Abstract: A binder which is a graft polymer bearing at least two alkoxysilyl groups of the formula —Si(R1)m(OR2)3-m in which R1 and R2 are independently linear or branched alkyl groups containing 1 to 6 carbon atoms and m is an integer of 0 to 2. The graft polymer has graft branches on a graft base. The graft polymer contains at least 0.5% by weight, based on the graft base, of graft branches.

Abstract: A silicon-based polycarbonate of formula (I): wherein R1, R2, R3, R4, R5, R6, R8 and R9 are the same or different and selected from hydrogen or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical; R7 is a divalent linking group or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated by hydrocarbon radical; A is an endcapping group; n, y and z are integers of 0 or more; and x is an integer of 0 or more.

Abstract: A flame-retardant polycarbonate resin composition comprising either a resin mixture of a polycarbonate resin and a styrenic resin, a functional group-having silicone compound, and a fluoro-olefin resin; or a polycarbonate resin, a functional group-having silicone compound, and a core/shell-type, grafted rubbery elastomer; or a resin mixture of a polycarbonate resin and a styrenic resin, a fluoro-olefin resin, an inorganic filler, and a polycarbonate-polyorganosiloxane copolymer and/or a functional group-having silicone resin, which composition and its moldings, exhibit good flame retardance, good impact resistance, and good thermal stability.

Abstract: The present invention provides flame retardants which can provide high flame retardancy by means of silicon compounds. A flame retardant comprising an aromatic group-containing organosiloxane compound wherein said compound has the following mean composition formula (1), does not flow at 23° C., flows at 200° C., does not gelate when heated at 200° C. with stirring for 30 minutes, has a number average molecular weight of not less than 2,000 and at the same time, dissolves not less than 100 g in 1 L of a solvent toluene at 23° C.: R1mR2nSiO(4-m-n)/2??(1) in the formula, R1 represents a univalent aliphatic hydrocarbon group containing 1 to 4 carbon atoms; R2 represents a univalent aromatic hydrocarbon group containing 6 to 24 carbon atoms; R1 and R2 each may contain two or more species; and m and n are numbers satisfying 1.1?m+n?1.7 and 0.4?n/m?2.5.

Abstract: A thermoplastic composition comprising, 1 to 30 weight percent of a cycloaliphatic polyester; and greater than or equal to 40 weight percent of a polyorganosiloxane/polycarbonate block copolymer.

Abstract: The nanoscopic dimensions of polyhedral oligomeric silsesquioxanes (POSS) and polyhedral oligomeric silicates (POS) materials ranges from 0.7 nm to 5.0 nm and enables the thermomechanical and physical properties of polymeric materials to be improved by providing nanoscopic reinforcement of polymer chains at a length scale that is not possible by physically smaller aromatic chemical systems or larger fillers and fibers. A simple and cost effective method for incorporating POSS/POS nanoreinforcements onto polymers via the reactive grafting of suitably functionalized POSS/POS entities with polymeric systems amenable to such processes is described. The method teaches that the resulting POSS-grafted-polymers are particularly well suited for alloying agents by nongrafted POSS entitles such as molecular silicas. The successful alloying of POSS-polymers is aided because their interfacial tensions are reduced relative to non-POSS containing systems.

Abstract: The invention concerns a thermosetting elastomer composition based on modified polycyanurate with improved thermal resistance obtainable by a polymerization method in the presence of a catalyst (D) of a mixture comprising at least: (A) a cyanate, (B) a block copolymer consisting of: a) at least a central block (B1) non-miscible with the cyanate and sufficiently long to provide the composition with elastomeric character; and b) at least two terminal blocks (B2) located on each side of the central block and comprising groups reactive with the cyanate, each of the blocks (B2) being sufficiently long to be miscible with the cyanate; and (C) a mineral filler reactive with the cyanate, in proportions such that the ratio r is not less than 5, but remains less than a threshold value to avoid phase inversion, said method comprising steps which consist in: I) mixing (A), (B), (C) and (D) until a homogeneous mixture is obtained at a temperature higher than the melting point of (A) and of (B) but lower than about 130° C.

