Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
bis-Nitrile and bis-Dialkylcyanamide Platinum(II) Complexes as Efficient Catalysts for Hydrosilylation Cross-Linking of Siloxane Polymers. / Islamova, R.M.; Dobrynin, M.V.; Ivanov, D.M.; Vlasov, A.V.; Kaganova, E.V.; Grigoryan, G.V.; Kukushkin, V.Yu.
в: Molecules, Том 21, № 3, 03.2016, стр. 311-321.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - bis-Nitrile and bis-Dialkylcyanamide Platinum(II) Complexes as Efficient Catalysts for Hydrosilylation Cross-Linking of Siloxane Polymers
AU - Islamova, R.M.
AU - Dobrynin, M.V.
AU - Ivanov, D.M.
AU - Vlasov, A.V.
AU - Kaganova, E.V.
AU - Grigoryan, G.V.
AU - Kukushkin, V.Yu.
PY - 2016/3
Y1 - 2016/3
N2 - cis- and trans-Isomers of the platinum(II) nitrile complexes [PtCl2(NCR)(2)] (R = NMe2, N(C5H10), Ph, CH2Ph) were examined as catalysts for hydrosilylation cross-linking of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated poly(dimethylsiloxane-co-ethylhydrosiloxane) producing high quality silicone rubbers. Among the tested platinum species the cis-complexes are much more active catalysts than their trans-congeners and for all studied platinum complexes cis-[PtCl2(NCCH2Ph)(2)] exhibits the best catalytic activity (room temperature, c = 1.0 x 10(-4) mol/L, (pot-life) 60 min, (curing) 6 h). Although cis-[PtCl2(NCCH2Ph)(2)] is less active than the widely used Karstedt's catalyst, its application for the cross-linking can be performed not only at room temperature (c = 1.0 x 10(-4) mol/L), but also, more efficiently, at 80 degrees C (c = 1.0 x 10(-4)-1.0 x 10(-5) mol/L) and it prevents adherence of the formed silicone rubbers to equipment. The usage of the cis- and trans-[PtCl2(NCR)(2)] complexes as the hydrosilylation catalysts do not require any inhibitors and, moreover, the complexes and their mixtures with vinyl- and trimethylsilyl terminated polysiloxanes are shelf-stable in air. Tested catalysts do not form colloid platinum particles after the cross-linking.
AB - cis- and trans-Isomers of the platinum(II) nitrile complexes [PtCl2(NCR)(2)] (R = NMe2, N(C5H10), Ph, CH2Ph) were examined as catalysts for hydrosilylation cross-linking of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated poly(dimethylsiloxane-co-ethylhydrosiloxane) producing high quality silicone rubbers. Among the tested platinum species the cis-complexes are much more active catalysts than their trans-congeners and for all studied platinum complexes cis-[PtCl2(NCCH2Ph)(2)] exhibits the best catalytic activity (room temperature, c = 1.0 x 10(-4) mol/L, (pot-life) 60 min, (curing) 6 h). Although cis-[PtCl2(NCCH2Ph)(2)] is less active than the widely used Karstedt's catalyst, its application for the cross-linking can be performed not only at room temperature (c = 1.0 x 10(-4) mol/L), but also, more efficiently, at 80 degrees C (c = 1.0 x 10(-4)-1.0 x 10(-5) mol/L) and it prevents adherence of the formed silicone rubbers to equipment. The usage of the cis- and trans-[PtCl2(NCR)(2)] complexes as the hydrosilylation catalysts do not require any inhibitors and, moreover, the complexes and their mixtures with vinyl- and trimethylsilyl terminated polysiloxanes are shelf-stable in air. Tested catalysts do not form colloid platinum particles after the cross-linking.
KW - platinum nitrile complexes
KW - hydrosilylation
KW - cross-linking
KW - catalysis
KW - silicon rubber
U2 - 10.3390/molecules21030311
DO - 10.3390/molecules21030311
M3 - статья
VL - 21
SP - 311
EP - 321
JO - Molecules
JF - Molecules
SN - 1420-3049
IS - 3
ER -
ID: 7555876