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1. WO2020114714 - PROCESS FOR PREPARING POLYMERIC PARTICLES

Publication Number WO/2020/114714
Publication Date 11.06.2020
International Application No. PCT/EP2019/080788
International Filing Date 11.11.2019
IPC
C08F 2/22 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
2Processes of polymerisation
12Polymerisation in non-solvents
16Aqueous medium
22Emulsion polymerisation
C08F 120/06 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
120Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
04Acids; Metal salts or ammonium salts thereof
06Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
C08F 120/18 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
120Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
10Esters
12of monohydric alcohols or phenols
16of phenols or of alcohols containing two or more carbon atoms
18with acrylic or methacrylic acids
C08F 220/06 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
220Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
04Acids; Metals salts or ammonium salts thereof
06Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
C08F 220/18 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
220Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
10Esters
12of monohydric alcohols or phenols
16of phenols or of alcohols containing two or more carbon atoms
18with acrylic or methacrylic acids
A61K 9/28 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
20Pills, lozenges or tablets
28Dragees; Coated pills or tablets
CPC
A61K 47/32
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
47Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
30Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
32Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers ; , poly(meth)acrylates, or polyvinyl pyrrolidone
C08F 2/001
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
2Processes of polymerisation
001Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer
C08F 2/22
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
2Processes of polymerisation
12Polymerisation in non-solvents
16Aqueous medium
22Emulsion polymerisation
C08F 220/14
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
220Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
10Esters
12of monohydric alcohols or phenols
14Methyl esters ; , e.g. methyl (meth)acrylate
Applicants
  • EVONIK OPERATIONS GMBH [DE]/[DE]
Inventors
  • ASSMUS, Manfred
  • ENDRES, Thomas
Agents
  • EVONIK PATENT ASSOCIATION
Priority Data
18210330.905.12.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR PREPARING POLYMERIC PARTICLES
(FR) PROCÉDÉ POUR LA PRÉPARATION DE PARTICULES POLYMÈRES
Abstract
(EN)
The invention relates to a process for preparing polymeric particles, comprising polymerized units of methacrylic acid and further monomers, with an overall monomer composition by weight comprising polymerized units of 5 to 25 % by weight methacrylic acid and 75 to 95 % by weight of further monomers, wherein the further monomers are selected from C1- to C4-alkylesters of methacrylic acid and/or C1- to C4-alkylesters of acrylic acid, by stepwise or gradient emulsion polymerization, wherein the ratio by weight of polymerized units of methacrylic acid to further monomers is increasing stepwise or in a gradient from the center to the surface of the particles and wherein the polymeric particles are obtained in the form of an aqueous dispersion.
(FR)
L'invention concerne un procédé pour la préparation de particules polymères, comprenant des motifs polymérisés d'acide méthacrylique et d'autres monomères, une composition globale en monomères en poids comprenant des motifs polymérisés d'acide méthacrylique à raison de 5 à 25 % en poids et d'autres monomères à raison de 75 à 95 % en poids, les autres monomères étant choisis parmi les alkylesters en C1 à C4 d'acide méthacrylique et/ou les alkylesters en C1 à C4 d'acide acrylique, par polymérisation en émulsion progressive ou par gradient, le rapport en poids entre les motifs polymérisés d'acide méthacrylique et les autres monomères augmentant progressivement ou selon un gradient du centre à la surface des particules et les particules polymères étant obtenues sous la forme d'une dispersion aqueuse.
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