Processing stabilizers for rubber compounding
US8101679B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Apr 21, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/375
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention describes an improved method for the preparation of rubber compounds which comprises compounding the rubber and the components at 125-200° C. in the presence of an amount of 0.1-2% based on the weight of the rubber of a processing stabilizer of the formula (I) wherein R1 is hydrogen, C1-C20alkyl, styryl, α-methyl-styryl or —CH2—S—R3; or C1-C20alkyl substituted with C2-C20alkenyl, C3-C20alkinyl, C5-C9cycloalkyl, phenyl or tolyl; R2 is C1-C20alkyl or —CH2—S—R3, R3 is C1-C20alkyl; with phenyl, hydroxyl, cyano, formyl, acetyl or —O—CO—R5 substituted C1-C20alkyl; C2-C20alkenyl, C3-C20alkinyl, C5-C9cycloalkyl; or with hydroxyl, phenyl, 4-chloro-phenyl, 2-methoxycarbonylphenyl, p-tolyl, 1,3-benzthiazol-2-yl, —(CHR5)COOR6 or —(CHR5)nCONR7R8 substituted C5-C9cycloalkyl; R4 is hydrogen or methyl, R5 is hydrogen or C1-C6alkyl, R6 is C1-C20alkyl; with oxygen or sulfur interrupted C3-C20alkyl; C5-C9cycloalkyl, phenyl, benzyl or tolyl, R7 and R8 are independently of each other hydrogen or C1-C6alkyl, and n is 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.