The invention relates to a method for producing flexible polyurethane foam, flexible polyurethane foam produced by the method, and its use in household articles and automobile articles.

The invention relates to a composition for preparing a flexible foam and its application. The composition comprises the following components: a. an isocyanate mixture; b. a polymer polyol mixture; c. an isocyanate-reactive group-containing compound having a number average molecular weight of 32-400 g/mol; d. an aqueous alkali metal salt and/or ammonium bicarbonate solution, having a concentration of greater than or equal to 1.5 wt % and less than 30 wt %, and a pH value of less than 9.5; and e. a metal catalyst; wherein the amount of the tertiary amine catalyst in the composition is not more than 0.1 wt %, and the isocyanate index of the composition is 70-120. The composition has a high reaction efficiency and can meet the quantitative production requirements of the textile industry. The flexible foam prepared from the composition has a good phenolic yellowing resistance, and can meet the comprehensive requirements of the textile industry for a high rebound resilience, a good gas permeability, a ultraviolet yellowing resistance and the like of the foam.

This invention generally provides composition for making a polyurethane foam with reduced aldehyde emission and more specially to composition useful in means of transport such as interior part of cars, wherein composition is comprising: (a) a polyfunctional isocyanate; (b) an isocyanate reactive composition; and (c) a compound of the formula (I) or (II), wherein the compound (c) is present by weight percentage in the composition in an amount ranging from about 0.001 to about 10, preferably from about 0.01 to about 5, and more preferably from about 0.05 to about 2 based on the total weight of the composition. The compositions can reduce aldehyde emission, especially acetaldehyde emission in the PU foam and has no obvious influence on the mechanic properties of the foam.

A method of producing a polyurethane or polyisocyanurate foam is provided which involves the use of a specific combination of hydrofluoroolefin blowing agents and cell nucleators. The resulting foams have excellent long term thermal insulating performance and have reduced thickness in comparison to conventional thermal insulating boards. The rigid polyurethane and polyisocyanurate boards may be used to insulate refrigeration bodies, such as those employed in vehicles comprising refrigeration units, and cold storage containers.

The present invention relates to a process for preparing polyoxyalkylene polyester polyols by reacting a starter compound having Zerewitinoff-active H atoms, a cyclic dicarboxylic acid anhydride and a fatty acid ester with an alkylene oxide in the presence of a basic catalyst. The invention further relates to polyoxyalkylene polyester polyols resulting from the method and to a preparation method for polyurethanes by reaction of the polyoxyalkylene polyester polyols according to the invention.

Disclosed are low-viscosity foamable polyurethane-forming compositions containing a polyol composition having monomeric and higher polyol components and optionally a polyhydroxylated aromatic compound; a polyisocyanate or latent polyisocyanate component or a combination thereof; a blowing agent; and optionally a cyclic carbonate having one or more hydroxyl groups. The monomeric and higher polyols each contain three or more hydroxyl groups, the higher polyol containing residues of the monomeric polyol and optionally residues of the polyhydroxylated aromatic compound, the residues being linked by one or more carbonate and/or ether groups. The Disclosed foamable polyurethane-forming compositions may contain the polyol compositions disclosed; an isocyanate functional component; and a blowing agent. The foamable compositions afford high strength, heat-resistant, low to moderate density foamed-polyurethane compositions useful in a variety of applications including construction, vehicle and packaging applications.

The present invention provides a composition which is capable of forming a polyurethane foam having a high hardness and excellent sound absorption properties. [Solution] The present invention relates to a composition for forming polyurethane foam characterized in that the composition for forming polyurethane foam comprises a polyol, a polyisocyanate, and a catalyst, in which the polyol comprises a polyol (A) having a number average molecular weight of 1500 to 8000 g/mol, the catalyst comprises a trimerization catalyst, in which the polyurethane foam has an air permeability of not less than 0.1 L/sec.

A thermoplastic polyurethane (TPU) foam product with high flatness, and a preparation method and a use thereof are provided. The TPU foam product is prepared by processing aliphatic thermoplastic polyurethane (ATPU) beads with a melting range of 20° C. to 50° C. and a melting point of 90° C. to 160° C. by a physical gas foaming process to obtain foamed ATPU beads and heating the foamed ATPU beads with a heat source to make the foamed ATPU beads fused. The TPU foam product with high flatness has a density of 0.08 g/cm.sup.3 to 0.8 g/cm.sup.3 and a flatness value of less than 2 mm, and the flatness value is determined by a fixed-length ruler. The TPU foam product not only has high flatness such that diversified designs are allowed for a surface of the product, but also has high resilience.

The invention relates to a catalyst component for isocyanate modification, comprising at least one cyclic ammonium salt having a cation of the formula I wherein Y is a linear or branched C.sub.2-C.sub.20 segment which is substituted by a hydroxyl group in the 2 position to the charge-bearing nitrogen atom and optionally bears further substituents and is optionally interrupted by heteroatoms from the group of oxygen, sulfur, nitrogen and aromatic rings and optionally has further rings, and the N-bonded substituents R.sup.1 and R.sup.2 are either independently identical or different, substituted or unsubstituted, optionally branched, aliphatic C.sub.1-C.sub.20 radicals, aromatic C.sub.6-C.sub.20 radical or araliphatic C.sub.7-C.sub.20 radicals or the N-bonded substituents R.sup.1 and R.sup.2 form a ring segment X with one another for which the same or different definition given above for Y is applicable, with the proviso that X has a hydroxyl group as substituent in the 2 position to the charge-bearing nitrogen atom or does not have a hydroxyl group as substituent in the 2 position to the charge-bearing nitrogen atom.

A polyisocyanurate and/or polyurethane (PIR/PUR) comprising material having improved Flame, Smoke and/or Toxicity (FST) retardancy is disclosed and a method for forming said PIR/PUR comprising material. The PIR/PUR material is comprising at least 0.2 wt % of compounds having a number average equivalent weight <160 g/mol and at least one non-polymerized ethylenically unsaturated moiety based on the total weight of the PIR/PUR comprising material, and optionally 0.01 wt % up to 1 wt % of one or more radical initiator compounds based on the total weight of the PIR/PUR comprising material.