GB1059302A - Production of foamed resins - Google Patents

Production of foamed resins

Info

Publication number
GB1059302A
GB1059302A GB2535/65A GB253565A GB1059302A GB 1059302 A GB1059302 A GB 1059302A GB 2535/65 A GB2535/65 A GB 2535/65A GB 253565 A GB253565 A GB 253565A GB 1059302 A GB1059302 A GB 1059302A
Authority
GB
United Kingdom
Prior art keywords
temperature
range
extrusion
pneumatogen
butane
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
GB2535/65A
Inventor
John Harold Gilbert
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals Ltd
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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB2535/65A priority Critical patent/GB1059302A/en
Priority to FR46477A priority patent/FR1464502A/en
Priority to DE19661629526 priority patent/DE1629526A1/en
Publication of GB1059302A publication Critical patent/GB1059302A/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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5609—Purging of residual gas, e.g. noxious or explosive blowing 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
    • C08J9/36—After-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
    • 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

Landscapes

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

Abstract

A foamed polyolefin resin is produced by treating, under conditions of elevated temperature, the product resulting from the extrusion of a foamable mixture comprising a polyolefin resin and a volatile pneumatogen, with a gas substantially inert to the polyolefin. The preferred polyolefine is high or low pressure polyethylene though other suitable resins are derived from olefines containing not more than four carbon atoms. The volatile pneumatogen is a liquid with an atmospheric boiling point lower than the extrusion temperature, e.g. aliphatic hydrocarbons containing up to four carbon atoms such as ethane, ethylene, propane, n-butane, iso-butane and butadiene. n-Pentane, neopentane and carbon dioxide are also specified. Nucleating agents such as finely divided silica or alumina optionally mixed with zinc stearate or a mixture of sodium bicarbonate and tartaric or citric acid may also be incorporated. The extruded product is obtained by a conventional extrusion process in the temperature range 90-120 DEG C. and is treated immediately or shortly thereafter with a gas at a temperature in the range 50-100 DEG C. preferably either at atmospheric pressure or under a pressure, which is increased and released gradually, in the range 40-100 p.s.i.g. for a period lasting from 5 minutes up to 20 hours. The preferred gases are air, nitrogen or a fluorocarbon such as chlorotrifluoromethane.
GB2535/65A 1965-01-20 1965-01-20 Production of foamed resins Expired GB1059302A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2535/65A GB1059302A (en) 1965-01-20 1965-01-20 Production of foamed resins
FR46477A FR1464502A (en) 1965-01-20 1966-01-19 Manufacturing process of polyolefin resin foams
DE19661629526 DE1629526A1 (en) 1965-01-20 1966-01-19 Manufacture of foamed resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2535/65A GB1059302A (en) 1965-01-20 1965-01-20 Production of foamed resins

Publications (1)

Publication Number Publication Date
GB1059302A true GB1059302A (en) 1967-02-15

Family

ID=9741281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2535/65A Expired GB1059302A (en) 1965-01-20 1965-01-20 Production of foamed resins

Country Status (3)

Country Link
DE (1) DE1629526A1 (en)
FR (1) FR1464502A (en)
GB (1) GB1059302A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639441A1 (en) * 1993-08-17 1995-02-22 MASCHINENFABRIK HENNECKE GmbH Method and apparatus for foam filling housings with CFC-free polyurethane foams

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639441A1 (en) * 1993-08-17 1995-02-22 MASCHINENFABRIK HENNECKE GmbH Method and apparatus for foam filling housings with CFC-free polyurethane foams
US5637277A (en) * 1993-08-17 1997-06-10 Maschinenfabrik Hennecke Gmbh Process and device for producing foam casings with CFC-free polyurethane foams

Also Published As

Publication number Publication date
FR1464502A (en) 1966-12-30
DE1629526A1 (en) 1971-02-04

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