WO2001081074A1 - Process for improving stiffness and toughness of propylene -ethylene copolymer compositions - Google Patents

Process for improving stiffness and toughness of propylene -ethylene copolymer compositions Download PDF

Info

Publication number
WO2001081074A1
WO2001081074A1 PCT/EP2001/004087 EP0104087W WO0181074A1 WO 2001081074 A1 WO2001081074 A1 WO 2001081074A1 EP 0104087 W EP0104087 W EP 0104087W WO 0181074 A1 WO0181074 A1 WO 0181074A1
Authority
WO
WIPO (PCT)
Prior art keywords
propylene
copolymers
alpha
olefins
ethylene
Prior art date
Application number
PCT/EP2001/004087
Other languages
French (fr)
Inventor
Markus Gahleitner
Joachim Fiebig
Johannes Wolfschwenger
Christian Paulik
Original Assignee
Borealis Gmbh
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 Borealis Gmbh filed Critical Borealis Gmbh
Priority to AU62189/01A priority Critical patent/AU6218901A/en
Publication of WO2001081074A1 publication Critical patent/WO2001081074A1/en

Links

Classifications

    • 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
    • C08L23/10—Homopolymers or copolymers of propene
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0082—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0089—Impact strength or toughness
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/02—Heterophasic composition
    • 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

Definitions

  • the invention concerns a process for improving stiffness and toughness of propylene- ethylene copolymer compositions by heating of such compositions or parts made of such compositions.
  • the object of the invention was to overcome the problem of this high embrittlement and decreasing stiffness of polypropylenes during their lifetime.
  • HECO heterophasic ethylene-propylene copolymers
  • the present invention accordingly relates to a process for improving stiffness and toughness of ethylene-propylene polymer compositions, or of formed parts consisting essentially of said polymer compositions, said process comprising heating said polymer compositions or said parts for 1 to 100 h, preferably for 12 to 48 h, at a temperature of 75 °C to 150 °C, preferably of 100 to 140 °C, said polymer compositions essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene-homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C 2 - and C - to C 8 -alpha-olefins, the propylene- portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %,
  • compositions are preferably commercial products, e.g. like the heterophasic copolymers (HECO) of Borealis, consisting of 75 to 90 wt% of crystalline propylene- homopolymers or -random copolymers comprising 0 to 6 wt% of ethylene, the propylene- portion of said homopolymers or copolymers having an isotacticity of greater than 95 %, measured with IR spectroscopy according to the method described e.g.
  • HECO heterophasic copolymers
  • EP-A 255693 Cho, 1988
  • 10 to 25 wt% of elastomeric copolymers comprising 40 to 60 wt% of ethylene and 60 to 40 wt% of propylene, said elastomeric copolymers having a solubility in xylene at room temperature (about 20 to 25 °C) of about greater than 70 wt%.
  • a preferred heterophasic copolymer is e.g.
  • MC17 XMOD of Borealis which consists of 80 wt% of propylene homopolymer with an isotacticity of above 97% and 20 wt% of an elastomeric copolymer containing 60 wt% ethylene and 40 wt% of propylene, which is soluble in xylene (23 °C) to more than 80 wt%.
  • These polymer compositions are normally directly produced in serial polymerisations in multiple reactors. It is also possible to obtain these polymer compositions e.g. by mixing said crystalline and said elastomeric polymers.
