EP2958955A1 - Composition de microcapsules en forme de particules - Google Patents

Composition de microcapsules en forme de particules

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Publication number
EP2958955A1
EP2958955A1 EP14701095.3A EP14701095A EP2958955A1 EP 2958955 A1 EP2958955 A1 EP 2958955A1 EP 14701095 A EP14701095 A EP 14701095A EP 2958955 A1 EP2958955 A1 EP 2958955A1
Authority
EP
European Patent Office
Prior art keywords
monomers
weight
vinyl
microcapsules
acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14701095.3A
Other languages
German (de)
English (en)
Inventor
Marco Schmidt
Tina SCHRÖDER-GRIMONPONT
Regina Klein
Joachim Pakusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP14701095.3A priority Critical patent/EP2958955A1/fr
Publication of EP2958955A1 publication Critical patent/EP2958955A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C08J3/16—Powdering or granulating by coagulating dispersions
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/203—Solid polymers with solid and/or liquid additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B2009/125—Micropellets, microgranules, microparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2433/00—Use of polymers of unsaturated acids or derivatives thereof, as filler
    • B29K2433/04—Polymers of esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2433/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/54—Aqueous solutions or dispersions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers 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 of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1372—Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2989—Microcapsule with solid core [includes liposome]

Definitions

  • the present invention relates to particulate microcapsule compositions comprising microcapsules and an emulsion polymer obtainable by spray-drying an aqueous microcapsule dispersion, wherein the microcapsules comprise a capsule core and a polymer as capsule wall and the polymer is composed of 30 to 90 wt .-% of one or more monomers (monomers I) selected under
  • Vinyl ester of long-chain fatty acids and / or ethylene in polymerized form as a spray aid. Furthermore, the present invention relates to a process for their preparation and their use for the production of thermoplastic moldings.
  • PCM phase change material
  • Microcapsules in particular, provided their polymeric capsule wall, since an escape of the core material is undesirable, but it would lead to a decrease in the respective effect.
  • Microencapsulated latent heat storage materials are often used as an aqueous dispersion or as a microcapsule powder.
  • the microcapsule powder is generally obtained by spray-drying a microcapsule dispersion. For reasons of better handling, it is customary to use spraying aids which lead to the formation of coarser aggregates of individual capsules during the spray drying.
  • WO 2006/092439 teaches coarse-particle microcapsule powders having an average particle size in the range of 150-400 ⁇ m, which are obtained by spray-drying with water-soluble polymers of the polyvinyl alcohol type and partially hydrolyzed polyvinyl acetates and also methylhydroxypropyl cellulose as spraying auxiliaries. Since subsequent redispersion in an aqueous system is often necessary, only highly water-soluble spray aids are used.
  • WO 2006/077056 teaches granules of microencapsulated latent heat storage material and film-forming polymeric binders having a glass transition temperature in the range of 40 to 120 ° C.
  • the mean particle size of the granules is in the range of 200 ⁇ m to 5 mm, whereby the production of mm-sized granules by extrusion is chiefly described.
  • the production in a fluidized bed granulator is described.
  • WO 2012/069976 teaches the preparation of a thermoplastic molding composition containing microencapsulated latent heat storage materials. According to this teaching, in order to keep the thermal load as low as possible, the microcapsules are fed late in the plasticizing zone of the extruder. The polymer blends obtainable in this way can be used to produce fibers, films and shaped articles.
  • thermoplastic Processing together with a thermoplastic requires the use of micro capsule powder.
  • spray-dried microcapsule powder of the prior art shows that a separation of the microcapsules in the thermoplastic is not observed.
  • microcapsule powder in a dosage form which, on the one hand, permits non-dusty processing of the solid and, on the other hand, is advantageously incorporated into thermoplastics. and in particular leads to the most even distribution of isolated microcapsules.
  • the particulate microcapsule compositions according to the invention are aggregates of microcapsules, the so-called primary particles and the emulsion polymer. Such particles are often referred to as granules or agglomerate.
  • the surface of the particulate microcapsule composition may be uneven or spherical or egg-shaped.
  • the microcapsules used according to the invention comprise a capsule core of lipophilic substance and a capsule wall of polymer.
