GB1088383A - Improvements in copolymer articles - Google Patents

Improvements in copolymer articles

Info

Publication number
GB1088383A
GB1088383A GB18329/65A GB1832965A GB1088383A GB 1088383 A GB1088383 A GB 1088383A GB 18329/65 A GB18329/65 A GB 18329/65A GB 1832965 A GB1832965 A GB 1832965A GB 1088383 A GB1088383 A GB 1088383A
Authority
GB
United Kingdom
Prior art keywords
mixture
film
copolymer
slit
cooled
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
GB18329/65A
Inventor
Anthony Graham Marshall Last
John Penfold
John David Seddon
Alexander Blackhall
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB18329/65A priority Critical patent/GB1088383A/en
Priority to BE680382D priority patent/BE680382A/xx
Priority to CH623566A priority patent/CH469755A/en
Priority to FR59699A priority patent/FR1478080A/en
Priority to DE19661595845 priority patent/DE1595845A1/en
Priority to NL6605797A priority patent/NL6605797A/xx
Priority to LU50994A priority patent/LU50994A1/xx
Priority to ES0326204A priority patent/ES326204A1/en
Priority to GB48487/66A priority patent/GB1140146A/en
Priority to BE705163D priority patent/BE705163A/xx
Priority to LU54719D priority patent/LU54719A1/xx
Priority to FR125614A priority patent/FR93767E/en
Publication of GB1088383A publication Critical patent/GB1088383A/en
Priority to DE19671745005 priority patent/DE1745005A1/en
Priority to NL6714535A priority patent/NL6714535A/xx
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
    • C08J9/14—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 organic
    • C08J9/142—Compounds containing oxygen but no halogen atom
    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding 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 or by spraying
    • B29C44/505—Feeding 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 or by spraying extruding the compound through a flat die
    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding 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 or by spraying
    • B29C44/507—Feeding 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 or by spraying extruding the compound through an annular die
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B29C67/202—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F22/00—Homopolymers and 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 carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
    • C08F22/04—Anhydrides, e.g. cyclic anhydrides
    • 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
    • C08J2335/00—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 carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers

Abstract

A film or board of foamed copolymer is obtained by copolymerizing a mixture of styrene and maleic anhydride while forcing the mixture forward, adding a blowing agent to the initial or polymerizing mixture or to the copolymer formed and extruding through a die. The mixture which is copolymerized may contain at least one other monomer in an amount from 0.1-35% by weight. Examples of the latter are straight chain olefins having 3-36 carbon atoms, e.g. propylene, n-octene and n-octadecene; aliphatic vinyl ethers having 6-18 carbon atoms, e.g. cetyl vinyl ether. Alternatively a "rubbery" polymer or copolymer of low molecular weight may be added in an amount from 0.1-25% by weight, e.g. polyisobutylene, atactic polypropylene, and copolymers from butadiene and styrene, isoprene, methyl methacrylate or acrylonitrile. The copolymerization may be catalysed by a peroxide or hydroperoxide with an accelerator, an azo compound or a soluble redox system. At least part of one of the monomers may be heated with a catalyst until homopolymerization has started and then added to the other components of the mixture. The blowing agent may be a gas, e.g. air, carbon dioxide or nitrogen or a low boiling liquid which is not a solvent for the copolymer e.g. pentane, acetone, ethylene dichloride, methyl ethyl ketone or a fluorohydrocarbon or a solid or mixture of solids which on heating produce a gas, e.g. malonic acid or sodium carbonate/citric acid mixture. A nucleating agent e.g. finely divided metals, may be used with a gaseous blowing agent. Fillers, e.g. mica, may be added in an amount up to 30% of the total weight of the film. The films or boards have at least 20% of their cells open to the surface. An apparatus for carrying out the process consists of a screw extruder into which styrene, nucleating agent, catalyst and filler are fed through one hopper and molten maleic anhydride through another hopper. The polymerization takes place in the second part of the extruder which is cooled. Compressed air is injected into the melt which is extruded through a slit die as a foamed sheet which is carried on a conveyer belt and cooled by jets of air. The cooled sheet is slit into three thinner sheets by knives and the thinner sheets are then compressed between rollers. Alternatively, the melt may be extruded through an annular die of a twin screw extruder. The extrudate passes over a hemispherical mandrel coated with polytetrafluoroethylene, air is supplied to the interior of the tubular film to inflate it and the foamed film is cooled. The foamed, inflated film is collapsed between rollers and slit through its thickness. The slit film is compressed in both cases by subjecting it to a pressure of from 10 p.s.i.-100,000 p.s.i.
GB18329/65A 1965-04-30 1965-04-30 Improvements in copolymer articles Expired GB1088383A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
GB18329/65A GB1088383A (en) 1965-04-30 1965-04-30 Improvements in copolymer articles
BE680382D BE680382A (en) 1965-04-30 1966-04-29
CH623566A CH469755A (en) 1965-04-30 1966-04-29 Method and device for the production of articles from foamed copolymers, device for carrying out the method and foils or plates produced by this method
FR59699A FR1478080A (en) 1965-04-30 1966-04-29 Sheets and panels of foamed copolymers and their manufacturing process
DE19661595845 DE1595845A1 (en) 1965-04-30 1966-04-29 Process for the production of foam sheets
NL6605797A NL6605797A (en) 1965-04-30 1966-04-29
LU50994A LU50994A1 (en) 1965-04-30 1966-04-29
ES0326204A ES326204A1 (en) 1965-04-30 1966-04-30 Procedure for the obtaining of synthetic sheets. (Machine-translation by Google Translate, not legally binding)
GB48487/66A GB1140146A (en) 1965-04-30 1966-10-28 Improvements in foamed copolymer articles
BE705163D BE705163A (en) 1965-04-30 1967-10-16
LU54719D LU54719A1 (en) 1965-04-30 1967-10-23
FR125614A FR93767E (en) 1965-04-30 1967-10-24 Sheets and panels of foamed copolymers and their manufacturing process.
DE19671745005 DE1745005A1 (en) 1965-04-30 1967-10-26 Process for the production of foils or sheets from copolymer foam
NL6714535A NL6714535A (en) 1965-04-30 1967-10-26

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB18329/65A GB1088383A (en) 1965-04-30 1965-04-30 Improvements in copolymer articles
GB228166 1966-01-18

Publications (1)

Publication Number Publication Date
GB1088383A true GB1088383A (en) 1967-10-25

Family

ID=26237417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18329/65A Expired GB1088383A (en) 1965-04-30 1965-04-30 Improvements in copolymer articles

Country Status (8)

Country Link
BE (1) BE680382A (en)
CH (1) CH469755A (en)
DE (1) DE1595845A1 (en)
ES (1) ES326204A1 (en)
FR (1) FR1478080A (en)
GB (1) GB1088383A (en)
LU (1) LU50994A1 (en)
NL (1) NL6605797A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019064121A1 (en) * 2017-09-29 2019-04-04 3M Innovative Properties Company Polymeric foam layer and methods of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019064121A1 (en) * 2017-09-29 2019-04-04 3M Innovative Properties Company Polymeric foam layer and methods of making the same

Also Published As

Publication number Publication date
FR1478080A (en) 1967-04-21
LU50994A1 (en) 1966-06-29
ES326204A1 (en) 1967-07-01
CH469755A (en) 1969-03-15
DE1595845A1 (en) 1970-04-30
NL6605797A (en) 1966-10-31
BE680382A (en) 1966-10-31

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