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EP0170295A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Precursor for carbon-containing monolithic glasses

Assignee: Dow Silicones Corp
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Filing: 1983-10-10
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Granted: —
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Expires: 2003-10-10
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Abstract

Abstract A valuable intermediate for the preparation of carbon-containing monolithic glasses by solgel process is described which comprises a dispersion of a colloidal metal oxide or a mixture of colloidal metal oxide in a water-alcohol solution of the partial condensate of a silanol having the formula RSi(OH) 3 in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms or the phenyl radical, or mixtures thereof. The composition contains 25 to 60 weight percent solids which themselves comprise 1 to 70 weight percent of colloidal oxide or mixtures thereof and 30 to 99 weight percent of the partial condensate. The metal oxides are selected from a group consisting essentially of (i) ZrO 2 , (ii) Sn0 2 , (iii) ZrSi0 4 , (iv) B 2 0 3 and (v) La 2 0 3 .

Inventors

  • 👤 Ronald Howard Baney
  • 👤 Frank Kang Chi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 00:02
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/006; C03C10/00; C03C10/0009

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 130 words
A composition of matter comprising a dispersion of a colloidal metal oxide, or a mixture of colloidal metal oxides in a water-alcohol solution of the partial condensate of a silanol having the formula Rsi(OH) 3 in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms or the phenyl radical, or mixtures thereof, said composition containing 25 to 60 weight percent solids, said solids comprising 1 to 70 weight percent of colloidal oxide or mixtures thereof and 30 to 99 weight percent of said partial condensate, wherein the metal oxides are selected from a group consisting essentially of (i) Zr0 2 , (ii) SnO 2 , (iii) ZrSiO 4 , (iv) B 2 O 3 and (v) La 2 O 3 .
Claim 2
Dependent Claim 130 words
A composition of matter comprising a dispersion of a colloidal metal oxide, or a mixture of colloidal metal oxides in a water-alcohol solution of the partial condensate of a silanol having the formula Rsi(OH) 3 in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms or the phenyl radical, or mixtures thereof, said composition containing 25 to 60 weight percent solids, said solids comprising 1 to 70 weight percent of colloidal oxide or mixtures thereof and 30 to 99 weight percent of said partial condensate, wherein the metal oxides are selected from a group consisting essentially of (i) Zr0 2 , (ii) SnO 2 , (iii) ZrSiO 4 , (iv) B 2 O 3 and (v) La 2 O 3 .

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