The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to polyurethane and polyisocyanurate foams having an open-cell, closed-cell or a combination of open and closed cell structure, and methods for their preparation. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol and a catalyst which is an adduct of an amine and an organic acid.

The present invention relates to a process for preparing a porous material, at least comprising the steps of providing a mixture (I) comprising a composition (A) at least comprising an isocyanate composition (A*) comprising a polymeric polyfunctional isocyanate as component (ai), a monomeric polyfunctional isocyanate as component (aii), at least one catalyst as component (ac), wherein composition (A) is substantially free of aromatic amines, and a solvent (B), reacting the components in the composition (A) obtaining an organic gel, and drying of the gel obtained in step b). The invention further relates to the porous materials which can be obtained in this way and the use of the porous materials as thermal insulation material and in vacuum insulation panels.

A formulation system contains: (a) a pre-polymer reaction product of a polymeric isocyanate and a polyether polyol, where: (i) the polymeric isocyanate contains five weight-percent or more methylene diphenyl diisocyanate; (ii) the polymeric isocyanate has a functionality of 3.0 or less; (iii) the polyether polyol is present in the pre-polymer at a concentration of one to 25 weight-percent; (iv) the polyol has an equivalent weight of 50 to 500 grams per equivalent; (v) the NCO concentration of the pre-polymer is 15 to 31 weight-percent; (vi) the pre-polymer is free of isocyanate trimers; (b) a polyester polyol component containing 10 to 25 weight-percent of free glycol; and (c) a blowing agent that contains less than five weight-percent water; where the ratio of pre-polymer and polyester result in foam having a trimer content of 12 to 22 weight-percent, and an NCO index of more than 300 and less than 700.

An object is to provide a (meth)acrylamide based urethane oligomer which has excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, a high curing property with an active energy ray, and a low curing shrinkage property, and to provide an active energy ray curable resin composition containing the same which has an excellent adhesion property, moisture resistance, surface curing property, and also a low curing shrinkage property, and a molded article of the same. By using a (meth)acrylamide based urethane oligomer characterized by having a (meth)acrylamide group at the end or in side chain thereof and a cure shrinkage rate of 5% or less, it is possible to prepare a urethane oligomer having high curing property and excellent compatibility with organic solvents and general purpose acrylic monomers and oligomers, and an active energy ray curable resin composition containing the same and having excellent adhesion property can be prepared.

The invention described herein generally pertains to a composition and a method for improving the shelf life of a gaseous hydrofluoroolefin propellant, the improvement comprising at least the increased aromatic polyester polyol(s) in combination with a tertiary amine catalyst comprising at least two cyclohexyl rings and an aliphatic metal salt catalyst, the amine catalyst having less than 10% nitrogen on a weight basis.

A curable composition for making polyisocyanurate comprising products obtained by combining and mixing at an isocyanate index of at least 100 at least a polyisocyanate composition, a polytetrahydrofuran polyol (P-THF) having average molecular weight in range 1000-5000 g/mol as toughening agent and diols having an average molecular weight <1000 g/mol.

A polyisocyanurate-based coating for offshore applications is provided. The coating is a syntactic coating, obtainable by reacting a polyisocyanate compound with a compound containing isocyanate-reactive hydrogen atoms in the presence of a trimerisation catalyst and hollow objects, at an isocyanate index of at least and preferably more than 2000.

Catalyst compositions useful in the production of insulating polyurethane or polyisocyanurate foam are disclosed. The catalyst compositions impart increased stability of a mixture of the catalyst, a halogen-containing blowing agent, and a polyol. These catalyst compositions include amine/acid salts with a pH of <7.0 which can be used in combined with tertiary amine catalysts and metal-based or ammonium-based trimerization catalyst and at least one metal-based gel catalyst and optionally one or more of an additional catalyst described in (1) or (2). These improved catalysts can be used with any halogenated blowing agent, and provide substantial stability benefits with the use of hydrofluoroolefins and hydrofluorochloroolefins. In an exemplary embodiment, a process includes providing a pre-mix comprising an organic carboxylic di-acid, tri-acid or poly-acid component and contacting a tetraalkylguanidine and/or a tertiary amine containing an isocyanate reactive group with the acid component in the pre-mix to form a mixture of tetraalkylguanidine salt or tertiary amine salt or their combination.

The present invention provides for the use of nitrogen compounds of formula (I) and/or of corresponding quaternized and/or protonated compounds for production of polyurethanes, compositions containing these compounds and polyurethane systems, especially polyurethane foams, which have been obtained using the compounds.

A synthetic polymer film (34A), (34B) having a surface which has a plurality of raised portions (34Ap), (34Bp), wherein a two-dimensional size of the plurality of raised portions (34Ap), (34Bp) is in a range of more than 20 nm and less than 500 nm when viewed in a normal direction of the synthetic polymer film (34A), (34B), the surface having a microbicidal effect, and a concentration of a total of a nitrogen element which is a constituent of a primary amine and a nitrogen element which is a constituent of a secondary amine is not less than 0.29 at %, and a number of moles of an ethylene oxide unit included in one gram is more than 0.0020 and not more than 0.0080.