Abstract: The present invention relates to a thermoplastic resin composition which has an improved impact resistance while maintaining mechanical properties such as strength and rigidity. In the present invention, a thermoplastic resin (A) is mixed with a polytetrafluoroethylene-containing mixed powder (B) consisting of a polytetrafluoroethylene (b1) having a particle diameter of 10 ?m or less and an organic polymer (b2). In this case, the polytetrafluoroethylene-containing mixed powder (B) is mixed so that the amount of a polytetrafluoroethylene component is from 0.0001 to 20 parts by weight based on 100 parts by weight of the thermoplastic resin (A), and a polymer having an epoxy group was used as the organic polymer (b2). The thermoplastic resin composition of the present invention can be widely used in the fields of automotive parts, electric and electronic parts, and precision instrument parts.

Abstract: Copolyorganosiloxanecarbonates are prepared by first preparing an oligomeric aromatic polycarbonate, such as an oligomeric bisphenol A polycarbonate, in the presence of a tertiary amine as the only catalyst species; contacting the oligomeric polycarbonate mixture with a polyorganosiloxane bis(aryl)chloroformate, such as the bischloroformate of hydroxy-terminated eugenol polydimethylsiloxane; and introducing phosgene and/or chain termination agent either continuously or in stages. A feature of the process is the presence of dihydroxyaromatic compound in only one charge, at the beginning. The products have excellent physical properties, including transparency.

Abstract: A shape memory polyurethane or polyurethane-urea polymer including a reaction product of: (A) (a) silicon-based macrodiol, silicon-based macrodiamine and/or polyether of the formula (I): A—[(CH2)m—O]n—(CH2)m—A?, wherein A and A are endcapping groups; m is an integer of 6 or more; and n is an integer of 1 or greater; (b) a diisocyanate; and (c) a chain extender; or (B) (b) a diisocyanate: and (c) a chain extender, said polymer having a glass transition temperature which enables the polymer to be formed into a first shape at a temperature higher than the glass transition temperature and maintained in said first shape when the polymer is cooled to a temperature lower than the glass transition temperature, said polymer then being capable of resuming its original shape on heating to a temperature higher than the glass transition temperature.

Abstract: The present invention includes a co-polymer film which can be applied over a surface of an article to form a continuous surface that is more biocompatible and has a smoother surface morphology than an untreated article. In general the co-polymer film of the invention can be formed by providing a hydrophobic polymer block, such as polydimethylsiloxane (PDMS) with functional —OH end groups and reacting the —OH ends with a conventional monomer or prepolymer of a film-forming polymer capable of reacting with —OH groups. Such reactions are exemplified, using as reactive PDMS a triblock copolymer of the polylactone-polysiloxane-polylactone (PL-PDMS-PL) type, or silicone polyesters. The —OH groups of the polylactone blocks can react with any of a variety of isocyanates in a suitable solvent to form a polymer having PDMS incorporated with its structure.

Abstract: A thermoplastic polymer molding composition useful for producing an article, where the molding composition comprises a polyorganosiloxane-polycarbonate block copolymer and a flow modifier; wherein the flow modifier is at least one selected from the group consisting of a polyalkylene glycol, a low weight average molecular weight polycarbonate polymer, or mixtures thereof; and further wherein the flow modifier reduces surface imperfections when molded into the article.

Abstract: The present invention relates to a black resin composition comprising: a polycarbonate-siloxane copolymer resin, the copolymer comprising polycarbonate units and polyorganosiloxane units wherein the median siloxane domain size is greater than 100 nanometers; and a colorant combination comprising at least one organic colorant and at least one inorganic colorant, wherein the combination of the organic and inorganic colorant results in a black molded part with an L* value of less than about 29 and C* value of less than about 1.5 (specular component included) or L* value of less than 8 and C* value of less than about 3 (specular component excluded).

