US 11,987,727 B2
Inorganic filler dispersion, superhydrophobic insulating and wear-resistant coating and preparation method thereof
Yuntao Yang, Tianjin (CN)
Assigned to TIANJIN DALV ELECTRIC POWER TECHNOLOGY CO., LTD., Tianjin (CN)
Filed by TIANJIN DALV ELECTRIC POWER TECHNOLOGY CO., LTD., Tianjin (CN)
Filed on Oct. 3, 2023, as Appl. No. 18/480,180.
Claims priority of application No. 202211269719.6 (CN), filed on Oct. 18, 2022.
Prior Publication US 2024/0124721 A1, Apr. 18, 2024
Int. Cl. C09D 7/62 (2018.01); C09C 1/30 (2006.01); C09C 1/36 (2006.01); C09C 3/12 (2006.01); C09D 5/16 (2006.01); C09D 7/40 (2018.01); C09D 7/45 (2018.01); C09D 183/06 (2006.01); C08K 3/26 (2006.01); C08K 3/30 (2006.01); C08K 3/36 (2006.01); C08K 9/06 (2006.01); C08K 13/06 (2006.01)
CPC C09D 7/62 (2018.01) [C09C 1/3081 (2013.01); C09C 1/309 (2013.01); C09C 1/3684 (2013.01); C09C 3/12 (2013.01); C09D 5/1618 (2013.01); C09D 5/1675 (2013.01); C09D 7/45 (2018.01); C09D 7/67 (2018.01); C09D 7/68 (2018.01); C09D 183/06 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C08K 2003/265 (2013.01); C08K 2003/3045 (2013.01); C08K 3/36 (2013.01); C08K 9/06 (2013.01); C08K 13/06 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); C08K 2201/014 (2013.01)] 6 Claims
 
1. An inorganic filler dispersion, comprising: a micro-nano-meter sized inorganic filler composed of a mixture of a nanometer sized inorganic filler and a submicron-meter sized inorganic filler;
wherein the nanometer sized inorganic filler comprises silica, titanium dioxide, zinc oxide, celite, attapulgite, or combinations thereof, and the nanometer sized inorganic filler has an average volume-based particle size ranging from 5 nanometer (nm) to 50 nm; wherein the submicron-meter sized inorganic filler comprises silica, titanium dioxide, zinc oxide, celite, attapulgite, or combinations thereof, and the submicron-meter sized inorganic filler has an average volume-based particle size ranging from 100 nm to 500 nm;
wherein in the micro-nano-meter sized inorganic filler, a mass percentage of the nanometer sized inorganic filler is 25% to 50%, and a mass percentage of the submicron-meter sized inorganic filler is 50% to 75%;
wherein the inorganic filler dispersion is formed by a primary modification of the micro-nano-meter sized inorganic filler with a hydrophobic silane coupling agent, and a secondary modification of the primary modified micro-nano-meter sized inorganic filler in an organic solvent with a hydrophobic hydroxy-terminated blocking agent;
wherein the hydrophobic silane coupling agent comprises at least one of isooctyltriethoxysilane, butyltriethoxysilane, (3-glycidoxypropyl)trimethoxysilane and 7-methacryloyloxypropyltrimethoxysilane with tridecyloctyltriethoxysilane; the organic solvent is a mixed solvent of a high boiling point solvent and a low boiling point solvent; the boiling point of the high boiling point solvent ranges from 120° C. to 250° C., and the boiling point of the low boiling point solvent ranges from 70° C. to 110° C.; the hydrophobic hydroxy-terminated blocking agent comprises a hydroxy-terminated polydimethylsiloxane, a hydroxy-terminated polybutadiene polyurethane, or a hydroxy-terminated polypropylene glycol;
wherein a mass of the hydrophobic silane coupling agent is 0.5% to 3.0% of a total mass of the micro-nano-meter sized inorganic filler; and
wherein a mass of the hydrophobic hydroxy-terminated blocking agent is 5% to 20% of a total mass of the primary modified micro-nano-meter sized inorganic filler.