GB783755A - Improvements in and relating to the manufacture of shaped articles - Google Patents

Improvements in and relating to the manufacture of shaped articles

Info

Publication number
GB783755A
GB783755A GB440856A GB440856A GB783755A GB 783755 A GB783755 A GB 783755A GB 440856 A GB440856 A GB 440856A GB 440856 A GB440856 A GB 440856A GB 783755 A GB783755 A GB 783755A
Authority
GB
United Kingdom
Prior art keywords
cross
linking
copolymer
shaped articles
methacrylic acid
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
GB440856A
Inventor
Aleck Macgregor Birks
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.)
DuPont Canada Inc
PPG Architectural Coatings Canada Inc
Original Assignee
DuPont Canada Inc
Canadian 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 DuPont Canada Inc, Canadian Industries Ltd filed Critical DuPont Canada Inc
Priority to GB440856A priority Critical patent/GB783755A/en
Publication of GB783755A publication Critical patent/GB783755A/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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
    • H01J25/30—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone in which the electron stream is perpendicular to the axis of the resonator or resonators and is radial or disc-like before reflection
    • 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
    • C08J2333/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Shaped articles, e.g. domed sheets, are made by heating at a temperature above 100 DEG C. and for a sufficient length of time to effect complete cross-linking a copolymer of methyl methacrylate, glycidyl methacrylate and methacrylic acid, wherein the glycidyl methacrylate and methacrylic acid are each present in an amount sufficient to cause cross-linking upon heat treatment and are together present in an amount not exceeding 20 per cent by weight of the copolymer, and then subjecting the cross-linked copolymer to a moulding operation while it is still hot. Suitable cross-linking temperatures are 100 DEG to 165 DEG C. Specification 681,031 is referred to.
GB440856A 1956-02-13 1956-02-13 Improvements in and relating to the manufacture of shaped articles Expired GB783755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB440856A GB783755A (en) 1956-02-13 1956-02-13 Improvements in and relating to the manufacture of shaped articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB440856A GB783755A (en) 1956-02-13 1956-02-13 Improvements in and relating to the manufacture of shaped articles

Publications (1)

Publication Number Publication Date
GB783755A true GB783755A (en) 1957-09-25

Family

ID=9776643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB440856A Expired GB783755A (en) 1956-02-13 1956-02-13 Improvements in and relating to the manufacture of shaped articles

Country Status (1)

Country Link
GB (1) GB783755A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4962172A (en) * 1986-11-20 1990-10-09 Allied Colloids Ltd. Absorbent products and their manufacture
US5147956A (en) * 1989-05-10 1992-09-15 Allied Colloids Ltd. Absorbent products and their manufacture
US5280079A (en) * 1986-11-20 1994-01-18 Allied Colloids Limited Absorbent products and their manufacture
US6565981B1 (en) 1999-03-30 2003-05-20 Stockhausen Gmbh & Co. Kg Polymers that are cross-linkable to form superabsorbent polymers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4962172A (en) * 1986-11-20 1990-10-09 Allied Colloids Ltd. Absorbent products and their manufacture
US5280079A (en) * 1986-11-20 1994-01-18 Allied Colloids Limited Absorbent products and their manufacture
US5147956A (en) * 1989-05-10 1992-09-15 Allied Colloids Ltd. Absorbent products and their manufacture
US6565981B1 (en) 1999-03-30 2003-05-20 Stockhausen Gmbh & Co. Kg Polymers that are cross-linkable to form superabsorbent polymers

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