Degradable downhole tools, tool components, and balls are formed from a polyvinyl alcohol (PVA) compound. The PVA compound exhibits strength and elasticity properties that are comparable to existing degradable downhole polymers and further exhibits degradability properties that are superior to existing degradable downhole polymers. For different components, the PVA compound may include a reinforcing material such as fiberglass. A plug for use in a wellbore conduit may include a sealing element that is formed of PVA compounds of various types.

Pre-impregnated composite material (prepreg) that can be cured/molded to form aerospace composite parts. The prepreg includes carbon reinforcing fibers and an uncured resin matrix. The resin matrix includes an epoxy component, polyethersulfone as a toughening agent, and a curing agent. The resin matrix is also composed of a thermoplastic particle component that includes hybrid polyamide particles wherein each hybrid particle contains a mixture of amorphous and semi-crystalline polyamide.

The invention relates to fibre-reinforced composite (K) comprising (based on the total weight of the fibre-reinforced composite (K)): (A) 50 wt.-% of at least one continuous fibrous reinforcement material; (B) <50 wt.-% of at least one substantially amorphous matrix polymer composition comprising (based on the total weight of the matrix polymer composition (B)): (B1) 60 to 80 wt.-% of at least one copolymer of styrene and/or -methyl styrene and acrylonitrile having a number average molecular weight Mn of 30,000 to 100,000 g/mol; and (B2) 20 to 40 wt.-% of at least one copolymer of styrene, acrylonitrile, maleic anhydride and/or maleic acid having a number average molecular weight Mn of 30,000 to 100,000 g/mol; wherein the matrix polymer composition (B) has a glass transition temperature (Tg) of at least 100 C. and a melt volume-flow rate (MVR (220/10) determined according to ISO 1133) of 10 to 90 mL/10 min.

The invention relates to flame-retardant polyamide compositions comprising polyamide having a melting point of not more than 290 C. as component A, fillers and/or reinforcers as component B, phosphinic salt of the formula (I) as component C

##STR00001##

in which R.sub.1 and R.sub.2 are ethyl,
M is Al, Fe, TiO.sub.p or Zn,
m is 2 to 3, and
p=(4m)/2 compound selected from the group of the Al, Fe, TiO.sub.p and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component D phosphonic salt of the formula (II) as component E

##STR00002##

in which R.sub.3 is ethyl,
Met is Al, Fe, TiO.sub.q or Zn,
n is 2 to 3, and
q=(4n)/2 melamine polyphosphate having an average degree of condensation of 2 to 200 as component F, sterically hindered phenolic antioxidant as component G, and/or organic phosphite and/or organic phosphonite as component H.

The polyamide compositions can be used for production of fibers, films and shaped bodies, especially for applications in the electricals and electronics sector.

Disclosed embodiments include hollow composite utility pole, cross arm, and brace structures and methods of manufacture of the same using fire retardant materials. Poles, cross arm, and brace structures may be manufactured using a fire resistant resin impregnated, or resin wetted, filament roving that is wound onto a mandrel, pultruded or otherwise formed into a structural part. Various pole structures and manufacturing methods are described, including chemically bonded sleeve joint structures for poles of varying size.

A prepreg containing at least the following components [A]-[F], wherein the ratio Ne/Nd of the number of structures Ne of component [F] present in a range of outside 110% of the particle diameter of component [E] and the number of structures Nd of component [F] present in a range outside 110% of the particle diameter of component [D] is 0.25 or higher. [A]: Carbon fibers, [B] thermosetting resin, [C]: curing agent, [D]: particles composed mainly of thermoplastic resin having a primary particle number-average particle size of 5-50 m, [E]: conductive particles different from component [D] and having a primary particle number-average particle size in the range of a specific expression, [F]: filler comprising a carbon material.

A filler-loaded thermal conductive liquid compositions formed by dispersing a powder composition, which contains polymer particles containing thermoplastic polymer particles, and thermal conductive filler particles containing particles having a graphite-like structure, obtained by pulverizing 5-70 parts by weight of the polymer particles and 30-95 parts by weight of the thermal conductive filler particles, the filler particles being covered with micronized polymer particles and the covered particles being uniformly dispersed, using 25-250 parts by weight of a liquid reactive dispersing medium and/or a dispersing medium containing a thermoplastic polymer having a deflection temperature under load or a melting point lower than the thermoplastic polymer used in the powder composition, and the liquid composition having conditions that a thermal conductive infinite cluster exhibiting a thermal conductivity of 1-35 w/mk is formed and a concentration of thermal conductive filler particles is equal to or more than a percolation threshold.

Disclosed herein are a thermoplastic resin sheet having excellent mechanical strength and excellent conformability during molding, a laminated sheet using such a thermoplastic resin sheet, and a molded body. The thermoplastic resin sheet includes a thermoplastic resin containing a polyolefin resin, a polyamide resin, and a compatibilizer, wherein the compatibilizer is a modified elastomer having a reactive group that reacts with the polyamide resin. The laminated sheet includes a base layer containing a polyolefin resin and the thermoplastic resin sheet bonded to one surface of the base layer. The molded body includes a base body containing a polyolefin resin and the thermoplastic resin sheet or the laminated sheet bonded to one surface of the base body.

The present invention relates to a polymer film comprising a base film comprising polyamide-based resin; and two or more kinds of copolymers comprising polyamide-based segments and polyether-based segments, and a method for preparing the polymer film.

A prepreg including: a component (A); a component (B); and a component (C), in which the component (A) is a reinforced fiber substrate, the component (B) is an epoxy resin composition, the component (C) is a component (c1) or a component (c2), the component (c1) includes polyamide particles and thermosetting polyimide particles, and the component (c2) includes spherical polyamide particles having a melting point of 140 C. to 175 C.