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GB1005901A - Process for making a foamable polymeric composition in pellet form - Google Patents

Process for making a foamable polymeric composition in pellet form

Info

Publication number
GB1005901A
GB1005901A GB3454162A GB3454162A GB1005901A GB 1005901 A GB1005901 A GB 1005901A GB 3454162 A GB3454162 A GB 3454162A GB 3454162 A GB3454162 A GB 3454162A GB 1005901 A GB1005901 A GB 1005901A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
vinyl
ethyl
ether
methyl
acetate
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
GB3454162A
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.)
Sun Chemical Corp
Original Assignee
Sun Chemical 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling, foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/36Feeding the material to be shaped
    • B29C44/46Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/20Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling, foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/36Feeding the material to be shaped
    • B29C44/46Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion, by spraying
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/16Making expandable particles

Abstract

Foamable thermoplastic polymeric strands S are extruded and chilled whilst passing through grooves in endless surfaces, e.g. rollers or belts and are then cut into pellets. In an example, the material may be polystyrene with 4% by weight of pentane. The material may also be cellulose ethers and esters, e.g. ethyl cellulose, and cellulose acetate or homopolymers and interpolymers of monomers having the CH2=C grouping such as olefins, e.g. ethylene, isobutylene, vinyl halides, e.g. vinyl chloride, vinylidene chloride; vinyl esters of carboxylic acids, e.g. vinyl acetate, butyrate, stearate, bensoate; vinyl ethers, e.g. vinyl methyl ether, ethyl ether or isobutyl ether, unsaturated carboxylic acids and derivatives thereof, e.g. acrylic acid, methacrylic acid, methylacrylate, ethyl acrylate, methyl methacrylate, acrylamide, acrylonitrile, methacrylonitrile and interpolymers of the vinylidene monomers with polycarboxylic acids or derivatives thereof, e.g. maleic anhydride, diethyl maleate, dibutyl fumerate or diallyl or dipropyl maleate, styrene, o-, p-, 25-dichloro or 2,4-dichlorostyrene, p-methyl- or p-ethyl-styrene, vinyl napthalene, alpha-methylstyrene, and blends of styrene with natural or butadiene-acrylonitrile rubbers. The foaming agent may be pentane, hexane, heptane, petroleum ether, cyclopentane, cyclopentadiene, acetone, methanol, methyl acetate, ethyl acetate, methyl formate, ethyl formate, dichloroethylene, isopropyl chloride, propionaldehyde and diisopropyl ether. The focusing agent may be used in an amount from 2 1/2 to 10% by weight.
GB3454162A 1962-07-19 1962-09-10 Process for making a foamable polymeric composition in pellet form Expired GB1005901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3250834A US3250834A (en) 1962-07-19 1962-07-19 Method for making foamable polystrene pellets

Publications (1)

Publication Number Publication Date
GB1005901A true true GB1005901A (en) 1965-09-29

Family

ID=22784808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3454162A Expired GB1005901A (en) 1962-07-19 1962-09-10 Process for making a foamable polymeric composition in pellet form

Country Status (1)

Country Link
GB (1) GB1005901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820846A1 (en) * 1996-07-24 1998-01-28 FERIOLI FILIPPO S.r.l. Pelletizer for plastics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820846A1 (en) * 1996-07-24 1998-01-28 FERIOLI FILIPPO S.r.l. Pelletizer for plastics

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