Intumescent coating composition

Patent metadata

Field	Value
Publication number	US-2016145446-A1
Application number	US-201414903905-A
Country	US
Kind code	A1
Filing date	Jul 11, 2014
Priority date	Jul 16, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

The present invention relates to a thermosetting intumescent coating composition which 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 with the intumescent coating composition, and a method of protecting structures from fire.

First claim

1 . A liquid ambient temperature curable intumescent coating composition comprising:
(a) 25.0-75.0 volume % of one or more organic thermosetting polymer(s) and curing agent(s) for the organic thermosetting polymer(s), (b) 5.0-70.0 volume % of one or more source(s) of phosphoric acid and/or sulphonic acid, (c) 1.0-60.0 volume % of one or more source(s) of metal and/or metalloid ion(s) selected from oxides, hydroxides, carbonates, bicarbonates, phosphates, chlorides, sulphates, nitrates, silicates, and borates of Al, Ti, Zn, Cu, Zr, Mg, Na or Ca; and oxides, hydroxides, and carbonates of Si or B; and complexes thereof, (d) 0.0-5.0 volume % of amine functional blowing agents selected from urea, dicyandiamide, melamine and derivatives thereof, provided that the total volume of said amine functional blowing agents is no greater than 25% of the volume of (c), wherein volume % is calculated on the total volume of the non-volatile components in the coating composition.

2 . The liquid ambient temperature curable intumescent coating composition of claim 1 , comprising a total of 0-5.0 volume % of said blowing agents (d) and other blowing agents (e), wherein said other blowing agents (e) are selected from expandable graphite, THEIC, sulfamic acid, boric acid, borate salts, tunastanate salts, and derivatives thereof.

3 . The liquid ambient temperature curable intumescent coating composition of claim 2 , comprising a total of 0-5.0 volume % of said blowing agents (d) and (e) and further components (f) that are capable of imparting a blowing function to a cured coating.

4 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein (a) comprises an organic thermosetting polymer comprising at least one of the following functional groups: epoxy, amine, ester, vinyl, vinyl ester, amide, urethane, mercaptan, carboxylic acid, acryloyl, methacryloyl, isocyanate, alkoxysilyl, anhydride, hydroxyl, alkoxy or and polythiol groups.

5 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein (a) comprises an organic thermosetting polymer selected from an epoxy resin, an organopolysiloxane resin, or a combination thereof, and a curing agent selected from an amine, a thiol, a carboxylic acid, an anhydride and/or an alcohol functional curing agent.

6 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein (b) is selected from ammonium polyphosphate (APP) or para-toluene sulphonic acid.

7 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein (c) is selected from one or more oxides, hydroxides, carbonates, bicarbonates, phosphates, chlorides, sulphates, nitrates, silicates, and borates of Al, Ti, Zn, Cu, Zr, Mg, Na or Ca, and complexes thereof.

8 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein (c) is selected from one or more of TiO 2 , ZnO, ZnPO 4 , Al(OH) 3 , Al 2 O 3 , AlPO 4 , Kaolin, MgO, MgPO 4 or ZrO 2 .

9 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein the organic thermosetting polymer of (a) comprises an epoxy functional resin and an amine functional curing agent.

10 . The liquid ambient temperature curable intumescent coating composition of claim 3 , wherein the total volume of the blowing agents (d)+(e)+(f), is no greater than 5% of the volume of (c).

11 . The liquid ambient temperature curable intumescent coating composition of claim 1 , wherein the volume % of (c) ranges from 5.0 to 12.0 vol %.

12 . A substrate coated with the liquid ambient temperature curable intumescent coating composition of claim 1 .

13 . A method of protecting structures from fire, the method comprising coating the structure with the liquid ambient temperature curable intumescent coating composition of claim 1 , and allowing the coating composition to cure at ambient temperature.

14 . (canceled)

15 . The liquid ambient temperature curable intumescent coating composition of claim 2 , wherein (a) comprises an organic thermosetting polymer comprising at least one of the following functional groups: epoxy, amine, ester, vinyl, vinyl ester, amide, urethane, mercaptan, carboxylic acid, acryloyl, methacryloyl, isocyanate, alkoxysilyl, anhydride, hydroxyl, alkoxy or polythiol groups.

16 . The liquid ambient temperature curable intumescent coating composition of claim 2 , wherein (a) comprises an organic thermosetting polymer selected from an epoxy resin, an organopolysiloxane resin, or a combination thereof, and a curing agent selected from an amine, a thiol, a carboxylic acid, an anhydride and/or an alcohol functional curing agent.

17 . The liquid ambient temperature curable intumescent coating composition of claim 3 , wherein (b) is selected from ammonium polyphosphate (APP) or para-toluene sulphonic acid.

18 . The liquid ambient temperature curable intumescent coating composition of claim 3 , wherein (c) is selected from one or more oxides, hydroxides, carbonates, bicarbonates, phosphates, chlorides, sulphates, nitrates, silicates, and borates of Al, Ti, Zn, Cu, Zr, Mg, Na or Ca, and complexes thereof.

19 . The liquid ambient temperature curable intumescent coating composition of claim 3 , wherein (c) is selected from one or more of TiO 2 , ZnO, ZnPO 4 , Al(OH) 3 , Al 2 O 3 , AlPO 4 , Kaolin, MgO, MgPO 4 or ZrO 2 .

20 . The liquid ambient temperature curable intumescent coating composition of claim 2 , wherein the volume % of (c) ranges from 5.0 to 12.0 vol %.

21 . The liquid ambient temperature curable intumescent coating composition of claim 3 , wherein the volume % of (c) ranges from 5.0 to 12.0 vol %.

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Kittle Kevin Jeffrey
• Butler Rachel

Classifications

• C09D5/185 Primary

  Intumescent paints · CPC title

• C09D163/00 Primary

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