Abstract: Disclosed is an aromatic polycarbonate resin composition comprising a resin component (A) selected from the group consisting of an aromatic polycarbonate and a resin mixture of an aromatic polycarbonate and at least one organic polymer resin other than an aromatic polycarbonate, wherein the resin mixture has an aromatic polycarbonate content of 50% by weight or more, and at least one aromatic group-containing silicone compound (B), wherein the at least one aromatic group-containing silicone compound (B) comprises a monomer, a polymer or a mixture thereof, which is represented by at least one formula selected from the group consisting of the following formulae (1) and (2): wherein the component (B) contains the aromatic group in an amount of 5 to 100 mole %, based on the total molar amount of R1, R2, R3 and R4, wherein each of R1 and R2 represents a hydrogen atom or a C1-C20 hydrocarbon group, and each of R3 and R4 represents a hydrogen atom, a C1-C20 hydrocarbon group or a metal-containing g

Abstract: The invention relates to a method of preparing silicone copolycarbonates which incorporate both blocky and random substructures. Such silicone-containing copolycarbonates are useful in the preparation of a variety of molded articles such as optical disks. The structure of the compositions prepared by the method of the invention is determined by the method of preparation used and may be used to control physical properties. The copolymers are prepared by forming in a first step an intermediate silicone copolycarbonate possessing either a blocky or random structure and reactive endgroups, and then appending additional structural in a second step which is complimentary to the first step and produces a product silicone copolycarbonate having both random and blocky substructures. The repeat units I and II appended in the second step may be the same or different as those repeat units I and II incorporated in the first step.

Abstract: Disclosed herein is a light diffusing substrate in the form of film or sheet including multi-wall sheet and a process for making such light diffusing article, wherein the article comprises a light transmitting thermoplastic resin and about 0.001 to 10 wt. parts of a polyalkyl silsesquioxane, wherein the alkyl group is selected from a methyl, a C12-C18 alkyl, hydride, phenyl, vinyl, and cyclohexyl. The light diffusing substrate is characterized as having a surface roughness expressed as a centerline average height Ra of about or less than 0.1 &mgr;m, a ten-point surface roughness Rz of about or less than 1.0 &mgr;m, and a maximum height surface roughness Rmax of about or less than 1.0 &mgr;m.

Abstract: The present invention relates to a polycarbonate resin composition comprising (A) 100 parts by weight of a polycarbonate resin and (B) 0.001 to 20 parts by weight of a siloxane compound which is a polyorganosiloxane having such a structure that at least (1) an aromatic hydrocarbon group, (2) an aliphatic or aromatic organic group having at least one carboxylic acid ester linkage, ether linkage or mixture thereof, and (3) a phosphorus atom-containing group, are bonded to the silicon atoms therein.

Abstract: For making a polycarbonate resin resistant to flames with any of non-halogen and non-phosphorus compounds, provided is a polycarbonate resin composition having good flame retardancy and having good impact resistance, high stiffness and good chemical resistance. The flame-retardant polycarbonate resin composition comprises a resin mixture of (A) from 1 to 99% by weight of a polycarbonate and (B) from 1 to 99% by weight of a thermoplastic polyester, and contains, relative to 100 parts by weight of the resin mixture, (C) from 0.01 to 3 parts by weight of a polyfluoro-olefin resin, and (D) from 1 to 400 parts by weight of a polycarbonate-polyorganosiloxane copolymer and/or (E) from 0.1 to 10 parts by weight of a functional silicone compound.

Abstract: A method of using nanostructured chemicals as alloying agents for the reinforcement of polymer microstructures, including polymer coils, domains, chains, and segments, at the molecular level. Because of their tailorable compatibility with polymers, nanostructured chemicals can be readily and selectively incorporated into polymers by direct blending processes. The incorporation of a nanostructured chemical into a polymer favorably impacts a multitude of polymer physical properties. Properties most favorably improved are time dependent mechanical and thermal properties such as heat distortion, creep, compression set, shrinkage, modulus, hardness and abrasion resistance. In addition to mechanical properties, other physical properties are favorably improved, including lower thermal conductivity, fire resistance, and improved oxygen permeability.

