The present invention relates to preparations having improved efficacy as flame retardants, to the use thereof and to polyurethanes containing the preparations according to the invention.

Green, fast and easy evaporating organic solvent for use as a lubricant in the processing of polytetrafluoroethylene (PTFE) and expanded polytetrafluoroethylene (ePTFE) products and processes of using the solvents to fabricate the products are disclosed herein. The products can be used in the field of bio- and medical applications, such as for use in vascular grafts, cardiovascular and soft tissue patches, facial implants, surgical sutures, and endovascular prosthesis, and for any products known in the aerospace, electronics, fabrics, filtration, industrial and sealant arts.

A sprayable water blown low density polyurethane foam-forming formulation including: (A) an isocyanate component; (B) a polyol component, wherein the polyol component includes a surfactant composition; wherein the surfactant composition includes at least one phenol-free secondary alkyl alcohol ethoxylate, and wherein the at least one phenol-free secondary alkyl alcohol ethoxylate is at least one linear alkyl chain phenol-free secondary alcohol ethoxylate; and (C) water; a process for making the above sprayable water blown low density polyurethane foam-forming formulation; and a polyurethane foam made from the above sprayable water blown low density polyurethane foam-forming formulation.

Recovery time and/or airflow of flexible polyurethane foam is increased by including certain tackifiers in the foam formulation. The tackifiers are characterized in being incompatible with polyol or polyol mixture used to make the foam, having a viscosity of at least 10,000 centipoise at 25° C., having a glass transition temperature of at most 15° C. and being inert to other components of the foam formulation.

Methods of making molded foam articles. The methods include introducing steam into a mold simultaneous to filling the mold with foam particles. The method can be performed faster and with a lower ΔT than conventional molding processes, permitting faster turn-around to the production of subsequent molded articles. The molded articles produced by the method can have thicker side walls and improved foam particle fusion as compared to conventional molding processes.

A foamable, multi-component composition based on polyurea and/or polyurethane forms an insulation layer. The composition can be used for foaming openings, cable and pipe feedthroughs, and joints for the purpose of fire protection.

A reaction mixture and a process for making a polyisocyanurate comprising rigid foam having a density in the range 50-500 kg/m.sup.3 is disclosed, said process having a cream time >35 seconds and a snap cure behaviour.

The present disclosure relates to an expanded foam solution for forming a thermosetting expanded foam having excellent flame retardancy produced using the same. According to the present disclosure, nanoclay is mixed with a polyol-based compound using ultrasonic waves, an isocyanate-based compound is added, and a trimerization catalyst or an isocyanurate compound is mixed with the polyol-based compound so that an isocyanurate structure is formed.

Described herein is a polyurethane foam prepared with certain polytetrahydrofurans and optional polyether polyols. The polyurethane foam is characterized by low hardness increase at low temperature as compared with conventional polyurethane foam, and is suitable for use in products which can be exposed to low temperature such as snow boots.

Disclosed is a reaction mixture for the manufacturing of a polyurethane foam, which mixture can be obtained by reacting a polyfunctional isocyanate with an isocyanate-reactive compound, in the presence of a scavenger and at least one catalyst; and curing such reaction mixture enables providing a foam with reduced aldehyde emissions particularly useful in means of transport, such as interior part of cars.