  • the capsule core is predominantly, more than 90% by weight, of lipophilic substance.
  • the capsule core can be both solid and liquid, depending on the temperature.
  • a protective colloid is generally incorporated into the capsule wall and is therefore likewise part of the capsule wall.
  • the surface of the polymer in particular has the protective colloid.
  • the average particle size D [4,3] of the microcapsules used according to the invention ie the primary particles (volume-weighted average, determined by means of light scattering), is 0.5 to 50 ⁇ m, preferably 0.5 to 20 ⁇ m, in particular from 1 to 10 ⁇ m.
  • the weight ratio of capsule core to capsule wall is generally from 50:50 to 95: 5.
  • Preferred is a core / wall ratio of 70:30 to 93: 7.
  • Lipophilic substances are for example:
  • Aliphatic hydrocarbon compounds such as saturated or unsaturated C10-C40 hydrocarbons which are branched or preferably linear, aromatic hydrocarbon compounds, saturated or unsaturated C6-C30 fatty acids, fatty alcohols and the so-called oxo alcohols, which are obtained by hydroformylation of ⁇ -olefins and further reactions , Ethers of fatty alcohols, C6-C30
  • Fatty amines such as C 1 -C 10 -alkyl esters of fatty acids such as propyl palmitate, methyl steate or methyl palmitate and preferably their eutectic mixtures or methyl cinnamate, natural and synthetic waxes and halogenated hydrocarbons as listed in WO 2009/077525, to the disclosure thereof express reference is made. It is advantageous, for example, the use of pure n-alkanes, n-alkanes having a purity of greater than 90% or of alkane mixtures, as obtained as a technical distillate and are commercially available as such.
  • soluble compounds may be added to the lipophilic substances so as to prevent the crystallization delay which sometimes occurs with the non-polar substances. It is advantageous to use, as described in US Pat. No. 5,456,852, compounds having a melting point 20 to 120 K higher than the actual core substance. Suitable compounds are the fatty acids mentioned above as lipophilic substances, fatty alcohols, fatty amides and aliphatic hydrocarbon compounds. They are added in amounts of from 0.1 to 10% by weight, based on the capsule core.
  • the lipophilic substance is a mixture comprising a wax.
  • the wax with a melting point> 40 ° C is used according to the invention in an amount of 1-5, preferably from 1 to 3 wt .-% based on the total amount of lipophilic substance.
  • Such waxes are described in WO 2012/1 10443, to which reference is expressly made.
  • the addition of the wax with a melting point> 40 ° C prevents the crystallization delay that sometimes occurs with the nonpolar substances.
  • waxes with a melting point> 40 ° C as suitable compounds Sasolwax 6805, British Wax 1357, stearic acid and chloroparaffins are exemplified.
  • the polymers of the capsule wall generally contain at least 30 wt .-%, preferably at least 40 wt .-%, in a particularly preferred form at least 50 wt .-%, in particular at least 55 wt .-%, most preferably at least 70 wt. % and up to 90% by weight, preferably at most 85% by weight and very particularly preferably at most 80% by weight of at least one monomer from the group comprising C 1 -C 24 -alkyl esters of acrylic and / or methacrylic acid, acrylic acid, Methacrylic acid and maleic acid (monomers I), copolymerized, based on the total weight of the monomers.
  • the polymers of the capsule wall contain at least 10 wt .-%, preferably at least 15 wt .-%, preferably at least 20 wt .-% and generally at most 70 wt .-%, preferably at most 60 wt .-% and in a particularly preferred form at most 50% by weight, in particular not more than 45% by weight, of one or more ethylenically unsaturated monomers which have two, three, four or more ethylenically unsaturated radicals (monomers II) copolymerized, based on the total weight of the monomers.
  • the polymers of the capsule wall preferably comprise, as monomers II, monomers having three, four or more ethylenically unsaturated radicals in copolymerized form.
  • the polymers may contain up to 40% by weight, preferably up to 30% by weight, in particular up to 20% by weight, of other monomers III in copolymerized form.
  • the capsule wall is composed only of monomers of groups I and II. Suitable monomers I are Ci-C24-alkyl esters of acrylic and / or methacrylic acid and the unsaturated C3 and C4 carboxylic acids such as acrylic acid, methacrylic acid and maleic acid.
