Intumescent coating composition

Patent metadata

Field	Value
Publication number	US-10113071-B2
Application number	US-201414903930-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Jul 16, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A liquid intumescent coating composition comprising the following components: (a) 25.0-75.0 volume % of one or more organic thermosetting polymer(s) and one or more curing agent(s) for the organic thermosetting polymer(s), (b) 1.0-70.0 volume % of a source of phosphoric or sulphonic acid, (c) 6.0-60.0 volume % of a source of boric acid, (d) 0-2.0 volume % of melamine or melamine derivatives, (e) 0-1.0 volume % of one or more isocyanurate derivatives, wherein the volume % of components (a), (b), (c), (d) and (e) is calculated on the total volume of the non volatile components in the coating composition. The thermosetting intumescent coating composition is suitable for protecting substrates against hydrocarbon fires, for example jet fires. The coating composition can be used without a supporting mesh. The present invention also relates to substrates coated the intumescent coating composition, and a method of protecting structures from fire.

First claim

The invention claimed is:

1. A liquid intumescent coating composition comprising:
(a) 25.0-75.0 volume % of one or more organic thermosetting polymer(s) and one or more curing agent(s) for the organic thermosetting polymer(s), and
(b) 5.0-25.0 volume % of a source of phosphoric or sulphonic acid selected from one or more of sodium, potassium or ammonium phosphate or sulphate salts, and para-toluene sulphonic acid,
(c) 10.0-50.0 volume % of a source of boric acid selected from one or more of boric acid, borate salts, and borosilicates,
(d) 0 volume % of melamine or melamine derivatives, and
(e) 0 volume % of one or more isocyanurate derivatives,
wherein the organic thermosetting polymers do not comprise a polysiloxane, and wherein volume % is calculated on the total volume of the non-volatile components in the coating composition.

2. The intumescent coating composition of claim 1 , wherein the borate salts are selected from one or more of the following: ammonium pentaborate, zinc borate, sodium borate, lithium borate, aluminium borate and magnesium borate.

3. The intumescent coating composition of claim 1 comprising 35.0-65.0 volume % of (a).

4. The intumescent coating composition of claim 1 further comprising 0-2.0 volume % of one or more amine functional blowing agents selected from dicyandiamide, urea and derivatives thereof (f).

5. The intumescent coating composition of claim 4 further comprising a total of 0-2.0 volume % of (i) said amine functional blowing agents selected from dicyandiamide, urea and derivatives thereof (f) and other blowing agents (g), wherein said other blowing agents (g) are selected from expandable graphite, sulfamic acid and tungstanate salts, and derivatives thereof.

6. The intumescent coating composition of claim 1 comprising glass fibres.

7. A coated substrate, wherein the substrate is coated with the intumescent coating composition of claim 1 .

8. The coated substrate according to claim 7 , wherein the coated substrate does not comprise a reinforcing mesh.

9. A method of protecting a structure from fire, the method comprising coating the structure with the intumescent coating composition of claim 1 , and allowing the coating composition to cure.

10. The method of claim 9 , wherein the coating is done without a reinforcing mesh, and the curing is done at ambient temperature.

11. The intumescent coating composition of claim 1 comprising 50.0-65.0 volume % of (a).

12. The intumescent coating composition of claim 1 comprising 10.0-25.0 volume % of (c).

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Butler Rachel
• Kittle Kevin Jeffrey
• Hope Thomas William

Classifications

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C09D5/185 Primary

  Intumescent paints · CPC title

• B05D3/108

  Curing · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08K13/02

  Organic and inorganic ingredients · CPC title