Isocyanate-functional silanes are prepared in high yield by pyrolysis of an O-carbamate prepared by reaction of a dialkylcarbonate with an aminoalkyl-functional silane in the presence of a basic catalyst, where the catalyst is neutralized by an acid which has a pK
a
of all protolysis stages of not more than 4. The neutralized or partially neutralized catalyst need not be removed prior to pyrolysis. The isocyanato-functional silanes exhibit higher storage stability as compared to those prepared from O-carbamates where catalyst neutralization is effected by weak acids.
Sheludyakov, V. D.; Kirilina, N. I.; Paushkin, Ya. M., Doklady Chemistry, 1980, vol. 254, p. 484 - 488
作者:Sheludyakov, V. D.、Kirilina, N. I.、Paushkin, Ya. M.、Kirilin, A. D.
DOI:——
日期:——
SHELUDYAKOV V. D.; KIRILINA N. I.; PAUSHKIN YA. M.; KIRILIN A. D., DOKL. AN CCCP, 1980, 254, HO 6, 1412-1416
作者:SHELUDYAKOV V. D.、 KIRILINA N. I.、 PAUSHKIN YA. M.、 KIRILIN A. D.
DOI:——
日期:——
SHELUDYAKOV V. D.; KIRILINA N. I.; KUZNETSOVA M. G.; KISIN A. V.; KIRILIN+, ZH. OBSHCH. XIMII, 1981, 51, HO 8, 1824-1829
作者:SHELUDYAKOV V. D.、 KIRILINA N. I.、 KUZNETSOVA M. G.、 KISIN A. V.、 KIRILIN+
DOI:——
日期:——
Aminomethylene functional siloxanes
申请人:Schafer Oliver
公开号:US20060122413A1
公开(公告)日:2006-06-08
Organopolysiloxanes containing pendent silicon-bonded aminomethylene groups may be prepared by reaction of hydroxy-functional siloxanes or polysiloxanes with aminomethylalkoxysilanes. By adjusting the functionalities of the siloxane and silane, branched siloxanes with aminomethylene functionality may be obtained, as may also organopolysiloxanes of high amine number, reflecting numerous chain-pendent aminomethylene groups. The products are easily emulsifyable in water.