  • Suitable monomers I are isopropyl, isobutyl, sec-butyl and tert-butyl acrylate and the corresponding methacrylates, and particularly preferably methyl, ethyl, n-propyl and n-butyl acrylate and the corresponding methacrylates , Generally, the methacrylates and methacrylic acid are preferred.
  • Suitable monomers I I are ethylenically unsaturated monomers having two, three, four or more ethylenically unsaturated radicals.
  • Ethylenically unsaturated monomers having two, three, four or more ethylenically unsaturated radicals are understood as meaning those which have non-conjugated ethylenic double bonds. They cause a crosslinking of the capsule wall during the polymerization.
  • One or more monomers having two non-conjugated ethylenic double bonds (divinyl monomers) and / or one or more monomers having three, four or more non-conjugated ethylenic double bonds may be copolymerized.
  • Suitable divinyl monomers are divinylbenzene and divinylcyclohexane.
  • Preferred divinyl monomers are the diesters of diols with acrylic acid or methacrylic acid, furthermore the diallyl and divinyl ethers of these diols.
  • Examples which may be mentioned are ethanediol diacrylate, ethylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, methallyl methacrylamide, allyl acrylate and allyl methacrylate.
  • Particularly preferred are propanediol, butanediol, pentanediol and hexanediol diacrylate and the corresponding methacrylates.
  • Preferred monomers having three, four or more nonconjugated ethylenic double bonds are the esters of polyhydric alcohols with acrylic acid and / or methacrylic acid, furthermore the allyl and vinyl ethers of these polyhydric alcohols, trivinylbenzene and trivinylcyclohexane.
  • trimethylolpropane and pentaerythritol are mentioned as polyhydric alcohols.
  • pentaerythritol tetraacrylate is generally present in technical mixtures mixed with pentaerythritol triacrylate and smaller amounts of oligomerization products.
  • those combinations are preferred in which at least 80 wt .-% based on the monomer II, one or more monomers having three, four or more ethylenically unsaturated radicals.
  • Suitable monomers III are other monomers which are different from the monomers I and II, such as vinyl acetate, vinyl propionate, vinylpyridine and styrene, or
  • Methyl styrene as well as particularly preferred monomers itaconic acid, vinylphosphonic acid, maleic anhydride, 2-hydroxyethyl acrylate and methacrylate, acrylamido-2-methylpropanesulfonic acid, methacrylonitrile, acrylonitrile, methacrylamide, N-vinylpyrrolidone, N-methylolacrylamide, N-methylolmethacrylamide, dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate.
  • microcapsules are selected whose capsule wall is built up
  • microcapsules are selected whose capsule wall is built up
  • monoethylenically unsaturated monomers (monomer III), which are different from the monomers I, each based on the total weight of the monomers.
  • microcapsules used according to the invention can be prepared by a so-called in situ polymerization.
  • the principle of microcapsulation is based on that is prepared from the monomers, radical starter, protective colloid and encapsulated lipophilic substance, an oil-in-water emulsion in which the monomers, and the lipophilic substance as a disperse phase.
  • the polymerization of the monomers is initiated by heating and optionally controlled by further increase in temperature, the resulting polymers forming the capsule wall which encloses the lipophilic substance.
  • This general principle is described, for example, in DE-A-10 139 171, to the contents of which reference is expressly made.
  • the microcapsules are prepared in the presence of at least one organic and / or inorganic protective colloid.
  • organic and inorganic protective colloids may be ionic or neutral.
  • Protective colloids can be used both individually and in mixtures of several equally or differently charged protective colloids.
  • the microcapsules are preferably prepared in the presence of an inorganic protective colloid, in particular in combination with an organic protective colloid.
  • Organic protective colloids are preferably water-soluble polymers which reduce the surface tension of the water from 73 mN / m to a maximum of 45 to 70 mN / m and thus ensure the formation of closed capsule walls and microcapsules with preferred particle sizes in the range from 0.5 to 50 ⁇ m. preferably 0.5 to 30 ⁇ particular 0.5 to 10 ⁇ , form.
