Insulating layer-forming composition and use thereof

Patent metadata

Field	Value
Publication number	US-10000659-B2
Application number	US-201514739454-A
Country	US
Kind code	B2
Filing date	Jun 15, 2015
Priority date	Dec 18, 2012
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

Described is an insulating layer-forming composition, which contains a binder based on epoxy-thiol. The inventive composition, its rate of expansion ratio is relatively high, allows coatings having the layer thickness, required for the respective period of fire resistance, to be applied in a simple and fast manner, while at the same time the layer thickness is reduced to a minimum and yet a high insulating effect can be achieved. The composition of the invention is particularly suitable for fire protection, in particular as a coating of metallic and non-metallic substrates, such as steel components, like columns, beams, trusses, in order to increase the period of fire resistance.

First claim

The invention claimed is:

1. An insulating layer-forming composition, comprising:
a first constituent, which contains at least one epoxy resin, wherein the epoxy resin has an EEW≤200 g/eq and is based on bisphenol A and bisphenol F reacted with epichlorohydrin,
a second constituent, which contains at least one thio compound as a curing agent, and
a third constituent, which contains an intumescent additive which is a mixture of pentaerythritol, melamine, ammonium polyphosphate and titanium dioxide, and
a catalyst for the reaction of the epoxy resin with the thio compound,
wherein the catalyst contains 2,4,6-tris(di-methylaminomethyl) phenol,
wherein the composition is formulated as a two-component system; and the first constituent and the second constituent are divided between the two components, a first component and a second component, to inhibit a reaction, until curing is desired,
wherein the at least one epoxy resin is present in an amount of 15 to 95% by wt. in the first component and the at least one thio compound is present in an amount of 0.5 to 90% by wt. in the second component,
wherein the thio compound is at least one thiol functionalized compound selected from the group consisting of glycol-bis(2-mercaptoacetate), glycol-bis(3-mercaptopropionate), 1,2-propylene glycol bis(2-mercaptoacetate), 1,2-propylene glycol bis(3-mercaptopropionate), 1,3-propylene glycol bis(2-mercaptoacetate), 1,3-propylene glycol bis(3-mercaptopropionate), tris(hydroxymethyl) methane tris(2-mercaptoacetate), tris(hydroxymethyl) methane tris(3-mercaptopropionate), 1,1,1-tris(hydroxymethyl) ethane tris(2-mercaptoacetate), 1,1,1-tris(hydroxymethyl) ethane tris(3-mercaptopropionate), 1,1,1-trimethylolpropane tris(2-mercaptoacetate), ethoxylated 1,1,1-trimethylolpropane tris(2-mercaptoacetate), propoxylated 1,1,1-trimethylolpropane tris(2-mercaptoacetate), 1,1,1-trimethylol propane tris(3-mercaptopropionate), ethoxylated 1,1,1-trimethylolpropane tris(3-mercaptopropionate), propoxylated trimethylolpropane tris(3-mercaptopropionate), 1,1,1-trimethylolpropane tris(3-mercaptobutyrate), pentaerythritol tris(2-mercaptoacetate), pentaerythritol tetrakis(2-mercaptoacetate), pentaerythritol tris(3-mercaptopropionate), pentaerythritol tetrakis(3-mercaptopropionate), pentaerythritol tris(3-mercaptobutyrate), pentaerythritol tetrakis(3-mercaptobutyrate), polymercaptans, 2-ethylhexyl thioglycolate, iso-octyl thioglycolate, di(n-butyl) thiodiglycolate, glycol-di-3-mercaptopropionate, 1,6-hexanedithiol, ethylene glycol bis(2-mercaptoacetate) and tetra(ethylene glycol) dithiol.

2. The insulating layer-forming composition of claim 1 , wherein the at least one epoxy resin and the at least one thio compound are multifunctional.

3. The insulating layer-forming composition of claim 1 , wherein the one or more thiol group(s) of the at least one thiol functionalized compound are bonded to a monomer, an oligomer or a polymer, as a skeleton.

4. The insulating layer-forming composition of claim 1 , wherein the second constituent further contains at least one amine as a co-curing agent.

