An alternative polyurethane composition is provided which comprises a reaction product of an azidated polyol and a poly(alkynyl carbamate) prepolymer, wherein reaction occurs at a temperature of from 20° C. to 200° C., optionally in the presence of a Cu.sup.I-containing catalyst and wherein the poly(alkynyl carbamate) prepolymer comprises a reaction product of a polyisocyanate, an alkynol, and a glycol ether, wherein from 1 mol % to 33 mol % of isocyanate groups are reacted with glycol ether and the remaining isocyanate groups are reacted with the alkynol. The inclusion of glycol ethers into the polyisocyanate chain of the poly(alkynyl carbamate) prepolymer at a level of from 1 mol % to 33 mol %, is efficient in reducing the viscosity of the composition without compromising its performance in coatings, adhesives, sealants, films, elastomers, castings, foams, and composites made with the inventive alternative polyurethane compositions.

The present invention relates to a thixotropic composition comprising a diurea-diurethane compound and an aprotic solvent, to its process of preparation and also to its use as rheology agent, in particular as thixotropic agent, especially in a binder composition.

The present disclosure is drawn to a reactive polyurethane dispersion including a polymer strand having a polymer backbone that has two ends terminating at a first capping unit and a second capping unit. The polymer backbone can include polymerized monomers including a reactive diol and a diisocyanate. The reactive diol can be an acrylate-containing diol, a methacrylate-containing diol, a styrene-containing diol, or combination thereof. The first capping unit can be a styrene-containing monoalcohol reacted with an isocyanate group of the diisocyanate. The second capping unit can be an ionic stabilizing group.

The present invention provides a blocked polyisocyanate composition comprising a blocked polyisocyanate formed through blocking at least a part of isocyanate groups possessed by a polyisocyanate derived from one or two or more diisocyanates selected from the group consisting of an aliphatic diisocyanate and an alicyclic diisocyanate with an active methylene-based compound comprising a malonic acid diester, wherein a specific molar ratio calculated from contents (mol %) of isocyanurate groups, iminooxadiazinedione groups, uretdione groups, and allophanate groups is 0.05 or more and 0.60 or less.

Disclosed herein is a coating material compositions containing (A) a polyhydroxyl group-containing component, (B) a component (B) having on average at least one isocyanate group and having on average at least one of: at least one hydrolyzable silane group of the formula (I): NR(XSiRx(OR)3-x), and at least one hydrolyzable silane group of the formula (II): N(XSiRx(OR)3-x)n(XSiRy(OR)3-y)m, (D) a phosphorus and nitrogencontaining catalyst, and a catalyst (Z), wherein: the catalyst (Z) is selected from zinc and bismuth carboxylates, of aluminum, zirconium, titanium and/or boron chelates and/or of inorganic, tin-containing catalysts, and mixtures thereof; and the coating material composition comprises at least one reaction accelerator (R) which is selected from the group of inorganic acids and/or of organic acids and/or of partial esters of the inorganic acids and/or of partial esters of the organic acids. Processes for producing multicoat paint systems, and coatings obtained from the coating material compositions are also disclosed.

This invention provides a polymer thick film electrically conductive paste composition, comprising conductive metal powder, a resin blend of polyol and phenoxy resin, blocked aliphatic polyisocyanate and one or more polar, aprotic solvents. In one embodiment the paste composition is used to form electrically conductive adhesive. In another embodiment the paste composition is used to form an electrically conductive polymer thick film.

Disclosed herein is a coating material compositions containing (A) a polyhydroxyl group-containing component, (B) a component (B) having on average at least one isocyanate group and having on average at least one of: at least one hydrolyzable silane group of the formula (I): NR(XSiRx(OR)3-x), and at least one hydrolyzable silane group of the formula (II): N(XSiRx(OR)3-x)n(XSiRy(OR)3-y)m, (D) a phosphorus and nitrogen-containing catalyst, and a catalyst (Z), wherein: the catalyst (Z) is selected from zinc and bismuth carboxylates, of aluminum, zirconium, titanium and/or boron chelates and/or of inorganic, tin-containing catalysts, and mixtures thereof; and the coating material composition comprises at least one reaction accelerator (R) which is selected from the group of inorganic acids and/or of organic acids and/or of partial esters of the inorganic acids and/or of partial esters of the organic acids. Processes for producing multicoat paint systems, and coatings obtained from the coating material compositions are also disclosed.

The invention relates to a process for producing polyisocyanates containing sulfonate groups, the products obtainable by said process and also to the use thereof as starting component for producing polyurethane plastics. The invention further relates to coating compositions comprising polyisocyanates containing sulfonate groups and also to the substrates coated with said coating compositions.

The invention relates to a process for producing polyisocyanates containing sulfonate groups, the products obtainable by said process and also to the use thereof as starting component for producing polyurethane plastics. The invention further relates to coating compositions comprising polyisocyanates containing sulfonate groups and also to the substrates coated with said coating compositions.

The blocked isocyanate is a blocked isocyanate containing a latent isocyanate group, which is an isocyanate group blocked with a blocking agent, wherein the blocked isocyanate includes a first latent isocyanate group that is an isocyanate group blocked with a first blocking agent and a second latent isocyanate group that is an isocyanate group blocked with a second blocking agent; and the first blocking agent is represented by general formula (1) below, and has a higher catalysis activity that activates the isocyanate group than that of the second blocking agent.

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(where R1 to R3 represent a hydrocarbon group having 1 to 12 carbon atoms or a hydrogen atom, and at least one of R1 to R3 represents a hydrogen atom, and R1 and R3 may be bonded to each other to form a heterocycle. R4 represents a hydrocarbon group having 1 to 12 carbon atoms, a hydrogen atom, or an atomic group represented by NR.sup.5R.sup.6 (R5 and R6 represent a hydrocarbon group having 1 to 12 carbon atoms, and R5 and R1 may be bonded to each other to form a heterocycle and R6 and R3 may be bonded to each other to form a heterocycle).