  • Organic anionic protective colloids are sodium alginate, polymethacrylic acid and their copolymers, the copolymers of sulfoethyl acrylate and methacrylate, sulfopropyl acrylate and methacrylate, N- (sulfoethyl) -maleimide, 2-acrylamido-2-alkylsulfonic acids, styrenesulfonic acid and vinylsulfonic acid.
  • Preferred organic anionic protective colloids are naphthalenesulfonic acid and naphthalenesulfonic acid-formaldehyde condensates and especially polyacrylic acids and phenolsulfonic acid-formaldehyde condensates.
  • Organic neutral protective colloids are, for example, cellulose derivatives such as hydroxyethylcellulose, methylhydroxyethylcellulose, methylcellulose and carboxymethylcellulose, polyvinylpyrrolidone, copolymers of vinylpyrrolidone, gelatin, gum arabic, xanthan, casein, polyethylene glycols, polyvinyl alcohol and partially hydrolyzed polyvinyl acetates and also methylhydroxypropylcellulose.
  • Preferred organic neutral protective colloids are polyvinyl alcohol and partially hydrolyzed polyvinyl acetates and methylhydroxy (C 1 -C 4) alkyl cellulose.
  • Methylhydroxy- (C 1 -C 4) -alkylcellulose is to be understood as meaning methylhydroxy- (C 1 -C 4) -alkylcellulose of very different degrees of methylation, as well as degrees of alkoxylation.
  • the preferred methylhydroxy (C 1 -C 4) -alkylcelluloses have an average degree of substitution DS of 1.1 to 2.5 and a molar degree of substitution MS of 0.03 to 0.9.
  • Suitable methylhydroxy (C 1 -C 4) -alkylcellulose are, for example, methylhydroxyethylcellulose or methylhydroxypropylcellulose. Particularly preferred is methyl hydroxypropyl cellulose.
  • Such methylhydroxy- (Ci-C4) are -alkylcelluloses examples game as available under the tradename Culminal ® of the company Hercules / Aqualon.
  • Inorganic protective colloids are inorganic solid particles so-called Pickering systems.
  • Pickering systems can consist of the solid particles alone or in addition of auxiliaries which improve the dispersibility of the particles in water or the wettability of the particles by the lipophilic phase.
  • auxiliaries which improve the dispersibility of the particles in water or the wettability of the particles by the lipophilic phase.
  • the mode of action and its use is described in EP-A-1 029 018 and EP-A-1 321 182, to the contents of which reference is expressly made.
  • the inorganic solid particles may be metal salts such as salts, oxides and hydroxides of calcium, magnesium, iron, zinc, nickel, titanium, aluminum, silicon, barium and manganese.
  • metal salts such as salts, oxides and hydroxides of calcium, magnesium, iron, zinc, nickel, titanium, aluminum, silicon, barium and manganese.
  • These include magnesium hydroxide, magnesium carbonate, magnesium oxide, calcium oxalate, calcium carbonate, barium carbonate, barium sulfate, titanium dioxide, aluminum oxide, aluminum hydroxide and zinc sulfide.
  • Silicates, bentonite, hydroxyapatite and hydrotalcites are also mentioned. Particular preference is given to SiO 2 -based silicas, magnesium pyrophosphate and tricalcium phosphate.
  • Suitable SiO 2 -based protective colloids are finely divided silicas. They can be dispersed as fine, solid particles in water. But it is also possible to use so-called colloidal dispersions of silica in water. Such colloidal dispersions are alkaline, aqueous mixtures of silica. In the alkaline pH range, the particles are swollen and stable in water. For use of these dispersions as protective colloid, it is advantageous if the pH of the oil-in-water emulsion is adjusted to pH 2 to 7 with an acid. Preferred colloidal dispersions of silica at pH 9.3 have a specific surface area in the range of 70 to 90 m 2 / g.
  • SiO 2 -based protective colloids preference is given to highly disperse silicas whose average particle sizes are in the range from 40 to 150 nm at pH values in the range from 8 to 11. Examples include Levasil® ® 50/50 (HC Starck), Köstrosol ® 3550 (CWK Bad Köstritz), and Bindzil ® mentioned 50/80 (Akzo Nobel Chemicals).
  • a combination of an S1O2-based protective colloid and a methylhydroxy (Ci-C4) -alkylcellulose is used. It has been shown that the combination with a low molecular weight methylhydroxy (Ci-C4) -alkylcellulose leads to advantageous properties.
