Precursors for forming heterophasic odor-absorbing and anti-fouling polymeric coatings

Patent metadata

Field	Value
Publication number	US-11674044-B2
Application number	US-201916716029-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Dec 16, 2019
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

An aqueous or water-borne precursor liquid for forming an odor-absorbing and anti-fouling heterophasic thermoset polymeric coating is provided. The precursor includes a fluorine-containing polyol precursor having a functionality >about 2 that forms a branched fluorine-containing polymer component defining a first phase in the anti-fouling heterophasic thermoset polymeric coating. The precursor also includes a first precursor that forms a first component including a cyclodextrin present as second phase. The first phase can be a continuous phase and the second phase can be a first discrete phase, or the second phase can be the continuous phase and the first phase can be the first discrete phase. A crosslinking agent, water, and optional acid or base are also present. An emulsifier may also be included. Methods of making an odor-absorbing and anti-fouling heterophasic thermoset polymeric coatings with such precursors are also provided.

First claim

What is claimed is:

1. An aqueous precursor liquid for forming an odor-absorbing and anti-fouling heterophasic thermoset polymeric coating, wherein the aqueous precursor liquid comprises:
a fluorine-containing precursor having a functionality greater than about 2 that forms a fluorine-containing polymer component defining a first phase in the anti-fouling heterophasic thermoset polymeric coating;
a first precursor that forms a first component comprising a cyclodextrin, wherein the first component defines a second phase in the odor-absorbing and anti-fouling heterophasic thermoset polymeric coating;
a crosslinking agent comprising a moiety selected from the group consisting of an amine moiety, a hydroxyl moiety, an isocyanate moiety, and a combination thereof, wherein the crosslinking agent is capable of bonding at least a portion of the fluorine-containing polymer component in the first phase with at least a portion of the first component in the second phase;
water; and
optionally, an acid or a base;
wherein the first phase is a continuous phase and the second phase is a first discrete phase within the continuous phase, wherein the first discrete phase comprises a plurality of first domains each having an average size of greater than or equal to about 100 nm to less than or equal to about 5,000 nm; or
wherein the second phase is the continuous phase and the first phase is the first discrete phase within the continuous phase, wherein the first discrete phase comprises a plurality of first domains each having an average size of greater than or equal to about 100 nm to less than or equal to about 5,000 nm.

2. The aqueous precursor liquid of claim 1 , wherein:
(i) the fluorine-containing polymer component comprises a fluoropolymer selected from the group consisting of a polyvinylidene fluoride copolymer, a polyfluoroacrylate, a polytetrafluoroethylene copolymer, a fluorinated polyol, a perfluorocarbon, a perfluoropolyether, a polyfluorosiloxane, a polyvinylidene fluoride, a polytrifluoroethylene, and a combination thereof; and
(ii) the cyclodextrin is selected from the group consisting of α-cyclodextrin, β-cyclodextrin, hydroxypropyl-β-cyclodextrin, methyl-β-cyclodextrin, and a combination thereof.

3. The aqueous precursor liquid of claim 1 , further comprising a second precursor that forms a second component present:
(i) in the second phase;
(ii) as a third phase comprising a plurality of second domains each having an average size of greater than or equal to about 100 nm to less than or equal to about 5,000 nm defining a second discrete phase within the continuous phase in the odor-absorbing and anti-fouling heterophasic thermoset polymeric coating; or
(iii) a combination thereof.

