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ES442577A1 - PROCEDURE FOR THE PREPARATION OF POLYMERIC COMPOSITIONS WITH HIGH RESISTANCE TO IMPACT AT LOW TEMPERATURES. - Google Patents

PROCEDURE FOR THE PREPARATION OF POLYMERIC COMPOSITIONS WITH HIGH RESISTANCE TO IMPACT AT LOW TEMPERATURES.

Info

Publication number
ES442577A1
ES442577A1 ES442577A ES442577A ES442577A1 ES 442577 A1 ES442577 A1 ES 442577A1 ES 442577 A ES442577 A ES 442577A ES 442577 A ES442577 A ES 442577A ES 442577 A1 ES442577 A1 ES 442577A1
Authority
ES
Spain
Prior art keywords
ethylene
propylene
weight
proportion
fed
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
ES442577A
Other languages
Spanish (es)
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 ES442577A1 publication Critical patent/ES442577A1/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)
  • Compositions Of Macromolecular Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Process for the preparation of polymeric compositions with high resistance to impact at low temperatures, containing at least 50% by weight of isotactic polypropylene, in which embodiment a first stage is included in which propylene is polymerized in an inert hydrocarbon medium, in the presence of an osteospecific catalyst consisting of the product resulting from the reaction between a titanium trihalide and an aluminum-alkyl monohalide, and a second stage in which ethylene or ethylene/propylene compositions are fed to the polymerization suspension of the first step, in such a proportion that the amount of ethylene thus polymerized constitutes, at most, 20% by weight of the total polymer composition, characterized in that said second embodiment step comprises one or more steps of copolymerization of ethylene and propylene, wherein the molar ratio between ethylene and propylene is at least one of the following tees: the ratio between fed ethylene and propylene present in the system is between 1/99 and 40/60 and, preferably, between 5/95 and 30/70, and a proportion of copolymer ranging from 3 to 8% by weight is formed. of the total composition; or, optionally, the ratio between ethylene and propylene in the fed mixture is comprised between 60/40 and 85/15, forming a proportion of copolymer that ranges from 3 to 18% by weight of the total composition. (Machine-translation by Google Translate, not legally binding)
ES442577A 1974-11-14 1975-11-13 PROCEDURE FOR THE PREPARATION OF POLYMERIC COMPOSITIONS WITH HIGH RESISTANCE TO IMPACT AT LOW TEMPERATURES. Expired ES442577A1 (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
ES442577A1 true ES442577A1 (en) 1977-05-01

Family

ID=11226992

Family Applications (1)

Application Number Title Priority Date Filing Date
ES442577A Expired ES442577A1 (en) 1974-11-14 1975-11-13 PROCEDURE FOR THE PREPARATION OF POLYMERIC COMPOSITIONS WITH HIGH RESISTANCE TO IMPACT AT LOW TEMPERATURES.

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
FR2291220B1 (en) 1977-12-16
AT346578B (en) 1978-11-10
NO753725L (en) 1976-05-18
DE2550549A1 (en) 1976-05-20
IT1025699B (en) 1978-08-30
JPS5171390A (en) 1976-06-21
GB1528136A (en) 1978-10-11
ATA857375A (en) 1978-03-15
BE835527A (en) 1976-05-13
FR2291220A1 (en) 1976-06-11
CA1050192A (en) 1979-03-06
SE7512537L (en) 1976-05-17
NL7513084A (en) 1976-05-18

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