  • a methylhydroxy- (C 1 -C 4) -alkylcellulose having an average molecular weight (weight average) 50 50 000 g / mol, preferably from the range from 5000 to 50 000 g / mol, preferably from 10 000 to 35 000 g / mol , in particular 20 000 to 30 000 g / mol used.
  • the protective colloids are used in amounts of from 0.1 to 25% by weight, preferably from 0.1 to 20, preferably from 0.5 to 15% by weight, based on the sum of lipophilic substance and monomers.
  • inorganic protective colloids preference is given to amounts of from 0.5 to 20, preferably from 0.5 to 18,% by weight, based on the sum of lipophilic substance and monomers.
  • microcapsules to be used according to the invention is generally known and is described by way of example in DE-A-10 139 171 and application WO 201 1/004006 and WO 2012/1 10443, to which reference is expressly made.
  • microcapsules having an average particle size in the range from 0.5 to 50 ⁇ m the particle size being able to be adjusted in a manner known per se by the shearing force, the stirring speed and the concentration.
  • the present invention further includes the process of preparing the particulate microcapsule compositions by spray drying.
  • Spray drying of the microcapsule dispersion can be carried out in the usual way. in the
  • the procedure is that the inlet temperature of the
  • Drying gas usually nitrogen or air, in the range of 100 to 200 ° C, preferably 120 to 160 ° C, and the starting temperature of the drying gas in the range of 30 to 90 ° C, preferably 60 to 80 ° C.
  • the spraying of the aqueous microcapsule dispersion in the drying gas stream can, for example, by means of Single or multi-fluid nozzles or via a rotating disc.
  • Droplet size at exit is chosen so that a microcapsule powder is formed in which the powder particles have a mean particle size in the range of 100-400 ⁇ and 80 wt .-% of the particles have a size ä 90 ⁇ .
  • the person skilled in the art will choose the diameter of the nozzle and the precursor pressure of the material stream. The higher the form, the smaller the droplets are produced.
  • the microcapsule dispersion is fed in the range of 2-200 bar.
  • a single-fluid nozzle with swirl generator is used. By selecting the swirl generator, droplet size and spray angle can be additionally influenced.
  • the deposition of the particulate microcapsule composition is usually carried out using cyclones or filter separators.
  • the sprayed aqueous microcapsule dispersion and the drying gas stream are preferably conducted in parallel.
  • the drying gas stream is blown in cocurrent with the microcapsule dispersion from above into the tower.
  • dryers Anhydro, Miro or Nivosa can be used, the tower heights of 12-30 meters and widths of 3 to 8 meters have.
  • the throughput of drying gas is typically in the range of 20-30 t h for such spray towers.
  • the throughput of microcapsule dispersion is then usually at 1 to 1, 5 t / h.
  • an emulsion polymer is used which
  • the total amount of emulsion polymer (calculated as solids), which is added to the aqueous microcapsule dispersion before or during, but especially before spray drying, is 1 to 40 parts by weight, often 1 to 25 parts by weight and often 5 to 25 wt. Parts, in each case based on 100 parts by weight of the spray-dried microcapsules contained in aqueous dispersion.
  • Emulsion polymers are familiar to the person skilled in the art and are prepared, for example, in the form of an aqueous polymer dispersion by free-radically initiated aqueous emulsion polymerization of ethylenically unsaturated monomers. This method has been described many times and is therefore well known to the person skilled in the art.
  • aqueous polymer dispersions are commercially available, e.g. under the trademarks ACRONAL®, STYRONAL®, BUTOFAN®, STYROFAN® and KOLLICOAT® from BASF-SE, Ludwigshafen, Germany, VINNOFIL® and VINNAPAS® from Wacker Chemie-GmbH, Burghausen, and RHODIMAX® from Rhodia S.A.
  • the free-radically initiated aqueous emulsion polymerization is usually carried out by dispersing the ethylenically unsaturated monomers, generally with the concomitant use of dispersing aids, such as emulsifiers and / or protective colloids, in aqueous medium and polymerizing them by means of at least one water-soluble free-radical polymerization initiator.
  • dispersing aids such as emulsifiers and / or protective colloids
  • the residual contents of unreacted ethylenically unsaturated monomers are likewise reduced by chemical and / or physical methods likewise known to the person skilled in the art, the polymer solids content is adjusted to a desired value by dilution or concentration, or further conventional additives, such as, for example, bactericidal, are present in the aqueous polymer dispersion foaming or viscosity modifying additives added.
  • emulsion polymers which are present in aqueous dispersion and contain from 50 to 99.9% by weight of vinyl acetate and / or ethylene in copolymerized form.
  • Particularly advantageous are present in aqueous dispersion emulsion polymers, which
  • Vinyl esters of long-chain fatty acids and / or ethylene in polymerized form Very particular preference is given to those emulsion polymers present in aqueous dispersion which
  • Acrylic acid, methacrylic acid, itaconic acid and their amides, such as acrylamide and methacrylamide, may be mentioned by way of example as ⁇ , ⁇ -monoethylenically unsaturated mono- and / or dicarboxylic acid having from 3 to 6 carbon atoms.
  • esters of acrylic and / or methacrylic acid with alkanols having 1 to 12 carbon atoms in particular methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl - And tert-butyl acrylate and the corresponding methacrylates.
  • Ci-Ci2-alkyl esters of acrylic acid are ethyl acrylate, n-butyl acrylate, tert-butyl acrylate, n-hexyl acrylate and 2-ethylhexyl acrylate.
  • the preferred aqueous vinyl acetate-ethylene dispersions have an ethylene content of from 5 to 40% by weight, based on the polymer. If other monomers are used in addition to vinyl acetate and ethylene, the polymer advantageously has a vinyl acetate content of more than 45% by weight.
  • Other monomers which may be used are ole fi nically unsaturated monomers, such as vinyl ethers of straight-chain or branched carboxylic acids having 3-18 C atoms, acrylic, methacrylic, maleic or fumaric acid esters of aliphatic alcohols having 1-18 C atoms, vinyl chloride, furthermore Isobutylene or higher ⁇ -olefins having 4 to 12 C atoms.
  • vinyl acetate and ethylene In addition to the combination of vinyl acetate and ethylene are suitable monomer combinations z. Vinyl acetate / vinyl pivalate / ethylene, vinyl acetate / 2-ethylhexanoic acid vinyl ester / ethylene, vinyl acetate / methyl methacrylate / ethylene and vinyl acetate / vinyl chloride / ethylene, from the group of so-called terpolymers.
  • Advantageous are monomer combinations with a minimum film-forming temperature of the corresponding dispersions of> 16 ° C.
  • stabilizing monomers such as the sodium salt of vinylsulfonic acid, carboxyl group-containing monomers such as acrylic, methacrylic, crotonic or itaconic acid or monoesters of maleic acid whose alcohol component have 1 to 18 carbon atoms, in polymerized Form be contained in a concentration to 5 wt .-% based on emulsion polymer.
  • glass transition temperature is meant the glass transition temperature limit to which it tends to increase in molecular weight according to G. Kanig (Kolloid-Zeitschrift & Zeitschrift fur Polymere, vol. 190, page 1, equation 1).
  • the glass transition temperature is determined by the DSC method (differential scanning calorimetry, 20 K / min, midpoint measurement, DIN 53 765).
  • Tg x1 / Tg1 + x2 / Tg2 + .... xn / Tgn, where x1, x2,... xn are the mass fractions of the monomers 1, 2,..., and Tg1, Tg2,... Tgn are the glass transition temperatures of only one of the monomers 1, 2, .... n constructed polymers in degrees Kelvin mean.
  • the Tg values for the homopolymers of most monomers are known and are listed, for example, in Ullmann's Encyclopedia of Industrial Chemistry, 5th ed., Vol. A21, page 169, Verlag Chemie, Weinheim, 1992; Other sources of glass transition temperatures of homopolymers include, for example, J.
  • the emulsion polymers used according to the invention preferably have a melting point in the range from 105 to 200 ° C. as solids.
  • the average diameter of the emulsion polymers (polymer particles) present in aqueous dispersion is generally in the range from 10 to 500 nm, often 50 to 300 nm or 80 to 200 nm.