4. The aqueous precursor liquid of claim 3 , wherein the second component is selected from the group consisting of a hygroscopic polymer, a hydrophobic polymer that is not lipophobic, an ionic hydrophilic precursor, an amphiphilic polymer, and a combination thereof, wherein:
(a) the hygroscopic polymer is selected from the group consisting of poly(acrylic acid), poly(alkene glycol) selected from the group consisting of poly(ethylene glycol), and a combination thereof, poly(2-hydroxyethyl methacrylate), poly(vinyl imidazole), poly(2-methyl-2-oxazoline), poly(2-ethyle-oxazoline), poly(vinylpyrolidone), a modified cellulose polymer selected from the group consisting of carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, and a combination thereof;
(b) the hydrophobic polymer is selected from the group consisting of a polyalkylene glycol selected from the group consisting of poly(propylene glycol), poly(tetramethylene glycol), a polybutadiene, a polycarbonate, a polycaprolactone, a polyacrylic polyol, and a combination thereof;
(c) the ionic hydrophilic precursor comprising a pendant carboxylate group, an amine group, a sulfate group, a phosphate group, and a combination thereof; and
(d) the amphiphilic polymer is selected from the group consisting of poloxamers, a polyethylene-block-poly(ethylene glycol) polymer, poly(ethylene glycol) and poly(propylene oxide) triblock polymer, polyethylene glycol (PEG)-polylactic acid (PLA) diblock polymer, polyethylene glycol (PEG)-poly(lactic-co-glycolic acid) (PLGA) diblock polymer, polyethylene glycol (PEG)-polycaprolactone (PCL) diblock polymer, polyethylene glycol (PEG)-polyethylene (PE) diblock polymer, and polyethylene glycol (PEG)-polystyrene (PS) diblock polymer, and a combination thereof.

5. The aqueous precursor liquid of claim 4 , wherein the aqueous precursor liquid has a cloud point of less than or equal to 80° C.

6. The precursor liquid of claim 1 , wherein the aqueous precursor liquid comprises:
a first mixture comprising the first precursor and the crosslinking agent, wherein the first mixture has a pH of about 2 to about 8; and
a separate second mixture comprising the fluorine-containing precursor, wherein the separate second mixture has a pH of about 2 to about 6.

7. The aqueous precursor liquid of claim 1 , further comprising at least one agent selected from the group consisting of an emulsifier, a catalyst, an anti-oxidant, a hindered amine stabilizer, a particulate filler, a pigment, a dye, a plasticizer, a flame retardant, a flattening agent, an adhesion promotor, an acid, a base, an anti-bacterial agent, an anti-fungal agent, and a combination thereof.

8. A method of treating an article comprising:
(a) applying an aqueous precursor liquid to a surface of the article, wherein the aqueous precursor liquid comprises:
a fluorine-containing precursor having a functionality greater than about 2;
a first precursor;
a crosslinking agent comprising a moiety selected from the group consisting of an amine moiety, a hydroxyl moiety, an isocyanate moiety, and a combination thereof;
water; and
optionally, an acid or a base; and

(b) solidifying the aqueous precursor liquid to form an odor-absorbing and anti-fouling thermoset polymeric coating on the surface of the article, wherein the odor-absorbing and anti-fouling thermoset polymeric coating comprises:
a first phase comprising a fluorine-containing polymer formed from the fluorine-containing precursor; and
a second phase comprising a first component formed from the first precursor, wherein the first component comprises a cyclodextrin and wherein the first component is substantially immiscible with the fluorine-containing polymer;
wherein at least a portion of the fluorine-containing polymer in the first phase and at least a portion of the first component in the second phase are bonded together with a moiety selected from the group consisting of a nitrogen-containing moiety, an oxygen-containing moiety, an isocyanate-containing moiety, and a combination thereof; and
wherein the first phase is a continuous phase and the second phase is a first discrete phase within the continuous phase, wherein the first discrete phase comprises a plurality of first domains each having an average size of greater than or equal to about 100 nm to less than or equal to about 5,000 nm; or
wherein the second phase is the continuous phase and the first phase is the first discrete phase within the continuous phase, wherein the first discrete phase comprises a plurality of first domains each having an average size of greater than or equal to about 100 nm to less than or equal to about 5,000 nm.

9. The method of claim 8 , wherein:
(i) the first phase comprises a fluoropolymer selected from the group consisting of a polyvinylidene fluoride copolymer, a polyfluoroacrylate, a polytetrafluoroethylene copolymer, a perfluoropolyether, a polyfluorosiloxane, a polytrifluoroethylene, and a combination thereof; and
(ii) the cyclodext

Assignees

• Gm Global Tech Operations Llc

Inventors

• Robincheck Janet C
• Gross Adam F
• Albanese Kaitlin

Classifications

• D06N2209/146

  Soilproof, soil repellent · CPC title

• C08L5/16

  Cyclodextrin; Derivatives thereof · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C09D4/06

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00 · CPC title

• C09D7/63

  organic · CPC title