  • compositions can usally also contain conventional polymer additives, among them antioxidants to prevent thermooxidative damage, UV-stabilisers to reduce photooxidative damage and processing aids like internal slip agents and antistatic agents preferably in a total amount of less than 2 wt%. Additionally, the compositions can also contain nucleating agents like talc, sodium benzoate or sodium 2,2'- methylene bis-(4,6-di-tert butylphenyl) phosphate to promote the crystallisation of the polymer in an amount of up to 3 wt%, preferably from 0.01 to 3 wt %.
  • conventional polymer additives among them antioxidants to prevent thermooxidative damage, UV-stabilisers to reduce photooxidative damage and processing aids like internal slip agents and antistatic agents preferably in a total amount of less than 2 wt%.
  • nucleating agents like talc, sodium benzoate or sodium 2,2'- methylene bis-(4,6-di-tert butylphenyl) phosphate to promote the
  • the compositions may also include conventional mineral fillers like talc, calcium carbonate or wollastonite as well as short glass fibers as reinforcing agents in a content of 0-40 wt%, preferably 0-20 wt%.
  • the stiffness of the polymer compositions may be measured e.g. as the elastic modulus, e.g. the flexural modulus according to ISO 178.
  • the toughness (or inverse brittleness respectively) may be measured e.g. as the impact strength, e.g. according to ISO 179.
  • ethylene-propylene polymer compositions which can be obtained by the above described process, and formed parts or articles, which consist essentially of said compositions.
  • Such formed parts or articles like e.g. blow-moulded bottles and containers, cast-extruded or blown films, injection-moulded packaging components or technical parts may be manufactured by any thermopolastic forming technique, e.g. by injection or blow moulding, extrusion etc. It is also possible to improve the stiffness and toughness of such formed parts or articles by heating them as described above for 1 to 100 h at 75 °C to 150 °C. This heating may also be performed, e.g., in the course of a sterilisation, drying or other heating process of said containers or bottles together with their contents, e.g. food or medicines.
  • the main advantage of said polymer compositions and of said parts consisting essentially of said compositions is that, besides an increase in stiffness, also their toughness is increased, and additionally that the toughness is maintained to a high extent also in storage and/or utilisation at room temperatures for a long time.
  • a further object of the invention is the use of heterophasic copolymers essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene- homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C 2 - and C - to C 8 -alpha-olefins, the propylene-portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %, and b) 5 to 35 wt%, preferably 10 to 25 wt% of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of
  • a further object of the invention is the use of said elastomeric copolymers as additional components to said crystalline propylene-polymers to improve stiffness and toughness of said crystalline propylene-polymers, by bringing together said elastomeric copolymers and said crystalline polymers and heating the thus obtained heterophasic copolymers, or parts constisting essentially of said heterophasic copolymers, for 1 to 100 h at 75 °C to 150 °C.
  • Samples of 80x10x4 mm were injection molded from a propylene homopolymer Daplen K2 XMOD (Borealis, MFR 230 °C/2,16 kg:8 g/10min, isotacticity above 97%) and stored at room temperature for 24 h, 336 h and 1563 h. Further samples were annealed after the injection molding for 24 h and 168 h at 80 °C, 110 °C and 140 °C and then also stored for 24 h, 336 h and 1563 h. Then the modulus (flexural modulus according to ISO 178 at 23 °C) and impact strength (notched impact strength according to ISO 179 1eA at 23 °C) were measured:

Abstract

A process for improving stiffness and toughness of ethylene-propylene polymer compositions, comprising crystalline propylene-homopolymers or propylene-random copolymers and elastomeric ethylene copolymers, or of formed parts consisting essentially of said polymer compositions, by heating said polymer composition or said parts for 1 to 100 h, at a temperature of 75 to 150 °C, preferably of 100 to 140 °C.

Description

Process for improving stiffness and toughness of propylene -ethylene copolymer compositions
The invention concerns a process for improving stiffness and toughness of propylene- ethylene copolymer compositions by heating of such compositions or parts made of such compositions.
For most parts made of polypropylene or its copolymers, good stiffness and good toughness is required. One of the major problems of such parts is that their physical properties continue to change by physical ageing during their further lifetime. While a certain increase in stiffness is normally regarded as rather positive for their performance, the simultaneous reduction of toughness is certainly negative and can strongly limit the applicability of such materials. This effect is known e.g. from "Journal of Applied Polymer Science" 10 (1966) 901-915", where the stiffness increase and parallel embrittlement of a polypropylene film at room temperature is studied, and also from "Polymer Testing 18 (1999) 257-266", where the relation between stiffness and impact strength of polypropylene homopolymers is investigated. In this literature it is shown that ageing at room temperature develops increasing stiffness combined with embrittlement (decreasing toughness). From this literature it is further known that the toughness of such materials can be improved by annealing at elevated temperatures. But unfortunately the gain in toughness by annealing is again lost by physical ageing during the further lifetime.
The object of the invention was to overcome the problem of this high embrittlement and decreasing stiffness of polypropylenes during their lifetime. Unexpectedly it was found that certain specific compositions of heterophasic ethylene-propylene copolymers (HECO), when heated to above about 65 °C exhibit an improvement of stiffness and toughness alike. Moreover, this improved toughness is surprisingly not reduced to the original level by further ageing at room temperature, but remains at much higher levels. The present invention accordingly relates to a process for improving stiffness and toughness of ethylene-propylene polymer compositions, or of formed parts consisting essentially of said polymer compositions, said process comprising heating said polymer compositions or said parts for 1 to 100 h, preferably for 12 to 48 h, at a temperature of 75 °C to 150 °C, preferably of 100 to 140 °C, said polymer compositions essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene-homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C2- and C - to C8-alpha-olefins, the propylene- portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %, b) 5 to 35 wt%, preferably 10 to 25 wt% of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of C3- to C8-alpha-olefins, said elastomeric copolymers being soluble in xylene at room temperature to more than 50 wt%, preferably to more than 70 wt%.
Said compositions are preferably commercial products, e.g. like the heterophasic copolymers (HECO) of Borealis, consisting of 75 to 90 wt% of crystalline propylene- homopolymers or -random copolymers comprising 0 to 6 wt% of ethylene, the propylene- portion of said homopolymers or copolymers having an isotacticity of greater than 95 %, measured with IR spectroscopy according to the method described e.g. in EP-A 255693 (Chisso, 1988), and 10 to 25 wt% of elastomeric copolymers comprising 40 to 60 wt% of ethylene and 60 to 40 wt% of propylene, said elastomeric copolymers having a solubility in xylene at room temperature (about 20 to 25 °C) of about greater than 70 wt%. A preferred heterophasic copolymer is e.g. MC17 XMOD of Borealis, which consists of 80 wt% of propylene homopolymer with an isotacticity of above 97% and 20 wt% of an elastomeric copolymer containing 60 wt% ethylene and 40 wt% of propylene, which is soluble in xylene (23 °C) to more than 80 wt%. These polymer compositions are normally directly produced in serial polymerisations in multiple reactors. It is also possible to obtain these polymer compositions e.g. by mixing said crystalline and said elastomeric polymers.
