The invention relates to a stabilized resol resin comprising water, a water-soluble amino phenol resin and a water-soluble aromatic polyol, as a solubilizer for the water-soluble amino phenol resin. The invention also relates to a diluted aqueous binder composition containing such a stabilized resol resin and additives, and to a method for producing a fibrous insulation product using such an aqueous binder composition.

Hydrofluoroolefin (“HFO”)-containing isocyanate-reactive compositions, foam-forming compositions containing such isocyanate-reactive compositions, rigid foams made using such foam-forming compositions, and methods for producing such foams, including use of such foams as panel insulation. The isocyanate-reactive compositions include a polyol composition, a blowing agent composition, and a catalyst composition. The polyol composition includes 50% to 80% by weight, based on total weight of the polyol composition, of an aromatic polyester polyol having a functionality of 1.5 to 2.5 and an OH number of 150 to 360 mg KOH/g, and an amine-initiated polyether polyol having an OH number of more than 500 mg KOH/g and a functionality of 2.5 to 4. The blowing agent composition includes a hydrofluoroolefin and water. The catalyst composition includes a morpholine, an imidazole, a quaternary ammonium carboxylate, and a metal carboxylate.

Provided is a resin composition comprises a cyanate ester compound (A), an amine adduct compound (B) and a borate ester (C).

A resin composition capable of improving or minimizing a load applied to injection equipment, such as a nozzle, when injected by the equipment is provided. The resin composition includes a thermally conductive filler capable of exhibiting a desired thermal conductivity.

A process for preparing a porous material involves at least the steps of providing a mixture (I) containing a composition (A), which contains components suitable to from an organic gel, and a solvent (B); reacting the components in the composition (A) in the presence of the solvent (B) to form a gel; and drying of the gel. The composition (A) contains a catalyst system (CS), which contains at least a catalyst component (C1) selected from ammonium salts and phosphonium salts, and an acid with a phosphor containing acid group as a catalyst component (C2). Porous materials can be obtained in this way and the porous materials can be used as thermal insulation material and in vacuum insulation panels and vacuum insulation systems, in particular in interior or exterior thermal insulation systems as well as for insulation of refrigerators and freezers and in water tank or ice maker insulation systems.

The invention relates to flame-proofed polyurethane hard foam material or polyurethane/polyisocyanurate hard foam material (designated below individually or jointly also as “PUR/PIR hard foam material”) comprising phosphinates (also hypophosphite), and to a method for producing PUR/PIR hard foam materials through the implementation of a reaction mixture containing A1 an isocyanate-reactive component, A2 propellant, A3 catalyst, A4 optionally additive, A5 flame-proofing agent, B an isocyanate component, characterised in that the flame-proofing agent A5 contains a phosphine according to the formula (I)M[(R).sub.2PO.sub.2].sub.n, where R=in each case stands for H, C1- to C4-(hydroxy-)alkyl group or benzyl group, M=an element of the main groups 1 to 3, wherein hydrogen is excepted, and n=the number of the main group of M, and the proportion of the phosphine according to the formula (I) is 0.1 to 15 wt %, based on the total mass of components A1 to A5.

The present invention relates to a preparation of a block of fiber-reinforced polyurethane/polyisocyanurate foam in which the expansion of the foam is constrained by the walls of a double belt laminator forming a tunnel, the block of fiber-reinforced polyurethane/polyisocyanurate foam being composed of cells storing a gas, advantageously having low thermal conductivity, and exhibiting a density of less than 50 kg.m.sup.−3 with a content of fibers C.sub.f representing at least 4% by weight of the block of fiber-reinforced foam, in which the impregnation time of the fibers t.sub.i is less than the cream time t.sub.c of the polyurethane/polyisocyanurate foam.

A composite article and a method for insulating an appliance are disclosed. In general, the appliance is selected from the group of major, domestic or household appliances (e.g. ovens, stoves, ranges, etc.). The appliance has a first surface that defines a heating cavity, and a second surface opposite the first surface. The composite article comprises a backing layer spaced from the first surface, and an insulating layer sandwiched between the second surface and the backing layer. The insulating layer reduces heat transfer from the heating cavity to the backing layer (e.g. during use of the appliance). The insulating layer comprises a foamed silicone. The foamed silicone can be one formed via a hydrosilylation-curable silicone composition, a condensation-curable silicone composition, or a combination thereof. The insulating layer may comprise a foamed room-temperature-vulcanizing (RTV) silicone. The backing layer comprises a foamed polyurethane (PUR), a foamed polyisocyanurate (PIR), or a foamed PUR/PIR hybrid.

The invention relates to flame-proofed polyurethane hard foam material or polyurethane/polyisocyanurate hard foam material (designated below individually or jointly also as “PUR/PIR hard foam material”) comprising phosphinates (also hypophosphite), and to a method for producing PUR/PIR hard foam materials through the implementation of a reaction mixture containing A1 an isocyanate-reactive component, A2 propellant, A3 catalyst, A4 optionally additive, A5 flame-proofing agent, B an isocyanate component, characterised in that the flame-proofing agent A5 contains a phosphine according to the formula (I)M[(R).sub.2PO.sub.2].sub.n, where R=in each case stands for H, C1- to C4-(hydroxy-)alkyl group or benzyl group, M=an element of the main groups 1 to 3, wherein hydrogen is excepted, and n=the number of the main group of M, and the proportion of the phosphine according to the formula (I) is 0.1 to 15 wt %, based on the total mass of components A1 to A5.

A process is useful for producing a rigid polyurethane foam, also referred to as rigid PU foam, via mixing of three streams, rigid PU foams that are obtained by that process, and the use thereof as an insulation material.