WO2019086993A1 - Matériau thermoplastique - Google Patents

Matériau thermoplastique Download PDF

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Publication number
WO2019086993A1
WO2019086993A1 PCT/IB2018/058084 IB2018058084W WO2019086993A1 WO 2019086993 A1 WO2019086993 A1 WO 2019086993A1 IB 2018058084 W IB2018058084 W IB 2018058084W WO 2019086993 A1 WO2019086993 A1 WO 2019086993A1
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WO
WIPO (PCT)
Prior art keywords
weight
thermoplastic
rubber
ethylene
amount
Prior art date
Application number
PCT/IB2018/058084
Other languages
English (en)
Inventor
Umberto Chianese
Original Assignee
Umberto Chianese
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 Umberto Chianese filed Critical Umberto Chianese
Priority to US16/759,891 priority Critical patent/US20200283608A1/en
Priority to CN201880084441.0A priority patent/CN111542421A/zh
Priority to EP18793711.5A priority patent/EP3703922A1/fr
Publication of WO2019086993A1 publication Critical patent/WO2019086993A1/fr

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Classifications

    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B17/0404—Disintegrating plastics, e.g. by milling to powder
    • 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
    • B29K2023/16—EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • 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
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a thermoplastic material and a process for obtaining it.
  • the invention relates to a thermoplastic material based on a mixture of thermoplastic and non-thermoplastic polymers, preferably from recycled materials.
  • thermoplastic material based on a mixture of thermoplastic and non-thermoplastic polymers, preferably from recycled materials.
  • One example for all, for the enormous produced amount produced, is that of end-of-life tyres (ELT) .
  • thermosetting-polymer-based materials i.e. with polymers which have undergone a vulcanization or cross- linking process.
  • Typical examples of such materials are polyurethanes and natural or synthetic rubbers, the first having been subject to a cross-linking reaction of polyols with polyisocyanates and the second to so-called vulcanization .
  • Polyurethanes are used for a wide range of applications. In foamed form, their main uses are in the refrigeration industry, in the building (heat insulation and soundproofing) and the shipbuilding sectors, while in the compact elastic form they constitute the main material for manufacturing seals, soft components for various purposes (telephony, toys, etc.), textile fibres and soles for shoes.
  • Natural or synthetic rubbers are normally used in the making of tyres, shoe soles, seals etc.
  • thermosetting polymers The main problem related to the use of both of these materials is precisely their property of being thermosetting polymers. During the manufacturing step, this need is solved by performing the cross-linking process/vulcanization process inside the mould for forming the manufactured item, but instead when the manufactured item has reached the end of its life the main problem is its recycling. Cross-linked polyurethanes and tyres cannot be formed again in new manufactured items because they are not thermoplastic materials .
  • Rubber de-vulcanization or polyurethane glycolysis methods exist, which make it possible to re-obtain the initial materials, but such processes are not economically advantageous.
  • thermoplastic elastomers TPE
  • TPE thermoplastic elastomers
  • thermoplastic material obtained according to a method which envisages the mixing of non-thermoplastic material, preferably waste material, such as natural and synthetic rubbers and optionally polyurethanes and a relatively small amount of a thermoplastic polymer.
  • the polyurethanes and rubbers may also be virgin, but the economic advantage of the product of the invention and of the process for preparing it derives from the use of polyurethane and waste rubber. It has been seen that the introduction, in a polyurethane/rubber compound, of a variable amount from 10% to 40% by weight of a thermoplastic material confers to the material deriving from it the property of thermoplasticity which allows a constant reuse of it in thermoforming processes.
  • thermoplastic material as defined in claim 1 and in its preferred embodiments, in the claims from 2 to 16 and 18, the text of which is an integral part of the present description.
  • thermoplastic material in which the waste rubber powder is visually indistinguishable and has improved mechanical properties (abrasion resistance, grip, etc . ) .
  • the present invention relates to a thermoplastic material obtained according to a process which involves mixing a non-thermoplastic phase, comprising a mixture of natural and synthetic rubbers and optionally cross- linked polyurethanes , with a relatively small amount of a thermoplastic polymer.
