A flexible polyurethane foam material with strong support and high elasticity is made by foaming the following raw materials by weight: 80-120 parts of lignin-based block copolymer molecular-level combined polyether; 45-65 parts of isocyanate; 0.5-5 parts of foaming catalyst; 1-10 parts of water; and 1-3 parts of foam stabilizer; the lignin-based block copolymer molecular-level combined polyether is based on lignosulfonate, molecular chain of lignosulfonate is cut and embedded by using solvation effect of polyether polyol to form a molecular-level combined polyether that is polymerized and formed by aromatic polymer fragments of lignosulfonate and aliphatic polymer fragments of polyether polyol. The foaming catalyst can be a foaming catalyst commonly used in the technical field.

HCFO-containing isocyanate-reactive compositions, foam-forming compositions containing such isocyanate-reactive compositions, rigid PUR-PIR foams made using such foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in discontinuous foam panel applications. The isocyanate-reactive composition includes a polyol blend, a blowing agent composition, and a tertiary amine catalyst. The polyol blend includes: (1) an aromatic polyester polyol having a functionality of 1.5 to less than 2.5 and an OH number of 150 to 360 mg KOH/g; (2) an aromatic polyester polyol having a functionality of at least 2.5 and an OH number greater than 360 mg KOH/g, which is present in an amount of at least 10% by weight, based on the total weight of the aromatic polyester polyol in the polyol blend; and (3) an amine-initiated polyether polyol having an OH number of at least 500 mg KOH/g and a functionality of 2.5 to 4. The blowing agent composition includes a hydrochlorofluoroolefin and a carbon dioxide generating chemical blowing agent.

A polyol composition for forming flexible polyurethane foam including a polyol component having a number average molecular weight of 2,500 or more, a catalyst, a foam stabilizer, a foaming agent, and a crosslinking agent, wherein water is contained as the foaming agent, wherein a sugar alcohol is contained as the crosslinking agent, wherein the content of the sugar alcohol with respect to 100 parts by mass of the polyol component is 0.1 to 5.0 parts by mass, and wherein no divalent tin catalyst is contained.

Embodiments relate to a porous polyurethane polishing pad for use in a chemical mechanical planarization (CMP) process of semiconductors and a process for producing the same. In the porous polyurethane polishing pad, it is possible to control the size and distribution of pores, whereby the polishing performance (i.e., polishing rate) of the polishing pad can be adjusted, by way of employing thermally expanded microcapsules as a solid phase foaming agent and an inert gas as a gas phase foaming agent.

Degradable polymers, including polyurethane and polyurethane-urea compositions, that can be used in aqueous, non-aqueous and dry hot environments as degradable polymers in oil, gas and other applications.

A polyamideimide resin having isocyanate groups at the terminals, wherein at least a portion of the isocyanate groups are blocked with an ether group-containing cyclic amine.

Biobased diisocyanates are bio-derived derived from biomass natural sources that include rosin acids. The biobased diisocyanates are of the formula 1, 2 or 3: ##STR00001##
where: R is an alkylene of from about 2 to about 12 carbon atoms, and R′ is an alkyl group of from about 1 to about 12 carbon atoms.

HCFO-containing isocyanate-reactive compositions, foam-forming compositions containing such isocyanate-reactive compositions, rigid PUR-PIR foams made using such foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in discontinuous foam panel applications. The isocyanate-reactive composition includes a polyol blend, a blowing agent composition, and a tertiary amine catalyst. The polyol blend includes: (1) an aromatic polyester polyol having a functionality of 1.5 to less than 2.5 and an OH number of 150 to 360 mg KOH/g; (2) an aromatic polyester polyol having a functionality of at least 2.5 and an OH number greater than 360 mg KOH/g, which is present in an amount of at least 10% by weight, based on the total weight of the aromatic polyester polyol in the polyol blend; and (3) an amine-initiated polyether polyol having an OH number of at least 500 mg KOH/g and a functionality of 2.5 to 4. The blowing agent composition includes a hydrochlorofluoroolefin and a carbon dioxide generating chemical blowing agent.

A difunctional biphenyl compounds corresponding to formula (I) ##STR00001##
wherein Alk, Alk′ and R are as defined in the description. These compounds are suitable as hardeners for thermosetting resins, especially epoxy resins.

Curable cyanoacrylate compositions are reported that comprise cyanoacrylate and a thermoplastic polyurethane (TPU) components. Such compositions are toughened cyanoacrylate compositions exhibiting long term viscosity stability when stored for prolonged periods at room temperature (25° C.). TPU components are reported having structural units in which at least one of the structural units has the formula —O—R.sup.1—O—Ar—O—R.sup.2—O—, wherein Ar is a C.sub.6-C.sub.20 aromatic group with at least one aromatic ring; R.sup.1 is a C.sub.2-C.sub.10 alkyl group; and R.sup.2 is a C.sub.2-C.sub.10 alkyl group. The thermoplastic polyurethane (TPU) component may be present in the curable cyanoacrylate composition from about 1 wt % to about 40 wt %, for example from about 2 wt % to about 30 wt %, such from about 3 wt % to about 20 wt %, suitably from about 5 wt % to about 10 wt %, based on the total weight of the composition.