The compositions can usally also contain conventional polymer additives, among them antioxidants to prevent thermooxidative damage, UV-stabilisers to reduce photooxidative damage and processing aids like internal slip agents and antistatic agents preferably in a total amount of less than 2 wt%. Additionally, the compositions can also contain nucleating agents like talc, sodium benzoate or sodium 2,2'- methylene bis-(4,6-di-tert butylphenyl) phosphate to promote the crystallisation of the polymer in an amount of up to 3 wt%, preferably from 0.01 to 3 wt %. For achieving the necessary mechanical profile, the compositions may also include conventional mineral fillers like talc, calcium carbonate or wollastonite as well as short glass fibers as reinforcing agents in a content of 0-40 wt%, preferably 0-20 wt%. The stiffness of the polymer compositions may be measured e.g. as the elastic modulus, e.g. the flexural modulus according to ISO 178. The toughness (or inverse brittleness respectively) may be measured e.g. as the impact strength, e.g. according to ISO 179.
Further objects of the invention are ethylene-propylene polymer compositions, which can be obtained by the above described process, and formed parts or articles, which consist essentially of said compositions. Such formed parts or articles like e.g. blow-moulded bottles and containers, cast-extruded or blown films, injection-moulded packaging components or technical parts may be manufactured by any thermopolastic forming technique, e.g. by injection or blow moulding, extrusion etc. It is also possible to improve the stiffness and toughness of such formed parts or articles by heating them as described above for 1 to 100 h at 75 °C to 150 °C. This heating may also be performed, e.g., in the course of a sterilisation, drying or other heating process of said containers or bottles together with their contents, e.g. food or medicines.
The main advantage of said polymer compositions and of said parts consisting essentially of said compositions is that, besides an increase in stiffness, also their toughness is increased, and additionally that the toughness is maintained to a high extent also in storage and/or utilisation at room temperatures for a long time.
A further object of the invention is the use of heterophasic copolymers essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene- homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C2- and C - to C8-alpha-olefins, the propylene-portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %, and b) 5 to 35 wt%, preferably 10 to 25 wt% of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of C3- to Cs-alpha-olefins, said elastomeric copolymers being soluble in xylene at room temperature to more than 50 wt%, preferably to more than 70 wt%, to improve stiffness and toughness of crystalline propylene-hompolymers or -random-copolymers by heating said heterophasic copolymers or parts consisting essentially of said heterophasic copolymers for 1 to 100 h at 75 °C to 150 °C.
A further object of the invention is the use of said elastomeric copolymers as additional components to said crystalline propylene-polymers to improve stiffness and toughness of said crystalline propylene-polymers, by bringing together said elastomeric copolymers and said crystalline polymers and heating the thus obtained heterophasic copolymers, or parts constisting essentially of said heterophasic copolymers, for 1 to 100 h at 75 °C to 150 °C.
Example 1 (Comparative):
Samples of 80x10x4 mm were injection molded from a propylene homopolymer Daplen K2 XMOD (Borealis, MFR 230 °C/2,16 kg:8 g/10min, isotacticity above 97%) and stored at room temperature for 24 h, 336 h and 1563 h. Further samples were annealed after the injection molding for 24 h and 168 h at 80 °C, 110 °C and 140 °C and then also stored for 24 h, 336 h and 1563 h. Then the modulus (flexural modulus according to ISO 178 at 23 °C) and impact strength (notched impact strength according to ISO 179 1eA at 23 °C) were measured:
Modulus of Propylene Homopol mer (in MPa)
storaαe (23 °C) no heatinα 80 °C/24 h 110 °C/24 h 140 °C/24 h 140 °C/168 h
24 h 2037 2174 2234 2539 2606
336 h 2224 2310 2379 2739 2839
1563 h 2248 2327 2502 2903 3075
Impact Strenαth of Proovlene I Homopolvmer in (kJ/m2)
storaαe (23 °C) no heatinα 80 °C/24 h 110 °C/24 h 140 °C/24 h 140 °C/168
24 h 2,68 2,08 2,17 2,63 2,85
336 h 2,00 2,02 2,02 2,26 2,45
1563 h 1 ,98 1 ,94 1 ,98 2,07 2,11
Example 2:
Analogously to example 1 , samples were injection molded, annealed, stored and then their modulus and impact strength were measured, with the difference that instead of the homopolymer Daplen K 2 XMOD, the heterophasic copolymer Daplen MC 17 XMOD (Borealis, MFR 230 °C/2,16 kg:12 g/10min, isotacticity of matrix component greater than 97%, xylene solubles of elastomeric component greater than 80 wt%) was used. Modulus of Propylene Copolvmer (in Mpa)
storaαe (23 °C) no heatinα 80°C/24h 110°C/24h 140°C/24h 140°C/168h
24 h 1369 1509 1599 1778 1833
336 h 1538 1584 1648 1913 2007
1563 h 1562 1592 1716 1994 2096
Impact Strenαth of Propylene Copolvmer in (kJ/m2)
storaαe (23 °C) no heatinα 80°C/24h 110°C/24h 140°C/24h 140°C/168h
24 h 8,72 9,64 10,18 17,19 17,12
336 h 8,43 9,00 9,22 14,89 14,58
1563 h 8,28 8,47 9,16 14,67 13,73

