GB368902A - Improvements in and relating to the manufacture of rubber - Google Patents

Improvements in and relating to the manufacture of rubber

Info

Publication number
GB368902A
GB368902A GB85031A GB85031A GB368902A GB 368902 A GB368902 A GB 368902A GB 85031 A GB85031 A GB 85031A GB 85031 A GB85031 A GB 85031A GB 368902 A GB368902 A GB 368902A
Authority
GB
United Kingdom
Prior art keywords
rubber
crumb
minutes
oxidizing
trays
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
GB85031A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB85031A priority Critical patent/GB368902A/en
Priority to NL59743A priority patent/NL33807C/xx
Priority to DEU11581D priority patent/DE573233C/en
Priority to FR729268D priority patent/FR729268A/en
Priority to BE385456A priority patent/BE385456A/en
Publication of GB368902A publication Critical patent/GB368902A/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
    • C08C19/00—Chemical modification of rubber
    • C08C19/08—Depolymerisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C19/00—Chemical modification of rubber
    • C08C19/04—Oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A soft rubber is produced by exposing crude rubber in dry condition and without mechanical working to an oxidizing atmosphere at a sufficiently elevated temperature, e.g. 330-347 DEG F. and for a sufficient time to produce an increase of weight of at least ,5 per cent and preferably of about 2 per cent. Preferably the rubber is first heated under non-oxidizing conditions, e.g. under reduced pressure, and then under oxidizing conditions which are continued while the rubber cools. The rubber is preferably in crumb or sheet form to present an extended surface to the oxidizing gases. In an example, rubber as received from the plantation is reduced to crumb, charged on to trays, and heated in vacuo to 340-345 DEG F. for two hours; air is then admitted and the heating continued for about 45 minutes; the trays are then removed from the oven, piled in such a manner as to allow free circulation of air, and allowed to cool for about 45 minutes to about 120 DEG F.; the crumb is then homogenized by masticating for 3 to 5 minutes. Specification 314,783, [Class 70, Indiarubber &c.], is referred to.
GB85031A 1931-01-09 1931-01-09 Improvements in and relating to the manufacture of rubber Expired GB368902A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB85031A GB368902A (en) 1931-01-09 1931-01-09 Improvements in and relating to the manufacture of rubber
NL59743A NL33807C (en) 1931-01-09 1932-01-04
DEU11581D DE573233C (en) 1931-01-09 1932-01-05 Process for treating raw rubber
FR729268D FR729268A (en) 1931-01-09 1932-01-06 Improvements to rubber manufacturing processes
BE385456A BE385456A (en) 1931-01-09 1932-01-06 Improvements to rubber manufacturing processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB85031A GB368902A (en) 1931-01-09 1931-01-09 Improvements in and relating to the manufacture of rubber

Publications (1)

Publication Number Publication Date
GB368902A true GB368902A (en) 1932-03-17

Family

ID=9711548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB85031A Expired GB368902A (en) 1931-01-09 1931-01-09 Improvements in and relating to the manufacture of rubber

Country Status (5)

Country Link
BE (1) BE385456A (en)
DE (1) DE573233C (en)
FR (1) FR729268A (en)
GB (1) GB368902A (en)
NL (1) NL33807C (en)

Also Published As

Publication number Publication date
DE573233C (en) 1933-03-29
FR729268A (en) 1932-07-21
NL33807C (en) 1934-10-15
BE385456A (en) 1932-02-29

Similar Documents

Publication Publication Date Title
GB368902A (en) Improvements in and relating to the manufacture of rubber
GB832438A (en) Process for producing silicon-iron alloy sheets
GB261748A (en) Manufacture of products resembling rubber
GB345335A (en) Improvements in and relating to vulcanization processes
GB579238A (en) Processing butadiene synthetic rubbers
US1638220A (en) Winl ield scott
GB650178A (en) Improvements in or relating to rubber compositions
GB373098A (en) Improved process of preparing pigments for use in compounding rubber and of vulcanizing rubber containing the same
GB373228A (en) Improvements in the treatment of rubber
GB716024A (en) Reclaiming polymeric siloxane scrap
GB403480A (en) Process for the vulcanisation of caoutchouc
GB357238A (en) Manufacture of adhesive materials from rubber latex
GB825979A (en) Process of preparing polymeric products from abietyl alcohols
GB339303A (en) Improvements in method of correcting for heat loss due to condensation in treating rubber articles
GB431869A (en) Improvements relating to the manufacture of rubber
GB415954A (en) A vulcanizable rubber-containing mixture
GB361971A (en) Improvements in or relating to rubber vulcanization accelerators
GB376318A (en) Improvements in and relating to the manufacture of sheet rubber
GB306390A (en) Improved manufacture of rubber conversion products
GB148349A (en) An improved process for the vulcanisation of rubber
GB843617A (en) Improvements relating to polyethylene compositions and process for their manufacture
GB446403A (en) An improved method of vulcanising tyres and tyres produced thereby
GB734506A (en) Treatment of rubber
GB494630A (en) Improvements in or relating to sponge rubber and methods of manufacturing the same
GB429551A (en) Improvements relating to the manufacture of inflatable articles