Abstract: A process for preparing a dispersion of inorganic oxide particles in polyester polyol by mechanically mixing of the inorganic oxide particles at a temperature of more than 160° C. with a polyester polyol having an acid number in the range of from 0.05 to 1.5.

Abstract: Disclosed is a polyurethane foam formulation based on conventional polyether and polyester polyols based on renewable raw materials, with in particular MDI, for the production of preferably viscoelastic PUR moulded foams and sound insulations with foams based thereon.

Abstract: The present disclosure relates to compositions comprising Z-1,1,1,4,4,4-hexafluoro-2-butene and additional compounds that may be useful as refrigerants, heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, power cycle working fluids, extinguishing agents, and fire suppression agents in liquid or vapor form.

Abstract: The present disclosure relates to processes for the production of a polyurethane material, where (a) di- and/or polyisocyanates, (b) compounds which have hydrogen atoms reactive toward isocyanate groups and which do not include compounds having carbon-carbon double bonds, (c) compounds including at least one carbon-carbon double bond, (d) optionally catalyst that accelerates the urethane reaction, and (e) optionally other auxiliaries and additives are mixed to give a reaction mixture and the mixture is hardened at temperatures above 120° C. The present disclosure further relates to a polyurethane material obtainable by this process, and also to the use of the polyurethane material, in particular of a polyurethane fiber-composite material as structural components.

Abstract: The present invention relates to a polyvinyl alcohol hydrogel having an asymmetric pore size. the pore size of the upper surface of the polyvinyl alcohol hydrogel is 1-30 ?m, the pore size of lower surface thereof is 50-300 ?m, and the pore size of the hydrogel gradually increases from the upper surface to the lower surface. The polyvinyl alcohol hydrogel in the present invention has excellent biocompatibility, and has functions of blocking bacteria, anti-adhesion, the absorption of exudate, promoting wound healing, observing in situ of wound healing process and the like.

Abstract: A composite material is provided. In some aspects, the composite material may include a combination of a thermoplastic resin mixed with a polypropylene-graft-maleic anhydride (PPgMA). Carbon particles may be mixed in the combination. In this way, the composite material may include between 80 wt. % and 90 wt. % of the thermoplastic resin, between 0.5 wt. % and 15 wt. % of PPgMA, and between 0.1 wt. % to 7 wt. % of carbon particles. Carbon particles may have exposed carbon surfaces with carbon atoms bonded to molecular sites on adjacent PPgMA molecules. At least some carbon atoms may be oxidized with one or more of oxygen-containing groups. Oxidation of carbon atoms may be associated with an increase in at least some PPgMA molecules chemically bonding with adjacent carbon atoms per unit volume. In this way, interaction between carbon atoms and PPgMA molecules may maintain composite material density within +/?3% of thermoplastic resin density.

Abstract: 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.

Abstract: Polymer polyols (“PMPOs”), processes for their production, and the use of such PMPOs, particularly in the production of flexible polyurethane foams. The PMPOs are produced using an ethylenically unsaturated composition that includes a crosslinker that results in crosslinks in the PMPO polymer particles that may decompose when exposed to flame temperatures. The PMPOs is capable of providing a flexible polyurethane foam that may exhibit combustibility resistance properties.

Abstract: The present invention relates to a preparation of a block of fiber-reinforced polyurethane/polyisocyanurate foam in which the expansion of the foam is constrained by the walls of a double belt laminator forming a tunnel, the block of fiber-reinforced polyurethane/polyisocyanurate foam being composed of cells storing a gas, advantageously having low thermal conductivity, and exhibiting a density of less than 50 kg·m?3 with a content of fibers Cf representing at least 4% by weight of the block of fiber-reinforced foam, in which the impregnation time of the fibers ti is less than the cream time tc of the polyurethane/polyisocyanurate foam.

Abstract: The present application provides foams having improved insulation and thermal performance and processes of forming said foams. Exemplary foams described herein are prepared according to a process comprising reacting or extruding a foamable composition comprising (i) a compound selected from E-CHCl?CHCF3, Z—CF3CH?CHCF3, and E-CF3CH?CHCF3, or any mixture thereof, and (2) a C5 hydrocarbon (e.g. cyclopentane), under conditions effective to form the foam.

Abstract: The present invention relates to new modified polymer polyols comprising at least one polyol and a stable dispersion of polymeric particles in the at least one polyol. The dispersed polymeric particles having a high content of P and N. There are also disclosed processes for the preparation of the herein described modified polymer polyols, and processes for preparing polyurethane materials containing them.

