A reinforcing sheet including one or more layers of a reinforcing material, and a thermosetting adhesive associated with the reinforcing material, wherein the thermosetting adhesive includes a curing agent, and an epoxy-modified dimerized fatty acid combined with an epoxy terminated polyurethane interpenetrating network.

The present invention relates to a method for producing a mixture comprising at least one compound having at least two hydroxy and/or amino groups made of a biomass material. The invention also relates to such a mixture and to the use thereof for producing a polymer such as for example a polyurethane foam.

Polyol premixes and thermally insulating rigid polyurethane foams, such as those that can be used as a thermal insulation medium in the construction of refrigerated storage devices, are disclosed. A polymer polyol having a OH number of greater than 260 mg KOH/g is utilized. The resulting polyurethane foams can exhibit improved thermal insulation properties without sacrificing other important physical and processing properties.

A foam molded article includes a main agent resin, a filler of greater than or equal to 15% by mass and less than or equal to 80% by mass, and a foaming agent of greater than or equal to 0.01% by mass and less than or equal to 10% by mass, and a foaming ratio caused by the foaming agent is greater than or equal to 1.1 times.

A rigid foam or composition allowing a rigid foam to be obtained made from polyurethane and/or polyisocyanurate. The rigid foam or composition includes polyols selected from polyester polyols and polyether polyols; the polyols include: 5 to 50% of a polyester polyol A by weight relative to the total weight of the polyols; and a polyol B selected from polyester polyols B and polyether polyols B. The polyester polyol A is of general formula Rx-Ry-Z-Ry′-Rx′ in which Z is a C3 to C8 alcohol sugar chosen from glycerol, sorbitol, erythritol, xylitol, araditol, ribitol, dulcitol, mannitol and volemitol. Ry and Ry′ are diesters of formula —OOC—Cn-COO— in which n is between 2 and 34, and Rx and Rx′ are identical or different C2 to C12 monoalcohols.

Low combustibility thermal insulation and methods of use and preparation thereof are described herein. The low combustibility thermal insulation may include a foam composite comprising a polymer material and a fire retardant component disposed in and/or adjacent to the polymer material; and a first controlled combustion layer adjacent to a first surface of the foam composite, wherein the foam composite and first controlled combustion layer are configured to control combustion of the insulation such that a total heat generated in a period of 10 minutes by the panel is equal to or less than 8 MJ/m.sup.2, as measured according to ISO 5660-1, and wherein a thermal conductivity of the insulation is equal to or less than 0.050 W/m K.

The present invention relates to a reaction mixture for manufacturing an inorganic-filler based closed-cell rigid polyurethane or polyisocyanurate (PU or PIR) containing foam having a calorific value below 6 MJ/kg, preferably below 4.5 MJ/kg, more preferably below 3 MJ/kg, measured according to EN ISO 1716, the reaction mixture comprising: At least one polyisocyanate-containing compound; At least one isocyanate-reactive compound; An inorganic filler composition; At least one physical blowing agent;

characterised in that said inorganic filler composition has bulk density higher than 2 g/cm.sup.3, preferably higher than 2.1 g/cm.sup.3, more preferably higher than 2.2 g/cm.sup.3, even more preferably higher than 2.4 g/cm.sup.3.

The invention relates to a method for preparing polyester polyols containing monools, and to their use, in particular for preparing polyurethane/polyisocyanurate rigid foams (also referred to hereafter as PUR/PIR rigid foams) with improved fire performance.

Reversibly cross-linkable foam is provided. The reversibly cross-linked foam includes a first polymeric material, at least one reversibly cross-linkable monomer polymerized with the first polymeric material, and at least one blowing agent. The reversibly cross-linkable co-polymeric foam is thermally stable at temperatures of at least 10 degrees higher than otherwise identical polymeric foam that does not include the reversibly cross-linkable agent polymerized with the first polymeric material.

A composition for preparing polyisocyanurate and polyurethane foams is provided, comprising A) a first isocyanate-reactive component comprising a bisphenol, B) a second isocyanate-reactive component different from the first isocyanate-reactive component, and C) a polyisocyanate component. A method for preparing the polyisocyanurate and polyurethane foams, and foams prepared thereby are also provided.