  • the solids contents of the aqueous dispersions of emulsion polymers which can be used according to the invention are generally ä 10 and ⁇ 70 wt .-%, preferably> 30 and ⁇ 70 wt .-% and particularly advantageously> 40 and ⁇ 60 wt .-%.
  • Aqueous emulsion polymer dispersions and vinyl acetate-ethylene dispersion are generally known and are described by way of example in DE 2214410, the disclosure of which is expressly incorporated by reference.
  • the aqueous emulsion polymer dispersion can be used directly as a spray aid in the form of the aqueous dispersion resulting from the synthesis.
  • they are used as 45 to 65 wt .-% dispersions.
  • the particulate microcapsule compositions obtained by spray-drying are particles which usually consist of two to several thousand individual capsules which are bound together by the emulsion polymer.
  • the particulate microcapsule compositions obtained according to the invention preferably have an average particle size in the range from D [4,3] of 50 to 200 ⁇ m, preferably of 50 to 150 ⁇ m.
  • the present invention relates to particulate microcapsule compositions comprising the above-mentioned microcapsules and an emulsion polymer, wherein the emulsion polymer has a glass transition temperature of> 16 ° C, and the particulate microcapsule composition has an average particle size D [4,3] of 50 to 200 ⁇ and the microcapsules an average particle size D [4,3] has 1 to 10 ⁇ .
  • the proportion of microcapsules is 80 to 95 wt .-% based on the particulate microcapsule composition.
  • Such particulate microcapsule compositions can be prepared, for example, by spray drying.
  • the particulate microcapsule compositions according to the invention can be advantageously incorporated into thermoplastics.
  • the particulate microcapsule compositions of the invention are particularly preferably incorporated in thermoplastics in an extruder or in an injection molding machine for the production of thermoplastic moldings. If the melt-processable molding material is not to be obtained as granules, but is to be used further directly, also the further processing in the hot state or the direct extrusion of plates, films, pipes and profiles or the direct production of plastic components is advantageous.
  • the particulate microcapsule compositions can be processed advantageously. It is a good, even distribution of the individual microcapsules in the thermoplastic polymer to observe, since the emulsion of the composition in the thermoplastic evenly distributed and the microcapsules are significantly better than single capsules, as in microcapsule compositions of the prior art.
  • the properties of the thermoplastic can be modified.
  • the lipophilic substance is latent heat storage materials
  • heat-storing properties which react to its ambient temperature can be given to the article produced therewith.
  • latent heat storage materials are substances which have a phase transition in the temperature range in which heat transfer is to take place.
  • the latent heat storage materials are - depending on the temperature range in which the heat storage is desired - selected.
  • Preferred latent heat storage materials are aliphatic hydrocarbons, particularly preferably those listed above by way of example.
  • aliphatic hydrocarbons having 14 to 20 carbon atoms and mixtures thereof are preferred.
  • thermoplastic materials in which the particulate microcapsule compositions can be incorporated are:
  • Polyolefins such as polyethylene (PE) and polypropylene (PP),
  • Styrene polymers such as polystyrene (impact-resistant or not impact-modified),
  • Impact-modified vinyl aromatic copolymers such as ABS (acrylonitrile-butadiene-styrene), ASA (acrylonitrile-styrene-acrylate) and MABS (transparent ABS containing methacrylate units),
  • SBS Styrene-butadiene block copolymers
  • S-TPE thermoplastic elastomers
  • Polyesters such as polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETG) and polybutylene terephthalate (PBT),
  • thermoplastic polyurethanes TPU
  • thermoplastics are polyolefins or polyolefin copolymers.
  • microcapsule compositions of the invention are suitable as an additive in polymeric moldings or polymeric coating compositions. These are to be understood as thermoplastics, in the processing of which the microcapsules are not destroyed. Furthermore, the microcapsule compositions are also suitable for incorporation in plastic foams. Examples of foams are polyurethane foam, polystyrene foam, latex foam and melamine resin foam. The particle size of the microcapsule dispersion is measured using a Malvern Mastersizer
  • aqueous microcapsule dispersion obtained according to A) were first successively 24.3 g of a copolymer of vinyl chloride, ethylene, vinyl ester and acrylate (Wacker Polymers) then 3.7 g of a 25 wt .-% aqueous sodium hydroxide solution and finally 10.6 g of a 30 wt .-% aqueous Sokalan AT 120 solution dosed.
