WO2017160243A1 - Composition de polyoléfine pour moulage rotatif - Google Patents

Composition de polyoléfine pour moulage rotatif Download PDF

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Publication number
WO2017160243A1
WO2017160243A1 PCT/TH2017/000020 TH2017000020W WO2017160243A1 WO 2017160243 A1 WO2017160243 A1 WO 2017160243A1 TH 2017000020 W TH2017000020 W TH 2017000020W WO 2017160243 A1 WO2017160243 A1 WO 2017160243A1
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WO
WIPO (PCT)
Prior art keywords
polyolefin
unstabilized
polyolefin composition
composition according
stabilized
Prior art date
Application number
PCT/TH2017/000020
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English (en)
Inventor
Nopphawan Phonthammachai
Panya WONGPANIT
Original Assignee
Scg Chemicals Company Limited
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
Priority claimed from TH1601001538A external-priority patent/TH181002A/th
Application filed by Scg Chemicals Company Limited filed Critical Scg Chemicals Company Limited
Priority to SG11201807667TA priority Critical patent/SG11201807667TA/en
Priority to CN201780030367.XA priority patent/CN109153159A/zh
Publication of WO2017160243A1 publication Critical patent/WO2017160243A1/fr
Priority to PH12018501945A priority patent/PH12018501945A1/en

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    • 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
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould

Definitions

  • the present invention relates to polyolefin composition for rotational molding.
  • polyolefin hollow articles in particular the large articles such as ice container, box, water tanks, industrial tank, kayak, surfboard, etc. by injection molding, extrusion or blow molding may be not feasible due to high investment cost
  • the suitable manufacturing process of such articles is rotational molding which comprised of 4 steps: Loading, Hearing, Cooling and Demolding.
  • the main raw materials for rotational molding comprise polymer resin, stabilizer, pigment and additives. Such components are blended together before rotational molding process. There are two ways for blending which are dry blending and melt blending. Melt blending is preferred for the process due to the better color consistency and better appearance of the molded articles.
  • polymer resin for rotational molding is polyethylene because it provides balance characteristics in terms of mechanical properties, processability, and costs.
  • multilayer rotomolded tank which outer layer is mostly made of polyethylene and inner layer is made of polar polymer e.g. Nylon or Ethylene-vinyl alcohol copolymer which has resistance to fuel permeation resulting in fuel emission reduction to environment
  • rotomolded articles have to be filled inside their hollow cavity with polyurethane foam in order to provide necessary functions including weight reduction, buoyancy, dimensional integrity, thermal insulation and etc.
  • WO 2006000770 Al disclosed the improvement of adhesion between polyethylene wall and polyurethane foam by using plasma treated polyethylene powder for rotational molding process.
  • the functional group on the polyethylene surface increases the adhesion between polyethylene and polyurethane foam.
  • the plasma treatment is a high cost process and the quality of the plasma-treated polyethylene powder in terms of polyurethane foam adhesion depends upon polyethylene resin and its additive package as well as plasma treatment conditions.
  • US 4,440,899 disclosed a polyolefin composition for rotational molding having improved adhesion to polyurethane foam.
  • Said composition comprises slightly stabilized polyolefin or unstabilized polyolefin and stabilized polyolefin in the presence of stabilizer such as 2 -Hydroxy-4-n-octyloxy-benzophenone and Octadecyl-3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionate.
  • stabilizer such as 2 -Hydroxy-4-n-octyloxy-benzophenone and Octadecyl-3-(3,5-di-tert-butyl-4- hydroxyphenyl)propionate.
  • said slightly stabilized polyolefin or unstabilized polyolefin is capable of forming oxidized groups resulting in improved adhesion to polyurethane.
  • US 3,974,114 disclosed polyolefin composition for rotational molding comprising polyolefin, stabilizer and C 8 -C 18 fatty acid salt selected from calcium, lithium, magnesium, barium, cadmium and aluminum salt
  • the stabilizers are 2,6-Di-tert-butyl-p-crcsol (DBPC) and Dilauryl thiopropionate (DLTDP).
  • DBPC 2,6-Di-tert-butyl-p-crcsol
  • DLTDP Dilauryl thiopropionate
  • US 8,357,324 B2 disclosed a process for the production of polyethylene hollow articles employing one or more NO-acyl hindered amine as a stabilizer to reduce the heating time in rotomolding resulting in good mechanical property of the hollow articles.
  • Said process comprises charging the polyethylene having one or more NO-acyl hindered amine, filling this mixture into a mold, heating this mold in an oven to above 280° C , rotating the mold around at least 2 axes, cooling the mold while still rotating, opening it, and taking the resultant hollow article out
  • the present invention relates to a polyolefin composition for rotational molding comprising a stabilized polyolefin and an unstabilized polyolefin wherein the unstabilized polyolefin has a particle size in the range of 10 - 250 micron and a melt flow index in the range of 0.001 - 15.0 g/10 rnins (at 190°C, 5 kg) or 0.0002 - 3.0 g/10 mins (at 190°C, 2.16 kg).
  • the polyolefin composition further comprises a metal stearate.
  • the object of the present invention is to provide a polyolefin composition for rotational molding having several technical advantages.
  • the rotomolded product made from the polyolefin composition according to the present invention has good adhesion with other materials e.g. polyurethane foam, nylon etc. and good outer surface appearance mat is less color difference and pinhole on the surface.
  • the temperature for rotational molding the polyolefin composition according to the invention is lower whereas the obtained rotomolded product still have comparable tensile adhesion properties comparing with the polyolefin composition comprising unstabilized polyolefin having the average particle size and melt flow index out of the defined range according to the present invention.
  • Figure 1 shows ATR-FTER spectra of outer surface (the surface attaching to the mold) and inner surface (the surface attaching to the air inside the mold) of the rotomolded article made from polyolefin composition according to the present invention.
