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1. WO1998037107 - PROCESS FOR MODIFYING THE RHEOLOGY OF POLYOLEFINS

Publication Number WO/1998/037107
Publication Date 27.08.1998
International Application No. PCT/US1998/003361
International Filing Date 20.02.1998
Chapter 2 Demand Filed 14.09.1998
IPC
C08F 8/50 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
50Partial depolymerisation
C08F 110/06 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
110Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
04Monomers containing three or four carbon atoms
06Propene
CPC
B29C 2948/92704
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
2948Indexing scheme relating to extrusion moulding
92Measuring, controlling or regulating
92504Controlled parameter
92704Temperature
B29C 48/022
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
022characterised by the choice of material
B29C 48/395
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
395using screws surrounded by a cooperating barrel, e.g. single screw extruders
B29C 48/92
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
92Measuring, controlling or regulating
C08F 110/06
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
110Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
04Monomers containing three or four carbon atoms
06Propene
C08F 2810/10
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2810Chemical modification of a polymer
10including a reactive processing step which leads, inter alia, to morphological and/or rheological modifications, e.g. visbreaking
Applicants
  • FMC CORPORATION [US]/[US]
Inventors
  • ARABINICK, Nancy, D.
  • BURBA, John, L., III
  • DALTON, William, O.
Agents
  • CALDWELL, John
Priority Data
09/025,82319.02.1998US
60/038,71020.02.1997US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR MODIFYING THE RHEOLOGY OF POLYOLEFINS
(FR) PROCEDE DE MODIFICATION DE LA RHEOLOGIE DE POLYOLEFINES
Abstract
(EN)
The molecular weight of a polyolefin such as polypropylene is reduced, as evidenced by lowered viscosity and increased melt flow rate, by treatment with an inorganic peroxygen selected from metal persulfates, ammonium persulfates, and any mixtures thereof. The treatment avoids or minimizes the color or odor attendant treatment with organic peroxygens and the toxic products of organic persulfate decomposition, and avoids the special handling required with organic peroxides.
(FR)
Pour réduire la masse molaire d'une polyoléfine telle que du polypropylène et obtenir ainsi une viscosité plus faible et une meilleure vitesse de fluage on traite la polyoléfine avec un peroxygène inorganique sélectionné parmi des persulfates de métaux, des persulfates d'ammonium et des mélanges de ces derniers. Ce traitement élimine totalement ou réduit au maximum le traitement corollaire des couleurs ou des odeurs avec des peroxygènes organiques ainsi que les produits toxiques résultant de la décomposition du persulfate organique, et il rend inutile la manipulation spéciale que nécessitent les peroxydes organiques.
Also published as
Latest bibliographic data on file with the International Bureau