The present invention relates to a (meth)acrylic composition suitable for (meth)acrylic polymeric compositions and (meth)acrylic polymeric composites, its method of preparation and its use. In particular the present invention relates to a (meth)acrylic composition that is slightly crosslinked once polymerized and that is suitable for (meth)acrylic composites and more particular for rebars. More particularly the present invention relates to a (meth)acrylic composition suitable for rebars, preparing such a (meth)acrylic compositions, composite rebar comprising is and method of preparing such a composite rebar. The present invention also relates also to the use of such a (meth)acrylic composition and use of rebars.

To provide a polymer electrolyte membrane capable of producing a polymer electrolyte fuel cell excellent in power generation characteristics and excellent in hydrogen gas utilization efficiency, as well as a membrane electrode assembly and a polymer electrolyte fuel cell obtainable by using it.

The polymer electrolyte membrane of the present invention comprises a polymer electrolyte, of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.4×10.sup.−9 cm.sup.3.Math.cm/(s.Math.cm.sup.2.Math.cmHg) and has a membrane thickness of from 7 to 20 μm.

An ethylene-(meth)acrylic acid copolymer has a portion having a melting temperature of 94° C. or higher. A content of the portion having the melting temperature of 94° C. or higher measured by a Successive Self-nucleation and Annealing (SSA) analysis is 1.5% or less. A water-dispersive composition includes the ethylene (meth)acrylic acid copolymer, a neutralizing agent and an aqueous medium.

This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

The present invention relates to certain dispersible ionomer powders made of particles consisting in quasi-spherical hollow agglomerates of elementary particles, to a method for their manufacture involving spray-drying of a latex of said ionomer, and to methods of using the same, notably for coating applications.

A method for producing a heat-resistant crosslinked fluorocarbon rubber formed body, comprising: (a) a step of melt-kneading 0.003 to 0.5 part by mass of an organic peroxide, 0.5 to 400 parts by mass of an inorganic filler, and more than 2.0 parts by mass and 15.0 parts by mass or less of a silane coupling agent, with respect to 100 parts by mass of a base rubber containing a fluorocarbon rubber, at a temperature equal to or higher than a decomposition temperature of the organic peroxide, to prepare a silane master batch; a heat-resistant crosslinked fluorocarbon rubber formed body obtained by the method, a silane master batch, a mixture and a formed body thereof, and a heat-resistant product.

An oil composition includes an oil and an effective amount of a wax inhibitor that includes at least one modified alpha-olefin maleic anhydride copolymer of the formula: ##STR00001##
wherein R1 is selected from hydrogen or hydrocarbyl groups containing 12-60 carbon atoms and an average carbon atom number of R1, if not hydrogen, in the copolymer is in a range from 20 to 32, R2 is selected from hydrocarbyl groups containing 6-12 carbon atoms, and n is a number of repeating units ranging from 1 to 100.

This invention relates to the use of ethylene/propylene random copolymers for the production of films having low-haze. In particular, the present invention involves the use of ethylene/propylene random copolymer comprising 90-96.5 wt % propylene and 3.5-10 wt % ethylene demonstrated to have low haze. This invention also relates to an ethylene/propylene random copolymer composition comprising about 3.5-10 wt % ethylene content and about 90-96.5 wt % propylene content, for production of a low-haze film.

The disclosure generally relates to 3D printed articles prepared from filaments comprising an ionomer (A) prepared from a base resin (B); wherein: base resin (B) is prepared from ethylene and at least one C.sub.3 to C.sub.8 α,β ethylenically unsaturated carboxylic acid monomer; the carboxylic acid moieties of base resin (B) are 10 to 99.5 percent neutralized by zinc or lithium; the at least one C.sub.3 to C.sub.8 α,β ethylenically unsaturated carboxylic acid is present from about 2 weight percent to about 30 weight percent, based on the weight of base resin (B).

The invention relates to the use of PMMI copolymers for reducing the decrease in molecular weight of the polymer induced by addition of talc in compositions based on aromatic polycarbonate. At the same time, the mechanical, optical and rheological properties of the thermoplastic composition, in spite of the addition of the PMMI copolymer, remain good and are in some cases even improved.