Transparent copolyamide from 1,10-disubstituted C.sub.11 diamine
申请人:Ciba-Geigy Corporation
公开号:US04258176A1
公开(公告)日:1981-03-24
There are described transparent copolyamides which are obtained by reaction of a mixture (A) consisting of essentially stoichiometric amounts of a diamine ##STR1## and isophthalic acid or terephthalic acid, or a mixture of isophthalic acid and terephthalic acid, with a mixture (B) consisting of essentially stoichiometric amounts of a diamine ##STR2## and terephthalic acid or a mixture of terephthalic acid and isophthalic acid, or with a mixture (C) consisting of essentially stoichiometric amounts of a diamine ##STR3## and terephthalic acid or isophthalic acid or mixtures thereof, wherein R', R" and R.sub.1 to R.sub.11 have the meanings given in claim 1. The novel copolyamides are distinguished by good thermoplastic processing characteristics, by low water absorption and by good stability to hydrolysis, and are suitable for producing transparent moulded articles.
Substituted 11-amino-undeca-4,8-dienal and 11-amino-undecanal
申请人:Ciba-Geigy Corporation
公开号:US04277621A1
公开(公告)日:1981-07-07
Novel substituted 11-amino-undeca-4,8-dienal and 11-amino-undecanal aldehyde-derivatives of the formulae Ia ##STR1## in which R.sub.1 to R.sub.6, Y and m are as defined in patent claim 1, and processes for their preparation are described. The compounds of the formulae Ia and Ib can be catalytically hydrogenated to novel 1,11-diaminoundecanes, which, in turn, can be used, for example, for the preparation of polycondensation products, in particular transparent polyamides, or as curing agents for epoxide resins.