  • Figure 2 shows graph representing the relationship between the amount of unstabilized polyethylene in polyolefin composition and color difference value (Delta E) of the rotomolded article made from polyolefin composition according to the present invention.
  • a polyolefin composition for rotational molding comprises a stabilized polyolefin and an unstabilized polyolefin.
  • the unstabilized polyolefin has an average particle size in the range of 10-250 micron and a melt flow index in the range of 0.001-15.0 g/10 mins (at 19°C, 5 kg) or 0.0002-3.0 g/10 mins (at 190°C, 2.16 kg)
  • the unstabilized polyolefin has the average particle size in the range of 50-250 micron, more preferably 100-250 micron.
  • the technical advantages of the unstabilized polyolefin having the selected average particle size according to the present invention are no segregation between the stabilized and the unstabilized polyolefin when they are mixed and stored in powder form and the obtained rotomolded product has good appearance with very few surface pinhole or pinhole-free surface comparing with using the unstabilized polyolefin having the average particle size out of the defined range according to the present invention.
  • the merit of this selected average particle size is that it circumvents the necessity of the color matching step for the unstabilized polyolefin and the stabilized polyolefin.
  • the unstabilized polyolefin having no pigments or colorants can be mixed with the colored stabilized polyolefin and formed the rotomolded product which has good appearance without stone effect [The stone effect is the phenomena which the non-colored unstabilized polyolefin appears on the surface of the colored rotomolded product resulting in color non-umformity and poor appearance.]
  • this inventive polyolefin composition provides a cost saving. From the test result, it was found that the average particle size of more than 250 micron of the unstabilized polyolefin can cause large pinhole, high variation of pinhole size and uneven distribution of pinhole on the surface.
  • the stone effect is also observed in case of using the polyolefin composition comprising of the colored stabilized polyolefin and the unstabilized polyolefin having no pigments or colorants.
  • the unstabilized polyolefin should have the average particle size from 100 micron, but not larger than 250 micron to obtain the excellent rotomolded product
  • the unstabilized polyolefin preferablyhas a melt flow index in the range of 0.001 - 5.0 g/10 mins (at 19°C, 5 kg) or 0.0002 - 1.0 g/10 mins (at 190°C, 2.16 kg), more preferably has a melt flow index in the range of 0.001 - 3.0 g/10 mins (at 190°C, 5 kg) or 0.0002 - 0.6 g/10 mins (at 190°C, 2.16 kg)
  • the technical advantage of the unstabilized polyolefin having the selected melt flow index is the obtained rotomolded product having good adhesion with other materials e.g. polyuremane foam, nylon, etc. This is because the unstabilized polyolefin having the melt flow index not more man 15.0 g/10 mins (at 190°C, 5 kg) or not more man 3.0 g/10 mins (at 190°C, 2.16 kg) provides the rougher inner surface (the surface attaching to other material) resulting in better adhesion with other materials comparing with the unstabilized polyolefin having the meh flow index higher than the selected melt flow index.
  • the unstabilized polyolefin having melt flow index of less man 0.001 g/10 mins (at 190°C, 5 kg) or less man 0.0002 g/10 mins (at 190°C, 2.16 kg) will cause more pinhole on the surface of the rotomolded product. In addition, it is quite difficult to be supplied.
  • the unstabilized polyolefin has a melting point at least 4°C higher than the stabilized polyolefin. This results in the inner surface (the surface attaching to other material) of the rotomolded articles mostly comprising of the unstabilized polyolefin and the outer surface (the surface attaching to the mold) mostly comprising of the stabilized polyolefin. Consequently, the obtained rotomolded product has strong adhesion with the target materials and also has high strength and durability resulting from stabilizer in the stabilized polyolefin.
  • the unstabilized polyolefin is in an amount of 0.01 - 15% by weight, preferably 0.01 - 10% by weight, and more preferably 0.01 - 6% by weight based on total weight of the polyolefin composition.
  • the rotomolded product with the selected amount of the unstabilized polyolefin has no or slight color difference comparing with mat of higher amount of the unstabilized polyolefin.
  • higher amount of the unstabilized polyolefin will cause more pinhole, larger pinhole size as well as high variation of pinhole size distribution presented on the outer surface.
  • the stabilized polyolefin comprises a polyolefin and a stabilizer.
  • the stabilizer is organosulfides compound, phenolic compound, organophosphorus compound which is organophosphate, organophosphonite, hindered amine compound, or a mixture thereof.
  • stabilizer is phenolic compound, organophosphite, hindered amine compound, or a mixture thereof.
  • organophosphorus compound stabilizer examples include Bis(2,4-di-tert-butyl-6-methylphenyl)ethyl phosphate or Tris(2,4-ditert- butylphenyl)phosphite.
  • the stabilizer is in an amount of 0.005-02% by weight based on total weight of the stabilized polyolefin.
