Binder composition and use thereof

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/m·K 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.

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 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 component, a condensation cure catalyst and optionally reinforcing filler or non-reinforcing filler. 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         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)