WO2021025578A1 - Composition à base de polyéthylène - Google Patents

Composition à base de polyéthylène Download PDF

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Publication number
WO2021025578A1
WO2021025578A1 PCT/RU2019/000556 RU2019000556W WO2021025578A1 WO 2021025578 A1 WO2021025578 A1 WO 2021025578A1 RU 2019000556 W RU2019000556 W RU 2019000556W WO 2021025578 A1 WO2021025578 A1 WO 2021025578A1
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Prior art keywords
composition according
composition
polyethylene
preparing
hdpe
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PCT/RU2019/000556
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English (en)
Inventor
Alexey Mikhailovich VOLKOV
Irina Gennadievna RYZHIKOVA
Oksana Anatolievna LITVINENKO
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Public Joint Stock Company "Sibur Holding"
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Priority to CN201980098956.0A priority Critical patent/CN114269827A/zh
Priority to EP19940795.8A priority patent/EP4017914A4/fr
Priority to PCT/RU2019/000556 priority patent/WO2021025578A1/fr
Publication of WO2021025578A1 publication Critical patent/WO2021025578A1/fr

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    • 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
    • C08J3/005—Processes for mixing polymers
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Definitions

  • the present invention relates to composite materials based on mixtures of polyethylene of diverse structures, with improved compatibility of components, in particular, low-density polyethylene (LDPE), linear polyethylene and high-density polyethylene (HDPE).
  • LDPE low-density polyethylene
  • HDPE high-density polyethylene
  • This composition can be used in building and construction, transport, cable, and pipe industries, in production of packaging materials and articles obtained by a foaming, which are characterized by high heat, sound, and waterproof properties, as well as in the form of film material produced by a blowing method or any other known method.
  • polyethylene is one of the most well known polymeric materials; however, it has rather limited fields of application due to the need to improve some of its properties.
  • Polyethylene-based materials are known that are prepared by various methods. LDPE (low-density polyethylene), also called HPPE (high pressure polyethylene), is prepared by a radical mechanism at high pressure and temperature. Homo- and copolymer, HDPE (high-density polyethylene), also called LPPE (low- pressure polyethylene), is prepared by a catalytic method at low pressure and temperature. Copolymers of ethylene with higher a-olefins, linear PE of low density (LLDPE) and medium density (MDPE), are also prepared by a catalytic method. Each type of PE differs in its structural features that determine the complex of properties of these materials and specific qualities forming them.
  • LDPE polyethylene
  • MFR melt flow rate index
  • 30 cN centinewton
  • LDPE analogs later appeared, such as linear-chain ethylene homo- or copolymers produced using Ziegler-Natta catalysts at low pressure; HDPE; and linear polyethylene (PE), exhibit a higher crystallinity of the polymer matrix, which gives them significant advantages in strength characteristics, heat resistance, and surface hardness.
  • low melt strength of linear varieties of PE does not allow them to completely replace LDPE on the market of polymer articles.
  • Foam materials are currently of interest and, if LDPE is used in this method for producing plastic materials, first of all high values of polymer melt strength are required for the preservation of the foam structure of the material exiting the forming device of the extruder.
  • Foamed LDPE has a number of advantages over the well-known and widespread foamed polymeric materials, such as polyurethane foam, polystyrene foam, polyvinyl chloride foam, etc.
  • LDPE is significantly inferior to its analogs in such an important parameter as heat resistance, and cannot be kept for a long time at temperatures above 80°C. This feature significantly reduces potential fields of application and use of both foamed LDPE and other materials based on it.
  • International application W02005068548 discloses a polyethylene mixture comprising from 40 to 70 wt.% bimodal HDPE with a density of from 0.950 to 0.968 g/cm 3 , and from 30 to 60 wt.% LDPE with a density of from 0.915 to 0.930 g/cm 3 .
  • the melt flow rate (MFR190°C/2.16 kg ) of the mixture according to this invention is from 3 to 15 g/10 min.
  • the proposed PE mixture is used for lamination and coating with a thin polymer barrier layer of hard surfaces.
  • the closest analogue of the composition claimed in the present invention is a PE mixture described in WO0248258.
  • the composition according to the claimed invention is intended for the manufacture of extrusion coatings and films.
  • the composition includes:
  • LLDPE linear low density polyethylene
  • C6-C8 a-olefin a copolymer of ethylene and a C6-C8 a-olefin, having a melt flow rate at 190°C of from 0.05 to 1 g/10 min, a density in the range of from 0.90 to 0.93 g/cm 3 , and a polydispersity index of from 1 to 4;
  • HDPE high density polyethylene
  • LDPE low density polyethylene
  • LDPE low density polyethylene
  • a polydispersity index of from 9 to 12 having a melt flow rate at 190°C of from 0.3 to 4 g/10 min and a density of from 0.90 to 0.93 g/cm 3 .
  • Said composition according to embodiments of the invention is prepared by dry mixing of all components with further melt processing.
  • This composition is characterized by the following parameters: tensile strength at break of from 27600 to 34000 kPa, elongation by 839-927%, puncture resistance of from 378 to 510 N/cm 2 .
  • tensile strength at break of from 27600 to 34000 kPa
  • elongation by 839-927% puncture resistance of from 378 to 510 N/cm 2
  • puncture resistance of from 378 to 510 N/cm 2 .
  • Such characteristics ensure the use of the composition for the manufacture of films, including by blowing method.
