A one-component moisture curing composition and a method for sealing construction joints against penetration of water. The one-component moisture curing composition includes at least one isocyanate-functional polyurethane polymer, at least one inorganic swelling agent selected from the group including aluminum sulfate and magnesium sulfate, and at least one hydrophilic aldimine of formula (I).

The invention relates to a composition comprising and to a process for preparing moisture-crosslinking polymers under catalysis by a metal-siloxane-silanol(ate) compound, and to the use of the composition in the CASE sector (coatings, adhesives, sealants and elastomers), especially in the field of adhesives and sealants.

The present invention provides a reaction mixture comprising a blend of a first isocyanate-based uretdione-containing resin and a second isocyanate-based uretdione-containing resin, a neutralized polyol and a tertiary amine catalyst, and optionally, an additive package selected from the group consisting of flow control additives, pigments (colorants), wetting agents, and solvents, wherein the first isocyanate and the second isocyanate are different. The first isocyanate-based uretdione-containing resin and the second isocyanate-based uretdione-containing resin may be cold blended or hot blended. Coatings, adhesives, castings, composites, and sealants made from hot blended formulations exhibit superior performance over those made from cold blended formulations.

Provided is a polyurethane resin-forming composition for a membrane-sealing material, the polyurethane resin-forming composition contributing to formation of (1) a urethane resin that is excellent in moldability, has a suppressed elution amount of a low-molecular-weight reaction product, and has excellent appearance or (2) a urethane resin that has a low viscosity, is excellent in cast moldability, and has a reduced water elution amount of a low-molecular-weight reaction product and a reduced solvent elution amount of a molded product.

The polyurethane resin-forming composition for a membrane-sealing material comprises: a polyisocyanate prepolymer (A) or an allophanate group-containing polyisocyanate prepolymer (A′) comprising a reaction product of a diphenylmethane diisocyanate (a1-1) and/or a modified product of a diphenylmethane diisocyanate (a1-2), and an active hydrogen-containing compound (a2); and a castor oil polymerized polyol (b1) comprising a castor oil polymerization product.

A polysiloxane composition which is curable by condensation, contains at least one hydroxyl-terminated polyorganosiloxane, at least one diacetoxysilane optionally bearing an alkoxy group, at least one multifunctional alkoxysilane, at least one filler, and at least one catalyst.

The present invention relates to a moisture-curable composition that is a compound containing a silane-terminated modified polymer as a main component, has both excellent workability due to low viscosity at a high shear rate and sufficiently high thixotropic properties due to high viscosity at a low shear rate, and during attachment of a heavy object such as a ceramic tile to a substantially vertical face of a construction or the like, can prevent sagging of the ceramic tile. The moisture-curable composition of the present invention is a moisture-curable composition prepared by adding (A) a polymer having a hydrophobic moiety and a hydrophilic moiety as a main component, (B) a diluent having a predetermined viscosity range, (C) hydrophobized inorganic particles, and (D) a thixotropic agent having a hydrophobic moiety and a hydrophilic moiety, whereby the composition exhibits performances of suppressing the viscosity at a high shear rate to a value equal to or lower than a certain value, and at the same time, increasing the viscosity at a low shear rate.

Provided are an ultraviolet curable organopolysiloxane composition having a favorable ultraviolet curability; and a cured product thereof that has a favorable adhesiveness. The ultraviolet curable organopolysiloxane composition contains: (A) a compound represented by the following general formula (1)

##STR00001## wherein R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms or an alkoxy group having 1 to 3 carbon atoms, the multiple R.sup.1s may be identical to or different from each other, and each R.sup.2 independently represents a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms or a triorganosilyl group; and an ultraviolet curable organopolysiloxane.

The invention relates to the use of at least one metal-siloxane-silanol(ate) compound for selective catalysis of the gel reaction in a system for the production of polyurethanes, preferably of unfoamed polyurethanes, flexible foams or rigid foams and/or in the two-component (2K) system according to the invention, and to processes for producing foamed or unfoamed polyurethanes, especially flexible foams or rigid foams, and to use in the CASE sector (coatings, adhesives, sealants and elastomers), furniture, mattresses, car seats, seal materials or acoustic materials, for insulation of district heating pipes, tanks and pipelines, and for production of all kinds of refrigeration units. In a further aspect, the invention relates to unfoamed polyurethanes, flexible foams and/or rigid foams each produced through the inventive use of at least one metal-siloxane-silanol(ate) compound for selective catalysis of the gel reaction.

The present invention relates to a liquid composition comprising at least one silylated polymer and at least one tin-free polyhedral oligomeric titanium silsesquioxane in liquid form.

A process for preparing a crosslinkable composition comprising at least one alkoxysilane-terminated silyl polymer P, and at least one catalytic system B comprises: a. preparing an alkoxysilane-terminated silyl polymer P comprising: a-1) the polyaddition reaction between a composition of polyol(s) and a composition of polyisocyanate(s), in the presence of a catalyst A chosen from carboxylates based on bismuth and/or zinc, in order to prepare an NCO-terminated polymer; a-2) the reaction of the NCO-terminated polymer obtained in step a-1) with an organosilane compound having at least one function that is reactive with the —NCO function of the NCO-terminated polymer; and b. bringing the silyl polymer P obtained in step a) into contact with a catalytic crosslinking system B which is a mixture of zinc-based carboxylate(s) and cyclic amidine. The process is carried out in the absence of a tin-based catalyst.