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GB746558A - Improvements in chemical blowing of natural or synthetic rubber - Google Patents

Improvements in chemical blowing of natural or synthetic rubber

Info

Publication number
GB746558A
GB746558A GB11934/54A GB1193454A GB746558A GB 746558 A GB746558 A GB 746558A GB 11934/54 A GB11934/54 A GB 11934/54A GB 1193454 A GB1193454 A GB 1193454A GB 746558 A GB746558 A GB 746558A
Authority
GB
United Kingdom
Prior art keywords
mixture
synthetic rubber
natural
glycol
gas
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
GB11934/54A
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 GB746558A publication Critical patent/GB746558A/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
    • C08J9/06—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
    • 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
    • C08J9/101—Agents modifying the decomposition temperature
    • 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
    • C08J2321/00—Characterised by the use of unspecified rubbers

Landscapes

  • Chemical & Material Sciences (AREA)
  • General 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

Gas-expanded synthetic rubber is prepared by incorporating in a vulcanizable synthetic rubber mixture, azodicarbonamide and an amount of a glycol or glycerol equal to onetwentieth of the weight of natural or synthetic rubber, and heating the mixture to decompose the aziodicarbonamide to expand the mixture by evolution of gas and to vulcanize the expanded mixture. Specified synthetic rubbers are butadiene-styrene or acrylonitrile copolymers, butyl rubber and neoprene. The glycol may be ethylene, propylene, diethylene, triethylene, or tetramethylene glycol. Synthetic resins such as butadiene-styrene resinous copolymer and coumarone-indene resin may also be present.ALSO:Gas-expanded natural or synthetic rubber is prepared by incorporating in a vulcanizable natural or synthetic rubber mixture, azodicarbonamide and an amount of a glycol or glycerol equal to one twentieth of the weight of natural or synthetic rubber, and heating the mixture to decompose the azodicarbonamide to expand the mixture by evolution of gas and to vulcanize the expanded mixture. The glycol may consist of ethylene, propylene, diethylene, triethylene, or tetramethylene glycol, and the synthetic rubber may be of any known vulcanizable kind.
GB11934/54A 1953-07-08 1954-04-26 Improvements in chemical blowing of natural or synthetic rubber Expired GB746558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US746558XA 1953-07-08 1953-07-08

Publications (1)

Publication Number Publication Date
GB746558A true GB746558A (en) 1956-03-14

Family

ID=22120843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11934/54A Expired GB746558A (en) 1953-07-08 1954-04-26 Improvements in chemical blowing of natural or synthetic rubber

Country Status (2)

Country Link
DE (1) DE1037700B (en)
GB (1) GB746558A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245588B (en) * 1956-08-23 1967-07-27 Us Rubber Co Process for the production of sponge rubber
ES2887944A1 (en) * 2020-06-24 2021-12-29 Avanzare Innovacion Tecnologica S L PROCEDURE FOR THE FOAMING OF POLYMERS THROUGH THE USE OF AZODICARBONAMIDE
US11339264B2 (en) 2017-07-20 2022-05-24 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
US11926722B2 (en) 2017-07-20 2024-03-12 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2921475A1 (en) 2014-03-18 2015-09-23 Lanxess Ltd. Blowing agent
EP3431535A1 (en) 2017-07-20 2019-01-23 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
EP3431534A1 (en) 2017-07-20 2019-01-23 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
EP3431536A1 (en) 2017-07-20 2019-01-23 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
WO2019016358A1 (en) 2017-07-20 2019-01-24 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
EP3431537A1 (en) 2017-07-20 2019-01-23 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
EP3473667A1 (en) 2017-10-17 2019-04-24 Solvay Sa Extrusion process for the preparation of alkali metal bicarbonate formulations using a functionalizing agent with a melting point lower than extrusion temperature
US12116467B2 (en) 2018-10-15 2024-10-15 Solvay Sa Foamable crosslinkable polymer composition containing a functionalized particulate bicarbonate as blowing agent and method for manufacturing a crosslinked foamed polymer therefrom

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245588B (en) * 1956-08-23 1967-07-27 Us Rubber Co Process for the production of sponge rubber
US11339264B2 (en) 2017-07-20 2022-05-24 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
US11926722B2 (en) 2017-07-20 2024-03-12 Solvay Sa Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
ES2887944A1 (en) * 2020-06-24 2021-12-29 Avanzare Innovacion Tecnologica S L PROCEDURE FOR THE FOAMING OF POLYMERS THROUGH THE USE OF AZODICARBONAMIDE

Also Published As

Publication number Publication date
DE1037700B (en) 1958-08-28

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