Provided is a polyether polycarbonate diol, wherein the ratio of the total number of terminal alkoxy groups and terminal aryloxy groups to the total number of all terminal groups is 0.20% or more and 7.5% or less. Controlling the ratio of the total number of terminal alkoxy groups and terminal aryloxy groups to the total number of all terminal groups included in the polyether polycarbonate diol to fall within the preferable range enables a polyurethane having an intended molecular weight to be produced while the occurrence of rapid polymerization reaction is reduced.

Embodiments of the present disclosure are directed towards hybrid foam formulations that include: an isocyanate-reactive composition, and a high-functionality crosslinker; an azo type radical initiator; and an isocyanate.

The invention relates to a process for preparing a flame-resistant polymer-modified polyol having a solids content of 1 to 65 wt. % wherein (i) at least one polyisocyanate and (ii) an olamine are reacted in (iii) a base polyol having at least two active hydrogen containing groups of which more than 50% are primary active hydrogen containing groups and wherein the olamine has at least one phosphonic ester group attached to a tertiary nitrogen atom and contains at least two hydroxyl groups. The invention further relates to a flame-resistant polymer-modified polyol obtainable with the process of the invention, to a process for preparing optionally foamed plastics using the polymer-modified polyol of the invention, and to the use of a polymer-modified polyol for the preparation of flexible polyurethane foams.

The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.

Fossil-fuel and rubber-derived waste stream conversion to composite lumber substitutes or barrier members; the composites having material properties and uses of greater value than the solid waste stream components separately or together. Preferred combinations including waste materials derived from waste carpet, waste tires, and waste bituminous roofing shingles, all enormous problems for landfill disposal. In a range of formulation ratios, when combined with a binder, new and marketable products are made from solid waste. Improved resistance to rot, to water, and to weathering is exhibited in synergy with improved compressive and flexural strength, enabling production of a wide variety of useful and environmentally-friendly structural products, for example. Product weight and strength can be engineered to suit and may be structural members for architectural, engineering or agricultural use. Advantageously, the new products themselves can be re-used—by an end-of-life process for making more new products, achieving the capacity to make and remake multigenerational products from solid wastes and to reduce loading of landfills. Production by profile extrusion and by RIM molding are described.

The present invention relates to a composition for forming an environmentally friendly polyurethane foam, the composition having improved storage stability, air permeability, and anti-oxidation characteristics and to a method for manufacturing a polyurethane foam and, more specifically, to an isocyanate pre-polymer prepared by reaction of a polyisocyanate and a polyol component comprising a bio-polyol, to a composition for forming an environmentally friendly polyurethane foam, the composition having improved storage stability, air permeability, and anti-oxidative characteristics by comprising the pre-polymer as one component, to a method for manufacturing a polyurethane foam using the same, and to an environmentally friendly polyurethane foam manufactured thereby.

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.

Polyol premixes are described that are suitable for use in the preparation of polyurethane foam-forming reaction mixtures. These foam-forming reaction mixtures can produce closed-celled polyurethane foams exhibit a low level of water absorption. Also described are various uses of such reaction mixtures, including injecting the reaction mixture beneath at least a portion of an earth-supported structure and allowing the polyurethane foam-forming reaction mixture to react and form a closed-celled, rigid polyurethane foam beneath the earth-supported structure.

The invention generally pertains to the use of polyurethane foam blown by at least one blowing agent having a boiling point at atmospheric pressure of between ˜−50° C. to less than ˜5° C., including miscible blends thereof, which passes all United States Coast Guard Title 33, Part 183 specifications wherein the buoyant force of the froth polyurethane or polyisocyanurate foam is not reduced more than 5% after exposure to being immersed in a fully saturated gasoline vapor atmosphere, in reference fuel B, in reference oil No. 2, and in a 5% solution of Na.sub.3PO.sub.4.