GB884614A - Improvements in or relating to the preparation of polyethylene dispersions or powders - Google Patents

Improvements in or relating to the preparation of polyethylene dispersions or powders

Info

Publication number
GB884614A
GB884614A GB34970/59A GB3497059A GB884614A GB 884614 A GB884614 A GB 884614A GB 34970/59 A GB34970/59 A GB 34970/59A GB 3497059 A GB3497059 A GB 3497059A GB 884614 A GB884614 A GB 884614A
Authority
GB
United Kingdom
Prior art keywords
polyethylene
solvent
aqueous dispersion
dispersion
solution
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
GB34970/59A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB884614A publication Critical patent/GB884614A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C08J3/14—Powdering or granulating by precipitation from solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
    • C08J3/07—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from polymer solutions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Polyethylene dispersions and powders are made by dissolving the polymer in a hot solvent therefor and thereafter gradually bringing the hot solution into contact with cold water to which a turbulent motion is imparted so as to cause a rapid cooling of the polyethylene solution to a temperature below 104 DEG F., whereby an aqueous dispersion of polymer particles is obtained. From the resulting dispersion the solvent may be gradually evaporated at a temperature lower than 131 DEG F. while undergoing continuous stirring followed, if it is desired to produce a polyethylene powder, by filtration and drying, the particle size of the resulting powder being determined by the rate of stirring during the evaporation step. The solvent for the polyethylene may be an aromatic, aliphatic or cycloaliphatic hydrocarbon or a chlorinated compound, e.g. toluene or trichloroethylene. The water to which the polyethylene solution is added may contain an emulsifying or dispersing agent, e.g. sodium lauryl sulphonate or a polyoxyethylene derivative of a higher diamine. After the evaporation of solvent from the aqueous dispersion, excess emulsifying or dispersing agent may be removed by decantation, whereafter by a slight stirring of the residual mass a stable aqueous dispersion of polyethylene having a concentration in the range of from 15 to 60% by weight is obtained. The stability of the so-obtained dispersion may be increased by adding thereto a solvent for polyethylene having a density greater than 1, e.g. trichloroethylene. The polyethylene produced in powder form may be used for coating metal surfaces by a sintering procedure and may also be applied to fabrics and paper. The polyethylene dispersions may be applied to fabrics and paper. Specifications 515,582, 571,814, 671,968, 718,515 and 721,908 are referred to.
GB34970/59A 1958-10-30 1959-10-15 Improvements in or relating to the preparation of polyethylene dispersions or powders Expired GB884614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT884614X 1958-10-30

Publications (1)

Publication Number Publication Date
GB884614A true GB884614A (en) 1961-12-13

Family

ID=11331169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34970/59A Expired GB884614A (en) 1958-10-30 1959-10-15 Improvements in or relating to the preparation of polyethylene dispersions or powders

Country Status (6)

Country Link
AT (1) AT222353B (en)
BE (1) BE583896A (en)
DE (1) DE1160610B (en)
GB (1) GB884614A (en)
IT (1) IT602169A (en)
NL (1) NL244713A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013162767A1 (en) * 2012-04-27 2013-10-31 E. I. Du Pont De Nemours And Company Polymer particle, aqueous dispersion including the same, and fluororesin coating composition using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989372A (en) * 1960-05-02 1965-04-14 Oliver Wallis Burke Improvements in or relating to aqueous dispersions
US3245934A (en) * 1960-12-19 1966-04-12 Pennsalt Chemicals Corp Production of finely divided polyolefin from preformed polymeric gel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013162767A1 (en) * 2012-04-27 2013-10-31 E. I. Du Pont De Nemours And Company Polymer particle, aqueous dispersion including the same, and fluororesin coating composition using the same
US9353264B2 (en) 2012-04-27 2016-05-31 The Chemours Company Fc, Llc Polymer particle, aqueous dispersion including the same, and fluororesin coating composition using the same

Also Published As

Publication number Publication date
AT222353B (en) 1962-07-25
DE1160610B (en) 1964-01-02
BE583896A (en)
NL244713A (en)
IT602169A (en)

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