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GB1011483A - Process for the manufacture of foamed products from granular thermoplastic plastic, in particular granular polystyrene, containing blowing agent - Google Patents

Process for the manufacture of foamed products from granular thermoplastic plastic, in particular granular polystyrene, containing blowing agent

Info

Publication number
GB1011483A
GB1011483A GB39514/61A GB3951461A GB1011483A GB 1011483 A GB1011483 A GB 1011483A GB 39514/61 A GB39514/61 A GB 39514/61A GB 3951461 A GB3951461 A GB 3951461A GB 1011483 A GB1011483 A GB 1011483A
Authority
GB
United Kingdom
Prior art keywords
granular
blowing agent
coating
prefoaming
polyvinyl 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
GB39514/61A
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.)
ISOCOLOR GmbH
Original Assignee
ISOCOLOR 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 ISOCOLOR GmbH filed Critical ISOCOLOR GmbH
Publication of GB1011483A publication Critical patent/GB1011483A/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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C08J9/236—Forming foamed products using binding agents
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/224—Surface treatment
    • 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
    • C08J2325/00—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 an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A process for the manufacture of foamed products from granular thermoplastic plastic containing blowing agent, especially granular polystyrene, which is prefoamed by supplying heat and, after storage, is bonded in moulds by supplying heat once more, is characterized in that granular plastic is employed which is provided prior to the prefoaming operation with a coating impermeable to the blowing agent at the temperatures occurring during conveyance or storage of the granular material. The material used for coating may be one which is burst or rendered permeable in the prefoaming or may alternatively be such that diffusion of the foaming agent is also prevented during the prefoaming. A coating which becomes adhesive at the temperature used in the moulding (to act as a bonding layer between the particles), or is decomposed by moisture, or is hardened by the application of heat can also be used. In the examples the granules used are of polystyrene containing dichlorodifluoromethane as blowing agent and coated with (1) polyvinyl acetate and hardener; (2) and (3) polyvinyl acetate in various amounts; (4) methyl cellulose and carboxymethyl cellulose. Alginate and gum arabic are also mentioned as coating materials.ALSO:A granular thermoplastic synthetic polymer containing a blowing p agent, for use in the manufacture of foamed products, is provided (prior to prefoaming) with a coating impermeable to the blowing agent at the temperatures occurring during storage or conveyance of the granular material. The coating material may be one which is burst or rendered permeable in the prefoaming. It may also become adhesive at the temperature used in the moulding or be decomposed by moisture, or be hardened by the application of heat. In the examples the granules are of polystyrene containing dichlorodifluoromethane as the blowing agent and coated with (1) polyvinyl acetate and hardener; (2) and (3) polyvinyl acetate in various amounts; (4) methyl cellulose and carboxymethyl cellulose. Alginate and gum arabic are also mentioned as coating materials.
GB39514/61A 1960-11-08 1961-11-03 Process for the manufacture of foamed products from granular thermoplastic plastic, in particular granular polystyrene, containing blowing agent Expired GB1011483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1248060 1960-11-08

Publications (1)

Publication Number Publication Date
GB1011483A true GB1011483A (en) 1965-12-01

Family

ID=66428444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39514/61A Expired GB1011483A (en) 1960-11-08 1961-11-03 Process for the manufacture of foamed products from granular thermoplastic plastic, in particular granular polystyrene, containing blowing agent

Country Status (3)

Country Link
DE (1) DE1237298B (en)
FR (1) FR1304868A (en)
GB (1) GB1011483A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1000856B (en) * 1973-12-14 1976-04-10 Cattaneo M PROCEDURE AND MEANS FOR THE INVOLU CRATION OF BALLS OF EXPANDED POLYSTYRENE SUITABLE FOR THE PRODUCTION OF LIGHTENED CEMENT MUFFLES, NOT THAT FORMULATION THAT CAN BE USED WITH THE PROCEDURE

Also Published As

Publication number Publication date
DE1237298B (en) 1967-03-23
FR1304868A (en) 1962-09-28

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