US20180291229A1 - Halogen-Free Decorative Homogeneous Surface Coverings - Google Patents

Halogen-Free Decorative Homogeneous Surface Coverings Download PDF

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Publication number
US20180291229A1
US20180291229A1 US15/573,968 US201615573968A US2018291229A1 US 20180291229 A1 US20180291229 A1 US 20180291229A1 US 201615573968 A US201615573968 A US 201615573968A US 2018291229 A1 US2018291229 A1 US 2018291229A1
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United States
Prior art keywords
weight
halogen
styrene
thermoplastic elastomer
wall
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Abandoned
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US15/573,968
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English (en)
Inventor
Helena Johansson
Roland Karlsson
Stefan Karlsson
Nils Wallnäs
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Tarkett GDL SA
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Tarkett GDL SA
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Assigned to TARKETT GDL reassignment TARKETT GDL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOHANSSON, HELENA, KARLSSON, ROLAND, KARLSSON, STEFAN, WALLNÄS, Nils
Publication of US20180291229A1 publication Critical patent/US20180291229A1/en
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Classifications

    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D153/00—Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
    • C09D153/02—Vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/29—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for multicolour effects
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/18—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of organic plastics with or without reinforcements or filling materials or with an outer layer of organic plastics with or without reinforcements or filling materials; plastic tiles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
    • E04F15/105—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of organic plastics with or without reinforcements or filling materials
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/003—Thermoplastic elastomers
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes 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
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0032—Pigments, colouring agents or opacifiyng agents
    • 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
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0044—Stabilisers, e.g. against oxydation, light or heat
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B29K2995/0021—Multi-coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2471/00—Floor coverings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/04—Thermoplastic elastomer

Definitions

  • the present invention is related to a homogeneous (HO) halogen-free decorative floor, wall or ceiling coverings.
  • the invention is further related to a method for the production of floor, wall or ceiling coverings.
  • Materials for floor, wall and ceiling coverings should possess a wide variety of properties. Particularly important for materials used for floor coverings are good wear, abrasion, scratch and indentation resistance and good indentation recovery to reduce visible scratches and indentations of furniture and rolling objects, such as office chairs.
  • PVC-based materials have many desirable properties, such as good filler acceptance, flexibility and scratch resistance.
  • PVC-based materials have many desirable properties, such as good filler acceptance, flexibility and scratch resistance.
  • attention has been focused on the disadvantages of PVC-based flooring.
  • Typical homogeneous PVC surface floor coverings include S-PVC, plasticizer, stabilizer, inorganic filler and pigments.
  • the floor coverings could be produced in extruders in combination with roller mill or belt press.
  • metal stabilizers e.g. calcium and zinc
  • the hydrogen chloride and metal ash from decomposition of the metal stabilizers are undesired consequences from the incineration of scrap associated with manufacturing and installation of PVC-based covering materials.
  • PVC-free floor and wall coverings for example are disclosed in EP 0257796 (B1), EP 0742098 (B1), EP 0850272 (B1), EP1611201 (B1), U.S. Pat. No. 4,379,190, U.S. Pat. No. 4,403,007, U.S. Pat. No. 4,438,228, U.S. Pat. No. 5,409,986, U.S. Pat. No. 6,214,924, U.S. Pat. No.
  • Standard rubber floor coverings are well known in public. The major advantages of such floor coverings are their dimensional stability, the absence of creeping and their relatively high resistance to abrasion.
  • Vulcanisable standard rubber floor covering compositions generally comprise less than 30% by weight of rubber internally mixed with about 60% by weight of fillers and less than about 10% by weight of vulcanisation agents and processing aids. Rubber floor coverings are known to be less tear and stain resistant than PVC floorings. Additionally, conventional PVC equipment cannot manage these compositions.
  • WO 2006/005752 discloses a large variety of possible compositions combining a series of elastomers, thermoplastics and a high styrene resin cured with conventional curing systems like N-tert-butyl-2-benzothiazolesulphenamide (TBBS), zinc dibenzyl dithiocarbamate (ZBEC), N-cyclohexylbenzothiazole-2-sulfenamide (CBS), sulphur, stearic acid and zinc oxide.