Abstract: A polyol component P) contains at least three different polyether polyols A) to C). A method produces rigid polyurethane foams using the polyol component P), and the rigid polyurethane foams produced therefrom are useful.

Abstract: A sponge-forming silicone rubber composition is disclosed. The sponge-forming silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups per molecule; (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule; (C) water; (D) a thickener; (E) a surfactant; (F) a silane compound having silicon atom-bonded alkoxy groups, or a partially hydrolyzed condensate thereof; and (G) a hydrosilylation reaction catalyst. The sponge-forming silicone rubber composition forms a silicone rubber sponge. In general, the silicone rubber sponge has excellent water absorption and water retentivity.

Abstract: An article is prepared by injection molding, wherein the article is formed from a hydrophilic thermoplastic polyurethane composition, wherein the thermoplastic polyurethane composition comprises the reaction product of a hydroxyl terminated polyol intermediate component, an aliphatic isocyanate component, and, optionally, a chain extender component. For injection molding, the hydrophilic thermoplastic polyurethane has a crystallization temperature measured by dynamic scanning calorimetry of at least 75° C.

Abstract: A polyethylene powder having a limiting viscosity [?] of 2.0 dl/g or more and less than 20.0 dl/g as measured in decalin at 135° C., wherein the polyethylene powder presents a percentage decrease from a specific surface area A measured by the BET method before heating at 120° C. for 5 h to a specific surface area B measured by a BET method after heating at 120° C. for 5 h, ((A?B)/A×100), of 0.1% or more and less than 35%.

Abstract: Disclosed is a method of manufacturing a polyurethane filter foam having excellent air permeability, elasticity, and restoring force. In the method of manufacturing the polyurethane filter foam, the cell size of the filter foam is made regular by controlling the pressure by adjusting the diameter of the foaming head of a foaming machine, rather than adding a cell opener, cell irregularity caused by poor dispersion of the cell opener is alleviated, and air permeability, porosity, and compression set are excellent.

Abstract: A flame-retardant urethane resin composition comprises a polyisocyanate compound, a polyol compound, a trimerization catalyst, a foaming agent, a foam stabilizer, and an additive, in which the trimerization catalyst is at least one selected from the group consisting of a nitrogen-containing aromatic compound, a carboxylic acid alkali metal salt, a tertiary ammonium salt, and a quaternary ammonium salt, and the additive comprises red phosphorus and at least one selected from the group consisting of a phosphoric acid ester, a phosphate-containing flame retardant, a bromine-containing flame retardant, a boron-containing flame retardant, an antimony-containing flame retardant, and a metal hydroxide.

Abstract: Hybrid spray foams utilize a urethane reactant, a crosslinker, and an (optional) epoxy and/or acrylic resin along with a blowing agent and rheology modifier to produce a quick-setting foam that remains in place until the foam forms and cures. The urethane reactant may be formed as an adduct with or without the use of isocyanate chemistry. In some embodiments, the polyurethane oligomer is made by reacting cyclocarbonates and di- or polyamines, while in other embodiments the polyurethane backbone employs the use of commercially available capped or blocked urethane oligomers made by any method. The oligomers contain reactive groups, typically at the oligomer ends, that crosslink with crosslinkers or with acrylic or epoxy resins to form hybrid polyurethane foams. Foams may also contain a plasticizer, and/or a surfactant as well as other optional additives. Methods of making such foams are also provided.

Abstract: The present invention provides a foam having a surface which solates or gelates after absorption of water and appropriately absorbs the water. The foam is prepared by a foam reaction of a mixture comprising at least one polyol, a compound having at least one isocyanate group, and a hydrophilic polymer.

Abstract: [Problem] An object of the present invention is to provide a foam including a thermoplastic resin and rubber as a main component, in which a micronized product of a cellulose fiber is uniformly dispersed, and uniformity and mechanical properties are excellent. [Solution] A foam includes a modified cellulose fiber (A) covalently bonded with a diene-based polymer, a thermoplastic resin and/or rubber (B), and a diene-based polymer (C) having a functional group capable of covalently bonding with a cellulose fiber, in which the fiber (A) is micronized, the fiber (A) has a content of 0.05 to 20% by mass, and the thermoplastic resin and/or rubber (B) has a glass transition point of ?130° C. to 120° C.