  • the stabilized polyolefin further comprises a pigment
  • a pigment Subjecting to rotational molding, polyolefin composition according to the present invention gives no or little color difference even using the unstabilized polyolefin without any pigment or colorants.
  • the stabilized polyolefin is in an amount of 85-
  • stabilized polyolefin in the said amount gives the technical advantage as well as the use of unstabilized polyolefin amount as previously mentioned.
  • the stabilized polyolefin and the unstabilized polyolefin can be the same or different polyolefin type, preferably is the same polyolefin type.
  • the stabilized polyolefin and the unstabilized polyolefin are polyethylene, polypropylene or a mixture thereof.
  • the stabilized polyolefin according to the present invention can be prepared by melt blending. Mixing polyolefin, additives, pigment or colorant and stabilizer can be processed by twin-screw extruder.
  • the polyolefin composition for rotational molding further comprises a metal stearate.
  • the metal stearate is zinc stearate, calcium stearate, magnesium stearate, aluminium stearate or a mixture thereof.
  • the metal stearate is in an amount of 0.004-0.04% by weight based on total weight of the polyolefin composition.
  • Polyolefin composition in the presence of metal stearate according to the present invention could give technical advantage.
  • PIAT peak internal air temperature
  • the molded product obtained from polyolefin composition in the presence of metal stearate shows fewer pinholes than that obtained from polyolefin composition in the absence of metal stearate.
  • the molded product with the pinhole-free surface could be attained at lower PIAT by utilizing polyolefin composition in the presence of metal stearate.
  • the polyolefin composition for rotational molding may be prepared by high-speed mixer with the speed of 500-1500 rpm for 2-8 minutes to obtain a good compatible polyolefin composition.
  • the polyolefin composition for rotational molding according to the present invention has the important characteristics such as components, an amount of the components, and others which gives technical advantage to rotomolded articles as mentioned above.
  • the polyolefin composition for rotational molding is not limited to the scope of the invention. Indeed, various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the present invention.
  • Polyolefin composition of this invention shows the good adhesion to polyurethane foam which results from the oxidation of unstabilized polyolefin during the molding process.
  • the said oxidation can be characterized by Attenuated Total Reflectance Fourier Transform Infrared
  • the adhesion between the rotomolded product and polyurethane foam is tested by determining tensile strength according to ASTM D1623.
  • the rotomolded samples can be prepared as follows;
  • Sample 1 is molded by using polyolefin composition comprising stabilized polyethylene powder with the average particle size of 300 micron and T m at 124°C.
  • Sample 2 is molded by using polyolefin composition comprising 95% by weight of stabilized polyethylene powder with the average particle size of 300 micron and T m at 124°C and 5% by weight of unstabilized polyethylene powder with the average particle size of 165 micron andT m at l29°C.
  • Stabilized polyethylene powder in polyolefin composition in sample 1 and sample 2 comprising stabilizer mixture of 0.03% by weight of phenolic compound and 0.1% by weight of organophosphite based on total weight of said stabilized polyethylene powder.
  • An internal air temperature is the key processing parameter to track the heating cycle during rotomolding. Physical and chemical properties of resultant rotomolded parts are strongly related to a maximum temperature of the internal air or normally known as peak internal air temperature (PIAT).
  • PIAT peak internal air temperature
  • tensile strength is determined as a function of PIAT. It was found that for Sample 1, PIAT to attain the tensile strength more man 200 kPa is higher than 238°C. Sample 2, PIAT to attain the tensile strength more man 200 kPa is about 220 °G.
  • polyolefin composition samples with unstabilized polyolefin having various average particle size were prepared and studied.
  • Samples of polyolefin composition (1-4) comprising of
  • Said stabilized polyethylene comprises polyethylene, pigment and stabilizer which comprises 0.1% by weight of hindered amine compound and 0.015% by weight of organophosphite based on total weight of stabilized polyethylene, and
  • Said unstabilized polyethylene has melt flow index of 0.030 g/10 mins (at 190°C, 5 kg) and T m at 129°C.
  • the PIAT during rotomolding was set at 180 °C.
  • molded article from polyolefm composition comprising unstabilized polyethylene having the average particle size of 670 micron (Sample 4) showed stone effect on the outer surface of the sample.
  • the molded samples from polyolefin comprising unstabilized polyethylene having the average particle size more than 250 micron showed the unacceptable surface appearance that is larger pinhole size as well as high variation of pinhole size distribution presented on the outer surface.
