Aqueous silsesquioxane dispersions having low concentrations of reaction byproducts

Patent metadata

Field	Value
Publication number	US-9347174-B2
Application number	US-201313798363-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Mar 13, 2009
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

Methods of making a composition are disclosed, which comprises: i) forming a dispersion of particles comprising: a) silica, b) a non-volatile cation, and c) water, wherein the non-volatile cation is not ammonium; ii) adding at least one organosilyl coupling agent of formula R 1 —(R 2 —O) 3 —Si where R 1 is selected from the group consisting of a substituted alkyl and unsubstituted alkyl, and R 2 is selected from the group consisting of methyl, ethyl, propyl and butyl, wherein the substituted alkyl of R 1 is not aminoalkyl; iii) reacting the organosilyl coupling agent with the dispersion of particles to form a mixture comprising a silsesquioxane and an alcohol; and iv) removing the alcohol from the mixture by vacuum distillation, wherein final concentration of the alcohol is about 1% by weight or less of the total mixture. Further disclosed are compositions comprising an aqueous dispersion comprising silsesquioxane, a non-volatile cation and an alcohol, and methods of using the composition.

First claim

What is claimed is:

1. A composition consisting essentially of a) an aqueous dispersion consisting essentially of a silsesquioxane, a non-volatile cation and an alcohol, wherein the concentration of alcohol is about 0.5% by weight or less of the total composition and wherein the non-volatile cation is not ammonium, and b) a fluorochemical resin.

2. The composition of claim 1 wherein the concentration of alcohol is bout 1000 ppm by weight or less of the total composition.

3. The composition of claim 1 wherein the concentration of alcohol is about 200 ppm or less of the total composition.

4. A method of treating a carpet comprising applying the composition of any one of claim 1 - 3 to the carpet and drying the carpet.

5. A carpet produced by the method of claim 4 , comprising an alcohol concentration of about 0.1 ppm or less of total carpet weight.

Assignees

• Invista North America Sarl

Inventors

• Rudat Martin August

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C09C1/3081

  Treatment with organo-silicon compounds · CPC title

• D06M23/08

  Processes in which the treating agent is applied in powder or granular form (adhesives for multi-layer textile fabrics D06M17/00) · CPC title

• D06M15/643

  containing silicon in the main chain · CPC title

• Y10T428/23986

  With coating, impregnation, or bond · CPC title