GB953423A - Process for coagulating latex of natural or synthetic rubber or elastomers - Google Patents

Process for coagulating latex of natural or synthetic rubber or elastomers

Info

Publication number
GB953423A
GB953423A GB4125761A GB4125761A GB953423A GB 953423 A GB953423 A GB 953423A GB 4125761 A GB4125761 A GB 4125761A GB 4125761 A GB4125761 A GB 4125761A GB 953423 A GB953423 A GB 953423A
Authority
GB
United Kingdom
Prior art keywords
latex
natural
acid
suspension
synthetic rubber
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
GB4125761A
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of GB953423A publication Critical patent/GB953423A/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
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
    • C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
    • C08J3/215—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase at least one additive being also premixed with a liquid phase
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C1/00—Treatment of rubber latex
    • C08C1/14—Coagulation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

A latex of natural or synthetic rubber in an aqueous suspension of a silica filler is prepared using a precipitated silica which after precipitation is treated with an acid in a pH range from 2 to 4, the suspension being adjusted to a pH of 4 to 7.5 and mixed with the latex and the mixture coagulated in known manner. The suspension may be prepared by precipitation of an alkali-silicate with an acid or acid salt while a filter cake paste obtained by precipitation and phase separation may be used for the production of the suspension. A natural or synthetic protective colloid e.g. casein or the condensation products of polyoxyethylene and stearic acid may be added in amounts of one to three% to the latex. Mineral acids or acid salts e.g. hydrochloric or sulphuric acid may be used to adjust the pH to 2 to 4 while aqueous alkalies e.g. ammonia may be used for pH 4 to 7.5. The ratio of natural or synthetic rubber to filler may be 100:4 to 100:100. The usual compounding agents may be added and the latex vulcanised.
GB4125761A 1960-11-18 1961-11-17 Process for coagulating latex of natural or synthetic rubber or elastomers Expired GB953423A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED34754A DE1152533B (en) 1960-11-18 1960-11-18 Process for coagulating aqueous dispersions made from natural or synthetic rubber or rubber-chuka-like elastomers in the presence of a silica filler in aqueous suspension

Publications (1)

Publication Number Publication Date
GB953423A true GB953423A (en) 1964-03-25

Family

ID=7042327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4125761A Expired GB953423A (en) 1960-11-18 1961-11-17 Process for coagulating latex of natural or synthetic rubber or elastomers

Country Status (2)

Country Link
DE (1) DE1152533B (en)
GB (1) GB953423A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399166A (en) * 1965-08-16 1968-08-27 Oliver W. Burke Jr. Silica pigment reinforced hydrocarbon rubber compounded stocks and vulcanizates thereof and processes for producing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2372192A1 (en) * 1976-11-29 1978-06-23 Rhone Poulenc Ind PROCESS FOR OBTAINING A SILICA-LATEX MASTER MIXTURE BY COPRECIPITATION AND PRODUCT OBTAINED

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399166A (en) * 1965-08-16 1968-08-27 Oliver W. Burke Jr. Silica pigment reinforced hydrocarbon rubber compounded stocks and vulcanizates thereof and processes for producing the same

Also Published As

Publication number Publication date
DE1152533B (en) 1963-08-08

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