# US 2019/0375880 A1 · One component polyurethane dispersion for vinyl windows and other substrates

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- Number: US 2019/0375880 A1
- Document ID: US20190375880A1
- Status: Published application
- Kind: A1
- Application number: 16/549,285
- Filed: 2019-08-23
- Published: 2019-12-12
- Earliest claimed: 2017-08-02
- Assignees: Covestro LLC
- Applicants: Covestro LLC
- Inventors: Makoto Nakao; Tina Kasardo
- Web page: https://patentgrep.com/patent/US20190375880A1

## CPC

- C08G 18/6666: {Compounds of group C08G18/48 or C08G18/52}
- C08F 114/06: Vinyl chloride
- C08G 18/0866: {the dispersing or dispersed phase being an aqueous medium}
- C08G 18/12: using two or more compounds having active hydrogen in the first polymerisation step
- C08G 18/283: {Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds}
- C08G 18/3206: {aliphatic}
- C08G 18/3228: {acyclic}
- C08G 18/3231: {Hydrazine or derivatives thereof}
- C08G 18/348: {Hydroxycarboxylic acids}
- C08G 18/4211: {derived from aromatic dicarboxylic acids and dialcohols}
- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C08G 18/44: Polycarbonates
- C08G 18/48: Polyethers
- C08G 18/4825: {Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/4854: {Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group}
- C08G 18/6505: {the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38}
- C08G 18/6529: {Compounds of group C08G18/3225 or polyamines of C08G18/38}
- C08G 18/6603: {with compounds of group C08G18/32 or polyamines of C08G18/38}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C08G 81/021: {Block or graft polymers containing only sequences of polymers of C08C or C08F}
- C09D 175/06: from polyesters
- C09D 175/08: from polyethers
- G01N 25/4866: {by using a differential method}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- 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)
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

The present invention provides an aqueous polyurethane dispersion (PUD) comprising an amorphous polyester having a glass transition temperature (Tg) as determined by differential scanning calorimetry of less than −30° C.; wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of 0° C. to 20° C. and a hard block content of greater than 50%. Coatings, adhesives, sealants, paints, primers and topcoats, made from the inventive aqueous polyurethane dispersion (PUD) pass detergent resistance testing according to the American Architectural Manufacturers Association's standard, AAMA 615-13, have a pencil hardness according to ASTM D3363 of at least 3H, and are particularly suited for use on low surface energy substrates such as vinyl and other surfaces including floors, windows, doors, window frames, door frames, window shutters, railing, gates, pillars, arbors, pergolas, trellises, gazebos, posts, fencing, pipes and fittings, wire and cable insulation, automobile components, credit cards, and siding.

## Claims

### Claim 1

A coating composition, comprising:
an aqueous polyurethane dispersion (PUD) comprising the reaction product of:
(i) a polyisocyanate,
(ii) a polymeric polyol having a number average molecular weight of 400 to 8,000 g/mol,
(iii) a compound comprising at least one isocyanate-reactive group and an anionic group or potentially anionic group,
(iv) an amorphous polyester having a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of less than −30° C.,
(v) water,
(vi) a mono functional polyalkylene ether,
(vii) a polyol having a molecular weight of less than <400 g/mol, and
(viii) a polyamine or amino alcohol having a molecular weight of 32 to 400 g/mol,
wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of 0° C. to 20° C. and a hard block content of greater than 50%; and
a pigment;
wherein the coating composition has a solids content of at least 30 wt % based on a total weight of the coating composition.

### Claim 2 (depends on 1)

The coating composition of claim 1, wherein PUD solids comprise from about 40 wt % to about 70 wt % of total solids content of the coating composition.

### Claim 3 (depends on 1)

The coating composition of claim 1, wherein the polyisocyanate (i) is selected from the group consisting of 1,6-hexamethylene diisocyanate (HDI), pentamethylene diisocyanate (PDI), isophorone diisocyanate (IPDI), 2,2,4- and 2,4,4-trimethyl-hexamethylene diisocyanate, isomeric bis-(4,4′-isocyanatocyclohexyl)methanes or mixtures thereof of any desired isomer content, 1,4-cyclohexylene diisocyanate, 1,4-phenylene diisocyanate, 2,4- and 2,6-toluene diisocyanate or hydrogenated 2,4- and 2,6-toluene diisocyanate, 1,5-naphthalene diisocyanate, 2,4′- and 4,4′-diphenylmethane diisocyanate, 1,3- and 1,4-bis-(2-isocyanato-prop-2-yl)-benzene (TMXDI), 1,3-bis(isocyanato-methyl)benzene (XDI), and (S)-alkyl 2,6-diisocyanato-hexanoates or (L)-alkyl 2,6-diisocyanatohexanoates.

### Claim 4 (depends on 1)

The coating composition of claim 1, wherein the polymeric polyol has a hydroxyl number of from about 20 to about 400 KOH/g of polymeric polyol.

### Claim 5 (depends on 1)

The coating composition of claim 1, wherein the amorphous polyester has a molecular weight of from about 300 g/mol to about 3000 g/mol.

### Claim 6 (depends on 1)

The coating composition of claim 1, wherein the pigment is present in the coating composition in an amount of from about 5 wt % to about 40 wt % based on a total weight of the coating composition.

### Claim 7 (depends on 1)

The coating composition of claim 1, further comprising a thickener in an amount of from about 0.1 wt % to about 3 wt % based a total weight of the coating composition.

### Claim 8 (depends on 1)

The coating composition of claim 1, further comprising a matting agent in an amount of from about 0.1 wt % to about 3 wt % based a total weight of the coating composition.

### Claim 9 (depends on 1)

The coating composition of claim 1, further comprising a thickener and a matting agent.

### Claim 10 (depends on 9)

The coating composition of claim 9, wherein the matting agent and the thickener are present in the coating composition at a weight ratio of from about 1:2 to about 2:1.

### Claim 11 (depends on 1)

The coating composition of claim 1, further comprising a wetting agent in an amount from about 0.5 wt % to about 3 wt % based on a total weight of the composition.

### Claim 12 (depends on 1)

The coating composition of claim 1, further comprising a leveling agent in an amount of from about 0.1 wt % to about 1 wt % based on a total weight of the composition.

### Claim 13 (depends on 1)

The coating composition of claim 1, wherein the coating composition includes from about 35 wt % to about 70 wt % solids based on a total weight of the coating composition.

### Claim 14 (depends on 1)

The coating composition of claim 1, wherein the coating composition has a pigment to binder ratio of from about 0.7 to about 1.7.

### Claim 15 (depends on 1)

The coating composition of claim 1, wherein the coating composition has a pigment volume concentration of from about 20% to about 40%.

### Claim 16 (depends on 1)

The coating composition of claim 1, wherein the coating composition has a density of from about 5 pounds per gallon (lbs/gal) to about 15 lbs/gal.

### Claim 17 (depends on 1)

A coated substrate, comprising:
a substrate; and
a coating composition according to claim 1 applied to a surface of the substrate to form a surface coating.

### Claim 18 (depends on 17)

The coated substrate of claim 17, wherein a primer composition is applied between the substrate and the coating composition.

### Claim 19 (depends on 17)

The coated substrate of claim 17, wherein the surface coating has a 60° gloss value of less than or equal to 25.

### Claim 20 (depends on 17)

The coated substrate of claim 17, wherein the surface coating has a dirt pick-up resistance (DPUR) value of less than or equal to 10.