GB1528136A - Olefin polymeric compositions - Google Patents

Olefin polymeric compositions

Info

Publication number
GB1528136A
GB1528136A GB46367/75A GB4636775A GB1528136A GB 1528136 A GB1528136 A GB 1528136A GB 46367/75 A GB46367/75 A GB 46367/75A GB 4636775 A GB4636775 A GB 4636775A GB 1528136 A GB1528136 A GB 1528136A
Authority
GB
United Kingdom
Prior art keywords
propylene
ethylene
nov
isotactic polypropylene
content
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB46367/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montedison SpA
Original Assignee
Montedison SpA
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 Montedison SpA filed Critical Montedison SpA
Publication of GB1528136A publication Critical patent/GB1528136A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
    • C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Graft Or Block Polymers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

1528136 Sequential polymerization of ethylene and propylene MONTEDISON SpA 10 Nov 1975 [14 Nov 1974] 46367/75 Heading C3P A process for the production of polymer compositions comprising isotactic polypropylene and minor amounts of ethylene/propylene copolymers comprises (A) polymerizing propylene in a hydrocarbon medium in the presence of a stereospecific catalyst to yield substantially isotactic polypropylene, (B) copolymerizing ethylene and propylene with a propylene-rich mixture, and (C) copolymerizing ethylene and propylene with an ethylene-rich mixture, the total ethylene content of the final product not exceeding 20% by weight. The propylene content after stage (A) may be adjusted by flashing off excess unreacted monomer and/or addition of propylene with the ethylene feed.
GB46367/75A 1974-11-14 1975-11-10 Olefin polymeric compositions Expired GB1528136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT29436/74A IT1025699B (en) 1974-11-14 1974-11-14 PROCEDURE FOR PREPARATION OF POLYPROPYLENE COMPOSITIONS OF IMPACT RESISTANCE AT LOW TEMPERATURE

Publications (1)

Publication Number Publication Date
GB1528136A true GB1528136A (en) 1978-10-11

Family

ID=11226992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46367/75A Expired GB1528136A (en) 1974-11-14 1975-11-10 Olefin polymeric compositions

Country Status (12)

Country Link
JP (1) JPS5171390A (en)
AT (1) AT346578B (en)
BE (1) BE835527A (en)
CA (1) CA1050192A (en)
DE (1) DE2550549A1 (en)
ES (1) ES442577A1 (en)
FR (1) FR2291220A1 (en)
GB (1) GB1528136A (en)
IT (1) IT1025699B (en)
NL (1) NL7513084A (en)
NO (1) NO753725L (en)
SE (1) SE7512537L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5247091A (en) * 1975-10-13 1977-04-14 Sumitomo Chem Co Ltd Process for preparing block copolymers
JPS54139693A (en) * 1978-04-21 1979-10-30 Sumitomo Chem Co Ltd Preparation of propylene-ethylene block copolymer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810415B2 (en) * 1974-02-27 1983-02-25 三菱油化株式会社 Fragile polypropylene

Also Published As

Publication number Publication date
NO753725L (en) 1976-05-18
ES442577A1 (en) 1977-05-01
IT1025699B (en) 1978-08-30
FR2291220A1 (en) 1976-06-11
NL7513084A (en) 1976-05-18
ATA857375A (en) 1978-03-15
DE2550549A1 (en) 1976-05-20
SE7512537L (en) 1976-05-17
AT346578B (en) 1978-11-10
CA1050192A (en) 1979-03-06
BE835527A (en) 1976-05-13
FR2291220B1 (en) 1977-12-16
JPS5171390A (en) 1976-06-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee