Foamable, insulating-layer-forming multi-component composition having improved storage stability and use of the same

• US 20190322829A1
• Filed: 11/14/2017
• Published: 10/24/2019
• Est. Priority Date: 11/29/2016
• Status: Active Grant

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: MILLER, Jekaterina, Paetow, Mario
• Granted Patent: US 11,319,423 B2
• Time in Patent Office: Days
• CPC Class Codes: B29C 44/02 for articles of definite length, i.e. discrete articles
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2105/0026 Flame proofing or flame retarding agents
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08J 2201/022 premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming
• CPC Class Codes: C08J 2201/026 Crosslinking before of after foaming
• CPC Class Codes: C08J 2203/02 CO2-releasing, e.g. NaHCO3 and citric acid
• CPC Class Codes: C08J 2207/00 Foams characterised by their intended use
• CPC Class Codes: C08J 2207/04 Aerosol, e.g. polyurethane foam spray
• CPC Class Codes: C08J 2300/108 containing hydrolysable silane groups
• CPC Class Codes: C08J 2371/00 Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/0038 containing phosphorus
• CPC Class Codes: C08J 9/0061 characterized by the use of several polymeric components
• CPC Class Codes: C08J 9/0066 Use of inorganic compounding ingredients
• CPC Class Codes: C08J 9/06 by a chemical blowing agent
• CPC Class Codes: C08J 9/08 developing carbon dioxide

Abstract

A foamable, insulating-layer-forming multi-component composition contains alkoxysilane-functional polymer, insulating-layer-forming fire-protection additive, blowing-agent mixture, cross-linking agent, and a flame-protection agent that is miscible in water or another compound that is miscible in water. The individual ingredients of the blowing-agent mixture are separated from one another to ensure inhibition of reaction prior to use of the composition, and the cross-linking agent is separated from the alkoxysilane-functional polymer to ensure inhibition of reaction prior to use of the composition. The foamable, insulating-layer-forming multi-component composition can be used as a foam-in-place foam or for production of molded blocks.

Claims

1. :

A foamable, insulating-layer-forming multi-component composition, comprising;

at least one alkoxysilane-functional polymer, which contains, as terminal groups and/or as side groups along the polymer chain, at least two alkoxy-functional silane groups of formula (I);

—

Si(R¹)_m(OR²)_3-m 

 

(I),

wherein R¹ stands for a linear or branched C₁-C₁₆ alkyl moiety, R² stands for a linear or branched C₁-C₆ alkyl moiety, and m stands for a whole number from 0 to 2,

at least one cross-linking agent, which, prior to use of the composition, is separated from the alkoxysilane-functional polymer to ensure inhibition of reaction,

a blowing-agent mixture, the individual ingredients of which, prior to use of the composition, are separated from one another to ensure inhibition of reaction,

at least one insulating-layer-forming fire-protection additive, and

7 to 30 wt %, relative to the total weight of the composition, of at least one compound selected from the group consisting of liquid flame-protection agents and liquid compounds that are respectively miscible with water,

wherein the polymer has a dynamic viscosity in the range of 5 to 27 Pa·

s, measured with a Kinexus Ultra+ from Malvern Instruments Ltd.;

at a temperature of 23°

C.;

with a spindle type;

plate with a diameter of 20 mm with a 2 mm slit;

at a rotational speed of 100 s<sup>−

1</sup>, and wherein the polymer comprises a basic backbone, which is at least one member selected from the group consisting of an alkyl chain, a polyether, polyester, polyether ester, polyamide, polyurethane, polyester urethane, polyether urethane, polyether ester urethane, polyamide urethane, polyurea, polyamine, polycarbonate, polyvinyl ester, polyacrylate, polyolefin, polyisobutylene, polysulfide, rubber, neoprene, phenol resin, epoxy resin and melamine,

with the proviso that the composition does not contain any catalyst.

2. :

The composition according to claim 1, wherein the at least one liquid flame-protection agent is at least one member selected from the group consisting of phosphates, phosphonates and flame-protection polyols that are miscible with water.

3. :

The composition according to claim 2, wherein the at least one liquid flame-protection agent is at least one member selected from the group consisting of diethylethane phosphonate, triethylphosphate phosphonate, dimethylpropyl phosphonate, dimethylmethane phosphonate, diethylethane phosphonate, triethyl phosphate, dimethylpropyl phosphonate and dimethylmethane phosphonate.

4. :

The composition according to claim 1, wherein the at least one liquid compound is at least one member selected from the group consisting of acetone, sulfolane, ethanol, methanol and mixtures thereof.

5. :

The composition according to claim 1, wherein the blowing-agent mixture comprises compounds that, after being mixed, react with one another with formation of carbon dioxide (CO₂), of hydrogen (H₂) or of oxygen (O₂).

6. :

The composition according to claim 5, wherein the blowing-agent mixture comprises an acid and a compound, that is able to react with the acid to form carbon dioxide.

7. :

The composition according to claim 1, wherein the alkoxysilane-functional polymer is a mixture that comprises polymers with several similar or different basic backbones.

8. :

The composition according to claim 1, wherein the basic backbone is a polyurethane and/or a polyether.

9. :

The composition according claim 1, wherein the cross-linking agent is water or a water-containing ingredient.

10. :

The composition according to claim 1, wherein the insulating-layer-forming fire-protection additive comprises at least one thermally expandable compound and/or a mixture that contains at least one dehydrogenation catalyst, at least one gas builder and optionally at least one carbon source.

11. :

The composition according to claim 10, wherein the fire-protection additive further contains an ash-crust stabilizer.

12. :

The composition according to claim 1, wherein the composition contains a co-cross-linking agent.

13. :

The composition according to claim 1, further comprising at least one further ingredient which is selected from the group consisting of plasticizers, water scavengers, inorganic fillers and further additives.

15. :

A molded block obtained from a composition according to claim 1, wherein the respective components are mixed with one another and the mixture is foamed in a mold.

16. :

A method of fire protection, the method comprising;

mixing components of the composition according to claim 1 with one another, thereby obtaining a mixture, and

foaming the mixture in a mold.

17. :

A method of fire protection, the method comprising;

applying the composition according to claim 1, as a mixture, to at least one cavity or surface selected from the group consisting of openings;

cable or pipe penetrations in walls, floors and/or ceilings;

joints between a ceiling and a wall part;

joints between a masonry opening and a construction part to be installed;

joints between a ceiling and a wall; and

joints between an outside wall and a curtain-wall facade of a building.

14. (canceled)