  • TBBS N-tert-butyl-2-benzothiazolesulphenamide
  • ZBEC zinc dibenzyl dithiocarbamate
  • CBS N-cyclohexylbenzothiazole-2-sulfenamide
  • sulphur stearic acid and zinc oxide.
  • the composition disclosed in the examples cannot be extruded on conventional PVC extruders.
  • the obtained granules have a strong tendency to agglomerate in the transport containers.
  • EP 1 361 249 B1 discloses a substantially halogen-free thermoplastic elastomer composition for decorative surface coverings comprising a dynamically vulcanised blend of epoxydized rubbers such as natural rubber, ethylene-propylene-di ⁇ ne-rubber (EPDM), acrylonitrile-butadi ⁇ ne-rubber (NBR) and styrene-butadi ⁇ ne-rubber (SBR), ionomers and diluent polymers such as ethylene vinyl acetate (EVA).
  • EPDM ethylene-propylene-di ⁇ ne-rubber
  • NBR acrylonitrile-butadi ⁇ ne-rubber
  • SBR styrene-butadi ⁇ ne-rubber
  • EVA ethylene vinyl acetate
  • US 2002/0168500 A1 discloses an electrically conductive floor covering comprising at least two layers bonded to one another, including a bottom layer of electrically conductive rubber arranged under a light-coloured top layer of rubber, wherein the top layer is produced from a powder of first particles that are light in colour and made of electrically insulating rubber, and second particles embedded therein, which are made of electrically conductive, at least partially vulcanised rubber; the first and the second particles are pressed together and to the bottom layer and bonded by vulcanisation.
  • First and second particles both use a combination of a high styrene resin (HSR) and styrene-butadiene-rubber (SBR)
  • WO 2008/083973 discloses a decorative surface covering obtainable by a vulcanisable composition, said composition comprising a first polymer component consisting of styrene butadiene styrene block copolymer (SBS); a second polymer component selected from the group consisting of a random or partially random copolymer of butadiene and styrene (SBR) and acrylonitrile butadiene rubber (NBR); a third polymer component consisting of a high styrene content styrene butadiene copolymer (HSR), a filler, a vulcanisation system and additives selected from the group consisting of processing aids, stabilizers, pigments and compatibilizers.
  • SBS styrene butadiene styrene block copolymer
  • SBR random or partially random copolymer of butadiene and styrene
  • NBR acrylonitrile butadiene
  • EP 1 389 519 B1 discloses a process for providing a covering, such as a flooring, the said process comprising the operations of: feeding an extruder with strips of vulcanisable elastomer material of different colour, subjecting said material to extrusion, followed by shredding to form a granular material; subjecting said granular material to mixing until it is rendered substantially homogeneous; feeding said granular material, rendered homogeneous by mixing, to a calender, by direct feeding by gravity into the gap between the rollers of the calender so as to obtain, as a result of calendering, a strip of vulcanisable elastomer material; and subjecting said material in the form of a strip to vulcanisation.
  • Vulcanisation increases the complexity of the production process and renders recycling of the final product more difficult.
  • the present invention discloses a halogen-free decorative surface (floor wall or ceiling) covering composition
  • a polymer blend comprising:
  • thermoplastic elastomer (a) and the thermoplastic polyurethane (b) together constitute 100% of the polymer blend.
  • the halogen-free decorative surface covering composition comprises from 25 and 70% by weight of the polymer blend, the polymer blend comprising from 60 to 20% by weight, preferably from 50 to 30% by weight of thermoplastic elastomer (a) and from 40 to 80% by weight, preferably from 50 to 70% by weight of thermoplastic polyurethane (b), the sum of (a) and (b) being 100%, the composition comprising between 30 and 75% by weight of one or more ingredients selected from the group consisting of lubricants, compatibilizers, silicones, antioxidants, fillers, pigments, dyes and additives, the polymer blend and the one or more ingredients together constituting 100% of the composition.
  • the present invention further discloses a process for the preparation of a halogen-free decorative surface covering, comprising the steps of:
  • Decorative surface coverings include any design covering such as floor-, wall- and ceiling coverings.
  • the decorative surface coverings of the present invention are substantially halogen free what the expression “halogen free” has to be understood as devoid of any halogen comprising polymers, without excluding the presence of halogen comprising impurities or halogen comprising additives present in a concentration of less than 1 percentage.
  • the decorative surface coverings of the present invention comprise a blend of one or more thermoplastic elastomer and one or more thermoplastic polyurethanes.
  • thermoplastic elastomers are block copolymers comprising hard and soft blocks, wherein the hard blocks are obtained from the polymerisation of one or more vinyl aromatic monomer(s) and wherein the soft blocks are obtained from polymerisation of one or more alkylene(s) or the copolymerisation of one or more alkylene(s) and one or more vinyl aromatic monomer(s).
  • the vinyl aromatic monomer is selected from the group consisting of styrene and ⁇ -methyl styrene wherein the benzene ring may be substituted by one to three (C1-C4) alkyls, preferably methyl or ethyl groups or vinylnaphthalene optionally substituted by one or more methyl or ethyl groups.
  • the vinyl aromatic monomer preferably is selected from the group consisting of styrene, ⁇ -methyl styrene and vinyl toluene.
  • the vinyl aromatic monomer more preferably is styrene.
  • the alkylene preferably is selected from the group consisting of ethylene, propylene, butylene, pentene, hexane, octane, butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, pyperylene, 2,4-hexadiene, 3-butyl-1,3-octadiene and phenyl-1,3-butadiene.
  • the alkylene more preferably is butadiene or isoprene.
  • thermoplastic elastomers of the present invention can be in the form of a linear diblock, triblock and multiblock copolymer or in the form of radial block copolymers.
  • a mixture of linear and radial block copolymers can also be used according to the present invention.
  • the soft blocks of the thermoplastic elastomer preferably contains a total alkylene monomer which is more than 50% mole, preferably at least 70% mole, the remaining portion, if any, consisting of other copolymerizable monomers such as vinylaromatic monomers.
  • thermoplastic elastomer of the present invention preferably comprises between 10 and 70% by weight, more preferably between 10 and 60% by weight, most preferably between 20 and 50% by weight of hard blocks.
  • thermoplastic elastomer of the present invention preferably comprises of from 30 to 90% by weight, preferably of from 40 to 80% by weight, more preferably of from 50 to 70% by weight of at least one vinyl aromatic monomer.
  • the hard blocks are characterized by a glass transition temperature which is higher than the service temperature; the soft blocks are characterized by a glass transition temperature which is lower than the service temperature and which is preferably comprised between 20 and ⁇ 110° C., preferably between ⁇ 10 and ⁇ 100° C., more preferably between ⁇ 20 and ⁇ 90° C.
  • the soft blocks of the thermoplastic elastomer may be partially or fully hydrogenated.
  • the weight average molecular weight of the thermoplastic elastomer preferably ranges from 100.000 to 500.000 g/mole, more preferably from 150.000 to 400.000 g/mole.
  • thermoplastic elastomer of the present invention preferably is selected from the group consisting of styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-isobutylene-styrene, styrene-ethylene-butylene-styrene and styrene-ethylene-propylene-styrene.
  • thermoplastic elastomer preferably is a styrene-butadiene-styrene block copolymer.
  • thermoplastic elastomers suitable for being used in the blend of the present invention include Europrene (Polimeri Europe), Kraton (Kraton Performance Polymers Inc.), Stereon (Firestone Polymers), Styroflex (Styrolution), Finaprene (Total Petrochemicals), Tufprene (Asahi Kasei Corp) and Laprene and Soprene (So.F.Ter group).
  • thermoplastic polyurethane are obtained from reaction of a diisocyanate compound with at least one difunctional compound capable of reacting with an isocyanate group, preferably at least one difunctional hydroxyl group comprising compound and optionally a chain extender.
  • the diisocyanate compound may be aromatic or aliphatic.
  • Aromatic diisocyanates include, for example, 4,4′-, 2,2′- and 2,4′-methylene diphenyl diisocyanate and toluene diisocyanate; aliphatic diisocyanates include, for example, 1,6-hexamethylene diisocyanate, isophorone diisocyanate and 2,2′-, 4,4′- and 2,4′-dicyclohexylmethane diisocyanate. Mixtures of aromatic and aliphatic diisocyanates may be used.
  • isocyanate compositions comprising aromatic diisocyanates and more preferably methylene diphenyl diisocyanate.
