Infrared reflective clear coating compositions for elastomeric wall and roof coatings

Patent metadata

Field	Value
Publication number	US-9499712-B2
Application number	US-201514755116-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jul 11, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

The present invention provides compositions for use as elastomeric roof coatings having excellent infrared (IR) reflectivity which comprise (i) one or more elastomeric copolymer having a measured glass transition temperature (measured Tg) of from −100 to 0° C. and one or more mesoporous filler, preferably a mesoporous filler that is substantially free of organic groups or residues, the mesoporous filler chosen from mesoporous silica, mesoporous aluminosilicates and mesoporous alumina, wherein the composition has a pigment volume concentration (% PVC) of from 0.1 to 15%. Such compositions provide aqueous or solvent borne clearcoats that can go over existing, already painted or colorcoated roof or wall substrates to preserve their finish or appearance.

First claim

We claim:

1. A composition useful in an infrared reflecting wall or roof coating comprising (i) one or more elastomeric polymer having a measured glass transition temperature (measured Tg) of from −100 to 0° C. and chosen from aqueous acrylic emulsion copolymers, polysiloxanes, and their combinations, and (b) from 0.1 to 25 wt. % of one or more mesoporous filler chosen from mesoporous silica, mesoporous aluminosilicates and mesoporous alumina, wherein the composition has a pigment volume concentration (% PVC) of from 0.1 to 15%.

2. The composition as claimed in claim 1 , wherein the elastomeric polymer has a measured Tg of from −80 to −5° C.

3. The composition as claimed in claim 1 , wherein the one or more mesoporous filler is mesoporous silica.

4. The composition as claimed in claim 3 , wherein the mesoporous silica has an average pore size of from 1 to 100 nm.

5. The composition as claimed in claim 4 , wherein the mesoporous silica has an average pore size of from 2.5 nm to 50 nm.

6. The composition as claimed in claim 1 , wherein the mesoporous filler is substantially free of organic groups or residues.

7. The composition as claimed in claim 1 , which composition is a clearcoat composition.

8. The composition as claimed in claim 1 , further comprising an IR reflective pigment.

9. A method of using the composition as claimed in claim 1 , comprising applying the composition to a painted substrate, a coated substrate, a roofing shingle or a roofing substrate, and letting it dry.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Rokowski Joseph M
• Kilos Beata A
• Matteucci Scott T

Classifications

• C09D7/1208

  Chemistry & Metallurgy · mapped topic

• C09D133/00 Primary

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers · CPC title

• C09D183/04

  Polysiloxanes · CPC title

• C08K7/26

  Silicon- containing compounds · 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