A polysiloxane-substituted quinacridone pigment is produced by a quinacridone pigment with an epoxy-terminated polysiloxane under conditions effective to cause the epoxy group on the polysiloxane to react with, and bond the polysiloxane to, the quinacridone pigment. The quinacridone pigment thus produced has the polysiloxane grouping bonded to one of the quinacridone nitrogen atoms via a hydrocarbon linking group, which bears a hydroxyl group on a carbon atom α or β to the quinacridone nitrogen atom. These quinacridone pigments are useful in electrophoretic displays.

The present invention relates to high-voltage components, especially for electromobility, containing polymer compositions based on at least one polyester and at least one sulfide containing cerium, and to the use thereof for production of polyester-based high-voltage components or for marking of polyester-based products as high-voltage components by laser.

An impact-modified polyamide composition comprising from 5 wt % to 85 wt % of polyamide polymer; from 10 wt % to 60 wt % glass fiber; from 3 wt % to 30 wt % of an impact modifier; and a melt stabilizer at a concentration less than 5 wt %; wherein the weight ratio of the impact modifier to the melt stabilizer ranges from 1.0:1 to 100:1; and wherein the polyamide composition demonstrates an un-notched Charpy impact energy loss at 23° C. that is greater than 80 kJ/m.sup.2 and a tensile strength greater than 135 MPa.

An impact-modified polyamide composition comprising from 5 wt % to 85 wt % of polyamide polymer; from 10 wt % to 60 wt % glass fiber; from 3 wt % to 30 wt % of an impact modifier; and a melt stabilizer at a concentration less than 5 wt %; wherein the weight ratio of the impact modifier to the melt stabilizer ranges from 1.0:1 to 100:1; and wherein the polyamide composition demonstrates an un-notched Charpy impact energy loss at 23° C. that is greater than 80 kJ/m.sup.2 and a tensile strength greater than 135 MPa.

Modelling material which includes (a) at least one radically polymerizable monomer, (b) at least one initiator for the radical polymerization and (c) at least one inert component. The inert component (c) is soluble in the polymer formed by polymerization of the monomer (a), wherein the solubility of component (c) decreases as the temperature increases, with the result that a phase separation takes place above a particular temperature. The material is suitable in particular for the production of models of dental restorations for investment casting processes.

Modelling material which includes (a) at least one radically polymerizable monomer, (b) at least one initiator for the radical polymerization and (c) at least one inert component. The inert component (c) is soluble in the polymer formed by polymerization of the monomer (a), wherein the solubility of component (c) decreases as the temperature increases, with the result that a phase separation takes place above a particular temperature. The material is suitable in particular for the production of models of dental restorations for investment casting processes.

A resin composition of the present invention is used in an optical layer 10 provided with a first layer (base material layer 1) including a polycarbonate-based resin and a visible light absorber for forming the first layer. The visible light absorber includes a plurality of kinds of light absorbers, and a melting point of a first light absorber having the lowest melting point is equal to or higher than 200° C., in which a melting point of a second light absorber having the highest melting point is equal to or lower than 330° C. The resin composition is such that the viscosity at 260° C. obtainable when a shear rate is 243.2 [1/sec] is equal to or more than 400 Pa.Math.s and equal to or less than 3500 Pa.Math.s.

A resin composition of the present invention is used in an optical layer 10 provided with a first layer (base material layer 1) including a polycarbonate-based resin and a visible light absorber for forming the first layer. The visible light absorber includes a plurality of kinds of light absorbers, and a melting point of a first light absorber having the lowest melting point is equal to or higher than 200° C., in which a melting point of a second light absorber having the highest melting point is equal to or lower than 330° C. The resin composition is such that the viscosity at 260° C. obtainable when a shear rate is 243.2 [1/sec] is equal to or more than 400 Pa.Math.s and equal to or less than 3500 Pa.Math.s.

This invention provides a flame retardant agent composition capable of imparting excellent flame retardancy to a synthetic resin, a flame-retardant resin composition having excellent flame retardancy as well as water resistance and impact resistance, and a molded body thereof. Provided is a flame retardant agent composition containing the following components (A) and (B): component (A): a phosphate-based flame retardant agent containing at least any one of the following components (A-1) to (A-3): component (A-1): one or more melamine salts selected from the group consisting of melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate; component (A-2): one or more piperazine salts selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate; and component (A-3): one or more ammonium salts selected from the group consisting of ammonium orthophosphate, ammonium pyrophosphate, and ammonium polyphosphate; and component (B): one or more acid-modified polyolefins.

This invention provides a flame retardant agent composition capable of imparting excellent flame retardancy to a synthetic resin, a flame-retardant resin composition having excellent flame retardancy as well as water resistance and impact resistance, and a molded body thereof. Provided is a flame retardant agent composition containing the following components (A) and (B): component (A): a phosphate-based flame retardant agent containing at least any one of the following components (A-1) to (A-3): component (A-1): one or more melamine salts selected from the group consisting of melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate; component (A-2): one or more piperazine salts selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate; and component (A-3): one or more ammonium salts selected from the group consisting of ammonium orthophosphate, ammonium pyrophosphate, and ammonium polyphosphate; and component (B): one or more acid-modified polyolefins.