin d'obtenir une particule germe de polymère/oligomère dont la dimension est comprise entre 1 à 10 $g(m)m, puis dans une seconde étape à faire gonfler un autre monomère vinylique ou un autre mélange de monomères, dans les particules germes de polymère/oligomère, et à faire en sorte que s'effectue la polymérisation de manière à ce que ces particules germes croissent pour devenir des particules polymères de la dimension voulue. Il est préférable d'utiliser des monomères ou des acrylates vinyliques aromatiques en tant que monomère dans les particules germes. On peut produire les particules germes de la première étape selon un procédé de gonflement en deux étapes ou par polymérisation en dispersion.
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