  • the dispersion thus obtained was used to obtain a powder with a laboratory spray dryer (cylinder diameter 250 mm, cylinder length 500 mm). For this purpose, the dispersion was atomized with a two-fluid nozzle (nozzle 1, 4 mm, nozzle pressure 3 bar).
  • the drying gas nitrogen was passed in cocurrent with the sprayed Mikrokapseldis- persion from above into the spray cylinder.
  • the drying gas had an inlet temperature of 150 ° C and an outlet temperature of 80 ° C.
  • a particulate microcapsule composition (cyclone discharge) with a particle size D [4.3] 5.7 ⁇ m was obtained.

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Abstract

L'invention concerne des compositions de microcapsules en forme de particules, comprenant des microcapsules et un produit de polymérisation en émulsion, réalisable par séchage par pulvérisation d'une dispersion aqueuse de microcapsules, les microcapsules comprenant un noyau de capsule et un polymère comme paroi de la capsule, et le polymère étant constitué de 30 à 90 % en poids d'un ou de plusieurs monomères (monomères I) du groupe comprenant les esters alkyliques en C1 à C24 de l'acide acrylique et/ou méthacrylique, l'acide acrylique, l'acide méthacrylique et l'acide maléique, 10 à 70 % en poids d'un ou de plusieurs monomères insaturés éthyléniques qui contiennent deux, trois, quatre ou plusieurs radicaux insaturés éthyléniques (monomères II) et 0 à 40 % en poids d'un ou de plusieurs autres monomères (monomères III), rapporté chaque fois au poids total des monomères, moyennant l'utilisation d'une dispersion aqueuse d'un ou de plusieurs produits de polymérisation en émulsion, lesquels contiennent, incorporés par polymérisation, 50 à 99,9 % en poids d'esters de l'acide acrylique et/ou méthacrylique avec des alcanols comptant 1 à 12 atomes de carbone et/ou le styrène, ou 50 à 99,9 % en poids de styrène et/ou de butadiène ou 50 à 99,9 % en poids de chlorure de vinyle et/ou de chlorure de vinylidène, ou 50 à 99,9 % en poids d'acétate de vinyle, de propionate de vinyle, d'ester de vinyle de l'acide Versatic, d'ester de vinyle d'acides gras à longue chaîne et/ou d'éthylène, comme auxiliaire de pulvérisation, un procédé pour leur préparation ainsi que leur utilisation à la fabrication de corps moulés thermoplastiques.
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WO2018072934A1 (fr) 2016-09-29 2018-04-26 Basf Se Matériau d'emballage et son procédé de fabrication
EP3592793A1 (fr) 2017-03-09 2020-01-15 Basf Se Formulations de polyuréthane pour la production d'éléments composites
JP2020509930A (ja) 2017-03-09 2020-04-02 コンストラクション リサーチ アンド テクノロジー ゲーエムベーハーＣｏｎｓｔｒｕｃｔｉｏｎ Ｒｅｓｅａｒｃｈ ＆ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ マイクロカプセル化された重付加触媒
CN107062971B (zh) * 2017-03-27 2019-02-19 上海交通大学 一种高效相变储能封装体
IT201800007179A1 (it) * 2018-07-13 2020-01-13 Dispersione acquosa di copolimeri di alcool etilene-vinilico e film multistrato di barriera all'ossigeno rivestito con detta dispersione
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GB201916519D0 (en) * 2019-11-13 2019-12-25 Vuba Building Products Ltd System for stabilising a layer of stones
CN112876729B (zh) * 2021-01-25 2023-02-17 唐山开滦化工科技有限公司 一种磁性热膨胀微胶囊及其制备方法和应用
WO2024056308A1 (fr) 2022-09-15 2024-03-21 Basf Coatings Gmbh Compositions de matériau de revêtement par électrodéposition comprenant une suspension de pigment et des particules composites contenant un catalyseur contenant du métal
WO2024056309A1 (fr) 2022-09-15 2024-03-21 Basf Coatings Gmbh Compositions de matériaux de revêtement par électrodéposition comprenant des particules composites contenant un catalyseur contenant du métal
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WO2014127951A1 (fr) 2014-08-28

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