Abstract: A flame retardant resin composition is provided comprising (A) 100 pbw of a resin comprising 10-100% by weight of an aromatic polycarbonate resin and 90-0% by weight of another thermoplastic resin, (B) 0.1-9.9 pbw of an organopolysiloxane containing silicon atom-bonded phenyl groups, and (C) 0.1-9.9 pbw of an organopolysiloxane containing silicon atom-bonded methyl groups and Si—H groups and free of an aromatic hydrocarbon group. The composition has satisfactory flame retardant effects and safety and minimal environmental load features, and molded articles can be effectively produced therefrom.

Abstract: Aspartate-functional silicone and the process for its preparation is disclosed. Also disclosed are aromatic polycarbonate that contains the inventive aspartate-functional silicone, a process for its preparation and its use in making molded articles.

Abstract: Block copolymers suitable as molding resins are provided having polycarbonate blocks and polysiloxane blocks of the structure where R1, R2, Y and m are as defined herein, and where the weight percentage of blocks of polycarbonate blocks is from 92 to 96% and the weight percentage of siloxane from blocks of polysiloxane blocks is from 4 to 8%.

Abstract: The present invention provides a polycarbonate having a low particle content, a process for producing high-purity polycarbonate and polycarbonate of maximum purity and molded products made from such polycarbonate.

Abstract: This invention is a flame resistant polycarbonate resin composition characterized by blending 0.01-2 weight parts of a silicone compound (B)) wherein a main chain has a branch structure and having an aromatic group in an organic substituent, 0.01-2 weight parts of an alkali metal salt of an aromatic sulfonic acid (C) represented by the following general formula 1 (hereafter, referred to as general formula 1), and 0.05-5 weight parts of a fiber-forming fluorine-containing polymer (D), relative to 100 parts of a polycarbonate resin (A): General formula 1: Am—R—(SO3M)n (wherein, R is a phenyl group, naphthyl group, or a phenyl group or naphthyl group substituted by A, where A is at least one type of substituent chosen from a group comprising a halogen atom, alkyl group, aryl group, vinyl group, alkoxy group, amino group, methyl ester group and ethyl ester group, and M is an alkali metal.

Abstract: A flame-retardant polycarbonate resin composition comprising either a resin mixture of a polycarbonate resin and a styrenic resin, a functional group-having silicone compound, and a fluoro-olefin resin; or a polycarbonate resin, a functional group-having silicone compound, and a core/shell-type, grafted rubbery elastomer; or a resin mixture of a polycarbonate resin and a styrenic resin, a fluoro-olefin resin, an inorganic filler, and a polycarbonate-polyorganosiloxane copolymer and/or a functional group-having silicone resin, which composition and its moldings, exhibit good flame retardance, good impact resistance, and good thermal stability.

Abstract: A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis(4-hydroxy-3-methylphenyl) fluorene and a bisphenol compound(s) having a polysiloxane skeleton, an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g.

Abstract: Disclosed is a shaped article obtained by (1) melting a flame retardant polycarbonate resin composition comprising a resin component (A) consisting of an aromatic polycarbonate or mainly comprising an aromatic polycarbonate, and a non-halogen flame retardant (B), and (2) molding the resultant molten resin composition, wherein the number of discrete particles, dispersed in said shaped article, each having a size of 50 &mgr;m or more, is 0 to 100/mm2 as measured with respect to the surface of a flat sample cut out from the shaped article.

