Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III):

##STR00001##

The present invention relates to a porous membrane suitable for use in high pressure filtration method.

A resin composition is provided. The resin composition comprises the following components: (A) a halogen-free epoxy resin; (B) a hardener; and (C) a phosphorus-containing phenolic resin of the following formula (I): ##STR00001##
wherein m, n, l, R.sub.1, and R.sub.2 are as defined in the specification.

It is intended to provide a resin composition that serves as a raw material for a printed circuit board excellent in heat resistance after moisture absorption and is excellent in moldability. The resin composition of the present invention contains a maleimide compound, a silane compound having a carbon-carbon unsaturated bond and a hydrolyzable group or a hydroxy group, a silane compound having an epoxy skeleton and a hydrolyzable group or a hydroxy group, and an inorganic filler.

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III): ##STR00001## ##STR00002##

An ion exchange membrane includes: a cation exchange resin material; and a macromolecular material that has an acidic functional group and is mixed in the cation exchange resin material.

A resin composition is provided. The resin composition comprises the following components: (A) a halogen-free epoxy resin; (B) a hardener; and (C) a phosphorus-containing phenolic resin of the following formula (I):

##STR00001##

wherein m, n, 1, R.sub.1, and R.sub.2 are as defined in the specification.

A foam material having one glass transition temperature (Tg) and made from an immiscible composition having at least two glass transition temperatures (Tg) by an extrusion process wherein said composition (C) comprises at least one polyarylene (P1) polymer, wherein more than 50% by moles (moles %) of the recurring units of said (P1) polymer are recurring units (R1) consisting of an arylene group, wherein said arylene group is a hydrocarbon divalent group consisting of one core composed of one benzene ring or of a plurality of benzene rings fused together by sharing two or more neighboring ring carbon atoms, said benzene ring being optionally substituted, wherein each of said arylene group is bound to two other arylene groups of neighboring recurring units (R1) through a first CC bond (E1) and a second CC bond (E2), wherein at least 20 moles % of recurring units (R1) are kink-forming arylene units (R1-b), the remainder being rigid rod-forming arylene units (R1-a) different from arylene.sub.R1.sub._.sub.b units, wherein in said aryleneR.sub.1.sub._.sub.a units the bond (E1) and the bond (E2) are co-linear and anti-parallel towards each other, said (P1) polymer being present in composition (C) in an amount of below 75% by weight (wt. %) and above 10 wt. % based on the total wt. % of (P1) polymer and (PPSU) polymer, and (ii) at least one polyphenylsulfone polymer, said (PPSU) polymer being present in composition (C) in an amount of below 90 wt. % and above 25 wt. % of based on the total wt. % of polyarylene (P4) polymer and (PPSU) polymer.

Provided is a flame-retardant sheet-forming body containing a matrix resin, a flame-retardant fiber, and a metal hydroxide. The content of the metal hydroxide in the flame-retardant sheet-forming body is 1 to 20% by weight with respect to the total weight of the flame-retardant sheet-forming body. In addition, the flame-retardant fiber in the flame-retardant sheet-forming body is preferably at least one of an aramid fiber, a pitch-based carbon fiber, and a BPO fiber.

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III):

##STR00001## ##STR00002##