  • melt flow index of unstabilized polyolefin according to the present invention, two polyolefin composition samples with unstabilized polyolefin having various melt flow index were prepared and studied as follows,
  • Two samples of polyolefin composition contain 95% by weight of stabilized polyethylene which said stabilized polyethylene comprises polyethylene and stabilizer.
  • the stabilizer is the mixture of 0.1% by weight of hindered amine compound and 0.015% by weight of organophosphite based on the total weight of stabilized polyethylene.
  • Said stabilized polyethylene has melt flow index of 3.5 g/10 mins (at 190°C, 2.16 kg), density of 0.932 g/cm 3 , T m at 124°C and average particle size of 300 micron.
  • polyolefin composition sample 1 said stabilized polyethylene was mixed with 5% by weight of unstabilized polyethylene having an average particle size of 165 micron, melt flow index of 7.5 g/10 mins (at 190°C, 2.16 kg) and T m at 131°C.
  • said stabilized polyethylene was mixed with 5% by weight of unstabilized polyethylene having an average particle size of 165 micron, melt flow index of 0.03 g/10 mins (at 190°C, 5.0 kg) and T m at 129°C.
  • mat polyolefin composition in the presence of unstabilized polyethylene having melt flow index gives advantages which are 1) reduction of the energy consumption and heating time (luring rotomolding and 2) the rotomolded article has an improved adhesion with polyurethane foam and good mechanical properties, comparing to the use of unstabilized polyethylene having higher melt flow index.
  • Table 2 Effect of melt flow index of unstabilized polyethylene on inner surface appearance of rotomolded articles and tensile strength between polyethylene wall and polyurethane foam.
  • critical PIAT is the lowest PIAT which the carbonyl peak began to be detected by ATR-FTIR technique.
  • polyolefin composition sample with various amount of unstabilized polyolefin were prepared to study the effect on the appearance of the article e.g. surface pinhole, as follows,
  • stabilized polyethylene having melt flow index of 3.5 g/10 mins (at 190°C, 2.16 kg), density of 0.932 g/cm 3 , T Formula, at 124°C and average particle size of 300 micron.
  • Said stabilized polyethylene comprises polyethylene, pigment and stabilizer mixture which comprises 0.03% by weight of phenolic compound and 0.1% by weight of organophosphite based on total weight of stabilized polyethylene, and
  • Unstabilized polyethylene having various amount as shown in Table 3. Said unstabilized polyethylene has average particle size of 165 micron, melt flow index of 0.030 g/10 mins (at 190°C, 5 kg) and T m at 129°C.
  • the obtained rotomolded samples were subjected to test the effect of unstabilized polyolefin on sample color.
  • the color difference (Delta E) at 2.3 was set to be an upper limit for the color tolerance.
  • color difference can be determined by Benchtop Spectrophotometer, Hunterlab and can be calculated from the following equation;
  • ⁇ L is the difference of lightness
  • ⁇ a is the difference of redness-greenness
  • the unstabilized polyethylene amount according to the present invention which is 0.01-15% by weight, gives acceptable appearance mat is few and small pinhole. Besides, at the suitable amount of unstabilized polyethylene, 0.01- 6% by weight allows the excellent and acceptable appearance due to low color difference value.
  • metal stearate in polyotefin composition according to the present invention, the effect of metal stearate was studies as follows;
  • Samples of Polyolefm composition (1-3) comprises
  • Stabilized polyethylene having melt flow index of 3.5 g/10 mins (at 190°C, 2.16 kg), density of 0.932 g/cm 3 , T m of 124 °C and average particle size of 300 micron.
  • Stabilized polyethylene comprises polyethylene, pigment and stabilizer which is the mixture of 0.03% by weight of phenolic compound and 0.1% by weight of organophosphate based on total weight of stabilized polyethylene.
  • calcium stearate is mixed with unstabilized polyethylene.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Moulding By Coating Moulds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition de polyoléfine pour moulage rotatif comprenant une polyoléfine stabilisée et une polyoléfine non stabilisée, la polyoléfine non stabilisée ayant une taille de particule moyenne de 10 à 250 micromètres et ayant un indice de fluidité à l'état fondu dans la plage de 0,001 à 15,0 g/10 min (à 190 °C, 5 kg) ou de 0,0002 à 3,0 g/10 min (à 190 °C, 2,16 kg). Ladite composition de polyoléfine comprend en outre du stéarate métallique.
PCT/TH2017/000020 2016-03-18 2017-03-16 Composition de polyoléfine pour moulage rotatif WO2017160243A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SG11201807667TA SG11201807667TA (en) 2016-03-18 2017-03-16 Polyolefin composition for rotational molding
CN201780030367.XA CN109153159A (zh) 2016-03-18 2017-03-16 用于旋转模塑的聚烯烃组合物
PH12018501945A PH12018501945A1 (en) 2016-03-18 2018-09-11 Polyolefin composition for rotational molding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TH1601001538 2016-03-18
TH1601001538A TH181002A (th) 2016-03-18 องค์ประกอบพอลิโอเลฟินสำหรับการขึ้นรูปแบบหมุน

