Described is a method for producing covalently and/or ionically cross-linked blend membranes from a halomethylated polymer, a polymer comprising tertiary N-basic groups, preferably polybenzimidazole, and, optionally, a polymer comprising cation exchanger groups such as sulfonic acid groups or phosphonic acid groups. The membranes can be tailor-made in respect of the properties thereof and are suitable, for example, for use as cation exchanger membranes or anion exchanger membranes in low-temperature fuel cells or low-temperature electrolysis or in redox flow batteries, orwhen doped with proton conductors such as phosphoric acid or phosphonic acidfor use in medium-temperature fuel cells or medium-temperature electrolysis.

A curable resin composition which comprising (A), (B) and (C) as follows: (A) 100 parts by mass of polyfunctional epoxy component which contains (A1) a trifunctional epoxy compound having three glycidyl groups in a molecule and (A2) a tetrafunctional epoxy compound having four glycidyl groups in a molecule, wherein (A1):(A2) is 10:90 to 90:10 in terms of mass; (B) 25 to 200 parts by mass of a cyanic acid ester compound having two or more of cyanato groups; and (C) 0.5 to 20 parts by mass of an imidazole compound as a curing agent.

Technologies are generally described to increase a surface smoothness of a 3D printed article implementing a water-based treatment using layer by layer (LBL) deposition. An initial 3D printed article having an anionic surface may be treated with a first aqueous solution comprising at least one polycation that may bind to the anionic surface to produce a first treated surface, which may be rinsed with water to remove the first aqueous solution. The first treated surface may be treated with a second aqueous solution comprising at least one anionic microparticle that may bind to the polycation to produce a final 3D printed article having. a second treated surface, which may be rinsed with water to remove the second aqueous solution. The bound polycation and anionic microparticle may be present as a single layer in the final 3D printed article that may act as a conformal coating to increase the surface smoothness.

A polymer electrolyte composition is excellent in practicality which has such an excellent chemical stability as to be able to withstand a strong oxidizing atmosphere during operation of a fuel cell and is capable of achieving excellent proton conductivity under a low-humidified condition and excellent mechanical strength and physical durability as well as a polymer electrolyte membrane, a membrane electrode assembly, and a polymer electrolyte fuel cell which use the polymer electrolyte composition. The polymer electrolyte membrane is a polymer electrolyte membrane that contains at least an ionic group-containing polymer electrolyte and a polyazole, which is a polymer electrolyte membrane in which a phase separation of 2 nm or larger in which the polyazole is a main component is not observed in transmission type electron microscopic observation.

The present invention relates to a halogen-free flame-retardant resin composition, based on the weight parts of organic solids, comprising (A) from 1 to 10 parts by weight of bismaleimide resin, (B) from 30 to 60 parts by weight of benzoxazine resin, (C) from 10 to 40 parts by weight of polyepoxy compound, (D) from 5 to 25 parts by weight of phosphorous-containing flame retardant, and (E) from 1 to 25 parts by weight of curing agent, which is amine curing agent and/or phenolic resin curing agent. The present invention further provides prepregs, laminates, laminates for printed circuits prepared from said resin composition.

This ceramic-based composite material forming method is for forming a ceramic-based composite material through impregnation with a melt silicon, and involves executing: a step for forming a laminate cured body by laminating and curing a prepreg in which reinforcing fibers and a matrix to be impregnated with the melt silicon are integrally formed; a step for forming an impregnation pathway in the formed laminate cured body by carbonizing the laminate cured body; and a step for impregnating, with the melt silicon, the laminate cured body having the impregnation pathway formed therein. A base material resin included in the matrix at least contains a benzoxazine resin.

Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with high density polyethylene particles and sintered into a shape. The polyethylene resin acts as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

A sheet molding compound (SMC) composition formulation including a curable resin, such as unsaturated polyester of vinyl ester, in an ethylenically unsaturated monomer; a low profile additive, in a curable solvent; and an intumescent additive, such as melamine polyphosphate or ethylene diamine phosphate. An article formed of the SMC composition formulation experiences no more than a 100% increase in thickness as compared to an initial thickness of the article after exposure to a flame. The low profile additive is present in the composition and the intumescent additive is present in the composition. The resulting article has a char strength at 3 mm thickness of between 100 and 1,000 Newtons.

An environment-friendly impregnation solution includes in percentage by weight: 1-15% of blocked isocyanate, 0.5-10% of special amino resin, 10-50% of rubber latex, 1-5% of auxiliaries, and the balance of water, wherein the sum of the weight percentage of each component is 100%. A method for preparing the environment-friendly impregnation solution includes adding blocked isocyanate and auxiliary A into water and stirring uniformly to obtain Composition 1; adding auxiliary B into Composition 1 and stirring uniformly to obtain Composition 2; adding special amino resin into Composition 2 and stirring uniformly, then subjecting the same to grinding to obtain Composition 3; adding rubber latex into Composition 3 and stirring uniformly to obtain the environment-friendly impregnation solution, followed by packaging. The impregnation solution of the invention does not contain toxic and harmful substances such as formaldehyde and resorcinol, and the preparation method thereof is simple.

A mixture can be used for modifying the rheology of polymeric substrates. The mixture contains a hydroxylamine ester and an isocyanate functionalized with a thio compound.