  • a low melt strength index of 10 cN does not make it possible to expand the use of the composition to the production of articles by foaming.
  • the object of the present invention is to offer a composition based on a mixture of polyethylenes with an increased melt strength, which allows the production of articles using a foaming method, as well as preservation of heat resistance, optical and deformation strength characteristics, hardness, and elasticity.
  • the technical result of the present invention is to obtain a composition based on polyethylene mixtures by increasing the melt strength, allowing the production of articles by foaming.
  • An additional technical result is an improvement of the surface quality (gloss and smoothness) of the material prepared on the basis of this polyethylene composition, and the possibility of preparing this composition with a desired combination of physical properties by an economical one-step method, without the need for a crosslinking step and other post-processing steps.
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • HDPE high density polyethylene
  • the nucleating effect of polypropylene can be observed, inter alia, in an increase the compositional compatibility of polyethylenes, which leads to an increase in the homogeneity and stability of the supramolecular structure of the polymer matrix and, therefore, to an improvement in the surface quality of the extruded material, such as smoothness and gloss.
  • the invention also relates to a method for preparing a polyethylene composition for foaming, comprising mixing and processing components, as defined below, into homogeneous melt, wherein the amount of components are given based on the total weight of the composition:
  • LDPE low-density polyethylene
  • HDPE high-density polyethylene
  • LLDPE linear low-density polyethylene
  • PP polypropylene
  • the invention also relates to the use of the above polyethylene composition as a composition for the production of articles by foaming and to the articles thus produced.
  • composition according to the present invention includes the following components:
  • LDPE low density polyethylene
  • HDPE high-density polyethylene
  • LLDPE linear low-density polyethylene
  • D. from 0.5 to 10 wt.% of polypropylene, and E. from 0 to 2 wt.% of other additives.
  • PE polyethylene
  • HDPE high-density polyethylene
  • HPPE high-pressure polyethylene
  • PP polypropylene
  • T vicat, Vicat heat resistance under a load of 10N;
  • low-density polyethylene LDPE
  • linear low-density polyethylene LLDPE
  • HDPE high-density polyethylene
  • a polyethylene used as LDPE is produced by radical chain-growth polymerization of ethylene at high pressure (up to 2000 atm or more) in tubular or autoclave reactors.
  • the LDPE used in the composition is characterized by an MFR 190° / 2,16 kg of from 0.1 to 0.7 g/10 min, preferably from 0.2 to 0.5 g/10 min, more preferably from 0.2 to 0.4 g/10 min, and by a density of from 0.910 to 0.935 g/cm 3 , preferably from 0.910 to 0.930 g/cm 3 , more preferably from 0.915 to 0.925 g/cm 3 .
  • the content of LDPE in the composition is from 20 to 84 wt.%, preferably from 25 to 80 wt.%, and most preferably from 30 to 76 wt.
  • Trademarks of LDPE that can be used as LDPE in the composition are, for example: LDPE 15303-003 produced by Tomskneftekhim, LLC (Tomsk), LDPE 15303-003 produced by Kazanorgsintez, PJSC(Kazan), LDPE 15313-003 produced by Kazanorgsintez, PJSC (Kazan), LDPE 15303-003 produced by Ufaorgsintez, PJSC (Ufa), etc.
  • a polyethylene used as LLDPE is prepared by anionic- coordination copolymerization of ethylene with higher C 3 -C 10 a-olefins under low pressure on Ziegler-Natta catalysts or by using metallocene catalytic systems, according to standard industrial technologies.
  • the LLDPE used in the composition is characterized by an MFR 190°/2,16 kg of from 0.5 to 2 g/10 min, preferably from 0.7 to 1.5 g/10 min, more preferably from 0.8 to 1.3 g/10 min, and by a density of from 0.895 to 0.935 g/cm 3 , preferably from 0.910 to 0.925 g/cm 3 . It is preferable to use the LLDPE that has a molecular weight of from 50000 to
  • the molecular weight according to the present invention means an average-weight molecular weight, unless otherwise specified.
  • the content of LLDPE in the composition is from 5 to 25 wt.%, preferably from 8 to 20 wt.%.
  • LLDPE Known trademarks of LLDPE or mixtures thereof can be used as LLDPE in the composition, for example, Daelim XP 9200 with an MFR 190°/2,16 kg of 1.0 g/10 min produced by South Korea, Daelim VL 0001 with an MFR 190°/2,16 kg of 1.0 g/10 min produced by South Korea, Daelim XP 9100 with an MFR 190°/2,16 kg of 0.8 g/10 min produced by South Korea, Sabic G 1620B with an MFR 190°/2,16 kg of 1.0 g/10 min produced by Saudi Arabia, LLDPE 1500E with an MFR 190°/2,16 kg of from 1.0 to 1.4 g/10 min produced by Nizhnekamskneftekhim (Nizhnekamsk), BA 204E with an MFR 190°/2,16 kg of 0.8 g/10 min produced by Borealis (Austria), Moplen HP556E with an MFR 190°/2,16 k g
  • Polyethylene used as HDPE is prepared by anionic-coordination homopolymerization of ethylene or copolymerization of ethylene with higher C 3 -C 10 a- olefins under low pressure using Ziegler-Natta catalysts according to standard industrial technologies.
  • the HDPE used in the composition is characterized by an MFR 190°/2,16 kg of from 0.05 to 5 g/10 min, preferably from 0.2 to 5 g/10 min, most preferably from 0.3 to 5 g/10 min and by a density of from 0.935 to 0.970 g/cm 3 , preferably from 0.940 to 0.960 g/cm 3 .
  • the content of HDPE in the composition is from 10 to 70 wt.%, preferably from 12 to 60 wt.%, most preferably from 15 to 50 wt.%.
  • HDPE monomodal homo- and copolymers of ethylene with higher C 3 - C 10 a-olefins having an average molecular weight of from 80000 to 200000 g/mol, preferably from 100000 to 150000 g/mol
  • HDPEs of known trademarks or mixtures thereof can also be used as the HDPE in the composition, for example, HDPE 276-73, 273-83, P-Y342, PE2NT22-12, SABIC HDPE 5429, SABIC HDPE F 04660, HDPE PE30T-49 and other trademarks with similar properties.
  • Propylene homopolymers that can be used are both high-flow homopolymer propylene, such as PPH270 with MFR 230°/2,16 kg of 25-27 g/10 min and/or PPH450 with MFR 230°/2,16 kg of 45g/10 min, and preferably low-flow homopolymer propylene, such as PPH030GP with a melt flow rate of from 2 to 5 g/10 min, preferably from 2.5 to 4 g/10 min, produced by SIBUR LLC or other companies in the Russian Federation or abroad.
  • high-flow homopolymer propylene such as PPH270 with MFR 230°/2,16 kg of 25-27 g/10 min and/or PPH450 with MFR 230°/2,16 kg of 45g/10 min
  • low-flow homopolymer propylene such as PPH030GP with a melt flow rate of from 2 to 5 g/10 min, preferably from 2.5 to 4 g/10 min, produced by SIBUR LLC or other companies in the Russian Federation or abroad.
  • the content of semi-crystalline isotactic polypropylene in the composition varies from 0.5 to 10 wt.%, preferably from 1 to 7 wt.%, most preferably from 1 to 5 wt.%.
  • composition according to the present invention can comprise other additives, such as antioxidants, heat stabilizers, light stabilizers, or mixtures thereof, etc.
  • additives that can also be used include sulfur-containing antioxidants, phenolic or phosphite antioxidants, for example pentaerythritol ester of 3,5-di-tert- butyl-4-hydroxy-phenylpropionic acid (Irganox 1010), tri-(phenyl-2,4-di-tert- butyl)phosphite (Irgafos 168), and/or similar heat stabilizers of other trademarks, and amine-type light stabilizers and stabilizers of other types or synergistic mixtures of stabilizer, such as Irganox B225, Irganox B215 and others.
  • the content of these additives in the composition may be in the range of from 0 to 2 wt.%, preferably from 0.05 to 1.5 wt.%, most preferably from 0.1 to 1
  • compositions according to the present invention can be prepared by any known method of mixing thermoplastic polymers.
  • the composition is prepared by a one-step method comprising melt processing of a dry mixture of all ingredients of the composition in any suitable equipment, including single or twin screw extruders, closed rotary mixers, etc., wherein the dry mixture is previously prepared by any method known in the art.
  • the temperature used for mixing the components is traditional for this field and is determined by the properties of a particular polyethylene. More particularly, the components are mixed at a temperature higher than the melting points of polyethylenes constituting the composition and lower than their decomposition temperatures.
  • the temperature of mixing the components is preferably between 200 and 260°C, more preferably between 210 and 250°C.
  • Processing modes of the resulting composition do not differ from standard modes used and depend on rheological characteristics of polyethylene.
  • the most preferable method of processing is melt extrusion.
  • compositions obtained by the method according to the invention are suitable for use as raw materials for the manufacture of the sheath and/or insulation of electrical cables, the sheath of fiber-optic cables, various tubular articles, and the outer layer of insulation of pipelines.
  • LDPE LDPE 15303-003 and 15803-020, which are main brands produced by Tomskneftekhim, LLC;
  • the used isotactic PP was:
  • Borstar 6052 composition which is an industrial grade composition based on bimodal medium-density polyethylene produced by the Borstar two-reactor technology of Borealis company, was used as a comparative sample. This grade is used in the manufacture of the sheath of fiber optic cables. Methods of studying compositions
  • the melt flow rate was determined at a temperature of 190°C and under a load of 2.16 N, according to National State Standard 11645.
  • the tensile yield strength, ultimate strain at break and relative deformation at break were determined according to GOST 11262 at a test velocity of 50 mm/min.
  • the flexural modulus was determined according to ASTMD, 790, the type of testing was a three-point bend test at a test velocity of 1.3 mm/min.
  • the Shore D/1 hardness was determined according to National State Standard
  • the Vicat (10H) heat resistance test was determined according to ASTM 1525.
  • the melt strength was determined in a capillary rheometer Smart Rheo 2000.
  • the melt was forced through the capillary, filled into a drawing device and drawn with a constant acceleration. Once achieving a specific draw speed, the drawn thread broke.
  • the force fixed on a tensometer at the time of breaking the thread was considered as the melt strength.
  • the polyethylene melt strength was measured by using a capillary of 2 mm diameter at a temperature of 190°C.
  • the surface quality of polyethylene materials was evaluated using a Brabender laboratory single-screw extruder at an extrusion zone temperature of 150-160-170- 180°C (the extrusion temperature can be changed depending on the melt viscosity of a polyethylene composition), with a thread die diameter of 1.8 mm and a screw speed of 50-150 rpm.