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WO2017160243A1 true WO2017160243A1 (fr) 2017-09-21

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PCT/TH2017/000020 WO2017160243A1 (fr) 2016-03-18 2017-03-16 Composition de polyoléfine pour moulage rotatif

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CN (1) CN109153159A (fr)
PH (1) PH12018501945A1 (fr)
SG (1) SG11201807667TA (fr)
WO (1) WO2017160243A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021165805A1 (fr) * 2020-02-17 2021-08-26 Nova Chemicals (International) S.A. Composition de rotomoulage
WO2021165790A1 (fr) * 2020-02-17 2021-08-26 Nova Chemicals (International) S.A. Composition de rotomoulage
KR102702537B1 (ko) 2020-02-17 2024-09-04 노바 케미컬즈 (인터내셔널) 소시에테 아노님 회전 몰딩 조성물

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US3974114A (en) 1969-08-04 1976-08-10 Union Carbide Corporation Compound for pinhole-free rotational casting
US4440899A (en) 1980-08-30 1984-04-03 Stamicarbon B.V. Polyolefin powder compositions, in particular polyethylene powder compositions, with improved adhesion, and objects made or to be made of such compositions
US5783611A (en) * 1996-05-24 1998-07-21 Millennium Petrochemicals Inc. Composition and process for rotational molding foamed articles
WO2006000770A1 (fr) 2004-06-26 2006-01-05 Clarehill Plastics Ltd Produit et procede de rotomoulage
US8357324B2 (en) 2009-04-21 2013-01-22 Basf Se Rotomolding process for polyethylene articles
US20130149478A1 (en) * 2011-12-12 2013-06-13 Exxonmobil Chemical Patents Inc. Powder, Compositions Thereof, Processes for Making the Same, and Articles Made Therefrom
EP2740761A1 (fr) * 2012-12-05 2014-06-11 Borealis AG Composition de polyéthylène présentant un équilibre amélioré de résistance à la propagation des fissures lentes, la résistance aux chocs et une résistance à la pression des tuyaux pour des applications de tuyaux

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TW200504093A (en) * 2003-05-12 2005-02-01 Dow Global Technologies Inc Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom
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Publication number Priority date Publication date Assignee Title
US3974114A (en) 1969-08-04 1976-08-10 Union Carbide Corporation Compound for pinhole-free rotational casting
US4440899A (en) 1980-08-30 1984-04-03 Stamicarbon B.V. Polyolefin powder compositions, in particular polyethylene powder compositions, with improved adhesion, and objects made or to be made of such compositions
US5783611A (en) * 1996-05-24 1998-07-21 Millennium Petrochemicals Inc. Composition and process for rotational molding foamed articles
WO2006000770A1 (fr) 2004-06-26 2006-01-05 Clarehill Plastics Ltd Produit et procede de rotomoulage
US8357324B2 (en) 2009-04-21 2013-01-22 Basf Se Rotomolding process for polyethylene articles
US20130149478A1 (en) * 2011-12-12 2013-06-13 Exxonmobil Chemical Patents Inc. Powder, Compositions Thereof, Processes for Making the Same, and Articles Made Therefrom
EP2740761A1 (fr) * 2012-12-05 2014-06-11 Borealis AG Composition de polyéthylène présentant un équilibre amélioré de résistance à la propagation des fissures lentes, la résistance aux chocs et une résistance à la pression des tuyaux pour des applications de tuyaux

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021165805A1 (fr) * 2020-02-17 2021-08-26 Nova Chemicals (International) S.A. Composition de rotomoulage
WO2021165790A1 (fr) * 2020-02-17 2021-08-26 Nova Chemicals (International) S.A. Composition de rotomoulage
CN115052734A (zh) * 2020-02-17 2022-09-13 诺瓦化学品(国际)股份有限公司 滚塑组合物
KR102702537B1 (ko) 2020-02-17 2024-09-04 노바 케미컬즈 (인터내셔널) 소시에테 아노님 회전 몰딩 조성물

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PH12018501945A1 (en) 2019-06-17
CN109153159A (zh) 2019-01-04

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