GB580743A - Improvements in or relating to the manufacture of expanded thermoplastic materials - Google Patents

Improvements in or relating to the manufacture of expanded thermoplastic materials

Info

Publication number
GB580743A
GB580743A GB1633643A GB1633643A GB580743A GB 580743 A GB580743 A GB 580743A GB 1633643 A GB1633643 A GB 1633643A GB 1633643 A GB1633643 A GB 1633643A GB 580743 A GB580743 A GB 580743A
Authority
GB
United Kingdom
Prior art keywords
gel
paste
heated
diazoaminobenzene
heating
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
GB1633643A
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.)
Expanded Rubber Co Ltd
Original Assignee
Expanded Rubber Co 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 Expanded Rubber Co Ltd filed Critical Expanded Rubber Co Ltd
Priority to GB1633643A priority Critical patent/GB580743A/en
Publication of GB580743A publication Critical patent/GB580743A/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
    • 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
    • C08J2327/00—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 halogen; Derivatives of such polymers
    • C08J2327/02—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 halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—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 at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride

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

Expanded vinyl chloride polymers or copolymers are prepared by forming gas bubbles in a gel formed by heating a paste of said polymer and a plasticiser which has no appreciable solvent or swelling action thereon at normal temperatures, but swells at and forms a gel at elevated temperatures, and heating the said gel sufficiently to enable it to retain its cellular structure. The gas bubbles may be formed by incorporating into the paste before the latter is gelled a blowing-agent such as diazoaminobenzene, sodium nitrite-ammonium chloride mixture, ammonium carbonate and sodium bicarbonate; or by submitting the gel to impregnation by an inert gas (nitrogen or carbon dioxide) under pressure at room temperature. Suitable plasticisers are dibutyl phthalate, dihexyl phthalate and tricresyl phosphate. Fillers, pigments and cross-linking agents such as zinc oxide, may be incorporated into the gel or paste. In examples: (1) a polyvinyl chloride-dibutyl phthalate paste is kneaded with diazoaminobenzene, heated to gel and heated further to liberate the gas; (2) a polyvinyl chloride tricresyl phosphate paste is heated to gel, cooled, gassed and heated further. Specifications 500,298 and 578,513 are referred to.
GB1633643A 1943-10-05 1943-10-05 Improvements in or relating to the manufacture of expanded thermoplastic materials Expired GB580743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1633643A GB580743A (en) 1943-10-05 1943-10-05 Improvements in or relating to the manufacture of expanded thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1633643A GB580743A (en) 1943-10-05 1943-10-05 Improvements in or relating to the manufacture of expanded thermoplastic materials

Publications (1)

Publication Number Publication Date
GB580743A true GB580743A (en) 1946-09-18

Family

ID=10075447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1633643A Expired GB580743A (en) 1943-10-05 1943-10-05 Improvements in or relating to the manufacture of expanded thermoplastic materials

Country Status (1)

Country Link
GB (1) GB580743A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103013B (en) * 1951-12-12 1961-03-23 Lonza Elek Zitaetswerke Process for the production of bodies with closed cells from thermoformable plastic compounds
DE1189267B (en) * 1954-01-07 1965-03-18 Chemetron Corp Process and device for the production of plasticized, molded vinyl ester polymers with a cellular structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103013B (en) * 1951-12-12 1961-03-23 Lonza Elek Zitaetswerke Process for the production of bodies with closed cells from thermoformable plastic compounds
DE1189267B (en) * 1954-01-07 1965-03-18 Chemetron Corp Process and device for the production of plasticized, molded vinyl ester polymers with a cellular structure

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