  • the difunctional compound capable of reacting with an isocyanate group preferably is a difunctional hydroxyl group comprising compound and may be selected from derivatives of polyesteramides, polythioethers, polycarbonates, polyacetals, polyolefins, polysiloxanes, polyesters, polyethers, polycaprolactone and mixtures thereof. Polyesters, polyethers, polycaprolactone are preferred.
  • Suitable chain extenders include aliphatic diols such as 1,4-butanediol or 1,6-hexanediol or aminoalcohols such as N-methyldiethanolamine.
  • the weight average molecular weight of the thermoplastic polyurethane preferably ranges from 50.000 to 400.000 g/mole, more preferably from 75.000 to 200.000 g/mole.
  • thermoplastic polyurethanes suitable for being used in the blend of the present invention include Epamould (Epaflex Polyurethanes), Laripur (Coim S.p.A.), Apilon (Api Plastic S.p.A.), Estane and Pearlcoat/Pearlthane (Lubrizol), Avalon (Huntsman Polyurethanes), Elastollan (BASF) and Pellethane (Dow Chemical Co).
  • the decorative surface coverings of the present invention are obtained from processing a composition comprising from 30 and 60% by weight, preferably from 35 to 55% by weight, more preferably from 40 to 50% by weight of the polymer blend comprising the above specified thermoplastic elastomer and thermoplastic polyurethane said polymer blend comprising between 40 and 80% by weight of thermoplastic polyurethane and between 60 and 20% by weight of thermoplastic elastomer.
  • the polymer blend comprises between 50 and 70% by weight of thermoplastic polyurethane and between 50 and 30% by weight of thermoplastic elastomer.
  • compositions according to the present invention further comprise ingredients such as lubricants, compatibilizers, silicones, antioxidants, fillers and pigments or dyes.
  • Suitable lubricants are of the stearic acid type, the fatty acid ester type, the fatty acid amide type, the paraffin hydrocarbon type, the naphtenic hydrocarbon type, the metal soap type, the silicone type, polyethylene glycol type and waxes, used alone or as a mixture.
  • Preferred lubricants include stearic acid and zinc stearate.
  • suitable compatibilizers include ethylene/alkyl acrylate copolymers, ethylene/alkyl acrylate/carbon monoxide copolymers, ethylene/alkyl acrylate/carbon monoxide copolymers grafted with carboxylic acid anhydride groups, ethylene/alkyl acrylate/mono methyl maleate copolymers, ethylene/alkyl acrylate copolymers grafted with carboxylic acid anhydride groups, ethylene/vinyl acetate copolymers, ethylene/vinyl acetate copolymers grafted with carboxylic acid anhydride groups, ethylene/vinyl acetate/carbon monoxide copolymers; ethylene/vinyl acetate/carbon monoxide copolymers grafted with carboxylic acid anhydride groups and block copolymers comprising one or more alkylene(s) and one or more vinyl aromatic monomer(s) and grafted with carboxylic acid anhydride groups.
  • silicones are polysiloxanes including polymers and copolymers comprising dimethylsiloxane units, methylhydrogensiloxane units, diphenylsiloxane units, phenylmethylsiloxane units, dimethylhydrogensiloxane units and trimethylsiloxane units.
  • a preferred silicone is polydimethylsiloxane.
  • antioxidants examples include phenolic and thioester antioxidants.
  • the antioxidants may be used alone or in combination.
  • Preferred antioxidants are pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) (Irganox 1010) and octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (Irganox 1076), both available from BASF.
  • fillers suitable for the composition of the present invention can be any conventional filler, especially those types traditionally used in surface coverings.
  • the filler can be organic, inorganic, or a combination of both, such as with different morphologies.
  • Examples include, but are not limited to, coal fly ash, carbonate salts such as magnesium carbonate, calcium carbonate and calcium-magnesium carbonate, barium sulfate, carbon black, metal oxides, inorganic material, natural material, alumina trihydrate, magnesium hydroxide, bauxite, talc, mica, dolomite, barite, kaolin, silica, post-consumer glass, or post-industrial glass, synthetic and natural fiber, or any combination thereof.
