GB852940A - Improvements in methods of making gas-expanded elastomeric materials and products - Google Patents

Improvements in methods of making gas-expanded elastomeric materials and products

Info

Publication number
GB852940A
GB852940A GB3362/59A GB336259A GB852940A GB 852940 A GB852940 A GB 852940A GB 3362/59 A GB3362/59 A GB 3362/59A GB 336259 A GB336259 A GB 336259A GB 852940 A GB852940 A GB 852940A
Authority
GB
United Kingdom
Prior art keywords
mixture
copolymer
azodicarbonamide
quinonedioxime
unsaturate
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
GB3362/59A
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.)
Uniroyal Inc
Original Assignee
United States Rubber Co
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 United States Rubber Co filed Critical United States Rubber Co
Publication of GB852940A publication Critical patent/GB852940A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/3484—Stopping the foaming reaction until the material is heated or re-heated
    • 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
    • C08J9/0014—Use of organic additives
    • C08J9/0033—Use of organic additives containing sulfur
    • 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
    • C08J9/06—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 chemical blowing agent
    • C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
    • C08J2201/03—Extrusion of the foamable blend
    • 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
    • C08J2205/00—Foams characterised by their properties
    • C08J2205/04—Foams characterised by their properties characterised by the foam pores
    • C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
    • 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
    • C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C08J2323/22—Copolymers of isobutene; butyl rubber

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A closed-cell expanded elastomeric article is made by compounding a synthetic rubbery copolymer of a C4-6 multi-olefinic unsaturate with a C4-7 iso-olefin, the copolymer containing 0,5-10% of the multi-olefinic unsaturate, with p-quinonedioxime and/or dibenzoyl-p-quinonedioxime, benzothiazyl disulphide, tetrachloro-pbenzoquinone, and/or sulphur, and azodicarbonamide, extruding the resulting mixture at below the decomposition temperature of the azodicarbonamide and below the vulcanizing temperature of the mixture to form a miniature of the desired shape, and thereafter heating the mixture in the open at a sufficient temperature to vulcanize the mixture and decompose the azodicarbonamide. The rubbery copolymer may be a copolymer of isoprene or butadiene with isobutylene or ethyl methyl ethylene, and may be halogenated. In one Example (IV), the copolymer is modified prior to incorporating it in the mixture by milling it with dinitrosobenzene. Other ingredients which may be present in the mixture are:-polyethylene, zinc oxide, stearic acid, wax, petrolatum, oxidised or gelled castor oil, carbon black, titanium dioxide, phthalic anhydride and 4,41-dithiodimorpholine.ALSO:A closed-cell expanded elastomeric article is made by compounding a synthetic rubbery copolymer of a C4-6 multi-olefinic unsaturate with a C4-7 isoolefin, the copolymer containing 0,5-10% of the multiolefinic unsaturate, with p-quinonedioxime and/or dibenzoyl-p-quinonedioxime, benzothiazyl disulphide, tetrachloro-p-benzoquinone and/or sulphur, and azodicarbonamide, extruding the resulting mixture at below the decomposition temperature of the azodicarbonamide and below the vulcanizing temperature of the mixture to form a miniature of the desired shape, and thereafter heating the mixture in the open at a sufficient temperature to vulcanize the mixture and decompose the azodicarbonamide. The rubbery copolymer may be a copolymer of ioprene or butadiene with isobutylene or ethyl methyl ethylene, and may be halogenated. In one Example (IV), the copolymer is modified prior to incorporating it in the mixture by milling it with dinitrosobenzene. Other ingredients which may be present in the mixture are:- polyethylene, zinc oxide, stearic acid, wax, petrolatum, oxidised or gelled castor oil, carbon black, titanium dioxide, phthalic anhydride and 4,41-dithiodimorpholine.
GB3362/59A 1958-04-18 1959-01-30 Improvements in methods of making gas-expanded elastomeric materials and products Expired GB852940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US852940XA 1958-04-18 1958-04-18

Publications (1)

Publication Number Publication Date
GB852940A true GB852940A (en) 1960-11-02

Family

ID=22190657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3362/59A Expired GB852940A (en) 1958-04-18 1959-01-30 Improvements in methods of making gas-expanded elastomeric materials and products

Country Status (1)

Country Link
GB (1) GB852940A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000039201A2 (en) * 1998-12-28 2000-07-06 Kimberly-Clark Worldwide, Inc. Breathable composite elastic material having a cellular elastomeric film layer and method of making same
US6855424B1 (en) 1998-12-28 2005-02-15 Kinberly-Clark Worldwide, Inc. Breathable composite elastic material having a cellular elastomeric film layer and method of making same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000039201A2 (en) * 1998-12-28 2000-07-06 Kimberly-Clark Worldwide, Inc. Breathable composite elastic material having a cellular elastomeric film layer and method of making same
WO2000039201A3 (en) * 1998-12-28 2000-11-09 Kimberly Clark Co Breathable composite elastic material having a cellular elastomeric film layer and method of making same
GB2362883A (en) * 1998-12-28 2001-12-05 Kimberly Clark Co Breathable composite elastic material having a cellular elastomeric film layer and method of making same
GB2362883B (en) * 1998-12-28 2003-07-16 Kimberly Clark Co Breathable composite elastic material having a cellular elastomeric film layer and method of making same
US6855424B1 (en) 1998-12-28 2005-02-15 Kinberly-Clark Worldwide, Inc. Breathable composite elastic material having a cellular elastomeric film layer and method of making same

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