Abstract: There is provided an aromatic polycarbonate resin composition which exhibits high flame retardancy without sacrificing melt-molding stability or melt fluidity when molding the resin composition. The flame retardant aromatic polycarbonate resin composition comprises a resin component (a) comprising an aromatic polycarbonate and optionally a styrene polymer, the resin composition having an aromatic polycarbonate content of 20% by weight or more; and 0.1 to 50 parts by weight of an organopolysiloxane (b) comprising a linear organopolysiloxane (b)i and a cyclic organopolysiloxane (b)ii, component (b)ii present in an amount of from 5 to 95% by weight based on the total weight of components (b)i and (b)ii.

Abstract: Release coating formulations and release coatings derived therefrom that incorporate a blend of a silicone vinyl copolymer and a second polymer for which the release qualities are extremely stable over time. The silicone vinyl copolymer and the second polymer include complementary crosslinkable functionality allowing interpolymer crosslinks to be formed.

Abstract: The present invention includes a co-polymer film which can be applied over a surface of an article to form a continuous surface that is more biocompatible and has a smoother surface morphology than an untreated article. In general the co-polymer film of the invention can be formed by providing a hydrophobic polymer block, such as polydimethylsiloxane (PDMS) with functional —OH end groups and reacting the —OH ends with a conventional monomer or prepolymer of a film-forming polymer capable of reacting with —OH groups. Such reactions are exemplified, using as reactive PDMS a triblock copolymer of the polylactone-polysiloxane-polylactone (PL-PDMS-PL) type, or silicone polyesters. The —OH groups of the polylactone blocks can react with any of a variety of isocyanates in a suitable solvent to form a polymer having PDMS incorporated with its structure.

Abstract: The present invention relates to a thermosetting low dielectric resin composition, a laminate for use in printed wiring, a laminate for a circuit, and the like. The present invention's thermosetting low dielectric resin composition contains a specific siloxane denatured polyimide, a compound having two or more allyl or methylallyl groups, and a compound having two or more maleimide groups. This resin composition adheres extremely well to metals with a low dielectric constant and low dielectric dissipation factor, and demonstrates very little scattering of the resin during operational processes like punching or cutting. By using laminates or laminates for circuits that employ this resin composition, electrical signals can be propagated more quickly, enabling signals to be processed at faster speeds.

Abstract: The invention relates to substantially single phase silicone copolycarbonates suitable for use in optical articles such as digital versatile disks. The silicone copolycarbonates contain residues of silicone containing and nonsilicone containing bisphenols and have properties particularly suited for use in high density optical data storage media. The invention further relates to the preparation and properties of substantially single phase silicone copolycarbonates having either a blocky or a random structure. The structure of the compositions of the invention is determined by the method of preparation used and may be used to control physical properties.

Abstract: Disclosed is an alkoxysilane/organic polymer composition for use in producing an insulating thin film, comprising (A) a specific alkoxysilane; (B) a specific organic polymer; and (C) a solvent for alkoxysilane (A) and organic polymer (B), wherein solvent (C) comprises at least one organic solvent selected from the group consisting of amide linkage-containing organic solvents and ester linkage-containing organic solvents. Also disclosed are a silica-organic polymer composite thin film which is produced by a process comprising: forming a thin film of the composition of the present invention; subjecting the thin film to a hydrolysis and dehydration-condensation reaction with respect to the alkoxysilane thereof, to thereby cause the alkoxysilane to be gelled in the thin film; and removing the solvent remaining in the thin film by drying, and a porous silica thin film which is obtained by removing the organic polymer from the silica-organic polymer composite thin film.

Abstract: A suspension containing crosslinked silicone particles with a lower mean particle diameter and a better dispersion in certain organic resins is prepared by emulsifying a condensation crosslinkable silicone composition containing (A) an organopolysiloxane having at least two silanol groups per molecule and (B) a crosslinker, but no (C) condensation catalyst, in water using a surfactant. A tin (II) salt of an organic acid with no more than ten carbon atoms is then emulsified in water with a surfactant, and added as the component (C) to the emulsion of condensation crosslinkable silicone composition. This crosslinks the emulsion of condensation crosslinkable silicone composition.

