Inorganic binding materials with alkyl-modified silsesquioxane nano particles

Patent metadata

Field	Value
Publication number	US-2023416148-A1
Application number	US-202218251900-A
Country	US
Kind code	A1
Filing date	Feb 11, 2022
Priority date	Mar 3, 2021
Publication date	Dec 28, 2023
Grant date	—

Abstract

A composition contains a mixture of an inorganic binder and alkyl-modified silsesquioxane resin particles, where the alkyl-modified silsesquioxane resin particles are distributed throughout the inorganic binder and have an average particle size in a range of 20 to 200 nanometers as determined by dynamic light scattering.

First claim

1 . A composition comprising a mixture of a gypsum and alkyl-modified silsesquioxane resin particles made in an aqueous mixture of alkyl trimethoxy silane, catalyst, water and a surfactant to form an aqueous dispersion of alkyl-modified silsesquioxarie resin particles, where the alkyl-modified silsesquioxane resin particles are distributed throughout the and have an average particle size in a range of 20 to 200 nanometers as determined by dynamic light scattering.

2 . (canceled)

3 . The composition of claim 1 , wherein the composition is an aqueous dispersion of gypsum particles and the alkyl-modified silsesquioxane resin particles dispersed in an aqueous continuous phase.

4 . The composition of claim 1 , wherein the concentration of alkyl-modified silsesquioxane resin particles is to 1.0 weight-percent alkyl-modified silsesquioxane resin particle solids relative to composition solids weight.

5 . The composition of claim 1 , wherein the alkyl-modified silsesquioxane resin particles contain less than 30 mole-percent of combined Si—OH, Si—OR and Si—H functionality relative to moles of Si atoms as determined by infrared spectroscopy and nuclear magnetic resonance spectroscopy.

6 . The composition of claim 1 , wherein the composition is part of a gypsum board where the composition resides between coversheets.

7 . A method for preparing the composition of claim 1 , the method comprising: (a) providing an aqueous dispersion of gypsum and an aqueous dispersion of alkyl-modified silsesquioxane resin particles have an average particle size in a range of 20 to 200 nanometers as determined by dynamic light scattering where the aqueous dispersion is made in an aqueous mixture of alkyl trimethoxy silane, catalyst, water and a surfactant; and (b) mixing together the aqueous dispersion of gypsum and the aqueous dispersion of alkyl-modified silsesquioxane resin particles to form an aqueous dispersion of gypsum and alkyl-modified silsesquioxane resin particles.

8 . The method of claim 7 , further comprising step (c) after step (b) where step (c) is drying the aqueous dispersion of gypsum and alkyl-modified silsesquioxane resin particles sufficiently to achieve a gypsum continuous matrix with alkyl-modified silsesquioxane resin particles distributed throughout the matrix.

Assignees

• Dow Silicones Corp

Inventors

• Swier Steven
• Lecomte Jean-Paul
• Campeol Frederick

Classifications

• C04B24/42 Primary

  Organo-silicon compounds · CPC title

• C04B11/26

  {strating from chemical gypsum}; starting from phosphogypsum or from waste, e.g. purification products of smoke (C04B11/02 takes precedence; chemical purification of smoke, fumes or exhaust gases B01D53/00 {purification of gypsum C01F11/46}) · CPC title

• C04B28/14

  containing calcium sulfate cements {(gypsum-paper plates E04C)} · CPC title

• C04B2111/0062

  Gypsum-paper board like materials · CPC title

• C04B2111/27

  Water resistance, i.e. waterproof or water-repellent materials · CPC title