Abstract: A storage tube assembly, with a cap having a top surface and a sealing member connected to the top surface, the sealing member has a generally cylindrical upper wall and a generally cylindrical lower wall, the sealing member also has a recessed portion between the upper wall and lower wall and a flange cut into the lower wall; a sealing ring, the sealing ring is sized to cooperate with and be received in the recessed portion of the sealing member of the cap; and a tube, the tube has a generally circular inner wall with a cut therein, the cut in the inner wall is positioned to receive the sealing ring when the sealing ring is positioned within the recessed portion of the cap and the cap is placed into an open end of the tube.

Abstract: A storage tube assembly, with a cap having a top surface and a sealing member connected to the top surface, the sealing member has a generally cylindrical upper wall and a generally cylindrical lower wall, the sealing member also has a recessed portion between the upper wall and lower wall and a flange cut into the lower wall; a sealing ring, the sealing ring is sized to cooperate with and be received in the recessed portion of the sealing member of the cap; and a tube, the tube has a generally circular inner wall with a cut therein, the cut in the inner wall is positioned to receive the sealing ring when the sealing ring is positioned within the recessed portion of the cap and the cap is placed into an open end of the tube.

Abstract: A storage tube assembly, with a cap having a top surface and a sealing member connected to the top surface, the sealing member has a generally cylindrical upper wall and a generally cylindrical lower wall, the sealing member also has a recessed portion between the upper wall and lower wall and a flange cut into the lower wall; a sealing ring, the sealing ring is sized to cooperate with and be received in the recessed portion of the sealing member of the cap; and a tube, the tube has a generally circular inner wall with a cut therein, the cut in the inner wall is positioned to receive the sealing ring when the sealing ring is positioned within the recessed portion of the cap and the cap is placed into an open end of the tube.

Abstract: Object: The present invention was conceived in light of the above-described prior art. The object of this invention is to provide a method for preparing optical-grade polycarbonate compositions, which method is able to prepare with good productivity optical-grade polycarbonate compositions that have not only excellent clarity and water resistance, but also excellent retention stability such as heat stability and hue stability when molten and a low content of inclusions and impurities, and that undergo little heat deterioration.Constitution: The method for preparing optical-grade polycarbonate compositions according to this invention, which method comprises the melt-polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of a catalyst, followed by the addition of additives B! while the polycarbonate A! obtained as the reaction product is in a molten state, and mixing.

Abstract: Polycarbonates are prepared by inducing the melt polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of alkali metal compounds and/or alkaline earth metal compound droxy and adding to the polycarbonate which is the reaction product thereof: a sulfonic acid compound having the formula ##STR1## in an amount of 0.05-10 ppm, based on the polycarbonate, an epoxy compound in an amount of 1-2000 ppm, based on the polycarbonate and a phosphorus compound in an amount of 10-1000 ppm, based on the polycarbonate.

Abstract: Polycarbonate resin compositions and methods for their preparation are disclosed. The disclosed compositions are comprised of polycarbonate resins and esters of aliphatic carboxylic acids and alcohols and exhibit good mold release and thermal stability while experiencing little discoloration during molding.

Abstract: The present invention relates to a method for preparing copolymeric polycarbonates which comprises melt polycondensing a mixture of an aromatic dihydroxy compound containing an amount of 2-90 mol % of hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing an alkali metal compound or an alkaline earth metal compound in an amount of 1.times.10.sup.-8 to 5.times.10.sup.-6 mole per mole of the total amount of the aromatic dihydroxy compound, then adding an acidic compound to the melt polycondensation product.

Abstract: A copolymeric polycarbonate containing repeating constituent units having formula [I] below and repeating constituent units having formula [II] below in a molar ratio of from 98:2 to 40:60. ##STR1## The above-described copolymeric polycarbonates have excellent resistance to chemicals, heat resistance and flame retardancy without compromising the impact resistance and good hues intrinsic to polycarbonates.

Abstract: A thermoplastic resin composition which contains 1-99 parts by weight of a polycarbonate resin and/or a copolyester carbonate resin, 99-1 parts by weight of a copolymer containing an aromatic vinyl monomer component, and a vinyl cyanide monomer component, and 1-40 parts by weight, based on 100 parts by weight of the resin and the copolymer combined, of a copolymer obtained by grafting onto a rubbery polymer an acrylic monomer provides polycarbonate resin compositions having excellent low-temperature impact properties and outstanding moldability.

Abstract: The method of this invention prepares copolymeric polycarbonates which have excellent mechanical properties, heat resistance and transparency, and which also have improved chemical resistance, hue, and residence stability by inducing the melt polycondensation of an aromatic dihydroxy compound containing an amount of 2-90 mol % of hydroquinone and/or substituted hydroquinones with a diester carbonate in the presence of a catalyst containing alkali metal compounds and/or alkaline earth metal compounds in an amount of 1.times.10.sup.-8 to 5.times.10.sup.-6 mole per mole of the total amount of the aromatic dihydroxy compound.

Abstract: Optical grade polycarbonate resin compositions and methods for their preparation are disclosed. The disclosed compositions are comprised of polycarbonate resins and esters of aliphatic carboxylic acids and alcohols and exhibit good mold release and thermal stability while experiencing little discoloration during molding.

Abstract: Glycidyl (meth)-acrylate polymer and an organic acid, phosphoric acid, phosphorous acid, hypophosphoric acid and/or a compound other than an organic acid containing one or more functional groups selected from among carboxyl, amino, hydroxyl, acid anhydride and thiol groups added to an aromatic polycarbonate resin composition, decrease the luster of the composition without compromising the properties of the composition.

Abstract: Resin compositions comprising (A) polyethylene ether resins, (B) polyamide resins, (C) elastomeric substances, and (D) needle-shaped titanium oxide are disclosed. The disclosed resins exhibit an excellent balance of stiffness and impact resistance, low linear coefficient of expansion, and good heat resistance, oil resistance, forming processability and molding surface appearance.

Abstract: Polycarbonate resin compositions methods for their preparation are disclosed. The disclosed compositions are comprised of polycarbonate resins and .alpha.-olefin oligomers and exhibit good mold release and thermal stability while experiencing little discoloration or molecular weight reduction during molding.

Abstract: [Purpose] The object of the present invention is to provide a method of product copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and color tone.[Constitution] A method of producing copolymerized polycarbonates by melt polycondensation of two or more aromatic dihydroxy compounds with a carbonate diester, characterized in that(i) resorcin and/or substituted resorcins are used as 2-90 mole % of the aromatic dihydroxy compounds, where the sum of all the aromatic dihydroxy compounds is taken as 100 mole %, and(ii) an alkali metal compound and/or an alkaline-earth metal compound (a) is used as the catalyst.

Abstract: Polycarbonates are prepared by inducing the melt polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of alkali metal compounds and/or alkaline earth metal compound droxy and adding to the polycarbonate which is the reaction product thereof: a sulfonic acid compound having the formula ##STR1## in an amount to 0.05-10 ppm, based on the polycarbonate, and also an epoxy compound in an amount of 1-2000 ppm, based on the polycarbonate.

Abstract: Electrically conductive resin compositions are provided. The electrically conductive resin composition comprises(A) the following in a total of 100 parts by weight:(a) 50-99 parts by weight of polyether imide resin, and(b) 1-50 parts by weight of polyphenylene sulfide resin; and(B) 1-30 parts by weight of electrically conductive carbon black.This resin composition exhibits excellent electrical conductivity, flame retardance, heat resistance, mechanical properties and moldability.

Abstract: Object: The present invention was conceived in light of the above-described prior art. The object of this invention is to provide a method for preparing optical-grade polycarbonate compositions, which method is able to prepare with good productivity optical-grade polycarbonate compositions that have not only excellent clarity and water resistance, but also excellent retention stability such as heat stability and hue stability when molten and a low content of inclusions and impurities, and that undergo little heat deterioration.Constitution: The method for preparing optical-grade polycarbonate compositions according to this invention, which method comprises the melt-polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of a catalyst, followed by the addition of additives [B] while the polycarbonate [A] obtained as the reaction product is in a molten state, and mixing.

Abstract: To obtain light-diffusing polycarbonate resin compositions which show excellent light diffusing characteristics while maintaining the impact strength and other inherent properties of the matrix resin.Resin compositions in which certain light-diffusing fine particles are added and dispersed in 100 wt. parts polycarbonate resins.