  • thermoplastic material of the invention comprises a non-thermoplastic phase, comprising a mixture of natural and synthetic rubber and optionally a cross-linked polyurethane, and a thermoplastic phase comprising a thermoplastic polymer.
  • thermoplastic material of the invention preferably comprises 10% to 40% by weight of a thermoplastic polymer, 0% to 30% by weight of a cross- linked polyurethane and 10% to 85% by weight of a mixture of natural and synthetic rubber, with the provision that the non-thermoplastic phase is in an amount of between 40% and 85% by weight.
  • thermoplastic material of the invention may also contain cross-linked polymers or copolymers of various nature, deriving from waste materials or recycling, in the non-thermoplastic phase.
  • the thermoplastic material of the invention comprises an amount from 20% to 35% by weight of thermoplastic polymer, from 0% to 20% by weight of the cross-linked polyurethane and from 30% to 60% by weight of a mixture of natural and synthetic rubber.
  • the mixture of natural and synthetic rubber comprises a vulcanized rubber, in particular a rubber powder from end-of-life tyres (ELT) and/or of other manufactured items.
  • the cross-linked polyurethane may be a polyurethane from polyether diol, a polyurethane from polyester diol or mixtures thereof and preferably is a waste material, e.g. from shoe manufacturing.
  • the polyurethane when present, is in form of ground material, preferably with a particle size from 1 to 5 mm.
  • the mixture of natural and synthetic rubber comprises a natural or synthetic rubber and EPDM (ethylene-propylene-diene monomer terpolymer) .
  • EPDM ethylene-propylene-diene monomer terpolymer
  • the mixture comprises from 30% to 80% by weight of EPDM and from 70% to 20% by weight of natural or synthetic rubber.
  • the natural or synthetic rubber can be a stirene- butadiene rubber (SBR) , a nitrile rubber (NBR) , an isoprene rubber, a butadiene rubber, a chloroprene rubber (Neoprene ® ) , a nitrile chloroprene rubber (NCR) , an isobutylene-isoprene rubber (IIR), a polynorbornene rubber (PNR) , a transpolyoctenamer rubber, an EPM rubber (ethylene-propylene monomer) , an acrylic rubber (ACM) , EAM rubber ( ethylene-vinyl acetate) , chlorosulfonated ethylene rubber or mixtures thereof.
  • SBR stirene- butadiene rubber
  • NBR nitrile rubber
  • IIR isobutylene-isoprene rubber
  • PNR polynorbornene rubber
  • transpolyoctenamer rubber an EPM
  • the natural or synthetic rubber is waste material .
  • Natural or synthetic rubbers are in form of powder, preferably with particle size from 400 to 600 microns, for use in articles for shoes, or with particle size from 1000 microns up to 3.5 mm in the building sector.
  • the ethylene-propylene- diene terpolymer is formed by about 45-75%, more preferably about 70%, of ethylene, 13-43%, more preferably about 25%, propylene and 2.5-12%, more preferably about 5%, of diene.
  • the diene is preferably ethylidene-norbornene (ENB) .
  • thermoplastic polymer may be of various nature, according to the type of application to which the material will be dedicated. Such polymer confers given specific technical properties to the material of the invention and may be chosen from the following non- exhaustive list, for example:
  • PE polyethylene
  • LDPE low density PE
  • HDPE high density PE
  • PE-HMW high molecular weight PE
  • PE-UHMW ultra high molecular weight PE
  • PEX + PSAC cross- linked PE + polysaccharide/starch compound
  • chlorinated and chlorosulfonated PE PE-ULD (ultralight PE)
  • EVA polyethylenevinylacetate
  • EVAL polyethylenevinylalcohol
  • EEA ethylene-ethyl acrylate copolymers
  • EBA ethylene-butyl acrylate copolymers
  • EMA ethylene-methyl acrylate copolymers
  • EAA ethylene-acrylic acid copolymers
  • EMAA ethylene- methacrylic acid copolymers
  • E/P ethylene-propylene copolymers
  • EIM ethylene ionomer copolymer
  • COC ethylene ionomer copolymer
  • PDCPD polycyclopentadiene
  • vinyl polymers PS (polystyrene) , PMS (poly-alpha-methylstyrene ) , TPU (thermoplastic polyurethanes ) , TPS ( styrene-based thermoplastic polymers), EPS (expanded polystyrene), PVC (polyvinyl chloride) , PVC-P (plasticized polyvinyl chloride) , homo-and copolymers of PVC, PVAL (polyvinylalcohol ) , PVFM (polyvinylformal ) , PVK
  • PAE polyacrylic ester
  • PAN polyacrylonitrile
  • PMA polymethacrylate
  • PBA polybutyl acrylate
  • ANBA acrylonitrile-methylmethacrylate copolymer
  • ANMA acrylonitrile-butadiene-acrylate copolymer
  • PMMA polymethylmethacrylate
  • AMMA acrylonitrile- methylmethacrylate copolymer
  • MABS methyl methacrylate-acrylonitrile-butadiene-styrene copolymer
  • MBS methacrylate-butadiene-styrene copolymer
  • PMMI polymethacryl-methylimide
  • PA polyamides
  • AB AA/BB
  • polyamide elastomers TPE-A polyesteramides
  • PEBA PA-RIM
  • PMPI poly-m- phenylene-isophthalamide
  • PPTA poly-p-phenylene terephthalamide
  • polyarylsulfides and polyarylsulfones PPS (polyphenylene sulfide) , PASU, PSU (polysulfone) , PES (polyethersulphone ) , PPSU (polyphenylenesulfone) ,
  • polyether-etherketone (polyether-etherketone ) , PEEEK (polyether-ether- ethereketone ) , PEKK (polyethereketoneketone ) , PEEKK (polyether-ether-ketoneketone ) , PEEKEK (polyether ether- ketonetherketone ) , PEKEEK (polyether-ketone-ether- etherketone) , PAEK+PI (polyarylketone + polyimide) ;
  • thermoplastic polyimides PAI (polyamidoimide ) , PEI (polyetherimide ) , PISO (polyimide-sulfone) , PMI (polymethacrylimide ) , PMMI (polymethacryl-methylimide ) , PARI (polyarylimide ) , PESI (polyesterimide ) ;
  • CA cellulose acetate
  • CTA cellulose triacetate
  • CP cellulose propionate
  • CAP cellulose acetopropionate
  • CAB cellulose acetate butyrate
  • NC cellulose nitrate
  • EC ethyl cellulose
  • MC methylcellulose
  • CMC carboxymethylcellulose
  • CH hydrated cellulose
  • PSAC polysaccharide starch
  • thermoplastic material of the invention may further comprise a plasticizer, in order to increase the tenacity of the material.
  • the plasticizer may be contained in a percentage by weight variable from 0% to 15% by total weight of the material, preferably from 2% to 12% by weight.
  • a monomeric plasticizer or a polymeric plasticizer can be used.
  • the plasticizer may be selected from organic phosphates, such as tributyl phosphate, tris (2- ethylhexyl) phosphate or trioctyl phosphate, triphenyl phosphate, tricresyl phosphate and cresyl dip enyl phosphate; adipates, sebacates or esters of fatty acids such as butyl adipate of 2-ethylhexyl adipate or octyl adipate dicicloesile, adipate methylcyclohexyl, sebacate, butyl sebacate, 2-ethylhexyl acrylate or sebacate, octyl sebacate of benzyl and stearate of amyl; phthalates such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diamyl
  • the plasticizer is selected from DOA (dioctyl adipate) and DIDP (diisodecyl phthalate) .
  • thermoplastic material of the invention can also contain other additives, preferably selected, according to the use for which the material is intended, from slipping agents, lubricants, stabilizers, antistatic agents, flame retardants, dyes, flexibilizers, fillers, reinforcing agents and foaming agents.
  • additives can be selected from those normally used in the sector and can be either organic or inorganic.
  • the foaming agents may be either endothermic or exothermic and will be selected, together with the moulding technique, according to whether a closed-cell or an open-cell foamed material is desired.
  • Such additives may be contained in an overall percentage by weight variable from 0% to 15% by total weight of the material, preferably from 3% to 13% by weight .
  • the thermoplastic material comprises an amount from 15% to 35% by weight of a thermoplastic polymer selected from a polyolefin, a styrene polymer or copolymer, a TPU or mixtures thereof, from 0% to 20% by weight of crosslinked waste polyurethane and from 30% to 60% by weight of natural and synthetic rubber mixture as described above.
  • a thermoplastic polymer selected from a polyolefin, a styrene polymer or copolymer, a TPU or mixtures thereof, from 0% to 20% by weight of crosslinked waste polyurethane and from 30% to 60% by weight of natural and synthetic rubber mixture as described above.
  • the polyolefin is selected from polypropylene, polyethylene and HDPE
  • the styrene polymer or copolymer is selected from polystyrene and SBS
  • the natural or synthetic waste rubber is an ELT rubber powder and/or other manufactured items.
  • thermoplastic material of the invention may be obtained by means of the process described below, which comprises the following steps:
  • step b) intimately hot mixing the powder of step b) with EPDM to yield a homogeneous compound containing between 30% and 80% by weight of EPDM;
  • step d) mixing the homogeneous compound of step c) and, when present, the ground cross-linked polyurethane with the thermoplastic polymer, up to the formation of a homogeneous mixture;
  • step e) optionally, adding liquid components (e.g. plasticizers ) to the mixture of step d) and further mixing in a turbo-mixer up to the absorption of the liquid;
  • liquid components e.g. plasticizers
  • the intimate mixing of the natural or synthetic rubber powder with EPDM in step c) may be performed in a Banbury mixer.
  • the intimate mixing temperature may reach up to about 100°C.
  • the homogeneous compound obtained in step c) is preferably ground to a fine particle size by means of a cutter before the subsequent mixing with the thermoplastic polymer.
  • the extruded material may be recovered in form of granules (using a cutter downstream of the extruder) , sheet or cake, according to the extruder used as a function of the final use of the material.
  • the mixture may be extruded by single-screw extruders, dosing extruders, cascade or tandem extruders, rapid adiabatic extruders, planetary extruders, screw extruders with melt separation, barrier screw extruders or twin-screw extruders.
  • the extrusion process performed using a single-screw extruder is briefly described: the extrusion mass is fed by a loading hopper to a screw which rotates in a cylinder with heated zones; here the plastic material is melted mainly by friction and partially by thermal conduction, optionally degassed and then homogenized by cutting and compression action.
  • the conveying effect derives from the friction force applied by the surfaces of the screw and the cylinder on the mass to be extruded.
  • the temperatures required for extrusion are the following:
  • the extrusion speed varies according to the properties one desires to attribute to the innovative thermoplastic material and therefore also of the set temperature.
  • the unit of measurement of the speed is typically the ratio of kilos or volumes of extruded mass per hour.
  • thermoplastic material the mixture of which is suited for making soles for shoe
  • a single-screw extruder of length from 5 to 6 metres, the screw being of progressive or of dosing type with diameter of 90 mm.
  • the extrusion mass is inserted into the loading hopper, the temperature under the hopper must be 140°C and the screw revolutions are programmed for an extrusion of 500 kg/h, the temperature in the centre of the screw must be 150°/160°C, near the degassing area it will be 120°/130°C and at the outlet to the cutter the temperature will be 100°/110°C.
  • thermoplastic material the mixture of which is suited for making bricks, interior and exterior flooring, also floating, heat insulating/soundproofing panels to be used in the building sector
  • a twin-screw extruder of length from 5 to 6 metres, the screw being of co-rotating type with diameter of 115 mm.
  • the extrusion mass is inserted into the loading hopper, the temperature under the hopper must be 160°/170°C and the screw revolutions are programmed for an extrusion of 500/600 kg/h, the temperature in the centre of the screw must be 180°/190°C, near the degassing area it will be 160°C and at the outlet to the cutter the temperature will be 150°C.