  • carbonate salts such as magnesium carbonate, calcium carbonate and calcium-magnesium carbonate, barium sulfate, carbon black, metal oxides, inorganic material, natural material, alumina trihydrate, magnesium hydroxide, bauxite, talc, mica, dolomite, barite, kaolin, silica, post-consumer glass, or post-industrial glass, synthetic and natural
  • the filler comprises talc, mica, calcium carbonate, barite, kaolin, bauxite, dolomite, silica, glass, or any combination thereof.
  • pigments and dyes suitable for the composition of the present invention are metallic oxides such as titanium dioxide, iron oxide, zinc oxide and the like, metal hydroxides, metal powders, sulphides, sulphates, carbonates, silicates, iron blues, organic reds, organic maroons and the like.
  • compositions according to the present invention can optionally contain one or more additives, such as, modifying resins, cross-linking agents, stabilizer, foaming agents, tackifiers, dispersion agents and/or other conventional organic or inorganic additives commonly used in polyolefin or in other surface coverings, such as, but not limited to, UV-stabilizers, antistatic agents, thermal and light stabilizers, flame retardants, or any combination thereof.
  • additives such as, modifying resins, cross-linking agents, stabilizer, foaming agents, tackifiers, dispersion agents and/or other conventional organic or inorganic additives commonly used in polyolefin or in other surface coverings, such as, but not limited to, UV-stabilizers, antistatic agents, thermal and light stabilizers, flame retardants, or any combination thereof.
  • the composition includes at least one pigment, flame retardant, thermal stabilizer, light stabilizer, antistatic agent, or any combination thereof.
  • a decorative surface covering more particularly floor and wall covering is provided.
  • the decorative surface covering of the present invention comprises:
  • a method for producing said decorative surface coverings is provided.
  • the method comprises:
  • the present invention means a composition differing from another composition by the type and the quantity of one or more ingredients (thermoplastic elastomer(s), thermoplastic polyurethane(s), compatibilizer(s), silicone(s), lubricant(s), antioxidant(s), filler(s), pigment(s), dye(s) and additive(s))
  • Mixing generally is performed in a Banbury mixer, continuous mixer, a ribbon mixer or any combination thereof to form a blend.
  • Compounding generally is performed in an extruder at a temperature comprised between 140 and 220° C., preferably between 150 and 200° C., more preferably between 160 and 190° C.
  • the calendering step prior to the granulating step, is performed at a temperature comprised between 110 and 160° C., preferably between 120 and 150° C., more preferably between 130 and 140° C.
  • the speed of the rollers in general is comprised between 2 and 15 m/min, preferably between 4 and 12 m/min, more preferably between 6 and 10 m/min.
  • the granulating extruder step is performed at a temperature comprised between 40 and 150° C., preferably between 80 and 150° C., more preferably between 100 and 140° C.
  • the speed of the screw in general is comprised between 10 and 30 rpm, preferably between 16 and 25 rpm, more preferably between 18 and 25 rpm.
  • the method of the present invention comprises the additional step of providing a topcoat on the multi coloured sheet, wherein the topcoat is a cross-linked layer, preferably obtained by subjecting a radiation curable coating composition to actinic irradiation.
  • the radiation curable coating composition in general comprises ethylenically unsaturated acrylic, ester, ether or urethane comprising polymers, oligomers or monomers and may be organic solvent free or water-borne.
  • the process for contacting radiation curable coating composition with the multi-coloured marble sheet comprises any liquid coating application technique, known in the art, such as curtain coating, roller application or spray coating.
  • the properties of the decorative surface coverings of the present invention are comparable or these of conventional PVC-based decorative surface coverings.
  • the decorative surface coverings of the present invention have properties which are comparable to or superior than the currently existing PVC-free decorative surface coverings.
  • the decorative surface coverings of the present invention can be produced on existing equipment intended for the production of PVC comprising surface coverings.
  • compositions according to the formulation as given in table 1 to 5, were melt-mixed in an extruder at a temperature of about 170° C. delivering a single coloured compound in strand form.
  • Calprene® C540 is a linear styrene/butadiene/styrene block copolymer from Dynasol;
  • Europrene® SOL T6414 is a radial styrene butadiene block copolymer from Polimeri Europa;
  • Finaclear® 602 D is a styrene/butadiene/styrene block copolymer from Total Petrochemicals;
  • Tufprene® A is a styrene/butadiene block copolymers from Asahi Kasei;
  • Pearlcoat®163K is a polyether based thermoplastic polyurethane from Lubrizol;
  • Pearlcoat® 127K is a polyester-based thermoplastic polyurethane from Lubrizol;
  • Elastollan 1185A 10 is an aromatic thermoplastic polyether polyurethane from BASF;
  • Fusabond® N525 is an anhydride modified ethylene copolymer from
  • Each thus obtained sheet was then granulated to obtain multi coloured marbled granules of suitable sizes (e.g. 0.1 to 40 mm).
