SUBSTRATES COATED WITH CLEAR POLYUREA FILM-FORMING COMPOSITIONS

• US 20110076485A1
• Filed: 09/29/2009
• Published: 03/31/2011
• Est. Priority Date: 09/29/2009
• Status: Abandoned Application

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Russell, Barry A., Furar, John M., Yakulis, George JR., Votruba-Drzal, Peter L., Millero, Edward R. JR., Senkfor, Howard L., Trindade, Jose C., Bratys, Dan M.
• Application Number:
  US12/569,299
• Publication Number:
  US 20110076485A1
• Time in Patent Office: Days
• US Class Current: 428/336
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/12 using two or more compounds having active hydrogen in the first polymerisation step
• CPC Class Codes: C08G 18/3225 Polyamines
• CPC Class Codes: C08G 18/3821 Carboxylic acids; Esters thereof with monohydroxyl compounds
• CPC Class Codes: C08G 18/4692 containing silicon
• CPC Class Codes: C08G 18/50 having heteroatoms other than oxygen
• CPC Class Codes: C08G 18/5024 containing primary and/or secondary amino groups
• CPC Class Codes: C08G 18/6618 with compounds of group C08G18/3225 or polyamines of C08G18/38
• CPC Class Codes: C08G 18/6685 with compounds of group C08G18/3225 or polyamines of C08G18/38
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: Y10T 428/263 Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31605 Next to free metal

Abstract

The present invention is directed to substrates coated with a transparent or translucent film-forming composition, prepared from a curable, two-package composition comprising a first and second reactive package. The first reactive package contains a polyamine component comprising:

• • i) a polyether functional polyamine;
  • ii) an aspartic ester functional polyamine; and
  • iii) an aliphatic polyamine.

The second reactive package comprises a polyisocyanate, and the curable composition, under ambient conditions, upon mixing of the reactive packages, demonstrates a gel time of at least 2500 seconds.

Claims

1. A coated substrate comprising:

A) a substrate having at least one coatable surface, and

B) a transparent film-forming composition applied to at least one surface of the substrate, wherein the film-forming composition is prepared from a transparent, curable, two-package composition comprising a first and second reactive package, wherein the first reactive package contains a polyamine component comprising;

i) a polyether functional polyamine;

ii) an aspartic ester functional polyamine; and

iii) an aliphatic polyamine, wherein each of the polyamines (i), (ii), and (iii) is different from the others; and

wherein the second reactive package comprises a polyisocyanate;

wherein the curable composition under ambient conditions, upon mixing of the reactive packages, demonstrates a gel time of at least 2500 seconds.

2. The coated substrate according to claim 1, wherein one or both reactive packages further comprise solvent prior to mixing.

3. The coated substrate according to claim 2, wherein upon curing, the film-forming composition demonstrates a haze value of less than 1.5.

4. The coated substrate according to claim 3, wherein the film-forming composition is spray applied to at least one surface of the substrate.

5. The coated substrate according to claim 2, wherein the composition is applied to the substrate to yield a dry film thickness of at least 1 mil (25.4 microns).

6. The coated substrate according to claim 5, wherein the composition is applied to the substrate to yield a dry film thickness of at least 5 mil (127 microns).

7. The coated substrate according to claim 5, wherein the substrate comprises titanium, aluminum, aluminum alloys, copper, cold rolled steel, galvanized steel, electrogalvanized steel, stainless steel, pickled steel, zinc-iron alloy, and combinations thereof, wherein the substrate is optionally prepainted with one or more coating compositions.

8. The coated substrate according to claim 2, wherein the composition is applied to the substrate to yield a dry film thickness of 5 to 125 mil (127 to 3175 microns).

9. The coated substrate according to claim 8, wherein the substrate is a transparent substrate having a haze value less than 5.

10. The coated substrate according to claim 2, wherein the polyamine component comprises a mixture of primary and secondary amines.

11. The coated substrate according to claim 2, wherein the aspartic ester functional polyamine contains cyclic groups.

12. The coated substrate according to claim 2, wherein the polyisocyanate comprises a prepolymer chain-extended with a polyisocyanate selected from isophorone diisocyanate, cyclohexylene diisocyanate, 4,4′

-methylenedicyclohexyl diisocyanate;

tetramethylxylyl diisocyanates, 1,4-tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,7-heptamethylene diisocyanate, 2,2,4- and 2,4,4-trimethylhexamethylene diisocyanate, 1,10-decamethylene diisocyanate, 2-methyl-1,5-pentamethylene diisocyanate, phenylene diisocyanate, toluene diisocyanate, xylene diisocyanate, 1,5-naphthalene diisocyanate, chlorophenylene 2,4-diisocyanate, bitoluene diisocyanate, dianisidine diisocyanate, tolidine diisocyanate, methylenediphenyl diisocyanate, 3,3′

-dimethyl-4,4′

-diphenylmethane diisocyanate, polymeric methylenediphenyl diisocyanate, and mixtures thereof.

13. The coated substrate according to claim 12, wherein the prepolymer comprises a polyether polyol, polyester polyol, and/or a polyether polyamine.

14. The coated substrate according to claim 2, wherein the solvent independently comprises an oxygenated solvent, hydrocarbon solvent, siloxane based solvent and/or halogenated solvent.

15. The coated substrate according to claim 14, wherein the first reactive package contains the solvent.

16. The coated substrate according to claim 2, wherein the polyamine component further comprises an additional resin that is different from the polyamines in components (i), (ii) and (iii), and that may or may not be reactive with the polyisocyanate.

17. The coated substrate according to claim 16, wherein the additional resin comprises a polyether, a polyol, polysiloxane diol, a thiol ether, a polycarbonate and/or a polyester.

18. The coated substrate according to claim 2, wherein the polyamine component further comprises an additional aspartic ester functional diamine that is different from the other polyamines in the polyamine component.

19. The coated substrate according to claim 2 wherein the coated substrate demonstrates a yellow index of less than 3.0 upon subjection to ASTM test method G154 after 1000 hours.

20. The coated substrate according to claim 2 wherein the polyether functional polyamine comprises a polyether functional diamine.

21. The coated substrate according to claim 2 wherein the polyamine component in the first reactive package further comprises additional polyamines different from those already present in components (i), (ii), and (iii).

22. A coated substrate comprising:

A) a substrate having at least one coatable surface, and

B) a translucent film-forming composition applied to at least one surface of the substrate, wherein the film-forming composition is prepared from a curable, two-package composition comprising a first and second reactive package, wherein the first reactive package contains a polyamine component comprising;

i) a polyether functional polyamine;

ii) an aspartic ester functional polyamine; and

iii) an aliphatic polyamine; and

wherein the second reactive package comprises a polyisocyanate;

wherein the curable composition under ambient conditions, upon mixing of the reactive packages, demonstrates a gel time of at least 2500 seconds.