Polyurethane/polyisocyanurate foam insulation described herein is derived from a composition that contains an organic polyisocyanate, an isocyanate reactive material containing at least about 20% by weight, based on the total weight of the composition, of an aromatic polyester polyol, a hydrocarbon blowing agent, a first catalyst selected from the group consisting of a carboxylate salt of an alkali metal, a carboxylate salt of an alkaline earth metal, a carboxylate salt of a quaternary ammonium, and combinations thereof, and a second catalyst comprising a non-reactive tertiary amine, wherein a molar ratio of the first catalyst to the second catalyst is less than about 1.25, the composition gels quickly, and the composition has an isocyanate index greater than about 175. Such an insulating foam has a ratio of thermal conductivity at 75 F. to thermal conductivity at 25 F. between about 0.98 and about 1.10.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both of one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250 F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

To provide a biaxially oriented polyamide film, even as a product that is close to an end of a mill roll, having favorable mechanical characteristics, thermal characteristics, and few S-shape curling due to moisture absorption after being made into a bag. A biaxially oriented polyamide film formed of a polyamide resin containing not lower than 60% by mass of polyamide 6, wherein a molecular orientation angle of the film is not smaller than 20?, a strain at moisture absorption of the film is not higher than 1.3%, an impact strength of the film is not lower than 0.8 J/15 ?m, and a heat shrinkage rate, after heating for ten minutes at 160? C., of the film is 0.6 to 3.0% in both an MD direction and a TD direction.

Disclosed is a polyurethane foam formulation based on conventional polyether and polyester polyols based on renewable raw materials, with in particular MDI, for the production of preferably viscoelastic PUR moulded foams and sound insulations with foams based thereon.

The present invention provides a moisture-curable hot melt urethane composition, including a hot melt urethane prepolymer (A) having an isocyanate group and a foaming agent composition (B) containing N,N-dinitrosopentamethylenetetramine (b1), urea (b2) and a polyol (b3). The present invention also provides a method for producing a foamed and cured product of a moisture-curable hot melt composition, which includes heat-melting a hot melt urethane prepolymer (A), then mixing the foaming agent composition (B) therewith, applying the resultant mixture to a substrate, and performing a heating treatment at a temperature equal to or higher than heat-melting temperature of the (A) to thereby cause foaming and curing. An object of the present invention is to provide a solvent-free foaming system, according to which a foamed and cured product with excellent texture can be obtained, and an excellent foamed state can be maintained even in a thin film.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both of one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250 F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both of one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250 F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

Thermoplastic polymer compositions having enhanced properties, as well as methods of making and using the same, are provided. Thermoplastic polymers according to some aspects of the present invention may be rigid, but may also be suitable for use in applications requiring a thermoplastic polymer resin. Thermoplastic polymers according to various aspects of the present invention may be useful in preparing shaped articles such as, for example, sheets, films, tubes, preforms, bottles, profiles, and other similar articles.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both of one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250 F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

The present invention provides a polyurethane foam and a manufacturing method therefor, the polyurethane foam being a reaction product of a polyester polyol and an isocyanate and having a flame retardancy index (FRI) of 130 or less, wherein the polyester polyol is formed from a composition comprising an alcohol and two or more types of aromatic carboxylic acid including isophthalic acid and phthalic acid. The polyurethane foam can have both improved flame retardancy and heat resistance, and has total heat release and total smoke release that are significantly lower than those of a conventional polyurethane foam, and thus has an excellent fire protection effect when used as an interior material for buildings and low toxic gas generation.