# US 2025/0084256 A1 · Reinforced non-stick coating system

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- Number: US 2025/0084256 A1
- Document ID: US20250084256A1
- Status: Published application
- Kind: A1
- Application number: 18/559,883
- Filed: 2022-05-11
- Published: 2025-03-13
- Earliest claimed: 2021-05-11
- Assignees: PPG Industries Ohio, Inc.
- Applicants: PPG Industries Ohio, Inc.
- Inventors: Matteo Sperindio; Riccardo Piras; Fabio Ravella; Ian Jones; Gianluca Cattinari
- Web page: https://patentgrep.com/patent/US20250084256A1

## CPC

- C09D 5/1693: {as part of a multilayer system}
- C09D 183/04: Polysiloxanes
- C09D 5/1675: {Polyorganosiloxane-containing compositions}
- C09D 7/61: inorganic
- C09D 7/69: {Particle size larger than 1000 nm}
- C09D 171/00: Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain (based on polyacetals C09D159/00; based on epoxy resins C09D163/00; based on polythioether-ethers C09D181/02; based on polyethersulfones C09D181/06); Coating compositions based on derivatives of such polymers
- C09D 179/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C09D 181/02: Polythioethers; Polythioether-ethers
- C09D 183/06: containing silicon bound to oxygen-containing groups (C09D183/12 takes precedence)
- C08K 2003/2227: {of aluminium}
- C08K 2003/2237: {of titanium}
- C08K 2201/005: Additives being defined by their particle size in general
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Coating compositions that may be applied to the surface of a substrate to form a durable non-stick coating. The coating compositions may include a basecoat composition and an overcoat composition for forming a basecoat and an overcoat applied over the basecoat. The basecoat may comprise one of an organic polymer, a sol-gel composition, and a silicon resin. The basecoat composition and resulting basecoat may further include reinforcing particles. The overcoat may comprise a siloxane matrix formed from one of a hydrosilylation reaction, a dehydrogenative coupling, and a polycondensation reaction. The basecoat and overcoat may each be substantially free of fluoropolymer components.

## Claims

### Claim 1

A coated article, comprising:
a substrate having a surface; and
a coating disposed on the surface, comprising:
a basecoat having at least one of:
a Martens hardness of 0.2 GPa or higher, as determined by nano-indentation according to DIN ISO 14577 1-3; and
an elastic modulus of 5 GPa or higher, as determined by DIN ISO 14577 1-3, the basecoat comprising at least one of:
(i) a sol-gel matrix formed from at least one siloxane of formula (I)
RxSi(OR′)4-x (I)
wherein:
R is one or more moieties chosen independently from linear, branched, or cyclic alkyl and aryl;
R′ is methyl, ethyl, propyl or alkyl; and
x is 0, 1, 2, or 3;
(ii) an organic polymer having at least one of:
a melt point of 200° C. or greater as determined by differential scanning calorimetry (DSC);
a glass transition temperature of 90° C. or greater as determined by differential scanning calorimetry (DSC); and
a heat deflection/distortion temperature of 100° C. or greater as determined by ASTM D648; and
(iii) a silicone resin, the basecoat including reinforcing particles having a Knoop hardness of at least 160 kg/m2 as determined by ASTM C1326; and
an overcoat disposed on the basecoat and comprising a siloxane matrix, the overcoat having a Martens hardness less than the Martens hardness of the basecoat.

### Claim 2 (depends on 1)

The coated article of claim 1, wherein the organic polymer comprises at least one of polyphenylene sulfide (PPS), polyethersulfone (PES), polyether ether ketone (PEEK), polyphenylsulfone (PPSU), polyamide-imides (PAI), polyetherimides (PEI), polyimide (PI), and combinations thereof.

### Claim 3 (depends on 1)

The coated article of claim 1, wherein the reinforcing particles have an average particle size (D50) of 5 micrometers to 100 micrometers, as determined by scanning electron microscopy (SEM) analysis.

### Claim 4 (depends on 1)

The coated article of claim 1, wherein the reinforcing particles are present in an amount from 3 wt. % to 10 wt. %, based on a total weight of the basecoat.

### Claim 5 (depends on 1)

The coated article of claim 1, wherein a number of reinforcing particles present in the basecoat is at least 3 per 1 centimeter length of a transverse cross section of the basecoat.

### Claim 6 (depends on 1)

The coated article of claim 1, wherein the overcoat comprises a siloxane matrix with a Martens hardness of less than 0.2 GPa as determined by as determined by nano-indentation according to DIN ISO 14577 1-3.

