A urea resin composition capable of providing a polyurea foam exhibiting excellent flame retardancy and shape retention during combustion, capable of suppressing deterioration over time in a wet-heat environment, exhibiting excellent adhesion to an adherend during coating, being hardly cracked even if flame contact occurs, and hardly allowing carbonization to proceed to a deep portion of the foam. A urea resin composition comprising a polyisocyanate compound (A), a polyamine compound (B), a trimerization catalyst, a foaming agent, a foam stabilizer, and a flame retardant.

Provided are a modified polyether polyol and the use thereof in polyurethane foam materials. The method for preparing a modified polyether polyol comprises the following steps: 1) reacting a compound A with a polyether polyol, wherein the compound A is an anhydride and/or dicarboxylic acid compound containing a polymerizable double bond, preferably selected from one or two of maleic anhydride and itaconic anhydride, preferably maleic anhydride; and 2) reacting the product obtained in step 1) with an epoxy compound containing a polymerizable double bond in the presence of a catalyst, in order to prepare the modified polyether polyol. The modified polyether polyol obtained by means of the preparation method has more active sites, uses the polymerizable double bond for blocking, is used as a dispersion stabilizer for the synthesis of copolymer polyols, and has the characteristics of a better dispersion stability, filterability and a low viscosity.

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.

Described herein is a method for producing a PU foam insole, including the following steps of: (1) pouring the raw materials used to form a PU foam into a mould, reacting to obtain a PU sheet, where the height of the mould cavity is from about 1.0 to about 1.6 times of the total thickness of two finished insoles; (2) splitting the PU sheet into two halves in the horizontal direction to obtain two pieces of PU insole material, where one surface of the material has open pores, and the other surface of the material has a skin; and (3) attaching a piece of fabric onto the surface having open pores of the material obtained in step (2). Also described herein is a PU foam insole produced by the method.

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.

Environmentally friendly, sustainable, and high-performance ultralight composite foams are disclosed. The composite foams are prepared from cellulose nanomaterial, polymeric material, and a crosslinking agent. The fabrication process is simple and uses only water. The composite foams exhibit an elastic strain exceeding the values reported for known nanocellulose-based foams with no reinforcement. The foams exhibit a thermal conductivity superior to that of traditional insulating materials and retain structural integrity after burning.

A composition is disclosed, which comprises (A) an organohydrogensiloxane having cyclic siloxane moieties including silicon-bonded hydrogen atoms. The composition further comprises (B) a polyether compound having an aliphatically unsaturated group. Finally, the composition comprises (C) a hydrosilylation catalyst. A silicone polyether surfactant prepared by reacting components (A) and (B) in the presence of component (C) is also disclosed. In addition, an isocyanate-reactive component comprising a polyol and the silicone polyether surfactant is disclosed. A composition comprising the isocyanate-reactive component, an isocyanate component comprising a polyisocyanate, and a catalyst is further disclosed. Finally, a method of preparing an article comprising a polyurethane and/or polyisocyanurate foam, and an article formed from the composition and/or the method, are disclosed.

A process can be used for producing (rigid) particle foams from polymer compositions containing at least one polymer having a glass transition temperature according to ISO 11357-2 of at least 180° C. with an underwater pelletization system.

The present invention provides a modified formula to make a hydrophilic foam. In some embodiments this modified formula adds a filler which causes the foam to become less absorptive, which has the benefit of making available to the skin more makeup or other products, while also providing a superior esthetic application of makeup on the skin. In other embodiments the modified formula makes the hydrophilic foam easier to clean and reduces the staining propensity of the foam. In other embodiments the modified formula uses an additive to the properties or usability of the foam in some way. Providing the filler and additive can be done in combination or separately depending on the desired benefits or properties of the foam. In some embodiments the foam is fashioned into a shape suitable for makeup application.

A method of forming a polymeric vacuum insulation board is provided, the polymeric vacuum insulation board including a plurality of evacuated, closed-cell pores therein. In one embodiment, the method includes intermixing a polymer with zeolite particles that contain water and extruding the resulting composition under high pressure. During extrusion, water in the zeolite particles evaporates and creates a porous, closed-cell microstructure within a polymer matrix. As the polymer matrix cools and solidifies, water vapor is reabsorbed by the zeolite, which at least partially evacuates the closed-cell pores. In another embodiment, the method includes intermixing a polymer with expandable graphite particles and extruding the resulting composition under high pressure. During extrusion, the expandable graphite particles define evacuated voids. The polymer binder can be selected to include low gas permeance, for example ethylene vinyl alcohol (EvOH) or polyvinylidene chloride (PVDC). In some applications, the polymer can be blended with nano-clays or other additives to further decrease the gas permeance of the vacuum insulation board.