GB661881A - A process for improving the properties of polymers - Google Patents

A process for improving the properties of polymers

Info

Publication number
GB661881A
GB661881A GB18564/48A GB1856448A GB661881A GB 661881 A GB661881 A GB 661881A GB 18564/48 A GB18564/48 A GB 18564/48A GB 1856448 A GB1856448 A GB 1856448A GB 661881 A GB661881 A GB 661881A
Authority
GB
United Kingdom
Prior art keywords
coagulum
powdered
coagulated
polyvinyl chloride
polymers
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
GB18564/48A
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.)
Bataafsche Petroleum Maatschappij NV
Original Assignee
Bataafsche Petroleum Maatschappij NV
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 Bataafsche Petroleum Maatschappij NV filed Critical Bataafsche Petroleum Maatschappij NV
Publication of GB661881A publication Critical patent/GB661881A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J3/12—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
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride

Abstract

Powdered polymers, e.g. polyvinyl chloride, the particles of which have "sintered," i.e. partially softened, surfaces, are made by dispersing in a gaseous medium a surface-dried powder obtained from a coagulated emulsion polymer and heating the dispersion, e.g. by mixing it with a flow of hot gas, vapour or mist. The emulsion polymer may have been coagulated by the addition of organic liquids, freezing or by violent agitation of the suspension, then washed, dried and powdered by dropping the moist polymer upon a solid surface, e.g. the inside of a rotating drum, in an atmosphere of low relative humidity so as to disintegrate lumps. In an example a polyvinyl chloride coagulum was made by emulsifying vinyl chloride in water with sodium cetyl sulphate, polymerizing at 45 DEG C. in the presence of potassium persulphate, coagulating the latex by adding amyl alcohol, separating the coagulum by centrifuging and washing the coagulum with a sodium bicarbonate solution. The powdered polymers may be compounded with plasticizers. Specifications 589,715, and 661,886 are referred to.
GB18564/48A 1947-07-16 1948-07-09 A process for improving the properties of polymers Expired GB661881A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL280485X 1947-07-16
NL180947X 1947-09-18

Publications (1)

Publication Number Publication Date
GB661881A true GB661881A (en) 1951-11-28

Family

ID=26643492

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18564/48A Expired GB661881A (en) 1947-07-16 1948-07-09 A process for improving the properties of polymers

Country Status (5)

Country Link
BE (1) BE483997A (en)
CH (1) CH280485A (en)
FR (1) FR969155A (en)
GB (1) GB661881A (en)
NL (1) NL68137C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831840A (en) * 1953-07-03 1958-04-22 Shell Dev Process for treating polymer coagulates

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026069B (en) * 1954-09-28 1958-03-13 Chemische Werke Huels Aktien G Process for the production of adaptable acrylonitrile polymers
JPS59199722A (en) * 1983-04-27 1984-11-12 ア−ムストロング・ワ−ルド・インダストリ−ス・インコ−ポレ−テツド Improvement of plasticizer absorbability of plastisol type polyvinyl chloride and resin obtained thereby

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831840A (en) * 1953-07-03 1958-04-22 Shell Dev Process for treating polymer coagulates

Also Published As

Publication number Publication date
NL68137C (en)
BE483997A (en)
FR969155A (en) 1950-12-15
CH280485A (en) 1952-01-31

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