Preblends
US4676922A · kind A · utility
17Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1986 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Apr 4, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2321/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Preblends of sulfur and N-cyclohexyl-2-benzothiazolesulfenamide, optionally with diphenylguanadine, can be stabilized against deterioration by incorporating with these materials at least one additive selected from the group consisting phthalic anhydride, phthalic acid and tetrahydrophthalic anhydride. Vulcanizable rubber compounds containing aged preblends with these additives exhibit reduced scorch as compared to aged preblends without said additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.