Skip to main content

Storage Stability of Solvent-Free Condensates of Functionalized Trialkoxysilanes

  • S. Stein (a1), St. Cramer V. Clausbruch (a1), N. Moszner (a1) and V. Rheinberger Ivoclar Ag (a1)

The lack of storage stability of organic-inorganic solvent-free sols is a well-known problem. We investigated the influence of different solvents in the acid catalyzed hydrolysis of various sols on their storage stability. Our experiments were based on two different silanes, 3-methacryloxypropyltrimethoxysilane (MPTS) and 1,1,1-tris(allyloxymethyl)-l-[[[3-(triethoxysilyl)propyl]aminocarbonyl]oxymethyl]methane (silane 31), synthesized by reaction of pentaerythritol triallyl ether and 3-isocyanatopropyltriethoxysilane. The employed solvents were alcohol, tetrahydofuran and tert-butyl methyl ether in a range of 95 wt% to 30 wt% in solution. In order to get comparable chemical conditions the degree of condensation of the various sols were adjusted between 75% and 85%. Furthermore, the sols were modified by silylation with trimethylchlorosilane. A comparison of silylated and not silylated silane 31 clearly showed that a decrease in residual silanol groups increase the storage stability. The results of the investigations demonstrated that both the kind and the amount of solvent used in hydrolysis affects the initial viscosity of solvent-free condensates of silane 31 and MPTS.

Hide All
1. Schmidt, H. K. in Better Ceramic through Chemistry IV, edited by Zelinski, J. J., Brinker, C. J., Clark, D. E. and Ulrich, D. R. (Mater. Res. Soc. Proc. 180, San Francisco, CA, 1990) pp. 961975
2. Kasemann, R., Schmidt, H. in Proc. 1st European Workshop on Hybrid Pragnic-Inorganic Materials, edited by C., Sanchez and F., Ribot (New, J. Chem. 18, Bierville, France, 1993) pp. 1117 ff.
3. Moszner, N., Schöb, W., Rheinberger, V., Polym. Bull. 37, 289 (1996)
4. Wolter, Herbert and Storch, Werner, DE Patent No. 41 33 494 C2 (28. March 1996)
5. Stein, S., Moszner, N., Voelkel, Th. and Rheinberger, V. in Organic/Inorganic Hybrid Materials edited by Laine, R. M., Sanchez, C., Brinker, C. J. and Giannelis, E. (Mater. Res. Soc. Proc. 519, San Francisco, CA, 1998) pp. 357362
6. Schmidt, H., J. Non-Cryst. Solids 73, 681 (1985)
7. Schmidt, H., Wolter, H., J. Non-Cryst. Solids 121, 428 (1990)
8. Delattre, L., Dupuy, C., Banbonneau, F., J. Sol-Gel Sci. Tech. 2, 185 (1994)
9. Prabakar, S., Assink, R. A., Raman, N. K., Myers, S. A., Brinker, C. J., J. Non-Cryst. Solids 202, 53 (1996)
10. Sviderskii, V. A., Voronkov, M. G., Klimenko, V. S., and Klimenko, S. V., Russ. J. Appl. Chem. 69 (6), 842847 (1996); 70 (10), 1615–1619 (1997)
11. Sakka, Sumio and Kozuka, Hiromitsu, Chim. Chron. New Series 23, 137146 (1994)
12. Sadasivan, S., Dubey, A. K., Li, Y. and Rasmussen, D. H. J. Sol-Gel Sci. Tech. 12 (1), 514 (1998)
13. Iler, Ralph K., The Chemistry of Silica, (John Wiley & Sons, New York, 1979), p. 414
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 1 *
Loading metrics...

Abstract views

Total abstract views: 41 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 19th August 2018. This data will be updated every 24 hours.