Coating composition

Patent metadata

Field	Value
Publication number	US-10533097-B2
Application number	US-201715710671-A
Country	US
Kind code	B2
Filing date	Sep 20, 2017
Priority date	Sep 20, 2017
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A coating composition comprising: a) a first expandable graphite compound having a mean particle size in the range of from 300 microns to 1000 microns; b) a second expandable graphite compound having a mean particle size in the range of from 0.5 microns to 250 microns; c) a binder comprising: i) a thermoplastic compound and ii) a thermoset compound; d) a catalyst; and e) a blowing agent, is disclosed.

First claim

The invention claimed is:

1. A composition comprising:
a) a first expandable graphite compound having a mean particle size in the range of from 300 microns to 1000 microns;
b) a second expandable graphite compound having a mean particle size in the range of from 0.5 microns to 250 microns with a first expandable graphite compound to second expandable graphite compound weight ratio in the range of from 4:1 to 1:4;
c) a binder comprising:
i) a thermoplastic compound; and
ii) a thermoset compound with a thermoplastic compound to thermoset compound weight ratio in the range of from 10:1 to 1:3;

d) a catalyst; and
e) a blowing agent.

2. A composition in accordance with claim 1 wherein the first expandable graphite compound and second expandable graphite compound are present in a combined amount in the range of from 1 weight percent to 50 weight percent, based on the total weight of the composition.

3. A composition in accordance with claim 1 wherein the binder is present in the range of from 10 weight percent to 80 weight percent, based on the total weight of the composition.

4. A composition in accordance with claim 1 wherein the thermoplastic compound is selected from the group consisting of polyvinyl acetate, poly(methyl (meth)acrylate), poly(ethyl (meth)acrylate), poly(n-butyl (meth)acrylate), poly(isobutyl (meth)acrylate), poly(tert-butyl (meth)acrylate), poly(2-hydroxyethyl (meth)acrylate), poly (2-hydroxypropyl (meth)acrylate), poly(2-ethylhexyl (meth)acrylate), and combinations thereof.

5. A composition in accordance with claim 1 wherein the thermoset compound is selected from the group consisting of phenol formaldehyde, urea formaldehyde, melamine formaldehyde, melamine reinforced urea formaldehyde, isocyanate reinforced urea formaldehyde resin, resorcinol formaldehyde resin, polyacrylic latex resin, isocyanate resin, an organopolysiloxane, ethylene glycol, bisphenol-A epoxy resins, bisphenol-F epoxy resins, unsaturated polyesters, and combinations thereof.

6. A composition in accordance with claim 1 wherein the blowing agent is selected from the group consisting of melamine, urea, butyl urea, alumina trihydrate, dicyandiamide, benzene sulfonyl-hydrazide, azobisisobutyronitrile, 1,1-azobisformamide, 4,4′oxybis(benzene sulfonhydrazide), dinitroisopentamethylene tetraamine, and combinations thereof.

7. A composition in accordance with claim 1 wherein the blowing agent is present in the range of from 1 weight percent to 20 weight percent, based on the total weight of the composition.

8. A composition in accordance with claim 1 wherein the catalyst is selected from the group consisting of perchloric acid, hydroiodic acid, hydrobromic acid, sulfuric acid, hydrochloric acid, nitric acid, sulfurous acid, phosphoric acid, nitrous acid, sulfonic acid, hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, maleic acid, malic acid, tartaric acid, citric acid, ammonium phosphates, metal phosphates, paratoluene sulfonic acid, and combinations thereof.

9. A composition in accordance with claim 1 wherein the catalyst is present in the range of from 0.5 weight percent to 20 weight percent, based on the total weight of the composition.

10. A wood substrate coated with the composition of claim 1 .

11. A wood substrate in accordance with claim 10 wherein the wood substrate is an I-joist.

Assignees

• Hexion Inc

Inventors

• Lai Zhen
• Clark Mark
• Wallenta Kali
• Nuila Carlos

Classifications

• C08K3/11

  Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table · CPC title

• C09D7/63

  organic · CPC title

• C09D7/61

  inorganic · CPC title

• C09K21/14

  Macromolecular materials · CPC title

• C09D5/185 Primary

  Intumescent paints · CPC title