Abstract: A polyurethane composition comprising a chain extender including a silicon-containing diol of the formula (I): wherein R1, R2, R3, R4, R5, and R6 are the same or different and selected from an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical; R7 is a divalent linking group or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical; and n is 0 or greater, preferably 2 or less.

Abstract: An ink-jet recording sheet is provided with at least one ink-receiving layer on at least one side of a base material sheet. A resin component which constitutes the ink-receiving layer comprises a hydrophilic resin containing tertiary amino groups in a molecule thereof or a hydrophilic resin containing tertiary amino groups and polysiloxane segments in a molecule thereof. A coating formulation suitable in use for the production of the ink-jet recording sheet is also disclosed.

Abstract: A thermosetting low-dielectric resin composition which has a low dielectric constant and a low dielectric tangent for use in a printed circuit board and which has excellent adhesion to a metal and scatters almost no resin when used for forming a prepreg by punching or cutting, the composition comprising a component (a): siloxane-modified polyimide, component (b): a compound containing 2 methylallyl groups and having the following formula (1) or a compound containing 3 allyl groups or 3 methylallyl groups and having the following formula (1A), and component (c): a compound containing at least 2 maleimide groups, wherein R is a hydrogen atom or methyl group.

Abstract: Objects of the present invention are to provide colored coating compositions which can form easily a colored glass gel coating film being excellent in water resistance, boiling water resistance, alkali resistance, weather resistance, etc. at low temperatures on the outer surface of glass products, metal products, etc. and to provide colored coating compositions with which colored bottles having no haze can be obtained even if the bottles are coated in a high-humidity environment. The colored coating compositions according to the present invention comprise a sol-gel liquid obtained by polycondensation of phenyltrialkoxysilane or an oligomer thereof, acryl polyol, polyester polyol, polyether polyol and/or lower alkyl polyol (or the acryl polyol, the polyester polyol and/or the polyether polyol and a polyisocyanate resin), and an organic coloring agent.

Abstract: A melt condensation polymerization process for preparing siloxane copolycarbonates is provided. The process includes reacting an aromatic dihydroxy compound, carbonic acid diester, hydroxyaryl terminated polydiorganosiloxane and catalyst with a salt.

Abstract: Molding materials contain, as essential components, an aromatic polycarbonate, a graft polymer based on alkyl acrylates, styrenes and unsaturated nitriles, a copolymer based on styrenes and unsaturated nitrites, a siloxane network rubber, a copolymer of at least two different esters of acrylic acid or of methacrylic acid or mixtures thereof, if desired halogen-free phosphorus compounds and additives, and moldings, films or fibers are obtainable from the molding materials.

Abstract: A thermoplastic resin composition containing a polyetherimide resin, a glycidyl ester impact modifier and a organometallic compound exhibits improved impact strength and ductility.

Abstract: Solid blends of rubbery polymers and amorphous or crystalline polymers, said blends being free-flowing at temperatures lower than the glass transition temperature or crystalline melting temperature of the amorphous or crystalline polymer, are prepared by intimate mixing procedures. In general, said mixing conditions include high shear conditions sufficient to convert polymer A to dispersed particles coated with polymer B and produce a free-flowing blend.

Abstract: A resin composition comprising (A) an aromatic polycarbonate resin or aromatic epoxy resin and (B) a minor amount of an organosiloxane containing phenyl and alkoxy radicals is flame retardant and does not emit harmful gases when burned. It can be molded into parts having optical transparency.

