The invention relates to novel urethane or carbamate compounds which can act as a catalyst for the reaction of at least one isocyanate compound with at least one isocyanate-reactive compound, in particular for the manufacture of polyisocyanate polyaddition products, such as polyurethanes, in particular, for the manufacture of polyurethane (PU) foams, where they exhibit superior blowing performance.

A process for producing polymer-supported metal nanoparticles involves confinement of metal nanoparticles in polymeric nanotubes or nanosheets in an aqueous environment using hydrophobic reactants. Metal nanoparticles supported in the polymeric nanotubes or nanosheets are substantially monodisperse and have an average particle size of 4 nm or less. The polymer-supported metal nanoparticles are useful in fuel cells, sensors, bioanalysis, biological labeling or semi-conductors, especially as catalysts.

The present invention relates to a method to form a polyurethane material, a catalyst composition comprising metalized polyhedral oligomeric silsesquioxanes (POMS) compounds in combination with reactive compounds suitable to be used to provide a polyurethane material and the polyurethane material obtained using the catalyst composition.

A tetraanionic OCO pincer ligand metal-oxo-alkylidene complex is prepared from a trianionic pincer ligand supported metal-alkylidyne. The metal can be tungsten or other group 5-7 transition metal. The tetraanionic pincer ligand metal-oxo-alkylidene complex, a trianionic OCO pincer ligand metal complex, or a trianionic ONO pincer ligand metal complex can be used to polymerize cycloalkenes. The poly(cycloalkene)s are predominantly cis-alkene macrocyclics.

The present invention relates to a manufacturing method of a polyalkylene carbonate resin capable of suppressing agglomeration among catalyst particles during polymerization to maintain an excellent catalytic activity in a polymerization process, wherein the manufacturing method of a polyalkylene carbonate resin may include polymerizing epoxide and a monomer including carbon dioxide in the presence of a zinc dicarboxylate-based organic zinc catalyst and a dispersant, and the dispersant may include at least one selected from the group consisting of C1-C10 alkyl acrylate, C1-C10 alkyl methacrylate, C1-C20 monocarboxylic acid having an oxo group in a molecular structure, and a polyether-based polymer having C2-C6 alkylene oxide repeating units.

The present invention is directed to reaction mixtures comprising a water-surfactant mixture, wherein the catalyst comprises a compound with solubilizing groups. This technology improves the solubility of the reaction components in the water-surfactant mixture and thereby, greatly increases the productivity and selectivity of the chemical reaction.

Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a copper catalyst that contains at least one copper atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.

The present invention provides novel metal complexes, methods of making, and methods of using the same.

A titanium-oxo-chelate catalyst formulation, comprising: (i) at least one compound of the formula (I), wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 independently of each other are for example hydrogen, halogen, C.sub.1-C.sub.20alkyl, C.sub.6-C.sub.14aryl which is unsubstituted or substituted; or R.sub.1, R.sub.2 and R.sub.3 and/or R.sub.4, R.sub.5 and R.sub.6 and/or R.sub.7, R.sub.8 and R.sub.9 and/or R.sub.10, R.sub.11 and R.sub.12 together with the C-atom to which they are attached each form a C.sub.6-C.sub.14aryl group which is unsubstituted or substituted; or R.sub.1 and R.sub.2 and/or R.sub.4 and R.sub.5 and/or R.sub.7 and R.sub.8 and/or R.sub.10 and R.sub.11 together with the C-atom to which they are attached form a 5- to 7-membered carbocyclic ring; at least one chelate ligand compound of the formula (IIa), (IIb) or (IIc), wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are defined as above for formula (I), is suitable as photolatent catalyst formulation for polymerizing compounds, which are capable to crosslink in the presence of a Lewis acid. ##STR00001##

An inorganic porous substrate having a silyl group represented by (i) and (ii) and having characteristics (iii) to (v), an inorganic porous support derived from the inorganic porous substrate, and a nucleic acid production method using the inorganic porous support: (i) a silyl group (A): a silyl group represented by the formula (i-1); (ii) a silyl group (B): at least one silyl group selected from the group consisting of silyl groups represented by (ii-1), (ii-2), and (ii-3); (iii) a particle diameter of 1 μm or more; (iv) a pore diameter of 20 nm or more; and (v) a cumulative pore volume in a pore diameter range of 40 nm to 1000 nm of more than 0.32 mL/g and 4 mL/g or less.

##STR00001##