A process is described for producing PU foams, especially rigid PU foams, based on foamable reaction mixtures containing polyisocyanates, compounds having reactive hydrogen atoms, blowing agents, foam stabilizers, and possibly further additives, wherein polymer particles are additionally used, the average particle size of the polymer particles being <100 μm, preferably <70 μm, especially 5 to 50 μm.

The present invention relates to polymerizable compositions which contain components that can be crosslinked both via isocyanurate bonds and by a radical reaction mechanism. The invention further relates to methods by way of which polymers can be produced from said compositions.

The invention pertains generally to a shelf-stable polyurethane HFO-blown two-component polyurethane foam composition which includes controlling the ratio of tin-containing catalyst(s) to potassium-containing catalyst(s).

Disclosed herein is a coating material system containing (A) at least one polyhydroxy group-containing compound, (B) at least one polyisocyanate-containing compound, and (C) at least one catalyst comprising lithium (Li) and bismuth (Bi) as metal components and where the molar ratio of lithium to bismuth is at least 7:1 [mol/mol], in which i) components (A), (B), and (C) are present separately from one another, or ii) are mixed wholly or at least partly with one another. Methods for producing and using the coating material system are also disclosed herein.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, at least one cyclic 1,3-diketone compound, at least one aminoalcohol or alkylhydroxylamine and an alkali metal, phosphonium or ammonium sulfite. Foams so produced emit low levels of formaldehyde, acetaldehyde, acrolein and propionaldehyde.

A polyol formulation for producing flameproof polyurethane/polyisocyanate rigid foams (referred to individually or jointly in the following as “PUR/PIR rigid foams”), containing a polyester polyol having an OH number ≤250 mg KOH/g, a functionality of 1.5 to 2.5 and a free glycol content with Mn<150 g/mol of <6 wt. %, a polyethylene glycol with an average molecular weight of <700 g/mol and an average functionality of <2.5 and specific polyethyleneglycol alkylphenyl ethers, and methods for producing PUR/PIR rigid foams using said polyol formulation and to the PUR/PIR rigid foams obtained thereby are provided.

Disclosed herein is a fiber composite material including: (a) a polyurethane obtained reaction of at least the components: (i) a polyisocyanate composition; and (ii) a polyol composition including at least 15% by weight of an at least trifunctional alcohol (ii.1), which exhibits at least two primary hydroxyl groups (ii.1); and (b) fibers which are at least partially embedded in the compact polyurethane.

Further disclosed herein are a process for producing a fiber composite material, a fiber composite material obtained by this process, and a method of using the fiber composite material for producing a pipe, in particular a conical pipe, a pipe connector, a pressure vessel, a storage tank, an insulator, a mast, a bar, a roller, a torsion shaft, a profile, a piece of sports equipment, a molded part, a cover, an automotive exterior part, a rope, a cable, an isogrid structure or a semi-finished textile product.

Disclosed is an organic amine salt foaming agent, that is, a composite polyurethane foaming agent, comprising: 1) hexafluorobutene; and 2) an alkanolamine salt mixture (MAA), the alkanolamine salt mixture (MAA) contains an organic amine salt compound having the following general formula (I): A.sup.n−[B.sup.m+].sub.p (I); wherein A.sup.n− is one or two or three selected from the following anions: (b) carbonate: CO.sub.3.sup.2−; (c) formate: HCOO.sup.−; (d) bicarbonate: HO—COO.sup.−. A polyurethane foaming method using carbon dioxide and an organic amine in combination is also disclosed, in which carbon dioxide is added to a polyurethane composition for foaming. A method for preparing an alkanolamine carbonate salt with low water content from ammonium carbonate and an epoxide is additionally disclosed, in which a liquid alkanolamine salt mixture is used as a dispersion medium or as a solvent for reaction raw material.

Disclosed are a protective coating composition for an electronic board and a method for preparing the same. The protective coating composition includes urethane-modified alkyd resins that can prevent poor grounding caused by low molecular weight siloxanes generated in a conventional silicone-type coating compositions and preventing performance degradation caused by tin whisker growth while lowering emissions of volatile organic compounds (VOCs).

Described herein are silane-based coating compositions, including a metal alkoxide catalyst as well as an acid-functional polymer. Also described herein is a method of coating substrates with the coating compositions and coated substrates obtained by said method. Further, described herein are multilayer coatings and substrates coated with said multilayer coatings.