  • the surface quality of the exiting and air-cooled polyethylene thread was evaluated visually: "+" if the smoothness and gloss of the surface are good, and if the smoothness and/or gloss of the surface is unsatisfactory.
  • compositions on an extrusion line First, a mechanical mixture of ingredients of a PE composition, the so-called charge, is prepared in the preliminary step of dry mixing by using standard mixing equipment under standard conditions at a temperature from 15 to 30°C.
  • the resulting charge mixture is loaded into a funnel or another dosing device of an extruder, preferably a twin-screw extruder, with an L/D of at least 30, preferably at least 35, and processed into the finished product - granules, by standard methods.
  • the maximum melt-processing temperature in the extrusion equipment is from 210 to 260°C.
  • Samples for physical and mechanical, thermal physical and other tests are prepared by a hot-pressing method under standard conditions at a temperature of 160 to
  • Test polymer material is prepared by melt processing of granulate of the main basic industrial grade LDPE, 15303-003, in a laboratory twin-screw extruder LTE-20- 44 at a maximum cylinder zone temperature of 220°C and a screw speed of 250 rpm.
  • the resulting material has a tensile strength at break of 13.7 MPa, a relative elongation at break of 600%, a Shore D/1s hardness of 49, Vicat heat resistance of 89°C, a melt strength MS 190/2/12 of 21.7 cN, and a good surface quality of the extruded polymer.
  • a mixture comprising 57 wt.% of LLDPE Daelim XP 9200, 38 wt.% of HDPE 273-83, and 5 wt.% of PP PPH030GP is prepared in a paddle mixer, the mixture is stirred for 2-10 minutes at room temperature and at nominal rotor speed for this equipment.
  • the dry mixture of the components, obtained in the first step is processed in a twin-screw extruder LTE-20-44 at a maximum cylinder zone temperature of 240°C and a screw speed of 250 rpm.
  • the resulting composition is characterized by a tensile strength at break of 36.0 MPa, a relative elongation at break of 770%, a Shore D/1s hardness of 60, VicatioH heat resistance of 112°C, a melt strength MS190/2/12 of 9.5 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 2 except that a charge mixture is prepared by using 65 wt.% of LDPE 15303-003, 30 wt.% of HDPE 276-73, and 5 wt.% : of PP PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 13.9 MPa, a relative elongation at break of 550%, a Shore D/1s hardness of 58, T vicat,0 heat resistance of 108°C, a melt strength MS 190/2/12 of 30.6 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 2 except that a charge mixture is prepared by using 50 wt.% of LDPE 15303-003, 20 wt.% of LLDPE Daelim XP 9200, and 30 wt.% of HDPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 21.0 MPa, a relative elongation at break of 640%, a Shore D/1s hardness of 58, VicatioH heat resistance of 108°C, a melt strength MS 190/2/12 of 43.8 cN, but a bad surface quality of the extruded polymer.
  • Example 5
  • the process is performed similarly to Example 2 except that a charge mixture is prepared by using 49.5 wt.% of LDPE 15303-003, 20 wt.% of LLDPE Daelim XP 9200, 30 wt.% of HOPE 276-73, and 0.5 wt.% of PP PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 22.3
  • Example 6 The process is performed similarly to Example 5 except that a charge mixture is prepared by using 1.0 wt.% of PP PPH030GP instead of 0.5 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 23.1 MPa, a relative elongation at break of 800%, a Shore D/1s hardness of 59, VicatioH heat resistance of 109°C, a melt strength MS 190/2/12 of 49.5 cN, and a good surface quality of the extruded polymer.
  • Example 5 The process is performed similarly to Example 5 except that a charge mixture is prepared by using 3.0 wt.% of PP PPH030GP instead of 0.5 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 25.4 MPa, a relative elongation at break of 890%, a Shore D/1s hardness of 59, VicatioH heat resistance of 110°C, a melt strength MS190/2/12 of 44.5 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 7 except that a charge mixture is prepared by using 3.0 wt.% of PPH270GP instead of 3.O wt% of PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 24.6 MPa, a relative elongation at break of 870%, a Shore D/1s hardness of 59, VicatioH heat resistance of 109°C, a melt strength MS190/2/12 of 45.8 cN, and a good surface quality of the extruded polymer.
  • Example 9
  • Example 10 The process is performed similarly to Example 5 except that a charge mixture is prepared by using 5.0 wt.% of PPH030GP instead of 0.5 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 23.0 MPa, a relative elongation at break of 810%, a Shore D/1s hardness of 60, T vicat,0 heat resistance of 112°C, a melt strength MS190/2/12 of 41.7 cN, and a good surface quality of the extruded polymer.
  • Example 10 Example 10
  • the process is performed similarly to Example 7 except that a charge mixture is prepared by using 3.0 wt.% of PPH450GP instead of 3.0 wt.% of PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 24.0 MPa, a relative elongation at break of 860%, a Shore D/1s hardness of 59, VicatlOH heat resistance of 109°C, a melt strength MS 190/2/12 of 44.7 cN, and a good surface quality of the extruded polymer.
