Hilti Aktiengesellschaft

Basf Aktiengesellschaft

Elastogran Gmbh

Franz Heimpel

Peter Vogel

Silvia Huber

Markus K&ouml;gler

Hans-Juergen Reese

Heinz Forster

Herbert M&uuml;nzenberger

Stefan Rump

Christian F&ouml;rg

Wolfgang Lieberth

Markus KÖGLER

The use of a plastic foam system, which contains at least one filler capable of swelling in the presence of water, for sealing openings in buildings, which are in contact with the outside, especially wall, floor and ceiling channels of pipes and/or cables.

Use of plastic foams containing swellable fillers for sealing wall channels

A two-component on-site foam system for producing an intumescing fire protection foam is described with a density of less than 200 kg/m and an increased fire resistance endurance, with a polyol component (A), which contains at least one polyol, one catalyst for the reaction between the polyol and the polyisocyanate, water or a blowing agent based on a compressed or liquefied gas as foam-forming agent and at least one intumescing material based on an acid-forming agent, a carbon-supplying compound and a gas-forming agent, and a polyisocyanate component (B), which contains at least one polyisocyanate, wherein the polyol component (A) contains at least one polyester polyol, at least one aminopolyol, at least one halogen-containing polyol, at least one acid-forming agent, expanding graphite and at least one ash crust stabilizer, the quantitative ratios of the polyols to the polyisocyanate or polyisocyanates being matched so that, when the polyol component (A) is mixed with the polyisocyanate component (B) as specified, the molar ratio of isocyanate groups of the polyisocyanate to the hydroxyl groups of the polyol (NCO:OH ratio) is larger than 1:1, as well as to the use of this system for filling openings, cable and pipe leadthroughs in walls, floors and/or ceilings of buildings with foam for the purpose of fire protection.

Two-component on-site foam system and its use for foaming openings for the purpose of fire protection

For sealing an annular space ( ) between opening ( ) in a wall or similar, member ( ) and an object ( ), extending through the opening ( ), by introducing a sealing agent into the space ( ), at least one bag ( ), into which the sealing agent is introduced, is positioned in the space ( ). For this purpose, a supporting element ( ) is used, which can be positioned in the opening and to which a bag ( ) is fastened. The annular space ( ) can be sealed easily and also liquid-tight in this manner.

Method and apparatus for sealing a space

A method of and a device for sealing a gap ( ) between a leadthrough ( ) arranged in a constructional element ( ) and an object ( ) extending through the leadthrough ( ), according to which an elastic sealing element ( ) which surrounds the object ( ) is placed in the gap ( ) and is compressed in an axial direction of the leadthrough ( ) and is fixed in its compressed condition with a fastening element ( ).

Method of and device for sealing a gap

A method for sealing a gap ( ) between a leadthrough ( ) provided in a constructional element ( ) and an object ( ) extending through the leadthrough ( ), the method including placing in the gap ( ) a plurality of elongate sealing elements, formed as hot melt elements ( ) provided with heat-activated blowing agent, and applying heat to the hot melt element from outside; and a sealing element used by the method.

Method of and a sealing element for sealing a gap

For sealing an annular space or space ( ) between an opening ( ), in a wall or similar member ( ), and an object ( ) extending through the opening ( ), at least one sealing element ( ) is placed in the annular space ( ). Initially, the sealing element ( ) is placed in the compressed state between the wall ( ) and the object ( ) and subsequently is released from the compressed state to an expanded state. For this purpose at first, the sealing element ( ) is compressed by a sheath ( ) which, after the sealing element ( ) is positioned in the annular space ( ), is destroyed and makes the expansion of the sealing element ( ) possible.

A one-component polyurethane foam composition is described, which contains at least one prepolymer (isocyanate prepolymer), which has isocyanate groups, at least one blowing agent and known auxiliary and additive materials containing at least one ester, free of reactive hydrogens, of a polycarboxylic C to C acid and a monohydric C to C alcohol and/or a monocarboxylic C to C acid with a multihydric C to C alcohol as means for improving the complete and embrittlement-free curing even at low temperatures and/or low ambient humidities, as well as the use of these esters, which are free of reactive hydrogen atoms, for improving the embrittlement-free curing of such one-component polyurethane foam compositions under unfavorable conditions (low temperature and little available ambient humidity).

One-component polyurethane compositions with improved curing

Pressurized, blowing agent-containing isocyanate semiprepolymer mixtures advantageously having an isocyanate content of from 5 to 25% and based on organic polyisocyanates and alkoxylated lignin having a hydroxyl number of from 30 to 80, preferably in admixture with lignin-free polyhydroxyl compounds are used for producing single-component polyurethane foams.

Pressurized, blowing agent-containing isocyanate semiprepolymer mixtures

The invention relates to pressurized, blowing-agent-containing isocyanate semiprepolymer mixtures, advantageously having an isocyanate content of from 5 to 25% by weight, based on organic polyisocyanates and polyhydroxyl compounds which are used in combination with a linear, branched or cyclic, saturated or olefinically unsaturated monoalcohol having 1 to 25 carbon atoms and/or hydroxyketones, preferably .beta.-hydroxyketones, the use thereof for the production of one-component polyurethane foams by allowing the isocyanate semiprepolymer mixtures to depressurize, and a process therefor.

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Affing, Germany

Franz Heimpel