Coating system

Patent metadata

Field	Value
Publication number	US-10808140-B2
Application number	US-201414906972-A
Country	US
Kind code	B2
Filing date	Jul 15, 2014
Priority date	Jul 22, 2013
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A coating, system comprises 30 to 90 parts by weight of a bioresin component and 10 to 70 parts by weight of an isocyanate component, based on 100 parts by weight of the coating system, and has a percent solids of greater than 60%. The bioresin component comprises an acrylic polymer and a biopolyol formed from a natural oil. A method of forming a coating on a substrate with the coating system comprises the steps of combining the bioresin component and the isocyanate component to form a reaction mixture having a percent solids of greater than 60 percent, applying the reaction mixture onto the substrate, and curing the reaction mixture to form the coating on the substrate.

First claim

What is claimed is:

1. A coating system comprising:
(A) 50 to 60 parts by weight of a bioresin component, based on 100 parts by weight of the coating system, said bioresin component comprising;
(i) 20 to 30 parts by weight of an acrylic polymer based on 100 parts by weight of the bioresin component, said acrylic polymer having a hydroxyl number of from 135 to 150 mg KOH/g and a viscosity of from 3,600 to 8,000 mPa·s at 25° C., and
(ii) 55 to 65 parts by weight of a biopolyol formed from coconut oil based on 100 parts by weight of the bioresin component, said biopolyol having a hydroxyl number of from 300 to 330 mg KOH/g and a viscosity of from 700 to 1,400 mPa·s at 25° C.; and

(B) 40 to 50 parts by weight of an isocyanate component that is isocyanurated hexamethylene diisocyanate (HDI) having an NCO content of from 22 to 23 weight percent and a viscosity at 23° C. of from 2,500 to 4,500 mPa·s, based on 100 parts by weight of the coating system, said isocyanate component reactive with said bioresin component;
wherein said coating system has a percent solids of greater than 90 percent, and
said acrylic polymer comprises from 5 to 50 percent by weight 2-ethylhexyl acrylate units, from 5 to 50 percent by weight hydroxyethyl methacrylate units, and from 5 to 50 percent by weight styrene units.

2. A coating system as set forth in claim 1 wherein said acrylic polymer comprises from 30 to 40 percent by weight 2-ethylhexyl acrylate units, from 30 to 40 percent by weight hydroxyethyl methacrylate units, and from 30 to 40 percent by weight styrene units.

3. A coating comprising the reaction product of the coating system of claim 1 .

4. A coating as set forth in claim 3 having a thickness of from 0.5 to 10 mil.

5. A coating as set forth in claim 3 having a Aa of from −2 to 0 and a Ab of from 0.0 to 0.50 when tested for 254 hours in accordance with SAE J-2527.

6. A coating as set forth in claim 3 having a Taber abrasion resistance of less than 60 mg when tested in accordance with ASTM D4060 (1000 cycles, CS-17 mg wheel, weight 1000 grams).

7. A method of forming a coating on a substrate with the coating system as set forth in claim 1 , said method comprising the steps of:
(A) combining 50 to 60 parts by weight of the bioresin component and 40 to 50 parts by weight of the isocyanate component to form a reaction mixture having a percent solids of greater than 90 percent;
(B) applying the reaction mixture onto the substrate; and
(C) curing the reaction mixture to form the coating on the substrate.

8. A method as set forth in claim 7 wherein the bioresin component and the isocyanate component are combined at an isocyanate index of from 90 to 120.

9. A method as set forth in claim 7 wherein the reaction mixture has a pot life of greater than 10 minutes when tested in accordance with ASTM D 2196-05, at 74° F. and 20% RH.

10. A method as set forth in claim 7 wherein the reaction mixture has a set to touch time of equal to or less than 340 minutes, when tested in accordance with ASTM D5895-13 at 74° F. and 20% RH and/or a tack free time of equal to or less than 370 minutes, when tested in accordance with ASTM D5895-13at 74° F. and 20% RH.

11. A method as set forth in claim 7 wherein the substrate comprises particulate matter bound together with a polymeric binder.

12. A method as set forth in claim 11 wherein the substrate is further defined as a pavement comprising glass and/or stone particles bound together with a polyurethane binder.

Assignees

• Basf Se

Inventors

• Caillouette Lyle A
• Praw Michael L
• Janos Jeffrey R
• Haynes Stacy E

Classifications

• C08G18/6229 Primary

  Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols · CPC title

• E01C23/166

  Means for dispensing particulate material on to freshly applied markings or into the marking material after discharge thereof, e.g. reflective beads, grip-improving particles · CPC title

• E01C7/30

  of road-metal and other binders, e.g. synthetic material {, i.e. resin} · CPC title

• E01C7/085

  Aggregate or filler materials therefor; Coloured reflecting or luminescent additives therefor (thin surface layers or surface dressings E01C7/35) · CPC title

• C09D175/14

  Polyurethanes having carbon-to-carbon unsaturated bonds · CPC title