  • the granules were scattered on the steel belt in a double belt press, wherein the double belt press operates at a temperature of 185° C., a pressure of 18 bar and a belt speed of 12 m/min., and pressed to a multi coloured, sheet.
  • the apparatus with the scratching tool is placed over the sample so that a wagon can be pulled across the surface.
  • the applied force starts with 0.5N and increase 0.5N each time until a scratch appears.
  • Friction is measured with a modified Tortus friction tester. Instead of using the measuring foot, a sled is fastened to the machine by a line. The force required to drag the sled over the surface of the sample with the motor of the machine is recorded as the friction value.
  • a flooring sample is placed inside a drum with the wear surface exposed.
  • a rubber-coated tetrahedron (or tetrapod) weight and a soiling compound are added and are tumbled as the drum rotates 1000 revolutions.
  • test material is laid flat and fixed to the sample holders on the moving board of the cleaning device.
  • the cleaning procedure simulates cleaning/washing by machine.
  • the cleaning is carried out with a detergent dissolved in water.
  • the rotating cleaning pad passes over the surface 6 times.
  • test results are visually evaluated by using a grey scale and ranked according to the degree of soiling and scratching. The results are described on a scale from 0 to 5, wherein 0 stands for severe damage while 5 stands for no visible change.
  • the fire retardance is based on the radiant panel test EN ISO 9239-1, wherein a test specimen is placed horizontally below a gas-fired radiant panel inclined at 30°. The specimen is exposed to a defined field of total heat flux, 11 kW/m2 at the hotter end close to the radiant panel, and decreasing to 1 kW/m2 at the other end farther away from the radiant panel.
  • a pilot flame front from a line burner is applied to the hotter end in order to ignite the specimen.
  • the progress of the flame front along the length of the specimen is recorded in terms of the time it takes to travel to various distances.
  • the smoke development during the test is measured on the basis of light obscuration by smoke in the exhaust duct.
  • the duration of the test is 30 minutes.
  • the classification criterion is the critical heat flux (CHF) defined as the radiant flux at which the flame extinguishes or the radiant flux after a test period of 30 minutes, whichever is lower.
  • CHF critical heat flux
  • BFL stands for a critical flux ⁇ 8.0 kW ⁇ m ⁇ 2
  • CFL stands for a critical flux ⁇ 4.5 kW ⁇ m ⁇ 2
  • DFL stands for a critical flux ⁇ 3.0 kW ⁇ m ⁇ 2
  • s1 stands for a smoke production ⁇ 750%.minutes.
  • Dry buffing is the most efficient method to use to restore the floor's surface once wear has become visible.
  • the pad of the dry buffing consists of non-woven fiber and resinous binder in which abrasive particles may or may not be distributed, frictional heat is produced by frictional rubbing of the pad on floor's surface, thus removing completely or partially most of the wear indicators. It is best to dry-buff right after the floor has been machine cleaned. Dry buffing limits renewed soiling. Best result is obtained by 500 to 1500 rpm and the use of a red pad.
  • Dry buffing was performed using a high speed Clean Star D-430 buffing machine manufactured by Amano. Colour change, gloss, abrasion and blister on the surface layer were examined after one, two or three times of a 20 second dry buffing. The gloss of the floor material of the present invention was markedly increased with the number of polishing times. In addition, the procedure caused no changes in colour, generated no obvious abrasion and formed no blisters, thus showing the markedly excellent dry maintenance performance by a high speed buffing machine.
  • the decorative floor coverings, processed from the compositions of the present invention are characterized by an improved processability compared to rubber flooring: as a result of the absence of the vulcanisation step, a process characterized by more flexibility in process temperatures and melt viscosity is feasible. Because no vulcanisation is performed, the decorative surface coverings of the present invention are about 100% recyclable.

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  • Paints Or Removers (AREA)
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