GB987703A - Improvements in or relating to polymers - Google Patents

Improvements in or relating to polymers

Info

Publication number
GB987703A
GB987703A GB732162A GB732162A GB987703A GB 987703 A GB987703 A GB 987703A GB 732162 A GB732162 A GB 732162A GB 732162 A GB732162 A GB 732162A GB 987703 A GB987703 A GB 987703A
Authority
GB
United Kingdom
Prior art keywords
polymer
temperature
portions
thermoplastic
duophase
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
GB732162A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB987703A publication Critical patent/GB987703A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • 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
    • 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
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/203—Solid polymers with solid and/or liquid additives
    • 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)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Friable thermoplastic polymers are made by bringing all portions of a uniphase thermoplastic polymer to a uniform temperature within the range Tf and Tf-20 DEG C., where Tf is the fluxing temperature of the polymer, grinding portions of the polymer upon itself by forcibly moving adjacent portions of the polymer in contact with each other across one another in different directions parallel to their plane of contact for at least 30 seconds to form an isothermal duophase thermoplastic polymer and thereafter lower the temperature of the duophase polymer to less than the temperature indicated by Tf-20 DEG C. to produce clots of friable polymer. By "fluxing temperature" is meant the lowest temperature at which all portions of the polymer are in the fluid state. The term "uniphase polymer" means a thermoplastic polymer which is (1) homogenous, (2) free from interfaces between adjacent portions of the polymer mass and (3) consists of all solid or all fluid polymer. The term "duophase polymer" means a thermoplastic polymer which is (1) heterogeneous, (2) characterized by numerous interfaces between adjacent portions of the polymer mass, and (3) consists of solid and fluid polymer in thermal equilibrium. The grinding action is effected in any mixer that functions with a shearing action, e.g. a Banbury mixer. The polymers treated may contain fillers, plasticizers, pigments, stabilizers, and cross-linking agents. Exemplified polymers are polyethylene, a copolymer of ethylene and butene, a copolymer of vinyl chloride and vinyl acetate, polyvinyl chloride, polystyrene, a poly-(hydroxyether) (Example 21), a poly-(ethylene oxide) (Example 22), polypropylene, a cross-linked copolymer of ethylene and ethyl acrylate, and a polycarbonate homopolymer of 2,2 bis (4-hydroxyphenyl)-propane (Example 32). The friable polymer may subsequently be ground to a powder of particle size 200 to 400 microns.
GB732162A 1961-03-02 1962-02-26 Improvements in or relating to polymers Expired GB987703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9277661A 1961-03-02 1961-03-02

Publications (1)

Publication Number Publication Date
GB987703A true GB987703A (en) 1965-03-31

Family

ID=22235101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB732162A Expired GB987703A (en) 1961-03-02 1962-02-26 Improvements in or relating to polymers

Country Status (2)

Country Link
BE (1) BE614573A (en)
GB (1) GB987703A (en)

Also Published As

Publication number Publication date
BE614573A (en)

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