GB399870A - Improvements in or relating to rubber-bonded asbestos products and method of making same - Google Patents

Improvements in or relating to rubber-bonded asbestos products and method of making same

Info

Publication number
GB399870A
GB399870A GB10842/32A GB1084232A GB399870A GB 399870 A GB399870 A GB 399870A GB 10842/32 A GB10842/32 A GB 10842/32A GB 1084232 A GB1084232 A GB 1084232A GB 399870 A GB399870 A GB 399870A
Authority
GB
United Kingdom
Prior art keywords
lbs
asbestos
added
rubber
per cent
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
GB10842/32A
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.)
DEWEY AND ALMY Ltd
Original Assignee
DEWEY AND ALMY 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 DEWEY AND ALMY Ltd filed Critical DEWEY AND ALMY Ltd
Publication of GB399870A publication Critical patent/GB399870A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/021Composition of linings ; Methods of manufacturing containing asbestos
    • F16D69/022Composition of linings ; Methods of manufacturing containing asbestos in the form of fibres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00Use of ingredients characterised by shape
    • C08K7/02Fibres or whiskers
    • C08K7/04Fibres or whiskers inorganic
    • C08K7/10Silicon-containing compounds
    • C08K7/12Asbestos

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Colloid Chemistry (AREA)

Abstract

An aqueous dispersion of latex, the particles of which carry an electropositive charge, is added to an asbestos slurry. The rubber particles remain of colloidal dimensions and attach themselves to the asbestos fibres, which remain dispersed. The charge on the rubber particles may be inverted to electropositive by strong mineral acids, when a protective agent, such as h moglobin is also employed, or, preferably, by salts with polyvalent cations and monovalent anions, such as aluminium chloride or thorium nitrate, when no protective agent is necessary. The protective agent or the salt also assist in the dispersion of the asbestos. The rubber dispersion is preferably diluted to about 5 per cent and added rather slowly. The quantity of rubber may correspond to 50 per cent or more of the asbestos, but for most purposes 20-25 per cent is used. Pigments, fillers, including finely divided metals, &c., may also be added, preferably to the asbestos slurry, and, when such additions are adversely affected by acid, the electropositive rubber dispersion is desirably alkaline in reaction. In examples:-(1) 1000 lbs. of asbestos and 10000 lbs. of water are mixed in a beating engine, and then a pigment slurry of 100 lbs. iron oxide, 6 lbs. carbon black, 40 lbs. sulphur, 20 lbs. zinc oxide, 1 lb. phenyl-b -naphthylamine, 2 lbs. diphenyl-guanidine and 200 lbs. water added, and beaten. 600 lbs. of 35 per cent ammonia preserved latex are then diluted with 3600 lbs. water containing 10 lbs. h moglobin and 90 lbs. concentrated hydrochloric acid rapidly added. The resulting electropositive dispersion is added to the asbestos slurry while beating and the mixture may then be moulded, felted, sheeted, etc.; (2) 600 lbs. of 35 per cent ammonia preserved latex is diluted with 3600 lbs. water and a solution of 54 1/4 lbs. aluminium chloride crystals in 500 lbs. water added. The procedure of example (1) is then followed. The material may be used for the production of asbestos paper, board, insulating panels, brake linings, and blocks, gasket and friction material, &c.
GB10842/32A 1931-04-17 1932-04-15 Improvements in or relating to rubber-bonded asbestos products and method of making same Expired GB399870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399870XA 1931-04-17 1931-04-17

Publications (1)

Publication Number Publication Date
GB399870A true GB399870A (en) 1933-10-16

Family

ID=21908455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10842/32A Expired GB399870A (en) 1931-04-17 1932-04-15 Improvements in or relating to rubber-bonded asbestos products and method of making same

Country Status (3)

Country Link
DE (1) DE622320C (en)
FR (1) FR734833A (en)
GB (1) GB399870A (en)

Also Published As

Publication number Publication date
FR734833A (en) 1932-10-28
DE622320C (en) 1935-11-25

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