The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, rigid polyurethane foams and rigid polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.

There is provided herein a polyurethane foam-forming composition comprising a hydroxyl-functional phosphonate of the general formula (I): wherein R.sup.1-R.sup.4 are as described herein. There is also provided a polyurethane comprising the reaction product of the polyurethane foam-forming composition and a process of making a laminated polyurethane comprising laminating a textile to a polyurethane, preferably a polyurethane foam.

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An aqueous non-foamed functional composition formulation is disposed on a foamed opacifying layer in light-blocking, foamed opacifying elements. This non-foamed functional composition formulation has 0.5-15% solids and essential (i) and (iv) components and optional (ii), (v), (vi), and (vii) components. The components (i) untreated synthetic silica (fumed silica or precipitated silica) at 0.5-10 weight %; and a (iv) water-soluble or water-dispersible organic polymeric binder having a glass transition temperature (T.sub.g) below 25? C. The weight ratio of the (i) untreated synthetic silica to the (iv) water-soluble or water-dispersible organic polymeric binder is 10:1 to 1:1. The optional components include: a (ii) solid or non-solid lubricant; a (v) crosslinking agent; a (vi) thickener; and a (vii) coating aid. Glass particles can also be present. The presence of the (i) untreated synthetic silica provides improved brightness, e.g. an L* value of at least 80, and uniform coatings in the resulting, foamed opacifying element.

A flexible gastight material for a landfill site includes a component A and a component B, the component A including: at least one of polypropylene glycol with a molecular weight of 600-4000, polytetrahydrofuran diol with a molecular weight of 1000-3000, polycaprolactone diol with a molecular weight of 1000-3000, and polycarbonate diol with a molecular weight of 1000-3000; and at least one of 2,4-diphenylmethane diisocyanate, 4,4-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate. The flexible gastight material for the landfill site provided in the present application has a micro-closed-cell foam structure. The closed-cell elastic structure of the flexible gastight material may block the volatilization of toxic and harmful odors, and may cut off the diffusion path of the odors by combining with gas treatment systems at the landfill site. The flexible gastight material has excellent water blocking and gas sealing performance.

The present disclosure relates to pyrrolidine-based catalysts for use in a polyurethane formulation. The polyurethane formulation includes the pyrrolidine-based catalyst, a compound containing an isocyanate functional group, an active hydrogen-containing compound. The use of such catalysts produces high quality polyurethane foam while reducing environmental concerns that can arise during the production of polyurethane foam as well as in the foam that is produced.

An intumescent coating composition comprising an epoxy resin binder, an epoxy reactive diluent, a curing agent and an acid catalyst, wherein the curing agent is comprised of a mixture of polyamide, polyetheramine and an amine functional monomer and wherein the acid catalyst is effective to forma phosphoric acid on thermal decomposition and wherein the coating composition has a viscosity of between 20,000 and 140,000 mPa/s at 20 C. and shear rate 1.5 s.sup.1. The invention also extends to a coated substrate, coated on at least a portion thereof with said intumescent coating composition.

Disclosed herein is a highly flame retardant polyurethane spray foam composition. The composition includes 100 parts by weight to 200 parts by weight an isocyanate compound relative to 100 parts by weight of a resin mixture including 46 wt % to 75 wt % of a polyol, 10 wt % to 30 wt % of a blowing agent, and 5 wt % to 30 wt % of an additive, wherein the polyol includes 1 wt % to 10 wt % of a polyether polyol and 45 wt % to 65 wt % of an aromatic polyester polyol, and the aromatic polyester polyol has an average hydroxyl value of 250 mgKOH/g to 380 mgKOH/g.

Disclosed are a PVC foam processing aid, a method for preparing the same, and a polyvinyl chloride resin composition comprising the same. More specifically, provided are a PVC foam processing aid and a polyvinyl chloride resin composition exhibiting superior aggregation property and improving foam moldability of polyvinyl chloride (PVC) resins, prepared therefrom.

Described herein are fire-resistant one-component polyurethane spray foam compositions. Also described herein are methods of making and using fire-resistant one-component polyurethane spray foam compositions. Also described herein are dispensers for dispensing the fire-resistant one-component polyurethane spray foam compositions. Compositions and methods in accordance with the present disclosure are useful in a wide variety of applications, and particularly useful in meeting building codes for construction applications.

The present disclosure relates to pyrrolidine-based catalysts for use in a polyurethane formulation. The polyurethane formulation includes the pyrrolidine-based catalyst, a compound containing an isocyanate functional group, an active hydrogen-containing compound. The use of such catalysts produces high quality polyurethane foam while reducing environmental concerns that can arise during the production of polyurethane foam as well as in in the foam that is produced.