Coatings with fast return to service

Patent metadata

Field	Value
Publication number	US-2018362801-A1
Application number	US-201715626267-A
Country	US
Kind code	A1
Filing date	Jun 19, 2017
Priority date	Jun 19, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

The present invention provides a coating composition comprising 1% to 99% of a blend of two or more aspartic ester functional amines, 20% to 70% of an acrylate-containing compound; and 10% to 70% of one or more polyisocyanates, wherein the coating composition is 100% solids and wherein the coating composition has a maximum viscosity of no more than 600 cps at one hour. The ready-to-apply coating produced from this composition has extended working times without exhibiting “zippering” and may find use on countertops and floors.

First claim

What is claimed is:

1 . A coating composition comprising:
1% to 99% of a blend of two or more aspartic ester functional amines; 1% to 99% of an acrylate-containing compound; and 10% to 70% of one or more polyisocyanates, wherein the coating composition is 100% solids and wherein the coating composition has a maximum viscosity of no more than 600 cps at one hour.

2 . The coating composition according to claim 1 further including a photoinitiator.

3 . The coating composition according to claim 2 , wherein the photoinitiator is present in an amount of 0.1% to 5%.

4 . The coating composition according to claim 1 , wherein the acrylate-containing compound has a functionality of 2 or more.

5 . The coating composition according to claim 1 , wherein the acrylate-containing compound has a functionality of 3 or more.

6 . The coating composition according to claim 1 , wherein the coating composition has a maximum viscosity of no more than 100 cps at one hour.

7 . The coating composition according to claim 1 , wherein the acrylate-containing compound is selected from the group consisting of 1,6-hexanediol diacrylate, pentaerythritol (EO) n tetraacrylate, isobornyl acrylate, tripropylene glycol diacrylate and trimethylolpropane triacrylate.

8 . The coating composition according to claim 1 , wherein the acrylate-containing compound is trimethylolpropane triacrylate.

9 . The coating composition according to claim 2 , wherein the photoinitiator is selected from the group consisting of acylphosphine oxide derivatives, α-aminoalkylphenone derivatives, hydroxyalkylphenones, benzophenones, benzil ketals, methylbenzoyl formate and phenylacetophenones.

10 . The coating composition according to claim 2 , wherein the photoinitiator is a 50/50 mixture of bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide and 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

11 . The coating composition according to claim 1 , wherein the polyisocyanate is selected from the group consisting of tetramethylene diisocyanate, hexamethylene diisocyanate, 2,3,3-trimethylhexamethylene diisocyanate, 1,4-cyclohexylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, 4,4′-dicyclohexyl diisocyanate, 1-diisocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (isophorone diisocyanate), 1,4-phenylene diisocyanate, 2,6-tolylene diisocyanate, 2,4-tolylene diisocyanate, 1,5-naphthylene diisocyanate, 2,4- or 4,4′-diphenylmethane diisocyanate, α,α,α′,α′-tetramethyl-m- or p-xylylene diisocyanate, and triphenylmethane 4,4′,4″-triisocyanate and mixtures thereof.

12 . The coating composition according to claim 1 , wherein the polyisocyanate is hexamethylene diisocyanate.

13 . A substrate coated with the composition according to claim 1 .

14 . The substrate according to claim 13 , wherein the substrate is selected from the group consisting of countertops and floors.

15 . The substrate according to claim 13 , wherein the coating composition is cured by exposure to actinic radiation.

16 . A cured coating produced by exposing to actinic radiation a coating composition comprising 1% to 99% of a blend of two or more aspartic ester functional amines, 20% to 70% of an acrylate-containing compound and 20% to 70% of one or more polyisocyanates, wherein the coating composition is 100% solids and wherein the coating composition has a maximum viscosity of no more than 600 cps at one hour.

17 . The cured coating according to claim 16 , wherein the acrylate-containing compound is selected from the group consisting of 1,6 hexanediol diacrylate, pentaerythritol (EO) n tetraacrylate, isobornyl acrylate, tripropylene glycol diacrylate and trimethylolpropane triacrylate.

18 . The cured coating according to claim 16 , wherein the acrylate-containing compound is trimethylolpropane triacrylate.

19 . The cured coating according to claim 16 , wherein the polyisocyanate is selected from the group consisting of tetramethylene diisocyanate, hexamethylene diisocyanate, 2,3,3-trimethylhexamethylene diisocyanate, 1,4-cyclohexylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, 4,4′-dicyclohexyl diisocyanate, 1-diisocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (isophorone diisocyanate), 1,4-phenylene diisocyanate, 2,6-tolylene diisocyanate, 2,4-tolylene diisocyanate, 1,5-naphthylene diisocyanate, 2,4- or 4,4′-diphenylmethane diisocyanate, α,α,α′,α′-tetramethyl-m- or -p-xylylene diisocyanate, and triphenylmethane 4,4′,4″-triisocyanate and mixtures thereof.

20 . The cured coating according to claim 16 , wherein the cured coating has no zipper lines.

Assignees

• Covestro Llc

Inventors

• Wade Robert A
• Gambino Charles A
• Pike Timothy

Classifications

• C08G18/798

  containing urethdione groups · CPC title

• C08G18/725

  Combination of polyisocyanates of C08G18/78 with other polyisocyanates · CPC title

• C08G18/346

  having four carboxylic acid groups · CPC title

• C08G18/73

  acyclic · CPC title

• C09D5/00

  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 title