Abstract: A coating agent composition, comprising (A) 100 parts by weight of a polymer having at least two alkoxysilyl groups, wherein the polymer has a number average molecular weight of 500 to 500,000, the polymer has a principal chain comprising a polycarbonate or a polyarylate, and the alkoxysilyl groups in the polymer have the formula —SiR3−a(OR′)a, wherein R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, R′ is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and a is from 1 to 3; (B) 50 to 2,000 parts by weight of an organic solvent; (C) 1 to 90 parts by weight of an organosilane, wherein the organosilane is a compound having the formula R″eSiY4−e or a partially hydrolyzed condensate thereof, wherein R″ is a substituted or unsubstituted monovalent hydrocarbon group or a hydrogen atom, Y is a hydrolyzable group, and e is from 0 to 2; and (D) a cure catalyst in an amount sufficient to cure t

Abstract: Process for preparing a thermosetting coating composition comprising;(a) mixing(i) a cleavable carbonyl polymer having an activated carbonyl group adjacent to oxygen or nitrogen, in the backbone, and having a molecular weight greater than 5,000(ii) a multifunctional compound having a molecular weight less than 5,000 having a functional group capable of reacting with the cleavable carbonyl polymer to cleave the polymer at the carbonyl group and bond with the cleaved polymer, the compound having a crosslinking group;(b) reacting the mixture in an extruder, at 50 to 350.degree. C. for 15 to 600 seconds, to cleave the polymer, and react the cleaved polymer with the functional group on the multifunctional compound(c) quenching the reaction mixture cooling prior to equilibrium reaction, to produce a functionalized cleaved polymer having crosslinking groups derived from the multifunctional compound and capable of crosslinking by heat reaction outside the extruder.

Abstract: The present invention relates to a siloxane random copolymer having a repeating unit represented by the following general formula (I) (II) and (III) at random and a resin composition containing the same. ##STR1## Further, the invention relates to a process of producing a siloxane copolymer comprising the step of reacting at least one polycarbonate and/or dicarbonate of diol and, if needed, at least one diester of dicarboxylic acid with at least one specified silicon compound in the presence of an esterifying or ester exchange catalyst.

Abstract: Block copolymers suitable as molding resins are provided having polycarbonate blocks and polysiloxane blocks of the structure ##STR1## where R.sup.1, R.sup.2, Y and m are as defined herein, and where the weight percentage of blocks of polycarbonate blocks is from 92 to 96% and the weight percentage of siloxane from blocks of polysiloxane blocks is from 4 to 8%.

Abstract: A process for the production of polysiloxane/polycarbonate block cocondensation products is disclosed. The process comprises reacting in the melt at temperatures of 250 to 320.degree. C. and pressures of 0.01 to 100 mbar (a) a hydroxyaryloxy-terminated dimethylsiloxane with (b) an oligocarbonate. The oligocarbonate is characterized in that its weight average molecular weight is 3000 to 24000 and the molar ratio of its OH end groups to aryl end groups is 10:90 to 70:30. The weight ratio of said (a) to said (b) in the inventive process is between 1:99 and 40:60. Also disclosed are the products prepared by the process.

Abstract: A polyarylene sulfide resin composition comprising (A) a polyarylene sulfide resin, (B) an aliphatic or saturated cyclic polycarbodiimide resin or a precursor thereof, and preferably (C) reactive silicone compound grains, and (D) a polyethylene naphthalate resin or (E) a filler, which improves excellent properties exhibited by polyarylene sulfide resins, and which is also endowed with an excellent adhesion characteristics to adhesives such as epoxy resins. In addition, a molded article obtained by molding a polyarylene sulfide resin composition endowed with such excellent properties is useful as a container for accommodating an electric component material. Such a molded article may also be used as an electronic component having conductive portions which are totally or partially accommodated in the container, wherein the conductive portions are seled by a sealant encapsulated in the container.

Abstract: There is disclosed a polycarbonate resin composition which comprises an (A) polycarbonate-polyorganosiloxane copolymer, a (B) polycarbonate resin and a (C) polytetrafluoroethylene which has fibril forming capability and an average molecular weight of at least 500,000 wherein the amount of the polyorganosiloxane moiety contained in the component (A) is 0.1 to 2.0% by weight based on the total amount of the components (A) and (B). The resin composition is excellent in flame retardancy, thermal stability and fluidity while preventing melt dripping at the time of combustion. Accordingly, the resin composition is favorably used in the application field of office automation machinery and equipment, electric and/or electronic field, etc.