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.

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.

This invention relates to a surface-deactivated solid polyisocyanate and a thermally curable adhesive composition comprising the same, which are suitable for assembling articles of various substrates such as plastic materials. In particular, the present invention relates to a surface-deactivated solid polyisocyanate and a thermally curable adhesive composition comprising the same which is storage stable at room temperature, can be cured at a temperature lower than 100 C. and meanwhile have excellent adhesion and mechanical properties when cured.

Polyol blends, isocyanate-reactive compositions, polyurethane foam-forming compositions, methods of producing polyurethane foams, polyurethane foams produced from such compositions and made by such methods. The polyol blends, isocyanate-reactive compositions and polyurethane foam-forming compositions include an isopropylidenediphenol-based polyether polyol in combination with another polyol.

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: HOCOO.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.

The scope of this invention is to disclose the method of foaming a superior impact mitigation material, namely semi-closed cell hybrid polyurea foam, using scalable manufacturing process that is geometry-independent and allows for greater control of the resulting foam properties. while the process discussed herein, can be easily used to make complex geometries (e.g., padding foam for helmets, outsoles for walking and running shoes, body armors or other protection applications.

A two-component polyurethane composition includes a first component, including at least one polybutadiene polyol P1 having an average molecular weight of 2,000 to 10,000 g/mol and an average OH functionality of 2.1 to 4, and a second component, including at least one polyisocyanate and optionally at least one isocyanate-terminated polyurethane prepolymer. The composition also contains at least one hydrophobic diol P2 having an average molecular weight of 500 to 5,000 g/mol, selected from polybutadiene diols, polyester diols, polycarbonate diols, polyether diols having a repeat unit having at least 4 C atoms, and/or at least one hydrophobic compound P3, which is terminated with amino groups and has an average molecular weight in the range of 200 to 2,000 g/mol. The ratio of the number of hydroxyl groups from P1 to the number of hydroxyl and primary and secondary amino groups from P2 and P3 is 2:1 to 16:1.

The invention relates to PUR rigid foams which can be obtained by reacting an organic polyisocyanate component B) in a specified viscosity range with a hydrogen-containing component A) which is reactive to isocyanate groups, at least containing a polyol component, water, and optionally stabilizers, catalysts, and other auxiliary agents and additives, in the presence of suitable propellants and to a method for producing same, having the steps of a) providing a mold, b) introducing the foam-forming reaction mixture of component A), the polyisocyanate component B), and propellants T) into the mold, and c) foaming the reaction mixture.

Provided herein is a process for preparing a rigid polyisocyanurate foam including reacting a composition (A) including a polyesterol, a blowing agent including formic acid, a catalyst system including at least one trimerization catalyst and at least one polyisocyanate as component (B), wherein composition (A) further includes at least one polyether alcohol prepared by addition of alkylene oxides to toluenediamine. Further provided herein is a rigid polyisocyanurate foam obtained through the process described herein and the use of said rigid polyisocyanurate foam as insulating material.

The invention relates to compositions comprising at least one first and one second component; the first component K1 comprising at least one di(aminobenzoate) ester A1 of formula (I) with an average molecular weight of 500 g/mol to 2000 g/mol, preferably 600 g/mol to 1500 g/mol and particularly preferred between 650 g/mol and 1300 g/mol, G being a divalent group derived from poly(tetramethylene oxide) diol, and the second component K2 comprising at least one aromatic polyisocyanate B1 with an average molecular weight of 160 g/mol to 1100 g/mol, preferably 500 g/mol to 800 g/mol.