5. The insulating layer-forming composition of claim 4 , wherein the at least one amine is selected from the group consisting of primary aliphatic amines, secondary aliphatic amines, and polyamines.

6. The insulating layer-forming composition of claim 1 , wherein the ratio of the total number of epoxy groups to the number of thiol groups is in a range of 0.1:1 to 10:1.

7. The insulating layer-forming composition of claim 1 , wherein the intumescent additive further contains at least one ash crust stabilizer.

8. The insulating layer-forming composition of claim 1 , further comprising organic and/or inorganic aggregates and/or additional additives.

9. The insulating layer-forming composition of claim 1 , wherein the first constituent is contained in the first component; and the second constituent is contained in the second component.

10. The insulating layer-forming composition of claim 1 , wherein the third constituent is divided between the first component and the second component in such a way that the first component and the second component are separated from each other to inhibit a reaction.

11. The insulating layer-forming composition of claim 10 , wherein the third constituent contains an ash crust stabilizer, which is divided between the first component and the second component in such a way that the first component or the second component contains at least a portion of the ash crust stabilizer.

12. A method of coating an article, said method comprising:
coating said article with an insulating layer-forming composition as claimed in claim 1 .

13. The method as claimed in claim 12 , wherein the article is a steel construction element.

14. The method as claimed in claim 12 , wherein the article is a metallic and/or non-metallic substrate.

15. A fire retardant layer, comprising:
insulating layer-forming composition as claimed in claim 1 .

16. A cured object, obtained by curing an insulating layer-forming composition, as claimed in claim 1 .

17. A coated article, comprising:
an insulating layer-forming composition as claimed in claim 1 .

18. The article as claimed in claim 17 , which is a steel construction element.

19. The article as claimed in claim 17 , which is a metallic and/or non-metallic substrate.

20. An insulating layer-forming composition, comprising:
a first constituent, which contains at least one epoxy resin, wherein the epoxy resin has an EEW≤200 g/eq and is based on bisphenol A and bisphenol F reacted with epichlorohydrin,
a second constituent, which contains at least one thio compound as a curing agent, and
a third constituent, which contains an intumescent additive which is a mixture of pentaerythritol, melamine, ammonium polyphosphate and titanium dioxide, and
a catalyst for the reaction of the epoxy resin with the thio compound,
wherein the catalyst is selected from compounds of formula (XX),

wherein
R 1 is hydrogen or a linear or branched C 1 to C 15 alkyl radical;
R 2 is (CH 2 ) n NR 5 R 6 — or NH(CH 2 ) n NR 5 R 6 —,
wherein R 5 and R 6 are independently of each other a linear or branched C 1 to C 15 alkyl radical; and n=0 or 1;

R 3 and R 4 are independently of each other hydrogen, (CH 2 ) n NR 7 R 8 or NH(CH 2 ) n NR 7 R 8 ;
R 7 and R 8 are independently of each other hydrogen or a linear or branched C 1 to C 15 alkyl radical; and n=0 or 1;

wherein the composition is formulated as a two-component system; and the first constituent and the second constituent are divided between the two components, a first component and a second component, to inhibit a reaction, until curing is desired,
wherein the at least one epoxy resin is present in an amount of 15 to 95% by wt. in the first component and the at least one thio compound is present in an amount of 0.5 to 90% by wt. in the second component,
wherein the thio compound is at least one thiol functionalized compound selected from the group consisting of glycol-bis(2-mercaptoacetate), glycol-bis(3-mercaptopropionate), 1,2-propylene glycol bis(2-mercaptoacetate), 1,2-propylene glycol bis(3-mercaptopropionate), 1,3-propylene glycol bis(2-mercaptoacetate), 1,3-propylene glycol bis(3-mercaptopropionate), tris(hydroxymethyl) methane tris(2-mercaptoacetate), tris(hydroxymethyl) methane tris(3-mercaptopropionate), 1,1,1-tris(

Assignees

• Hilti Ag

Inventors

• Lang Martin

Classifications

• C08K3/016

  Flame-proofing or flame-retarding additives · CPC title

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title

• C08G59/66

  Mercaptans · CPC title

• C09D5/185

  Intumescent paints · CPC title

• C08L63/00

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