Binder composition and use thereof

Patent metadata

Field	Value
Publication number	US-2021040323-A1
Application number	US-201916964535-A
Country	US
Kind code	A1
Filing date	Jan 23, 2019
Priority date	Jan 23, 2018
Publication date	Feb 11, 2021
Grant date	—

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), one or more hydrophilic silica aerogel(s) and mixtures thereof, said amorphous, porous hydrophilic silica and/or said hydrophilic silica aerogel having a BET surface area from 100 m2/g to 1500 m2/g or greater and a thermal conductivity from 0.004 to 0.05 W/mK at 20° C. and atmospheric pressure. The invention also relates to the use of said composition as or in thermally or acoustically insulating materials and to coatings, products and articles made therefrom.

First claim

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), one or more hydrophilic silica aerogel(s) or mixtures thereof, said amorphous, porous hydrophilic silica and/or said hydrophilic silica aerogel having a BET surface area from 100 m 2 /g to 1500 m 2 /g or greater, and a thermal conductivity from 0.004 to 0.05 W/m·K at 20° C. and atmospheric pressure.

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 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.

4 . The composition of claim 3 , 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.

5 . 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).

6 . The composition of claim 5 , wherein the binder 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.

7 . The composition of claim 1 , wherein the binder is a) a solution, wherein the solution optionally contains a surfactant, b) an emulsion, optionally containing a surfactant, or c) a dispersion, optionally containing a surfactant.

8 . The composition of claim 7 , 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.

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

10 . 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.

11 . The composition of claim 10 , 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.

12 . 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.

13 . The composition of claim 1 , 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).

14 . The composition of claim 1 , wherein the amorphous, porous hydrophilic silica and/or the hydrophilic silica aerogel have a density of 0.02 to 0.2 g/cm 3 , a BET surface area in the range of 200 to 1000 m 2 /g, 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 . (canceled)

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

18 . A product obtained from a material comprising or consisting of the composition in accordance with claim 1 .

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

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

21 . (canceled)

22 . (canceled)

Assignees

• Worlee Chemie Gmbh
• Dow Silicones Corp

Inventors

• Adebahr Thorsten
• Müller Joachim
• Pierre David

Classifications

• C08K3/36 Primary

  Silica · CPC title

• C08G77/26

  nitrogen-containing groups · CPC title

• F16L59/00

  Thermal insulation in general · CPC title

• C08G2350/00

  Acoustic or vibration damping material · CPC title

• C08G77/08

  characterised by the catalysts used · CPC title