A viscoelastic foam layer, comprising a polyurethane comprising: from about 15 weight parts to about 75 weight parts toluene diisocyanate (TDI) residues per 100 weight parts polyol residues; wherein the viscoelastic foam layer: has a density less than or equal to 2 pounds/cubic foot (0.032 g/cm.sup.3), has an air flow greater than or equal to 2.5 CFM (0.07 m.sup.3/min), has a recovery time greater than or equal to 4 seconds, has an indentation force deflection (IFD) less than or equal to 10 pounds/square foot (478.8 Pa), has a height loss less than or equal to 10% after prolonged compression of 90% of an original height. A method of making the viscoelastic foam layer. A body support article comprising the viscoelastic foam layer.

Storage-stable two-component polyurethane or polyisocyanurate spray foam compositions are disclosed, said compositions comprising: (a) an A-side component comprising one or more polyisocyanate and one or more blowing agent; and (b) a B-side component comprising one or more polyol and one or more blowing agent comprising pressurized gaseous carbon dioxide and one or more liquid blowing agent; wherein both the A-side component and the B-side component, separately, generate less than 300 ppm of fluoride ion after one week of aging at 50° C.

A composition for preparing polyisocyanurate and polyurethane foams is provided, comprising A) a first isocyanate-reactive component comprising a bisphenol, B) a second isocyanate-reactive component different from the first isocyanate-reactive component, and C) a polyisocyanate component. A method for preparing the polyisocyanurate and polyurethane foams, and foams prepared thereby are also provided.

A polyvinyl chloride composition for powder molding includes 100 parts by mass of a polyvinyl chloride, 120 parts by mass or more and 200 parts by mass or less of a polyester-based plasticizer, and 4 parts by mass or more and 23 parts by mass or less of an acrylic polymer. The polyvinyl chloride has an average particle diameter of 50 μm or more and 500 μm or less and an average degree of polymerization of 1,700 or more. The acrylic polymer contains 40 mass % or more and 95 mass % or less of a constitutional unit derived from methyl (meth)acrylate, and 5 mass % or more and 60 mass % or less of a constitutional unit derived from at least one (meth)acrylic ester selected from the group consisting of a (meth)acrylic ester of an aliphatic alcohol having two or more carbon atoms and a (meth)acrylic ester of an aromatic alcohol.

The present invention relates to a cleaning implement that includes a melamine-formaldehyde foam. The melamine-formaldehyde foam includes from about 0.1 to about 5 weight % of at least one linear polymer with a number average molecular weight M.sub.n in the range from 500 to 10,000 g/mol. Additionally the present invention encompasses processes for making and methods for cleaning hard surfaces with a cleaning implement according to the present invention.

Provided are a polyol composition in which hard caking does not occur when stored for a long period of time, and a polyurethane foam using the same.

The polyol composition comprises a polyol compound, a foaming agent, a filler, and a metal oxide fine particle, the foaming agent including a hydrofluoroolefin, and the metal oxide fine particle having a count number ratio of OH ions of a metal constituting the metal oxide fine particle with respect to a total count number of all ions measured using time-of-flight secondary ion mass spectrometry of 0.1 or less.

A process for producing a polyurethane or polyisocyanurate construction board, the process comprising: (i) providing an A-side reactant stream that includes an isocyanate-containing compound; (ii) providing a B-side reactant stream that includes a polyol, where the B-side reactant stream includes a blowing agent that includes a pentane and a blowing agent additive that has a Hansen Solubility Parameter (8t) that is greater than 17 MPa°′.sup.5; and (iii) mixing the A-side reactant stream with the B-side reactant stream to produce a reaction mixture.

A mixed liquid agent of the present invention comprises a polyol compound, a catalyst, a flame retardant, and an organic solvent. The flame retardant includes a solid flame retardant. The organic solvent has a vapor pressure at 20° C. of 0.1 MPaG or more. A viscosity at 1 rpm and 25° C. after the organic solvent has been volatilized is 4,000 mPa.Math.s or more and less than 250,000 mPa.Math.s.

The invention relates to a process used to produce open-cell and extremely fine-cell PUR/PIR rigid foams, said process using a polyol formulation comprising a specific isocyanate-reactive component, a catalyst component having zerewitinoff-active hydrogens and a cell-opener component.

Disclosed are azeotropic or azeotrope-like compositions containing Z-1,1,1,4,4,4-hexafluoro-2-butene and methyl perfluoropropyl ether. Also disclosed is process of using the azeotropic or azeotrope-like composition as blowing agents for preparing a thermoplastic or thermoset foam. Also disclosed is a process of using the azeotropic or azeotrope-like composition as a refrigerant for producing cooling or heating. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of using the azeotropic or azeotrope-like composition as propellants for producing an aerosol. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics.