GB1042178A - Narrowing the molecular weight distribution of polyolefins - Google Patents

Narrowing the molecular weight distribution of polyolefins

Info

Publication number
GB1042178A
GB1042178A GB31287/63A GB3128763A GB1042178A GB 1042178 A GB1042178 A GB 1042178A GB 31287/63 A GB31287/63 A GB 31287/63A GB 3128763 A GB3128763 A GB 3128763A GB 1042178 A GB1042178 A GB 1042178A
Authority
GB
United Kingdom
Prior art keywords
molecular weight
weight distribution
polyolefins
narrowing
polyolefin
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
GB31287/63A
Inventor
Hans Georg Trieschmann
Hans Moeller
Georg Schmidtthomee
Christian Alt
Rudolf Herbeck
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1042178A publication Critical patent/GB1042178A/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
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/50—Partial depolymerisation
    • 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
    • C08F2810/00—Chemical modification of a polymer
    • C08F2810/10—Chemical modification of a polymer including a reactive processing step which leads, inter alia, to morphological and/or rheological modifications, e.g. visbreaking

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The molecular weight distribution of a polyolefin is narrowed by a process wherein the polyolefin is brought for 0.001 to 100 seconds into a shear gradient whose speed gradient is from 1500 to 200,000 seconds-1. The process may be effected in a screw extruder, a high-speed kneader or a roll mill, and may be in the presence or absence of oxygen. Stabilizers (e.g. see Example 1) also may be present.
GB31287/63A 1962-08-31 1963-08-08 Narrowing the molecular weight distribution of polyolefins Expired GB1042178A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEB0068652 1962-08-31
DEB0070866 1963-02-23

Publications (1)

Publication Number Publication Date
GB1042178A true GB1042178A (en) 1966-09-14

Family

ID=25966360

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31287/63A Expired GB1042178A (en) 1962-08-31 1963-08-08 Narrowing the molecular weight distribution of polyolefins

Country Status (4)

Country Link
BE (1) BE636816A (en)
FR (1) FR1373879A (en)
GB (1) GB1042178A (en)
NL (1) NL297178A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2056681A5 (en) * 1969-08-09 1971-05-14 Basf Ag
FR2230665A1 (en) * 1973-05-21 1974-12-20 Dart Ind Inc
US3996310A (en) * 1974-08-29 1976-12-07 Exxon Research And Engineering Company Polymers containing non-extractable/non-volatile additives and processes for their preparation
US4639495A (en) * 1981-12-21 1987-01-27 E. I. Du Pont De Nemours And Company Extruding process for preparing functionalized polyolefin polymers
US5079283A (en) * 1990-03-26 1992-01-07 Ferro Corporation Free-radical modified fire-retardant polypropylenes
US6060584A (en) * 1998-05-13 2000-05-09 Eastman Chemical Company Process for the degradation of polyolefins
WO2001092355A2 (en) * 2000-05-30 2001-12-06 Basell Polyolefine Gmbh For producing propylene polymers that are suited for fiber spinning
US6433133B1 (en) 1999-11-16 2002-08-13 Eastman Chemical Company Process for reducing the weight average molecular weight and melt index ratio of polyethylenes and polyethylene products

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678024A (en) * 1970-01-05 1972-07-18 Dow Chemical Co Crosslinking of ethylene polymers without a crosslinking agent

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2056681A5 (en) * 1969-08-09 1971-05-14 Basf Ag
FR2230665A1 (en) * 1973-05-21 1974-12-20 Dart Ind Inc
US3996310A (en) * 1974-08-29 1976-12-07 Exxon Research And Engineering Company Polymers containing non-extractable/non-volatile additives and processes for their preparation
US4639495A (en) * 1981-12-21 1987-01-27 E. I. Du Pont De Nemours And Company Extruding process for preparing functionalized polyolefin polymers
US5079283A (en) * 1990-03-26 1992-01-07 Ferro Corporation Free-radical modified fire-retardant polypropylenes
US6060584A (en) * 1998-05-13 2000-05-09 Eastman Chemical Company Process for the degradation of polyolefins
US6433133B1 (en) 1999-11-16 2002-08-13 Eastman Chemical Company Process for reducing the weight average molecular weight and melt index ratio of polyethylenes and polyethylene products
WO2001092355A2 (en) * 2000-05-30 2001-12-06 Basell Polyolefine Gmbh For producing propylene polymers that are suited for fiber spinning
WO2001092355A3 (en) * 2000-05-30 2002-05-23 Basell Polyolefine Gmbh For producing propylene polymers that are suited for fiber spinning

Also Published As

Publication number Publication date
BE636816A (en) 1900-01-01
FR1373879A (en) 1964-10-02
NL297178A (en) 1900-01-01

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