GB377190A - Improved method of preserving rubber and like materials - Google Patents
Improved method of preserving rubber and like materialsInfo
- Publication number
- GB377190A GB377190A GB7797/31A GB779731A GB377190A GB 377190 A GB377190 A GB 377190A GB 7797/31 A GB7797/31 A GB 7797/31A GB 779731 A GB779731 A GB 779731A GB 377190 A GB377190 A GB 377190A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthyl
- mono
- benzidine
- benzidines
- extracted
- 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
Links
Classifications
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
a - or b -mono- or di-naphthylbenzidines are prepared by heating benzidine and a - or b -naphthol in an autoclave at 280-300 DEG C. for 8-10 hours. The reaction product is extracted with caustic soda solution, washed with water, and recrystallized from alcohol and aniline. The mono derivative is extracted from the mixture in boiling xylene, leaving the disubstituted benzidine. Mono- or di-naphthyl-tolidines or -bixylidines may be prepared in a similar manner.ALSO:The ageing of rubber and the like is retarded by incorporation in the mix a di-naphthyl substituted benzidine, tolidine or bi-xylidene. a or b -Di-naphthyl benzidines are prepared by heating benzidine and a or b naphthol in an autoclave at 280-300 DEG C. for 8-10 hours. Mono-and di-naphthyl benzidines are produced. The reaction product is extracted with 5 per cent NaOH, washed with water, and recrystallized from alcohol and aniline. The mono-derivative is extracted from the mixture in boiling xylene, leaving the di-substituted benzidine. The b -compound melts at 236-238 DEG C. The crude mixture containing mono-and di-naphthyl benzidines may be used if desired without further purification. Examples are given showing the effect of the addition to a mix of sym-di-b naphthyl benzidine. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of mononaphthyl benzidines, tolidines, or Bi-xylidines. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US377190XA | 1930-05-29 | 1930-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB377190A true GB377190A (en) | 1932-07-13 |
Family
ID=21895913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7797/31A Expired GB377190A (en) | 1930-05-29 | 1931-03-13 | Improved method of preserving rubber and like materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB377190A (en) |
-
1931
- 1931-03-13 GB GB7797/31A patent/GB377190A/en not_active Expired
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