Hydrophilic coatings, articles, coating compositions, and methods

• US 10,208,190 B2
• Filed: 04/16/2015
• Issued: 02/19/2019
• Est. Priority Date: 07/03/2009
• Status: Expired due to Fees

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Jing, Naiyong, Yu, Zhigang, Chen, Xue-hua, Xi, Bangwei, Devasenapathi, Appuswamy, Liu, WeiDe, Tiers, George VanDyke, Riddle, Justin A., Theivanayagam Chairman, Deivaraj, Legatt, Michelle L., Francis, Cecil V.
• Primary Examiner(s): Ali, Shuangyi Abu
• Application Number:
  US14/688,200
• Publication Number:
  US 20150218351A1
• Time in Patent Office: 1,405 Days
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C03C 17/007 containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
• CPC Class Codes: C03C 17/30 with silicon-containing compounds
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C09C 1/3081 Treatment with organo-silicon compounds
• CPC Class Codes: C09D 1/00 Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
• CPC Class Codes: C09D 5/00 Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 5/006 Anti-reflective coatings
• CPC Class Codes: C09D 7/62 modified by treatment with other compounds
• CPC Class Codes: C09K 3/16 Anti-static materials
• CPC Class Codes: C09K 3/18 for application to surfaces to minimize adherence of ice, mist or water thereto rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30; Thawing or antifreeze materials for application to surfaces used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]

Abstract

A coating composition which imparts antifog, antireflective, easy-cleaning, and/or antistatic properties to substrates coated therewith. The coating compositions utilize nanoparticles functionalized with amine groups and/or protected amine groups, and amine-reactive groups.

Claims

1. A kit for modifying a substrate surface, the kit comprising:

at least one container comprising a first composition comprising;

inorganic nanoparticles comprising colloidal silica, colloidal zirconia, colloidal alumina, colloidal ceria, colloidal tin oxide, or colloidal titanium dioxide, the inorganic nanoparticles having functional groups attached to the surface through covalent bonds, wherein the functional groups comprise;

amine groups, protected amine groups, or combinations thereof;

optional hydrophilic groups;

an optional surfactant; and

water;

wherein the first composition comprises 0.1 wt-% to 30 wt-% inorganic nanoparticles; and

at least one container comprising a second composition comprising;

nanoparticles comprising functional groups attached to the surface through covalent bonds, wherein the functional groups comprise;

amine-reactive groups;

optional hydrophilic groups;

an optional surfactant; and

water;

wherein the first and second compositions when combined, applied to a substrate, and dried, provide a hydrophilic coating on the substrate that demonstrates improvement, relative to an uncoated substrate, in at least one characteristic selected from the group consisting of antifogging, antireflective, easy-cleaning, and antistatic characteristics.

2. The kit of claim 1 wherein a portion of the nanoparticles of the first composition comprise silica nanoparticles.

3. The kit of claim 1 wherein the nanoparticles of the first composition have a different average diameter than the nanoparticles of the second composition.

4. The kit of claim 1 wherein the functional groups of the second composition comprise alpha,beta-unsaturated groups.

5. The kit of claim 4 wherein the functional groups of the first composition comprise amine groups and the functional groups of the second composition comprise epoxy groups.

6. The kit of claim 1 wherein at least a portion of the nanoparticles of at least one of the first composition and the second composition comprises nanoparticles bearing covalently bonded hydrophilic groups selected from the group consisting of carboxylate groups, structural units bearing multiple carboxylate groups, sulfate half-ester groups, structural units bearing multiple sulfate half-ester groups, sulfonate groups, structural units bearing multiple sulfonate groups, phosphate mono- and/or diester groups, structural units bearing multiple phosphate mono and/or diester groups, phosphonate groups, structural units bearing multiple phosphonate groups, acids thereof, and combinations thereof.

7. The kit of claim 1 wherein the amine groups are present on a particle surface in the first composition in an amount equivalent to at least 3 mole-% of the total molar functional groups on said surface.

8. The kit of claim 1 wherein the amine-reactive groups are present on a particle surface in the second composition in an amount equivalent to at least 3 mole-% of the total molar functional groups on said surface.

9. The kit of claim 1, wherein a variability in the size of the nanoparticles of the first composition is less than 25% of the mean particle size.