Foam systems , packages and their applications

Abstract

Foam systems and / or foam kits each have 2 or more components, including component(s) containing alkoxysilane-terminated prepolymers (I) and other component(s), such that reactants (II) that can form a gas in contact with one another are in not less than 2 separate components before mixing. Independent claims are included for (1) use of 2 or more (II) in the production of foam from mixtures containing (II) and (I); (2) use of (I) and (II) for producing a foam system and / or kit; (3) process for producing foam from these systems and / or kits.

Description

technical field [0001] The present invention relates to foam systems and / or kits suitable for use on the basis of alkoxysilane-terminated prepolymers, their use in the production of isocyanate-free foams and in the production of said foams and / or kits Application of gas generating agent. The described foam system and / or bags and foam applications are, for example, suitable for the construction field or other fields where the use of foam materials may be suitable, for example for filling cavities, for sealing or for thermal insulation, so that the present invention A corresponding method thereof is also related. Background technique [0002] Foamable mixtures based on prepolymer-containing polyurethanes are known which have a high concentration of isocyanate groups. The reaction to harden the spray foam can occur at room temperature by reaction with suitable reactants such as water and / or polyolefins. Foaming is induced by the propellant gas supplied to the spray box and / o...

AI Technical Summary

Problems solved by technology

The application of this propelling gas can lead to ecological problems, for example, due to the poor solubility of the alkoxysilane-terminated prepolymer or other components present can lead to demixing, adequate explosion protection measures must also be taken, because the spraying container is always Being under pressure, and since the propellant must absorb energy, there is constant cooling of the shot contents while spraying, which can lead to uneven foaming over time

Since the reaction has already taken place in the spray box, the water required for hardening (polymerization) can only be introduced via air humidity or by water from the substrate to be sprayed, which can only produce slow and possibly uneven hardening

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