The present invention relates to a method for preparing a rigid polyurethane foam using a non-continuous production process, the rigid polyurethane foam prepared therefrom, and use thereof.

Embodiments of the present disclosure are directed towards formulated polyol compositions that include a first polyether polyol having an average hydroxyl number from 112 to 280 mg KOH/g, a second polyether polyol having an average hydroxyl number from 18.5 to 51 mg KOH/g, a third polyether polyol having an average hydroxyl number from 20 to 70 mg KOH/g, and at least one of: fourth polyether polyol having an average hydroxyl number from 112 to 280 mg KOH/g; and a methoxypolyethylene glycol having an average hydroxyl number from 56 to 190 mg KOH/g.

Laminated parts are described that include a core, a fiber layer arranged on each side of the core and impregnated with a polyurethane resin, and an outer layer that at least partially coats at least one of the polyurethane impregnated fiber layers, in which the outer layer is the cured reaction product of a reaction mixture that includes: (1) a polyisocyanate, (2) a polyether polyol having a molecular weight of 800 Da to 25,000 Da and a functionality of 2 to 8, and (3) a fatty acid ester having isocyanate-reactive functionality. Methods of producing such laminated parts are also described.

A polyol component P) contains at least two different polyether polyols A) and C), and at least one polyether ester polyol D). A process can be used for producing rigid polyurethane foams using the polyol component P), and the rigid polyurethane foams produced therefrom are useful.

Disclosed is an adhesive agent set composed of a main agent and a hardening agent, in which the main agent contains a urethane prepolymer having isocyanate groups as terminal groups; and an oligomer of hexamethylene diisocyanate having an isocyanate group modified with a silane coupling agent having a mercapto group or an amino group, the oligomer also having at least two unmodified isocyanate groups, and the hardening agent contains a polyol.

Provided is a coating composition that can be suitably used even in a coating method different from conventional spray coating. A two-pack coating composition comprising a main resin comprising a hydroxyl group-containing component and a curing catalyst (C), and a hardener comprising an isocyanate compound (B), wherein the hydroxyl group-containing component comprises a polyol (A), the polyol (A) has a hydroxyl value of 200 mg KOH/g or more and 1900 mg KOH/g or less, a content of the curing catalyst (C) is in a range of from 0.05 parts by mass to 3 parts by mass based on 100 parts by mass of the hydroxyl group-containing component, and an amount of an organic solvent contained in the two-pack coating composition is 5 parts by mass or less based on 100 parts by mass of the two-pack coating composition.

In an adhesive selection method, test data is acquired by subjecting an adhesion complex, obtained by integrally bonding one material and an other material that are heterogeneous using an adhesive, to a shear test, in which a tensile shear load is applied to the adhesion complex in a direction that causes shear deformation in the adhesive, until adhesive failure takes place. Based on the test data, a plurality of two- or three-dimensional FEM analysis models of the adhesion complex with varied adhesives are constructed. On each of the analysis models, a simulation is performed in which a tensile shear load is applied. Based on the stresses and locations of the stresses generated in each of the analysis models in the course of the, the adhesive for binding one member made of the one material and the other member made of the other material is selected from among the adhesives.

The present invention aims to provide a polyol composition capable of producing a flexible polyurethane foam having excellent low resilience at room temperature and good breathability. The present invention provides a polyol composition (C) for producing flexible polyurethane foam, containing a polyester polyol (A) and a polyether polyol (B), wherein the followings (1) to (4) are satisfied: (1) the polyol composition (C) has an ester group concentration of 0.4 to 4.0 mmol/g based on the weight of the polyol composition (C); (2) the polyol composition (C) has an oxyethylene group unit content of 15 to 40 wt % based on the weight of the polyol composition (C); (3) the polyester polyol (A) includes a polyester polyol (A1) having two to four hydroxy groups in one molecule obtained by polymerization of a raw material containing a compound (a) having multiple hydroxyl groups and a polycarboxylic acid or acid anhydride of the polycarboxylic acid; and (4) the polyether polyol (B) includes an oxyethylene group-containing polyether polyol (B1).

Described herein is a process for producing a pipe insulated with polyurethane foam, where (a) isocyanates are mixed with (b) polyols, (c) blowing agent including at least one aliphatic, halogenated hydrocarbon compound (c1), made up of from 2 to 5 carbon atoms, at least one hydrogen atom and at least one fluorine and/or chlorine atom, where the compound (c1) includes at least one carbon-carbon double bond, (d) catalyst including N,N-dialkylbenzylamine, optionally (e) chain extenders and/or crosslinkers and optionally (f) auxiliaries and additives to give a reaction mixture, the reaction mixture is applied to a pipe for media and is allowed to cure to give the polyurethane foam. Also described herein is an insulated pipe obtained by such a process and a method of using such an insulated pipe as insulated composite wall pipe for district heating or district cooling networks laid in the ground.

A composition kit for preparing a polyurethane foam and a preparation method and applications thereof are provided. The composition kit for preparing a polyurethane foam includes a first component and a second component. The first component and the second component are disposed in different containers respectively. The first component includes an organic isocyanate and a low boiling point foaming agent. The second component includes a polyol composition, a high boiling point foaming agent, a composite catalyst, water, and a silicone oil.