Claims

Claims:
1. A process for improving stiffness and toughness of ethylene-propylene polymer compositions, or of formed parts consisting essentially of said polymer compositions, said process comprising heating said polymer compositions or said parts for 1 to 100 h, preferably for 12 to 48 h, at a temperature of 75 to 150 °C, preferably of 100 to 140 °C, said polymer compositions essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene- homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C2- and C4- to C8-alpha-olefins, the propylene-portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %, b) 5 to 35 wt%, preferably 10 to 25 wt% of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of C3- to C8-alpha-olefins, said elastomeric copolymers being soluble in xylene at room temperature to more than 50 wt%, preferably to more than 70 wt%.
2. The process of claim 1 , wherein said composition is a heterophasic copolymer, consisting of a) 75 to 90 wt% of crystalline propylene-homopolymer or -random copolymer comprising 0 to 6 wt% of ethylene, the propylene-portion of said homopolymer or copolymer having an isotacticity of greater than 95 %, and b) 10 to 25 wt% of elastomeric copolymers comprising 40 to 60 wt% of ethylene and 60 to 40 wt% of propylene, said elastomeric copolymers having a solubility in xylene at room temperature (about 20 to 25 °C) of about greater than 70 wt%.
3. Ethylene-propylene polymer compositions with improved stiffness and toughness obtainable by the process of claim 1 or 2.
4. Ethylene-propylene polymer compositions with improved stiffness and toughness obtainable by the process of claim 1 or 2, which additionally contain 0.01-3 wt% of nucleating agents to promote the crystallisation of the polymer.
5. Ethylene-propylene polymer compositions with improved stiffness and toughness obtainable by the process of claim 1 or 2, which additionally contain 0-40 wt%, preferably 0-20 wt% of conventional mineral fillers or glass fibers as reinforcements.
6. Formed parts with improved stiffness and toughness consisting essentially of ethylene-propylene polymer compositions obtainable by the process of claim 1 or 2.
7. Use of heterophasic copolymers essentially consisting of a) 65 to 95 wt%, preferably 75 to 90 wt%, of crystalline propylene-homopolymers and/or propylene- random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha- olefins consisting of the group of C2- and C4- to C8-alpha-olefins, the propylene- portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95 %, and b) 5 to 35 wt%, preferably 10 to 25 wt% of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of C3- to C8-alpha-olefins, said elastomeric copolymers being soluble in xylene at room temperature to more than 50 wt%, preferably to more than 70 wt%, to improve stiffness and toughness of crystalline propylene- hompolymers or -random-copolymers by heating said heterophasic copolymers or parts consisting essentially of said heterophasic copolymers for 1 to 100 h at 75 °C to 150 °C.
8. Use of elastomeric copolymers comprising 20 to 80 wt%, preferably 40 to 60 wt% of ethylene and of 80 to 20 wt%, preferably 60 to 40 wt% of alpha-olefins of the group consisting of C3- to C8-alpha-olefins, said elastomeric copolymers being soluble in xylene at room temperature to more than 50 wt%, preferably to more than 70 wt%, as additional components to crystalline propylene-homopolymers and/or propylene-random copolymers comprising 0 to 10 wt%, preferably 0 to 6 wt%, of alpha-olefins consisting of the group of C2- and C4- to C8-alpha-olefins, the propylene-portion of said homopolymers or copolymers having an isotacticity of greater than 90 %, preferably greater than 95%, to improve stiffness and toughness of said crystalline propylene-polymers, by bringing together said elastomeric and said crystalline polymers and heating the thus obtained heterophasic copolymers, or parts constisting essentially of said heterophasic copolymers, for 1 to 100 h at 75 °C to 150 °C.
PCT/EP2001/004087 2000-04-20 2001-04-10 Process for improving stiffness and toughness of propylene -ethylene copolymer compositions WO2001081074A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62189/01A AU6218901A (en) 2000-04-20 2001-04-10 Process for improving stiffness and toughness of propylene -ethylene copolymer compositions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00108618 2000-04-20
EP00108618.0 2000-04-20

Publications (1)

Publication Number Publication Date
WO2001081074A1 true WO2001081074A1 (en) 2001-11-01

Family

ID=8168524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/004087 WO2001081074A1 (en) 2000-04-20 2001-04-10 Process for improving stiffness and toughness of propylene -ethylene copolymer compositions

Country Status (2)

Country Link
AU (1) AU6218901A (en)
WO (1) WO2001081074A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1950242A1 (en) * 2007-01-23 2008-07-30 Borealis Technology Oy Hybrid composites
US8563673B2 (en) 2006-05-31 2013-10-22 Sumitomo Chemical Company, Limited Propylene-based resin molded article and method for producing the same
US10072139B2 (en) 2012-09-19 2018-09-11 Saudi Basic Industries Corporation Process for the preparation of a composition comprising heterophasic propylene co-polymer and talc