  • Example 5 The process is performed similarly to Example 5 except that a charge mixture is prepared by using 10.0 wt.% of PPH030GP instead of 0.5 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 17.7
  • Example 12 The process is performed similarly to Example 8 except that a charge mixture is prepared by using 10 wt.% of PPH270GP instead of 3.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 22.3
  • Example 10 The process is performed similarly to Example 10 except that a charge mixture is prepared by using 10 wt.% of PPH450GP instead of 3.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 22.1 MPa, a relative elongation at break of 800%, a Shore D/1s hardness of 61, T vicat,0 heat resistance of 111°C, a melt strength MS190/2/12 of 37.8 cN, and a good surface quality of the extruded polymer.
  • Example 14 (comparative)
  • Example 4 The process is performed similarly to Example 4 (comparative) except that HOPE 273-83 is used instead of HOPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 22.5 MPa, a relative elongation at break of 700%, a Shore D/1s hardness of 58, T vicat,0 heat resistance of 109°C, a melt strength MS 190/2/12 of 49.8 cN, but a bad surface quality of the extruded polymer.
  • Example 14 The process is performed similarly to Example 14 (comparative) except that 49.0 wt.% instead of 50.0 wt.% of LDPE 15303-003 are used and 1.0 wt.% of PP PPH030GP is further introduced.
  • the resulting composition is characterized by a tensile strength at break of 25.5 MPa, a relative elongation at break of 830%, a Shore D/1s hardness of 59, T vicat,0 heat resistance of 110°C, a melt strength MS 190/2/12 of 55.5 cN, and a good surface quality of the extruded polymer.
  • Example 15 The process is performed similarly to Example 15 except that 47.0 wt.% instead of 49.0 wt.% of LDPE 15303-003 are used and 3.0 wt.% of PP PPH030GP are further introduced.
  • the resulting composition is characterized by a tensile strength at break of 26.5 MPa, a relative elongation at break of 840%, a Shore D/l s hardness of 60, T vicat,0 heat resistance of 111°C, a melt strength MS 190/2/12 of 54.3 cN, and a good surface quality of the extruded polymer.
  • Example 16 The process is performed similarly to Example 16 except that 45.0 wt.% instead of 47.0 wt.% of LDPE 15303-003 are used and 5.0 wt.% of PP PPH030GP are further introduced.
  • the resulting composition is characterized by a tensile strength at break of 23.7 MPa, a relative elongation at break of 830%, a Shore D/1s hardness of 61, VicatioH heat resistance of 113°C, a melt strength MS190/2/12 of 50.7 cN, and a good surface quality of the extruded polymer.
  • Example 18 The process is performed similarly to Example 16 except that 54.0 wt.% instead of 47.0 wt.% of LDPE 15303-003, 14 wt.% instead of 20 wt.% of LLDPE Daelim XP 9200, and 29.0 wt.% instead of 30.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 24.3 MPa, a relative elongation at break of 830%, a Shore D/1s hardness of 60, T vicat,0 heat resistance of 109°C, a melt strength MS190/2/12 of 65.7 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 18 except that 59.0 wt.% instead of 54.0 wt.% of LDPE 15303-003, 11 wt.% instead of 14 wt.% of LLDPE Daelim XP 9200, and 1.0 wt.% instead of 3.0 wt.% of PPH030GP are used.
  • the resulting composition is characterized by a tensile strength at break of 25.3 MPa, a relative elongation at break of 810%, a Shore D/1s hardness of 60, VicatioH heat resistance of 107°C, a melt strength MS190/2/12 of 76.9 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 18 except that 59.0 wt.% instead of 54.0 wt.% of LDPE 15303-003, 10.0 wt.% instead of 14.0 wt.% of LLDPE Daelim XP 9200, and 28.0 wt.% instead of 29.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 27.0
  • Example 21 The process is performed similarly to Example 19 except that 64.0 wt.% instead of 59.0 wt.% of LDPE 15303-003, 10.0 wt.% instead Of 11.0 wt.% of LLDPE Daelim XP 9200, and 25.0 wt.% instead of 29.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 17.9 MPa, a relative elongation at break of 670%, a Shore D/1s hardness of 59, VicatioH heat resistance of 107°C, a melt strength MS190/2/12 of 77.6 cN, and a good surface quality of the extruded polymer.
  • Example 22
  • Example 21 The process is performed similarly to Example 21 except that 69.0 wt.% instead of 64.0 wt.% of LDPE 15303-003 and 20.0 wt.% instead of 25.0 wt.% of HOPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 18.8
  • Example 23 The process is performed similarly to Example 22 except that 74.0 wt.% instead of 69.0 wt.% of LDPE 15303-003 and 15.0 wt.% instead of 20.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 19.5 MPa, a relative elongation at break of 720%, a Shore D/1s hardness of 56, T vicat,0 heat resistance of 106°C, a melt strength MS 190/2/12 of 62.0 cN, and a good surface quality of the extruded polymer.
  • Example 23 The process is performed similarly to Example 23 except that 79.0 wt.% instead of 74.0 wt.% of LDPE 15303-003 and 10.0 wt.% instead of 15.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 17.0
  • the process is performed similarly to Example 24 except that 81.0 wt.% instead of 79.0 wt.% of LDPE 15303-003 and 8.0 wt.% instead of 10.0 wt.% of HDPE 273-83 are used.
  • the resulting composition is characterized by a tensile strength at break of 15.9 MPa, a relative elongation at break of 540%, a Shore D/1s hardness of 52, T vicat,0 heat resistance of 103°C, a melt strength MS190/2/12 of 39.0 cN, and a good surface quality of the extruded polymer.
  • Example 26
  • Example 6 The process is performed similarly to Example 6 except that a charge mixture is prepared by using 10.0 wt.% of LLDPE Daelim XP 9200 instead of 20 wt.% and 40.0 wt.% of HDPE 276-73 instead of 30 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 17.4
  • Example 27 The process is performed similarly to Example 26 except that a charge mixture is prepared by using 29.0 wt.% of LDPE 15303-003 instead of 49.0 wt.% and 60 wt.% of HDPE 276-73 instead of 40.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 24.5 MPa, a relative elongation at break of 960%, a Shore D/1s hardness of 63 units, T vicat, heat resistance of 118°C, a melt strength MS190/2/12 of 31.8 cN, and a good surface quality of the extruded polymer.
  • Example 26 The process is performed similarly to Example 26 except that a charge mixture is prepared by using HDPE 273-83 instead of HDPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 17.7
  • Example 29 The process is performed similarly to Example 27 except that a charge mixture is prepared by using HDPE 273-83 instead of HDPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 28.0 MPa, a relative elongation at break of 880%, a Shore D/1s hardness of 62, VicatioH heat resistance of 119°C, a melt strength MS190/2/12 of 43.2 cN, and a good surface quality of the extruded polymer.
  • Example 30 The process is performed similarly to Example 29 except that a charge mixture is prepared by using 20.0 wt.% of LDPE 15303-003 instead of 29.0 wt.%, 9.0 wt.% of LLDPE Daelim XP 9200 instead of 10 wt.%, and 70.0 wt.% of HDPE 273-83 instead of 60.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 22.0
  • Example 31 (comparative) The process is performed similarly to Example 30 except that a charge mixture is prepared by using 8.0 wt.% of LLDPE Daelim XP 9200 instead of 9 wt.% and 72.0 wt.% of HDPE 273-83 instead of 70.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 21.8 MPa, a relative elongation at break of 670%, a Shore D/1s hardness of 63, T vicat, heat resistance of 118°C, a melt strength MS 190/2/12 of 26.1 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 5 except that a charge mixture is prepared by using 35 wt.% of LDPE instead of 49.5 wt.%, 40 wt.% of HDPE instead of i 30 wt.%, and 5 wt.% of PP PPH030GP instead of 0.5 wt.%.
  • the resulting composition is characterized by a melt strength MS 190/2/12 of 24.3 cN and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 6 except that a charge mixture is prepared by using PPR015 EX instead of PP PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 22.2 MPa, a relative elongation at break of 820%, a Shore D/1s hardness of 58, T vicat, heat resistance of 108°C, a melt strength MS 190/2/12 of 47.5 cN, and a good surface quality of the extruded polymer.
  • Example 34
  • Example 35 (comparative)
  • Example 30 The process is performed similarly to Example 30 except that a charge mixture is prepared by using 18.0 wt.% of LDPE 15303-003 instead of 20.0 wt.% and 11.0 wt.% of LLDPE Daelim XP 9200 instead of 9 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 21.9 MPa, a relative elongation at break of 650%, a Shore D/1s hardness of 63, T vicat, heat resistance of 119°C, a melt strength MS190/2/12 of 22.1 cN, and a good surface quality of the extruded polymer.
  • the process is performed similarly to Example 24 except that a charge mixture is prepared by using 85.0 wt.% of LDPE 15303-003 instead of 79.0 wt.%, 8.0 wt.% of LLDPE Daelim XP 9200 instead of 10 wt.%, and 6.0 wt.% of HDPE 273-83 instead of 10.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 15.5 MPa, a relative elongation at break of 520%, a Shore D/1s hardness of 50, T vicat, heat resistance of 100°C, a melt strength MS190/2/12 of 33.5 cN, and a good surface quality of the extruded polymer.
  • Example 36 The process is performed similarly to Example 36 (comparative) except that a charge mixture is prepared by using 83.0 wt.% of LDPE 15303-003 instead of 85.0 wt.% and 10.0 wt.% of LLDPE Daelim XP 9200 instead of 8 wt.%.
  • Example 37 The process is performed similarly to Example 37 (comparative) except that a charge mixture is prepared by using 39.0 wt.% of LDPE 15303-003 instead of 83.0 wt.%, 30.0 wt.% of LLDPE Daelim XP 9200 instead of 10 wt.%, and 30.0 wt.% of HDPE 273-83 instead of 6.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 25.9 MPa, a relative elongation at break of 850%, a Shore D/1s hardness of 58, T vicat, heat resistance of 111°C, a melt strength MS190/2/12 of 27.9 cN, and a good surface quality of the extruded polymer.
  • Example 38 The process is performed similarly to Example 38 (comparative) except that a charge mixture is prepared by using 62.0 wt.% of LDPE 15303-003 instead of 39.0 wt.%, 3.0 wt.% of LLDPE Daelim XP 9200 instead of 30 wt.%, and 5.0 wt.% of PP
  • the resulting composition is characterized by a tensile strength at break of 15.9 MPa, a relative elongation at break of 590%, a Shore D/1s hardness of 58, VicatioH heat resistance of 109°C, a melt strength MS190/2/12 of 28.9 cN, and a good surface quality of the extruded polymer.
