The flame retardant thermoplastic resin composition according to the present invention comprises (A) about 45 to 95 parts by weight of a polycarbonate resin; (B) about 1 to 50 parts by weight of a rubber modified vinyl graft copolymer; (C) about 0 to 50 parts by weight of a vinyl copolymer; (D) about 1 to 30 parts by weight of a mixture of oligomeric phosphoric acid ester compounds consisting of (dl) about 5 to 99 % by weight of an oligomeric phosphoric acid ester compound derived from bisphenol-A and (d2) about 1 to 95 % by weight of an oligomeric phosphoric acid ester compound derived from resorcinol, per 100 parts by weight of the sum of (A), (B) and (C); and (E) about 0.05 ~ 5 parts by weight of a fluorinated polyolefin resin, per 100 parts by weight of the sum of (A), (B) and (C).

Flame retardant thermoplastic resin composition

A thermosetting composition comprises a capped poly(arylene ether), an alkenyl aromatic monomer, and an acryloyl monomer. The composition provides good flow properties and fast curing rates. After curing, the composition exhibits good stiffness, toughness, heat resistance, and dielectric properties.

Poly(arylene ether)-containing thermoset composition, method for the preparation thereof, and articles derived therefrom

An echo canceller and method for cancelling in a return channel signal an echoed receive channel signal where the echoed receive channel signal is combined by an echo channel with an input return channel signal. The echo canceller has a first filter which generates first filter coefficients, generates a first echo estimate signal with the first filter coefficients, and updates the first filter coefficients in response to a first filter control signal. A first summer subtracts the first echo estimate signal from a combined return channel and echo receive channel signal to generate a first echo residual signal. A second filter generates second filter coefficients, generates a second echo estimate signal with the second filter coefficients, and updates the second filter coefficients in response to a second filter control signal. A second summer subtracts the second echo estimate signal from the combined signal to generate a second echo residual signal, and provides upon the return channel the second echo residual signal. A control unit determines from the receive channel signal, the combined signal, and the first and second echo residual signals, one of a plurality of control states wherein a first control state is indicative of a receive channel signal above a first predetermined energy level, wherein when the control unit is in the first control state it generates the first control signal and generates the second control signal when at least one of a first energy ratio of the first echo residual signal and the combined signal and a second energy ratio of the second echo residual signal and the combined signal exceed a predetermined level.

Network echo canceller

The flameproof resin composition according to the present invention comprises (A) 20 to 90 parts by weight of a rubber modified polystyrene resin; (B) 10 to 80 parts by weight of a polyphenylene ether resin; (C) 0.1 to 30 parts by weight of a ring-shaped phosphonic acid compound, per 100 parts by weight of the sum of (A) and (B); and (D) 0 to 25 parts by weight of an aromatic phosphoric acid ester compound, per 100 parts by weight of the sum of (A) and (B).

Flameproof thermoplastic resin composition

A flame retarded thermoplastic resin composition comprising (R) a thermoplastic resin comprising (A) a polycarbonate resin and (B) an aromatic polyester resin in an (A)/(B) ratio of 99/1 to 50/50 by weight, and per 100 parts by weight of the thermoplastic resin (R), (C) 0.5 to 100 parts by weight of a silicate compound and (D) 0.5 to 30 parts by weight of an organic phosphorus based flame retarder. The composition can exhibit excellent flame resistance and anti-drip property without containing a halogen atom and, moreover, has excellent properties such as heat resistance, mechanical strength, solvent resistance, surface property of moldings, and dimensional stability.

Flame-retardant thermoplastic resin composition

The invention relates to a polymer mixture which comprises an aromatic polycarbonate, a styrene­-containing copolymer and/or a styrene-containing graft polymer and a flame-retardant. It has been found that the use of a certain type of flame-retardants, namely oligomeric phosphates leads to a polymer mixture having improved properties. In particular to a polymer mixture having a good combination of flame retardancy, non-­juicing characteristics of the flame retardant, good plastifying effect and good heat resistance.

Polymer mixture comprising an aromatic polycarbonate, a styrene-containing copolymer and/or graft polymer and a phosphate based flame-retardant; articles formed therefrom

The invention relates to a polymer mixture which comprises an aromatic polycarbonate, a styrene-containing copolymer and/or a styrene-containing graft polymer and a flame-retardant. It has been found that the use of a certain type of flame-retardants, namely oligomeric phosphates leads to a polymer mixture having improved properties. In particular to a polymer mixture having a good combination of flame retardancy, non-juicing characteristics of the flame retardant, good plastifying effect and good heat resistance.

Polymer mixture having aromatic polycarbonate styrene I containing copolymer and/or graft polymer and a flame-retardant, articles formed therefrom

Polymer mixture containing aromatic polycarbonate, styrene copolymer and/or graft polymer, and flame retardant, and molded article of said polymer mixture

In the preparation of fine beads consisting of a polyphenylene ether - polystyrene mixture, a capped polyphenylene ether is preferably used. It has been found possible to cap the polyphenylene ether in the presence of the styrene monomer. This provides practical advantages.

Method of preparing beads of polyphenylene ether-polystyrene, beads thus formed

The invention relates to polymer mixtures which comprise a polyphenylene ether, a sterically hindered amine, an epoxy compound, and a salt of a fatty acid. The polymer mixtures according to the invention have a good stability against discoloring by light.

Christianus Adrianus Arnoldus Claesen

Papers

Polymer mixture comprising an aromatic polycarbonate, a styrene-containing copolymer and/or graft polymer and a phosphate based flame-retardant; articles formed therefrom

Polymer mixture having aromatic polycarbonate styrene I containing copolymer and/or graft polymer and a flame-retardant, articles formed therefrom

Polymer mixture containing aromatic polycarbonate, styrene copolymer and/or graft polymer, and flame retardant, and molded article of said polymer mixture

Method of preparing beads of polyphenylene ether-polystyrene, beads thus formed

Polymer mixture comprising polyphenylene ether, sterically hindered amine and epoxy compound and articles manufactured therefrom