| 摘要 |
<p>SUBSTITUTED p,p'-METHYLENE-BIS-ANILINES Chain extension or cross-linking agents for polyurethanes or epoxide resins are disclosed, which agents comprise 2,2'-dichloro-6,6'-diethylmethylene-bis-aniline or a mixture thereof with a compound of the formula: < IMG > wherein R1, R2, R3 and R4 are the same or different and each represents a straight-chain or branched alkyl radical having from 2 to 4 C atoms, or R1 and/or R3 is chlorine and the remaining R's have the above-mentioned signifcance. A process for the production of 2,2'-dichloro-6,6'-diethyl-methylene-bis-aniline or a mixture as specified above is also disclosed, in which 2-ethyl-6-chloroaniline is condensed with itself or with an aniline having the formula: < IMG > wherein R5 and R6 are the same or different and each represents straight-chain or branched alkyl having from 2 to 4 C atoms, or R5 can also represent chlorine, in an acidic medium in the presence of formaldehyde or a compound which can form formaldehyde. The compounds in the mixture can be condensation products of two molecules of such aniline derivatives.</p> |
