Binder composition and use thereof

Patent metadata

Field	Value
Publication number	US-12129393-B2
Application number	US-201916964530-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	Jan 23, 2018
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

The present invention relates to a composition comprising a binder comprising one or more siloxane polymers, silicone resins, silicone based elastomers, and mixtures thereof, wherein said binder optionally comprises one or more cross-linker components comprising a silane and/or a siloxane containing silicon-bonded hydrolysable groups; and a hydrophilic powder and/or gel selected from one or more amorphous, porous hydrophilic silica (s) having a thermal conductivity at 20° C. and atmospheric pressure of 0.001 to 0.15 W/m·K and a surface area (SBET) of between 200 and 1500 m 2 /g, one or more hydrophilic aerogel (s) and mixtures thereof, wherein the binder is a solution, an emulsion, or a dispersion in water. The invention also relates to the use of the composition as or in thermally or acoustically insulating materials and to coated substrates, products and articles made by using the composition.

First claim

The invention claimed is:

1. A composition comprising:
a binder comprising one or more siloxane polymers, silicone resins, silicone based elastomers, or mixtures thereof, wherein said binder optionally comprises one or more cross-linker components comprising a silane and/or a siloxane containing silicon-bonded hydrolysable groups; and
a hydrophilic powder and/or gel selected from one or more amorphous, porous hydrophilic silica(s) having a thermal conductivity at 20° C. and atmospheric pressure of 0.001 to 0.15 W/m·K and a surface area (S BET ) of between 200 and 1500 m 2 /g, one or more hydrophilic aerogel(s) or mixtures thereof,
wherein the binder is a solution, an emulsion, or a dispersion in water,
wherein the hydrophilic powder and/or gel comprises aggregate and/or agglomerate particles having an average size from 0.5 μm to 3000 μm, as determined by way of laser light scattering (ASTM D4464-15); and
wherein the hydrophilic powder and/or gel comprises a surface having hydrophilic groups.

2. The composition of claim 1 , wherein the hydrophilic amorphous, porous hydrophilic silica is present and has a pore size distribution of from 0.1 to 100 nm.

3. The composition of claim 1 , wherein the hydrophilic aerogel is present and is an inorganic or organic aerogel selected from silica aerogel, magnesia aerogel, titania aerogel, zirconia aerogel, alumina aerogel, chromia aerogel, tin dioxide aerogel, lithium dioxide aerogel, ceria aerogel and vanadium pentoxide aerogel, and mixtures of any two or more thereof, or an aerogel based on organic carbon containing polymers (carbon aerogel).

4. The composition of claim 1 , wherein the binder contains one or more siloxane polymers and/or silicone resins having at least one carbinol group (C—OH) or silanol group (Si—OH) or Si-hydrolysable group or a mixture thereof.

5. The composition of claim 4 , wherein the siloxane polymer and/or silicone resin comprises two or more silanol groups and/or Si-hydrolysable reactive groups, wherein the binder is condensation curable and additionally comprises a cross-linking compound, a condensation cure catalyst and optionally reinforcing filler or non-reinforcing filler.

6. The composition of claim 1 , wherein the binder contains one or more siloxane polymers and/or silicone resins having at least one alkenyl group (Si-alkenyl) and/or silicon bonded hydrogen (Si—H).

7. The composition of claim 6 , wherein the siloxane polymer and/or silicone resin comprises two or more alkenyl groups (Si-alkenyl) and/or silicon bonded hydrogens, wherein the binder is addition curable and additionally comprises a cross-linking compound, a Pt group cure catalyst and optionally reinforcing filler or non-reinforcing filler.

8. The composition of claim 1 , wherein the solution, emulsion or dispersion contains a surfactant.

9. The composition of claim 8 , wherein the solution, dispersion or emulsion contains 15.0 to 90.0% by weight of dissolving/dispersing/emulsifying liquid, based on the total weight of the binder.

10. The composition of claim 1 , wherein the binder comprises a silicone based elastomer.

11. The composition in accordance with claim 1 , wherein the binder further comprises additional inorganic or organic components selected from epoxy resins, amino-group containing components, carboxylic acids, isocyanates, organic amines, organic epoxy resins, organic isocyanates, organic carboxylic acids, organic acetals, organic anhydrides, organic aldehydes, polyolefins, or thermoset and/or thermoplastic components.

12. The composition of claim 11 , wherein the composition is blended with inorganic or organic binder systems selected from waterborne systems, solvent borne systems, solventless systems or emulsion systems, and/or solid state binder systems.

13. The composition of claim 1 , wherein the composition comprises 1.0 to 80.0% by weight of the hydrophilic powder and/or gel and 20.0 to 99.0% by weight of the binder.

14. The composition of claim 1 , wherein the hydrophilic powder and/or gel is an amorphous, porous hydrophilic silica and/or a hydrophilic silica aerogel having a density of 0.02 to 0.2 g/cm 3 , and/or a BET surface area from 100 m 2 /g to 1500 m 2 /g or greater, and/or a thermal conductivity from 0.004 to 0.05 W/m K at atmospheric pressure and/or a pore size distribution of 1 to 75 nm.

15. The composition of claim 1 , further comprising one or more additives selected from thickeners, pigments, additional catalysts, additional reinforcing and/or non-reinforcing filler(s), flame retardants, additional water or solvent, foam stabilizers, and/or any other additional insulating fillers.

16. A coated substrate obtained by the application of a material comprising or consisting of the composition in accordance with claim 1 onto said substrate.

17. A product comprising or consisting of the composition in accordance with claim 1 .

18. An article comprising or consisting of the product in accordance with claim 17 .

19. A substrate surface coated with a material comprising or consisting of the composition in accordance with claim 1 .

Assignees

• Worlee Chemie Gmbh
• Dow Silicones Corp

Inventors

• Adebahr Thorsten
• Müller Joachim
• Pierre David

Classifications

• C08L2312/08

  by silane · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L83/06

  containing silicon bound to oxygen-containing groups (C08L83/12 takes precedence) · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• C08K2201/001

  Conductive additives · CPC title