### Claim 7

(canceled)

### Claim 8

(canceled)

### Claim 9 (depends on 1)

The coated article of claim 1, wherein the siloxane matrix of the overcoat is formed from a hydrosilylation reaction between a vinyl-terminated polydimethylsiloxane and a polydimethylsiloxane including hydride groups, together with a co-binder comprising a vinyl Q resin, and further comprises filler particles having an aspect ratio of length to width of at least 3:1.

### Claim 10 (depends on 1)

The coated article of claim 1, wherein the coating comprises less than 0.1 wt. % of a fluoropolymer, based on a total weight of the coating.

### Claim 11

(canceled)

### Claim 12

A coating system, comprising:
a basecoat composition, comprising at least one of:
(i) at least one siloxane of formula (I)
RxSi(OR′)4-x (I)
wherein:
R is one or more moieties chosen independently from linear, branched, or cyclic alkyl and aryl;
R′ is methyl, ethyl, propyl or alkyl; and
x is 0, 1, 2, or 3; and
(ii) an organic polymer having at least one of
a melt point of 200° C. or greater as determined by differential scanning calorimetry (DSC);
a glass transition temperature of 90° C. or greater as determined by differential scanning calorimetry (DSC); and
a heat deflection/distortion temperature of 100° C. or greater as determined by ASTM D648; and
(iii) a silicone resin; and
reinforcing particles having a Knoop hardness of 160 kg/m2 as determined by ASTM C1326; and an average particle size (D50) of 5 microns to 100 microns, as determined by dynamic light scattering; and
an overcoat composition, comprising at least one organosiloxane, and
at least one catalyst.

### Claim 13 (depends on 12)

The coating system of claim 12, wherein the organic polymer comprises at least one of polyphenylene sulfide (PPS), polyethersulfone (PES), polyether ether ketone (PEEK), polyphenylsulfone (PPSU), polyamide-imides (PAI), polyetherimides (PEI), polyimide (PT), and combinations thereof.

### Claim 14 (depends on 13)

The coating system of claim 13, wherein the reinforcing particles are present in an amount from 3 wt. % to 10 wt. %, based on a total weight of the basecoat composition.

### Claim 15 (depends on 12)

The coating system of claim 12, wherein the reinforcing particles have a Knoop hardness of at least 160 kg/m2 as determined by ASTM C1326.

### Claim 16

(canceled)

### Claim 17 (depends on 12)

The coating system of claim 12, wherein the overcoat
composition comprises a vinyl-terminated polydimethylsiloxane;
a polydimethylsiloxane including hydride groups;
a co-binder comprising a vinyl Q resin; and
filler particles having an aspect ratio of length to width of at least 3:1.

### Claim 18 (depends on 12)

The coating system of claim 12, wherein the catalyst comprises tin, titanium, platinum, palladium, ruthenium, gold, copper, zinc or zirconium.

### Claim 19 (depends on 12)

The coating system of claim 12, wherein the catalyst comprises an organoperoxide.

### Claim 20 (depends on 12)

The coating system of claim 12, wherein the catalyst comprises a protic acid, a Lewis acid, or a base.

### Claim 21 (depends on 12)

The coating system of claim 12, wherein the coating system comprises less than 0.1 wt. % of a fluoropolymer, based on a total weight of the basecoat composition and the overcoat composition.

### Claim 22

(canceled)

### Claim 23

(canceled)

### Claim 24

(canceled)

### Claim 25

A coated article, comprising:
a substrate having a surface; and
a coating disposed on the surface, comprising:
a basecoat having at least one of:
a Martens hardness of 0.2 GPa or higher, as determined by nano-indentation according to DIN ISO 14577 1-3; and
an elastic modulus of 5 GPa or higher, as determined by DIN ISO 14577 1-3; and
the basecoat comprising at least one of a sol-gel matrix, an organic polymer, and a silicone resin, the basecoat including reinforcing particles having a Knoop hardness of at least 160 kg/m2 as determined by ASTM C1326; and
an overcoat disposed on the basecoat and comprising a siloxane matrix, the overcoat having a Martens hardness less than the Martens hardness of the basecoat, and further comprising:
a vinyl-terminated polydimethylsiloxane;
a polydimethylsiloxane including hydride groups;
a co-binder comprising a vinyl Q resin; and
filler particles having an aspect ratio of length to width of at least 3:1.

### Claim 26 (depends on 25)

The coating system of claim 25, wherein the vinyl-terminated polydimethylsiloxane has a viscosity from 1,000 and 50,000 cSt, as determined by determined by ASTM D445-21e1.

### Claim 27 (depends on 25)

The coating system of claim 25, wherein the polydimethylsiloxane including hydride groups has from 30 mol % to 50 mol % hydride groups.

### Claim 28

(canceled)