GB836393A - Improvements in the preparation of compositions of natural rubber - Google Patents

Improvements in the preparation of compositions of natural rubber

Info

Publication number
GB836393A
GB836393A GB1075855A GB1075855A GB836393A GB 836393 A GB836393 A GB 836393A GB 1075855 A GB1075855 A GB 1075855A GB 1075855 A GB1075855 A GB 1075855A GB 836393 A GB836393 A GB 836393A
Authority
GB
United Kingdom
Prior art keywords
coagulant
lignin
rolls
heated
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
GB1075855A
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.)
BRITISH RUBBER PROD RES
Original Assignee
BRITISH RUBBER PROD RES
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 BRITISH RUBBER PROD RES filed Critical BRITISH RUBBER PROD RES
Priority to GB1075855A priority Critical patent/GB836393A/en
Publication of GB836393A publication Critical patent/GB836393A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Coagula in the form of coherent sheets which dry quickly are prepared from aqueous dispersions of natural rubber and reinforcing fillers by controlled temperature heat treatment during coagulation and during machining of the coagula between rolls. The coagulation may be effected by the addition of a heated coagulant, or by adding a coagulant to a heated aqueous latex-filler dispersion, or by heating both coagulant and dispersion before or after admixture. Heat is applied during machining by heating the rolls and/or by spraying the coagulum with a stream of hot water. The filler may consist of lignin, carbon black, cyclized rubber, finely-divided silica, a silicate, clay, or a synthetic resin such as polymethyl methacrylate or polystyrene. In one example, a mixture of latex and a solution of lignin in caustic soda, comprising equal weights of rubber and lignin, is poured continuously into boric acid at 95 DEG to 100 DEG C. and live steam is blown through the mixture during the mixing. The co-precipitate coalesces into a gel-like coagulum, which is washed in hot water and sheeted on heated rolls.
GB1075855A 1955-04-14 1955-04-14 Improvements in the preparation of compositions of natural rubber Expired GB836393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1075855A GB836393A (en) 1955-04-14 1955-04-14 Improvements in the preparation of compositions of natural rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1075855A GB836393A (en) 1955-04-14 1955-04-14 Improvements in the preparation of compositions of natural rubber

Publications (1)

Publication Number Publication Date
GB836393A true GB836393A (en) 1960-06-01

Family

ID=9973718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1075855A Expired GB836393A (en) 1955-04-14 1955-04-14 Improvements in the preparation of compositions of natural rubber

Country Status (1)

Country Link
GB (1) GB836393A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100560609C (en) * 2007-11-20 2009-11-18 广东海洋大学 A kind of method that improves drying efficiency of natural rubber
IT202000032627A1 (en) 2020-12-29 2022-06-29 Pirelli TIRE FOR VEHICLE WHEELS
US11390119B2 (en) 2015-12-23 2022-07-19 Pirelli Tyre S.P.A. Tyre for vehicle wheels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100560609C (en) * 2007-11-20 2009-11-18 广东海洋大学 A kind of method that improves drying efficiency of natural rubber
US11390119B2 (en) 2015-12-23 2022-07-19 Pirelli Tyre S.P.A. Tyre for vehicle wheels
IT202000032627A1 (en) 2020-12-29 2022-06-29 Pirelli TIRE FOR VEHICLE WHEELS

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