GB1108295A - Process for the production of wax-like ethylene polymers and ethylene co-polymers of low molecular weight - Google Patents

Process for the production of wax-like ethylene polymers and ethylene co-polymers of low molecular weight

Info

Publication number
GB1108295A
GB1108295A GB35888/65A GB3588865A GB1108295A GB 1108295 A GB1108295 A GB 1108295A GB 35888/65 A GB35888/65 A GB 35888/65A GB 3588865 A GB3588865 A GB 3588865A GB 1108295 A GB1108295 A GB 1108295A
Authority
GB
United Kingdom
Prior art keywords
ethylene
molecular weight
polymers
decomposition
wax
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
GB35888/65A
Inventor
Manfred Raetzsch
Horst Grundmann
Rolf Kilian
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.)
Leuna Werke GmbH
Original Assignee
Leuna Werke 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 Leuna Werke GmbH filed Critical Leuna Werke GmbH
Publication of GB1108295A publication Critical patent/GB1108295A/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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/802—Heating
    • 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

Abstract

Wax-like ethylene polymers of low molecular weight and predominantly linear are prepared by the thermal decomposition of ethylene polymers of high molecular weight and to some extent ramiform, said decomposition being carried out in an atmosphere free of air and oxidizing agents, the polymer to be decomposed being mixed with a melt of already decomposed ethylene polymer, and the decomposition being then carried out at 300 DEG to 600 DEG C. for 30 seconds to 5 hours. The process may be applied to ethylene homopolymers and copolymers, batchwise or continuously, and radical forming agents and molecular weight regulators may be added before or during the decomposition. The process may be effected in a stirred vessel in the lower part of which may be a coiled flow pipe through which the product may be withdrawn and passed to a granulating device. Examples describe the preparation of waxes from (1, 4 and 6 to 9) polyethylene, (2) an ethylene/vinyl acetate copolymer, (3) polyethylene in the presence of dicumyl peroxide, and (5) an ethylene/carbon monoxide copolymer. The products may be used in polishes and for coating paper.
GB35888/65A 1965-05-11 1965-08-20 Process for the production of wax-like ethylene polymers and ethylene co-polymers of low molecular weight Expired GB1108295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV0028426 1965-05-11

Publications (1)

Publication Number Publication Date
GB1108295A true GB1108295A (en) 1968-04-03

Family

ID=7584128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35888/65A Expired GB1108295A (en) 1965-05-11 1965-08-20 Process for the production of wax-like ethylene polymers and ethylene co-polymers of low molecular weight

Country Status (2)

Country Link
DE (1) DE1645609A1 (en)
GB (1) GB1108295A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136437A (en) * 1983-03-07 1984-09-19 Rinne K T I Kabushiki Kaisha Method and equipment for manufacturing paraffin wax-like substances
EP0687692A1 (en) 1994-06-16 1995-12-20 BP Chemicals Limited Chlonine-containing polymer waste processing

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003768A1 (en) * 1980-02-01 1981-08-06 Ljudmila Konstantinovna Ašichmina METHOD FOR THE CONTINUOUS PRODUCTION OF POLYOLEFIN WAX
DE3642266A1 (en) * 1986-12-11 1987-04-23 Rauer Kurt DEGRADATION OF POLYETHYLENE BY MEANS OF RADICAL IMAGES
DE10022669C2 (en) * 2000-05-10 2002-04-18 Paraffinwerk Webau Gmbh Process for the production of high molecular waxes from polyolefins
DE10037230A1 (en) * 2000-07-31 2002-03-28 Paraffinwerk Webau Gmbh Production of high-melting waxes, useful as asphalt and bitumen additives, involves cracking molten polyolefins in absence of oxygen
DE10037225A1 (en) * 2000-07-31 2002-03-28 Paraffinwerk Webau Gmbh Production of high-melting waxes, useful as asphalt and bitumen additives, involves cracking comminuted polyolefins in absence of oxygen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136437A (en) * 1983-03-07 1984-09-19 Rinne K T I Kabushiki Kaisha Method and equipment for manufacturing paraffin wax-like substances
EP0687692A1 (en) 1994-06-16 1995-12-20 BP Chemicals Limited Chlonine-containing polymer waste processing
US5821395A (en) * 1994-06-16 1998-10-13 Bp Chemicals Limited Waste processing

Also Published As

Publication number Publication date
DE1645609A1 (en) 1970-05-21

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