  • Example 26 The process is performed similarly to Example 26 (comparative) except that a charge mixture is prepared by using 9.0 wt.% of LLDPE Daelim XP 9200 instead of 10 wt.%, 27.0 wti% of HDPE 276-73 instead of 40.0 wt:%, and 15.0 wt.% of PP PPH030GP instead of 1.0 wt.%.
  • the resulting composition is characterized with a tensile strength at break of 13.5 MPa, a relative elongation at break of 250%, a Shore D/1s hardness of 63, T vicat, heat resistance of 111°C, a melt strength MS190/2/12 of 27.8 cN, and a good surface quality of the extruded polymer.
  • Example 41 (comparative)
  • Example 40 The process is performed Similarly to Example 40 (comparative) except that a charge mixture is prepared by using HDPE 273-83 instead of HDPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 13.6 MPa, a relative elongation at break of 420%, a Shore D/1s hardness of 62, T vicat, heat resistance of 112°C, a melt strength MS190/2/12 of 31.8 cN, and a good surface quality of the extruded polymer.
  • Example 42 (comparative) The process is performed similarly to Example 9 except that a charge mixture is prepared by using 50.0 wt.% of LDPE 15803-020 instead of 45 wt.% of LDPE 15303- 003, 10.0 wt.% of LLDPE Daelim XP 020 instead of 20.0 wt.%, and 35.0 wt.% of HDPE 276-73 instead of 30.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 9.5
  • Example 43 (comparative) The process is performed similarly to Example 9 except that a charge mixture is prepared by using LLDPE PE 5118Q instead of LLDPE Daelim XP 9200.
  • the resulting composition is characterized by a tensile strength at break of 23.1 MPa, a relative elongation at break of 820%, a Shore D/1s hardness of 59, T vicat,0 heat resistance of 108°C, a melt strength MS 190/2/12 of 27.6 cN, and a good surface quality of the extruded polymer.
  • Example 9 The process is performed similarly to Example 9 except that a charge mixture is prepared by using LLDPE Daelim XP 9400 instead of LLDPE Daelim XP 9200.
  • the resulting composition is Characterized by a tensile strength at break of 21.3 MPa, a relative elongation at break of 760%, a Shore D/1s hardness of 58, T vicat,0 heat resistance of 107°C, a melt strength MS190/2/12 of 25.4 cN, and a good surface quality of the extruded polymer.
  • Example 4 The process is performed similarly to Example 4 (comparative) except that a charge mixture is prepared by using 60.0 wt.% of LDPE 15803-020 instead of 50 wt.% of LDPE 15303-003, 10.0 wt.% instead of 20.0 wt.% of LLDPE Daelim XP 020, and HDPE PE2NT-22-12 instead of HDPE 276-73.
  • the resulting composition is characterized by a tensile strength at break of 19.8 MPa, a relative elongation at break of 810%, a Shore D/1s hardness of 57, T vicat,0 heat resistance of 108°C, a melt strength MS190/2/12 of 33.5 cN, but a bad surface quality of the extruded polymer.
  • Example 46 The process is performed similarly to Example 45 (comparative) except that a charge mixture is prepared by using 9.7 wt.% of LLDPE Daelim XP 9200 instead of 10.0 wt.% and 29.3 wt.% of HDPE PE2HT-22-12 instead of 30.0 wt.% and by further introducing 1.0 wt.% of PP PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 20.8
  • Example 47 The process is performed similarly to Example 46 except that a charge mixture is prepared by using 3.0 wt.% of PP PPH030GP instead of 1.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 21.2 MPa, a relative elongation at break of 840%, a Shore D/1s hardness of 58, T vicat, heat resistance of 110°C, a melt strength MS190/2/12 of 35.7 cN, and a good surface quality of the extruded polymer.
  • Example 47 The process is performed similarly to Example 47 except that a charge mixture is prepared by using 5.0 wt.% of PP PPH030GP instead of 3.0 wt.%.
  • the resulting composition is Characterized by a tensile strength at break of 17.1 MPa, a relative elongation at break of 670%, a Shore D/1s hardness of 59, T vicat, heat resistance of 111°C, a melt strength MS190/2/12 of 33.8 cN, and a good surface quality of the extruded polymer.
  • Example 45 The process is performed similarly to Example 45 (comparative) except that a charge mixture is prepared by using 30.0 wt.% of LDPE 15303-003 instead of 60.0 wt.% and a mixture consisting of 10.0 wt.% of HDPE PE2NT-22-12 and 50.0 wt.% of HDPE 273-83 instead of 30.0 wt.% of HDPE PE2HT-22-12.
  • the resulting composition is characterized by a tensile strength at break of 24.1 MPa, a relative elongation at break of 720%, a Shore D/1s hardness of 60, T vicat, heat resistance of 115°C, a melt strength MS190/2/12 of 32.3 cN, but a bad surface quality of the extruded polymer.
  • Example 50
  • Example 49 The process is performed similarly to Example 49 (comparative) except that a charge mixture is prepared by using 9.7 wt.% of LLDPE Daelim XP 9200 instead of 10 wt.% and 49.3 wt.% of HDPE 273-83 instead of 50.0 wt.% and by further introducing 1.0 wt.% of PP PPH030GP.
  • the resulting composition is characterized by a tensile strength at break of 26.6 MPa, a relative elongation at break of 920%, a Shore D/1s hardness of 61, T vicat, heat resistance of 116°C, a melt strength MS190/2/12 of 35.0 cN, and a good surface quality of the extruded polymer.
  • Example 51
  • Example 50 The process is performed similarly to Example 50 (comparative) except that a charge mixture is prepared by using 9.0 wt.% of LLDPE Daelim XP 9200 instead of 9.7 wt.% and 48.0 wt.% of HDPE 273-83 instead of 49.3 wt.% and 3.0 wt.% of PP PPH030GP instead 1.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 27.2
  • Example 52 The process is performed similarly to Example 51 except that a charge mixture is prepared by using 8.0 wt.% of LLDPE Daelim XP 9200 instead of 9.0 wt.%, 47.0 wt.% of HDPE 273-83 instead of 48.0 wt.%, and 5.0 wt.% of PP PPH030GP instead of 3.0 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 18.0 MPa, a relative elongation at break of 660%, a Shore D/1s hardness of 62, T vicat, heat resistance of 118°C, a melt strength MS190/2/12 of 33.1 cN, and a good surface quality of the extruded polymer.
  • Example 1 The process is performed similarly to Example 50 except that a charge mixture is prepared by using 9.7 wt.% of LLDPE Daelim XP instead of 10.0 wt.% and 19.3 wt.% of HDPE 273-83 instead of 49.3 wt.%.
  • the resulting composition is characterized by a tensile strength at break of 22.5 MPa, a relative elongation at break of 850%, a Shore D/1s hardness of 57, VicatioH heat resistance of 111°C, a melt strength MS190/2/12 of 62.0 cN, and a good surface quality of the extruded polymer.
  • Table 1 shows the test formulations of PE compositions (Examples 1-11) and properties of the PE compositions
  • test results of the polyethylene compositions obtained in Examples 1-4 demonstrate disadvantages of the basic properties of LDPE 15303-003 (Example 1 - low values of physical and mechanical properties, surface hardness and heat resistance), the binary combination of LLDPE and HDPE in the presence of polypropylene (Example 2 - low melt strength), the binary combination of LDPE and HDPE with the addition of polypropylene (Example 3 - low physical and mechanical properties), the ternary mixture of LDPE, LLDPE and HDPE without polypropylene added (Example 4 - a bad surface quality of the extruded material).
  • Examples 40 and 41 demonstrate significant degradation of physical and mechanical characteristics (strength and relative elongation at break) and melt strength of triple compositions of PE when the concentration of polypropylene falls outside the claimed concentration range.
  • Comparative examples 25, 31, and 35-39 demonstrate a negative response of the basic properties of the compositions when reaching beyond the claimed limits of dosing the polymer components of the compositions, in particular LDPE, LLDPE, and HDPE.
  • Examples 42, 43, and 44 demonstrate a negative response of the basic properties of the compositions to the replacement of LDPE 15303-003 and LLDPE Daelim XP 9200 with their analogues with higher flow values: LDPE 15803- 020, Daelim XP 9400, and PE 5118Q.
  • Examples 49 (comparative), 50, 51, 52, and 53 demonstrate possible changes in the fluidity and basic properties of the compositions depending on the combination of low flow grade HDPE 273-83 and high flow grade HDPE PE2NT-22-12.
  • the result of the present invention is a polymer composition based on the use of certain ranges of three types of PE: LDPE, HDPE and LLDPE, a propylene polymer in a certain amount, and other optional desirable additives.
  • the composition is suitable for the production of materials by foaming and for the production of materials with good properties, such as heat resistance, surface hardness, elasticity and other optical and deformation-strength characteristics.
  • compositions provide a wide range of its applications, ranging from insulating materials to high-tech packaging products with high optical and strength characteristics.
  • the method for preparing materials from the composition according to the invention does not require expensive and potentially dangerous operations of radiation crosslinking and steps of additional purification of the resulting materials from byproducts of chemical crosslinking methods.

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Abstract

L'invention concerne des matériaux composites à base de mélanges de polyéthylène de diverses structures présentant une compatibilité améliorée des composants. La composition est utilisée dans les industries de la construction, du transport, des câbles et des conduites, dans la production de matériaux d'emballage et de produits obtenus par moussage. La composition de polyéthylène contient en % en poids, sur la base du poids total de la composition, de 20 à 84 % de polyéthylène basse densité (LDPE), de 10 à 70 % de polyéthylène haute densité (HOPE), de 5 à 25 % de polyéthylène basse densité linéaire (LLDPE), de 0,5 à 10 % de polypropylène (PP) et de 0 à 20 % d'autres additifs. L'invention concerne la production de compositions à base de mélanges de polyéthylène ayant une résistance à l'état fondu accrue, ce qui permet d'obtenir des produits par moussage, ainsi que des propriétés de déformation et de résistance améliorées, une dureté de surface et une résistance à la chaleur améliorées.
PCT/RU2019/000556 2019-08-06 2019-08-06 Composition à base de polyéthylène WO2021025578A1 (fr)

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CN116253949A (zh) * 2022-12-31 2023-06-13 江苏因倍思科技发展有限公司 一次性使用静脉营养输液袋及制备工艺
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WO2024079256A1 (fr) 2022-10-14 2024-04-18 Sabic Global Technologies B.V. Article expansé
CN116253949A (zh) * 2022-12-31 2023-06-13 江苏因倍思科技发展有限公司 一次性使用静脉营养输液袋及制备工艺

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