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Tris(triorganosilyl)phosphites—New ligands controlling catalytic activity of Pt(0) complex in curing of silicone rubber

Paper ID Volume ID Publish Year Pages File Format Full-Text
41861 45902 2010 8 PDF Available
Title
Tris(triorganosilyl)phosphites—New ligands controlling catalytic activity of Pt(0) complex in curing of silicone rubber
Abstract

Applying novel and efficient method, new tris(triorganosilyl)phosphites were synthesized and further used for the preparation of new well-defined platinum complexes [Pt(DVTMDS){P(OSiR3)3}] (DVTMDS = (H2CCHSiMe2)2O, R3 = Si7O9(iOct)7, iPr3, MePh2, Ph3, (OtBu)3, (OSiMe3)3) which were well characterized by spectroscopic methods. Structures of two platinum(0) complexes, [Pt{η4-(H2CCHSiMe2)2O}{P(OSiPh3)3}] (10) and [Pt{η4-(H2CCHSiMe2)2O}{P(OSi(OtBu3)3}] (11) were determined by X-ray analysis. The new complexes proved to be very effective catalysts of a cross-linking of silicones via hydrosilylation at elevated temperature with relatively short cure time and the enthalpy of network formation similar to that of Pt-Karstedt's/DAM (DAM = diallyl maleate) catalytic system. Additionally, the catalyzed silicone formulation had sufficiently long pot-life at room temperature.

Graphical abstractNew tris(triorganosilyl)phosphites synthesized by an efficient method were utilized for the preparation of new platinum complexes [Pt(η4-(H2CCHSiMe2)2O){P(OSiR3)3}]. The structures of two of them were determined by X-ray analysis. These new complexes proved to be very effective catalysts of silicones curing via hydrosilylation at elevated temperature. Moreover, the catalyzed silicone mixture had sufficiently long pot-life at room temperature.Figure optionsDownload full-size imageDownload high-quality image (55 K)Download as PowerPoint slide

Keywords
Hydrosilylation; Karstedt's catalyst; Platinum complexes; Silylphosphites; Curing; Silicones
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Tris(triorganosilyl)phosphites—New ligands controlling catalytic activity of Pt(0) complex in curing of silicone rubber
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 380, Issues 1–2, 31 May 2010, Pages 105–112
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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