  • the particle size of the powders or granulates used in the method described above may be determined, for example, by sieving.
  • the thermoplastic material comprises an amount from 15% to 25% by weight of thermoplastic polyurethane (TPU) or SBS, from 10% to 20% by weight of cross-linked waste polyurethane in granules sized 1-5 mm, from 25% to 60% by weight of mixture of waste rubber powder with a grain size from 400 to 600 microns and EPDM, a plasticizer, preferably DIDP, in an amount of 8-10% by weight, dyes in an amount of 1-3% by weight, silica in an amount of 4-6% by weight, and a lubricant in an amount of 2-4% by weight.
  • TPU thermoplastic polyurethane
  • SBS thermoplastic polyurethane
  • a plasticizer preferably DIDP
  • dyes in an amount of 1-3% by weight
  • silica in an amount of 4-6% by weight
  • a lubricant in an amount of 2-4% by weight.
  • This material is particularly suited for making soles of shoe, and therefore a further object of the invention is a sole for shoes made of such material.
  • the thermoplastic material comprises an amount from 15% to 35% by weight of a polyolefin, preferably polypropylene, or of polystyrene, from 5% to 15% by weight of cross-linked waste polyurethane in granules sized 1-5 mm, from 25% to 60% by weight of a mixture of waste rubber powder with grain size from 400 microns to 3.5 mm and EPDM, a plasticizer, preferably dioctyl adipate, in an amount of 3-7% by weight, dyes in an amount of 1-3% by weight, silica in an amount of 4-6% by weight, and a lubricant in an amount of 2-4% by weight.
  • a polyolefin preferably polypropylene, or of polystyrene
  • cross-linked waste polyurethane in granules sized 1-5 mm, from 25% to 60% by weight of a mixture of waste rubber powder with grain size from 400 microns to 3.5 mm and EPDM
  • a plasticizer preferably dioct
  • Such material is particularly suited for use in the building sector, and therefore a further object of the invention is a brick, floor for exteriors and interiors also raised, a heat insulating/soundproofing panel for building made with this material.
  • the thermoplastic material comprises an amount from 20% to 35% by weight of a polyolefin, preferably HDPE, or of PVC (polyvinyl chloride) , from 10% to 20% by weight of cross-linked waste polyurethane in granules sized 1-5 mm, from 25% to 60% by weight of a mixture of waste rubber powder with grain size from 400 to 600 microns and EPDM, a plasticizer, preferably dioctyl adipate, in an amount of 2-4% by weight, dyes in an amount of 1-3% by weight, silica in an amount of 4-6% by weight, and a lubricant in an amount of 2-4% by weight.
  • a polyolefin preferably HDPE, or of PVC (polyvinyl chloride)
  • PVC polyvinyl chloride
  • Expanding materials are added to the mixture in order to confer the lightness and thermal/acoustic insulation properties to the innovative thermoplastic material .
  • Foaming materials for plastics are known, usually used to confer a greater heat insulation ability to said plastic materials because they create a plurality of pores in it.
  • the foaming materials of known type are divided into two categories: exothermic expanding materials and endothermic expanding materials.
  • the first generate heat and develop a gas during the step of expanding usually nitrogen (e.g. azodicarbonamide, also known as carbamoyliminourea, encapsulated isopentane, 5-phenyltetrazole and benzene sulfonyl hydrazide) ; these types of foaming material, when subjected to heating, decompose releasing heat and a gas, such as nitrogen, carbon dioxide and ammonia.
  • nitrogen e.g. azodicarbonamide, also known as carbamoyliminourea, encapsulated isopentane, 5-phenyltetrazole and benzene sulfonyl hydrazide
  • a gas such as nitrogen, carbon dioxide and ammonia.
  • the endothermic foaming materials absorb heat, whereby degrading and generating neutral gases (e.g. carbon dioxide, but the most known ingredients are carbonates and carboxylic acids) .
  • neutral gases e.g. carbon dioxide, but the most known ingredients are carbonates and carboxylic acids.
  • the foaming material if present, is contained in the mixture in amounts ranging from 5% to 10% by weight.
  • thermoplastic material of the invention thus solves the problem initially posed of making thermoformable, for an indefinite number of times in a wide range of applications (shoes, building, automotive parts, packaging, clothing, toys, etc., in all sectors in which the material will be used) and at a low cost, a waste material which would otherwise be recyclable only for limited uses.
  • thermoplastic polymeric materials commonly used in the applications described above e.g. SBS-based polymers used in the shoe sole and building sector
  • rubber powder displays improved mechanical properties.
  • the material of the invention in its compact form of specific weight of about 1 g/cm 3
  • abrasion resistance determined by the method of UNI EN 12770: 2001
  • the material of the invention in its foamed form of specific weight of about 0.60 g/cm 3 (determined with the method of ISO 2781: 2008), has a loss of volume by abrasion (abrasion resistance determined by the method of UNI EN 12770: 2001) comprised between 150 and 190 mm 3 and a tear strength (determined by the method of ISO 20872) between 10 and 15 N/mm.
  • abrasion resistance determined by the method of UNI EN 12770: 2001
  • a tear strength determined by the method of ISO 20872
  • Foaming agent 5% Foaming agent 5%.
  • the foaming agent may be, for example, Expancel 930 du/mb 120.
  • Expancel 930 du/mb 120 closed-cell endothermic foaming agent
  • Expancel 930 du/mb 120 closed-cell endothermic foaming agent
  • Foaming agent 5% Foaming agent 5%.
  • the foaming agent may be, for example, Expancel 930 du/mb 120.
  • Expancel 930 du/mb 120 closed-cell endothermic foaming agent
  • Expancel 930 du/mb 120 closed-cell endothermic foaming agent
  • the variation of the percentage of the foaming agent determines a corresponding variation of the specific weight of the innovative thermoplastic material which is obtained.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un matériau thermoplastique et son procédé d'obtention. En particulier, l'invention concerne un matériau thermoplastique à base d'un mélange de polymères thermoplastiques et non thermoplastiques, de préférence à partir de matériaux recyclés. Un exemple parmi d'autres, pour l'énorme quantité produite, est celui des pneus usés (ELT). En particulier, la présente invention concerne un matériau thermoplastique comprenant une phase non thermoplastique, comprenant un mélange de caoutchouc naturel et de caoutchouc synthétique et éventuellement un polyuréthane réticulé, et une phase thermoplastique comprenant un polymère thermoplastique. Ledit matériau thermoplastique comprend de préférence de 10 % à 40 % en poids d'un polymère thermoplastique, de 0 % à 30 % en poids d'un polyuréthane réticulé et de 10 % à 85 % en poids d'un mélange de caoutchouc naturel et de caoutchouc synthétique, à condition que la phase non thermoplastique soit présente en une quantité comprise entre 40 % et 85 % en poids.
PCT/IB2018/058084 2017-10-30 2018-10-18 Matériau thermoplastique WO2019086993A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/759,891 US20200283608A1 (en) 2017-11-07 2018-10-18 Thermoplastic material
CN201880084441.0A CN111542421A (zh) 2017-10-30 2018-10-18 热塑性材料
EP18793711.5A EP3703922A1 (fr) 2017-10-30 2018-10-18 Matériau thermoplastique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000123195 2017-10-30
IT102017000123195A IT201700123195A1 (it) 2017-10-30 2017-10-30 Materiale termoplastico

Publications (1)

Publication Number Publication Date
WO2019086993A1 true WO2019086993A1 (fr) 2019-05-09

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PCT/IB2018/058084 WO2019086993A1 (fr) 2017-10-30 2018-10-18 Matériau thermoplastique

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EP (1) EP3703922A1 (fr)
CN (1) CN111542421A (fr)
IT (1) IT201700123195A1 (fr)
MA (1) MA50500A (fr)
WO (1) WO2019086993A1 (fr)

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