GB849117A - Improvements in or relating to polymeric cellular products - Google Patents

Improvements in or relating to polymeric cellular products

Info

Publication number
GB849117A
GB849117A GB7305/57A GB730557A GB849117A GB 849117 A GB849117 A GB 849117A GB 7305/57 A GB7305/57 A GB 7305/57A GB 730557 A GB730557 A GB 730557A GB 849117 A GB849117 A GB 849117A
Authority
GB
United Kingdom
Prior art keywords
particles
hydrocarbon
density
per cubic
less
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
GB7305/57A
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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
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 Koppers Co Inc filed Critical Koppers Co Inc
Publication of GB849117A publication Critical patent/GB849117A/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
    • 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
    • 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

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

Polystyrene foam having a density of less than one per cubic foot is prepared by contacting polystyrene particles containing 4-15% by weight of an aliphatic hydrocarbon boiling within the range of 25 DEG -100 DEG C. with steam at a pressure of 5-30 p.s.i.g. and a temperature of 109 DEG to 134 DEG C. for 5-30 seconds, volatilising a portion of the hydrocarbon and expanding the particles into discreet particles having a density of less than one pound per cubic foot, and heating the discreet particles to volatilise the remaining hydrocarbon, e.g. in a mould, to form an integral foam. Specified hydrocarbons are petroleum ethers, pentane, hexane, heptane, octane, dimethylpentane, iso-octane, cyclopentane and cyclopentadiene. In the impregnation of the particles with the hydrocarbon, dispersing agents, such as difficulty-soluble phosphates, polyvinyl alcohol and calcium carbonate, may be used. Specifications 690,214, 715,100, 756,654 and 815,386 are referred to.ALSO:Polystyrene foam having a density of less than one pound per cubic foot is prepared by contacting polystyrene particles containing 4-15% by weight of an aliphatic hydrocarbon boiling within the range of 25 DEG -100 DEG C. with steam at a pressure of 5-30 p.s.i.g. and a temperature of 109 DEG to 134 DEG C. for 5-30 seconds, volatilising a portion of the hydrocarbon and expanding the particles into discreet particles having a density of less than one pound per cubic foot, and heating the discreet particles to volatilise the remaining hydrocarbon, e.g. in a mould, to form an integral foam. Specified hydrocarbons are petroleum ethers, pentane, hexane, heptane, octane, dimethylpentane, isooctane, cyclopentane and cyclopentadiene. In the impregnation of the particles with the hydrocarbon, dispersing agents, such as difficulty-soluble phosphates, polyvinyl alcohol and calcium carbonate may be used. Specifications 690,214, 715,100, 756,654 and 815,386 are referred to.
GB7305/57A 1956-03-13 1957-03-05 Improvements in or relating to polymeric cellular products Expired GB849117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US849117XA 1956-03-13 1956-03-13

Publications (1)

Publication Number Publication Date
GB849117A true GB849117A (en) 1960-09-21

Family

ID=22187981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7305/57A Expired GB849117A (en) 1956-03-13 1957-03-05 Improvements in or relating to polymeric cellular products

Country Status (3)

Country Link
BE (1) BE555694A (en)
FR (1) FR1172912A (en)
GB (1) GB849117A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800018A (en) * 1965-04-15 1974-03-26 Saint Gobain Fabrication of cellular resinous products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800018A (en) * 1965-04-15 1974-03-26 Saint Gobain Fabrication of cellular resinous products

Also Published As

Publication number Publication date
BE555694A (en)
FR1172912A (en) 1959-02-17

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