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157719A (en) * 1946-04-13 1964-11-17 Montedison Spa Production of vacuum-shaped articles of polypropylene
GB1015338A (en) * 1962-05-18 1965-12-31 Shell Int Research Process for the improvement of the impact strength of shaped polypropylene articles
EP0072232A2 (en) * 1981-08-10 1983-02-16 Ethicon, Inc. Polyolefin surgical devices and method for producing the same
WO1995032089A1 (en) * 1994-05-19 1995-11-30 Exxon Chemical Patents Inc. A method for increasing crystalline melting point

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157719A (en) * 1946-04-13 1964-11-17 Montedison Spa Production of vacuum-shaped articles of polypropylene
GB1015338A (en) * 1962-05-18 1965-12-31 Shell Int Research Process for the improvement of the impact strength of shaped polypropylene articles
EP0072232A2 (en) * 1981-08-10 1983-02-16 Ethicon, Inc. Polyolefin surgical devices and method for producing the same
WO1995032089A1 (en) * 1994-05-19 1995-11-30 Exxon Chemical Patents Inc. A method for increasing crystalline melting point

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8563673B2 (en) 2006-05-31 2013-10-22 Sumitomo Chemical Company, Limited Propylene-based resin molded article and method for producing the same
EP1950242A1 (en) * 2007-01-23 2008-07-30 Borealis Technology Oy Hybrid composites
WO2008089971A1 (en) * 2007-01-23 2008-07-31 Borealis Technology Oy Hybrid composites
US10072139B2 (en) 2012-09-19 2018-09-11 Saudi Basic Industries Corporation Process for the preparation of a composition comprising heterophasic propylene co-polymer and talc

Also Published As

Publication number Publication date
AU6218901A (en) 2001-11-07

Similar Documents

Publication Publication Date Title
US9428637B2 (en) Polypropylene compositions containing glass fiber fillers
US10538655B2 (en) Bamboo fibers reinforced polypropylene compositions
KR102641627B1 (en) Additive composition and method for producing a polymer composition using the same
US8779064B2 (en) Polypropylene resin composition with good transparence and good impact strength
CN114044966B (en) Anti-atomization polypropylene composition and preparation method and application thereof
EP3162844B1 (en) Polypropylene composition comprising a nucleating composition comprising aluminosilicate and an organic nucleating agent
KR101834078B1 (en) Polypropylene resin composition with low shrinkage and good appearance
WO2001081074A1 (en) Process for improving stiffness and toughness of propylene -ethylene copolymer compositions
KR100865255B1 (en) Polypropylene resin composition having improved impact strength and high transparency, and articles comprising the same
EP3497162B1 (en) Compositions comprising carbon fibers and at least one thermoplastic polyolefin elastomer
KR100537923B1 (en) Polypropylene resin composition with excellent melt flowability and excellent heat resistance and low temperature impact strength
AU669503B2 (en) Impact-resistant polyolefin molding composition
KR100484603B1 (en) Polypropylene resin compositions having good resistance to whitening, impact resistnace and transparency
KR100574287B1 (en) Polypropylene resin composition excellent in rigidity and impact resistance
KR20020049854A (en) Polypropylene Resin Composition Having High Crystallinity
KR100585329B1 (en) High isotactic polypropylene compositions
WO2022090105A1 (en) Polyolefins compositions obtained from recycled polyolefins
KR100656829B1 (en) High-crystalline polypropylene resin composition having excellent melting flowability, stiffness and low temperature impact strength
KR101330893B1 (en) Polypropylene resin composition
KR101842788B1 (en) Polypropylene resine material for blow molding with high softness and transparency and preparing method same
KR20040065079A (en) Polypropylene Resin Composition having Great Resistance to High Pressure, Impact Strength, and Transparency for Automotive applications
KR101123904B1 (en) Polypropylene resin composition and molded article prepared therefrom
KR102457624B1 (en) Ethylene-propylene copolymer resin composition having excellent mechanical properties and dimensional stability, method of manufacturing the same, and molded article manufactured thereby
US20240158624A1 (en) Polypropylene Resin Composition With Excellent Low-Temperature Impact Resistance And Article Molded Therefrom
KR101549329B1 (en) Polyolefin Resin Composition for Injection Molding

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP