Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.

Abstract: A miscible blend comprising from about 5 to about 95 weight percent of a polybenzimidazole and from about 95 to about 5 weight percent of a polyamide-imide having fluorine-containing linking groups, total weight percent of the two polymers being 100. A process for preparing the blends comprises dissolving in a mutual solvent from about 5 to about 95 weight percent of the aromatic polybenzimidazole to about 95 to about 5 weight percent of the polyamide-imide having fluorine-containing linking groups, based on the total weight of those polymers and subsequently evaporating the solvent, thereby producing a dried blend of a polybenzimidazole and a polyamide-imide having fluorine-containing linking groups. The blends, particularly in the form of films, fibers or fibrets, may be post-treated with heat or sulfuric acid in order to minimize their shrinkage when subsequently subjected to heat and in order to increase their resistance to solvents and acid.

Abstract: Linear saturated copolyesters of terephthalic acid, isophthalic acid, butanediol, and one or more aliphatic diols having at least 13 carbon atoms used as adhesives for the formation of wash-resistant bonds especially for temperature-sensitive materials. Preferably, the melting points of these adhesive compositions are from 50.degree. to 170.degree. C. and their relative viscosities, measured as 1% solutions in meta-cresol at 20.degree. C., are 1.40 to 1.80.

Abstract: A gas-permeable material with excellent compatibility with blood comprising polyurethane, polyurethaneurea, or the derivatives thereof is provided. The polyurethane or polyurethaneurea is obtained from a composition that comprises diisocyanate; polysiloxane containing terminal hydroxyl groups; and polyol or polyamine containing at least one tertiary amino gorup. The derivatives of the polyurethane or polyurethaneurea is obtained by the following steps of: converting the tertiary amino groups contained in the polyurethane or the polyurethaneurea to quarternary ammonium groups, and treating the polyurethane or the polyurethaneurea having quarternary ammonium groups with heparin.

Abstract: A surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of an additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts to the surface of the fiber or film at least one desired characteristic which otherwise would not be present, which composition includes at least one thermoplastic polymer and at least one defined additive. During formation of the fiber or film, the additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the polymeric material, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: Flame resistant polymer blends contain a polyetherimide and an impact strength-enhancing amount of a siloxane-polyetherimide copolymer. These blends exhibit high impact strengths, good blow-moldability and injection moldability, amenability to thermoforming and very low flammability. The blends are particularly suited to the manufacture of aircraft cabin interior components.

Abstract: A polyimide composition is disclosed with improved atomic oxygen resistance through incorporation of a specific polyorganosiloxane.

Abstract: A polyimide coating composition comprising an homogeneous liquid solution of (a) a polyimide or polyimide precursor, (b) a substituted silane compound and (c) aprotic solvent.

Abstract: A process for the preparation of crosslinked shapes from a polymer which consists of reacting a starting polyamide with a particular silane. The polyamide should have at least 30% by weight of branched polymer chains, but these may be furnished by adding branching agents to the monomers before or during polymerization. After the reaction with silane has taken place, the polymer is molded or otherwise formed into desired shapes and brought into contact with water. This causes three dimensional crosslinking of the polymer and provides improved mechanical and fire resistant properties to the finished product. Moreover, the finished product may be formed by the usual methods of shaping without any particular treatment being required.

Abstract: Flame resistant polymer blends contain a polyetherimide and an impact strength-enhancing amount of a siloxane-polyetherimide copolymer and a solvent resistance-enhancing amount of a polycarbonate. These blends exhibit excellent impact strengths, high heat distortion temperatures, good solvent resistance, and amenability to blow-molding, injection molding and thermoforming operations. The blends are particularly suited to the manufacture of aircraft cabin interior components.

Abstract: Derivatives of compounds containing a carbonyl group conjugated to an aromatic moiety and methods of fabrication thereof consisting of a thioether, an ester, an ether, a phosphate and a silylether. Electrons are supplied to the carbonyl group conjugated to an aromatic moiety to form a reduced material. The reduced material is contacted with an electrophile which attacks and chemically combines with the carbonyl group conjugated to an aromatic moiety. The parent material can be regenerated by hydrolysis of the derivative. A silyl derivative can be selectively formed on a polyimide material surface which can act as a barrier to an RIE etch of the polyimide material. After etch the polyimide material is regenerated from the silyl derivative.

Abstract: An alkoxysilane bearing amic acid or derivative thereof is formed by reacting an aromatic or aliphatic dianhydride and an aminoalkyltrialkoxysilane or aminoaryltrialkoxysilane, or reacting an aromatic or aliphatic dianhydride and a diamine to form an amic acid which is reacted with an aminoalkylenetrialkoxysilane. A thin, hard protective silica glass network is formed by reacting the alkoxysilane bearing amic acid with an alkoxysilane, preferably tetraalkoxysilane, and an epoxy bearing silane coupling agnet in an acid catalyzed sol-gel process involving hydrolysis and condensation, which provides an amide/ester modified silica network. In a variation of this process, a polyamic acid bearing anhydride termination is prepared by reacting an excess of a dianhydride with a diamine. The product of this reaction when reacted with an aminoalkylenetrialkoxysilane provides an alkoxysilane bearing oligomeric polyamic acid.

Abstract: Novel poly(imide-siloxane) block copolymers and a process for their preparation are disclosed. The process of this invention involves reacting a hydroxy-terminated polyimide oligomer with a siloxane oligomer, which has reactive end groups capable of displacement by reaction with the hydroxyl groups of the hydroxy-terminated polyimide oligomer.

Abstract: Liquid-crystalline, thermotropic, aromatic polyesters processable in the molten state, comprising units derived from hydroquinone mono- and possibly di-substituted with aralkyl groups.

Abstract: Disclosed are blends comprising from about 40 to 70 wt. % of a polyetherimide and the remainder one or more polyamides. The blends generally have a tensile strength which is greater than the tensile strength of polyetherimide-polyamide blends which do not contain from about 40 to 70% polyetherimide, while still retaining a good combination of other physical properties such as heat distortion characteristics and impact strength. In addition, the blends of the invention may have a flexural strength which is greater than that of other polyetherimide-polyamide blends which do not contain from about 40 to 70% polyetherimide.

Abstract: A synthetic resin composition, having a high toughness and a wear resistance, comprises a synthetic resin with solubility parameter .delta.9.5 cal1/2 cm.sup.31 3/2 or higher and a modifier with solubility parameter .delta.8.5 cal.sup.1/2 cm.sup.-3/2 or lower and dispersed therein, characterized in that a silicon containing copolyester, being a block copolymer consisting of 1.about.90% by weight of siloxane segment represented by the undermentioned general formula (A) and 99.about.1% by weight of polyester segment represented by the undermentioned general formula (B), the degree of polymerization of siloxane segment being 1.about.2,000, and that of polyester segment 1.about.1,000, is added to be mixed therewith as a dispersibility improver: ##STR1## (In this formula, m denotes a number of 1.about.2,000.) ##STR2## (In this formula, R.sub.1 designates one or two or more members selected from among aromatic divalent radicals having 6.about.12 carbon atoms or aliphatic divalent radicals having 4.about.

Abstract: Novel ionomeric silane coupling agents are disclosed and their use in bonding a matrix polymer to a mineral substrate is described. The coupling agents comprise amic acid-functional silanes which are partially neutralized with metal cations and are prepared by reacting a mixture of (I) an amine-functional silane, (II) a stoichiometric excess of a dicarboxylic organic acid and (III) an ionic compound containing a metal cation, wherein 10% to 80% of the excess carboxylic acid functionality is neutralized by the metal cations. The coupling agents greatly improve bonding to the matrix polymer in moist environments and are particularly suitable for use in formulating filled injection molding compositions.

Abstract: A novel ionomeric silane coupling agent is disclosed and its use in bonding a matrix polymer to a mineral substrate is described. The coupling agent is prepared by partially neutralizing the combined acid functionality present in a mixture of an acid-functional silane (or metal salt thereof) and an acid-functional film former with a metal ion. The coupling agent greatly improves bond strength in moist environments and is particularly suitable for use in formulating filled injection molding compositions.

Abstract: This invention provides:A. A polyimide resin composition which comprises at least one polyimide having a repeating unit of the general formula ##STR1## wherein Z is --S--, ##STR2## in which X is --O--, --S-- or ##STR3## Y is a single chemical bond or a bivalent group selected from the group consisting of --O--, --S--, --SO.sub.2 --, ##STR4## and --CO--, and R.sup.1 and R.sup.2 are the same or different and each independently is a hydrogen atom, a halogen atom or a lower alkyl group which may optionally be substituted by a halogen atom or atoms, and having an inherent viscosity (.eta..sub.inh) of about 0.3- about 5.0 dl/g, the polyimide being dissolved in an organic solvent, and a method of producing such composition andB. A polyimide resin composition which is otherwise the same as the above composition but further contains a silane coupling agent added thereto, and a method of producing such composition.

Abstract: This invention provides cured silicone rubber or gel particles exhibiting an average size of from 0.1 to 20,000 micrometers and containing from 0.5 to 70 weight percent, based on the weight of the particle, of entrapped mineral oil. When the particles are incorporated into a liquid or solid matrix material the oil is released from the particles into the matrix at a controlled rate and serves as a lubricating agent.

Abstract: Polyamide-based molding compositions having enhanced flexibility and resilience, especially at low temperatures, are prepared from (1) semirigid copolyamides prepared from fatty acid dimers, (2) elastomers containing moieties compatible or reactive with such copolyamides (1) and comprising olefinic copolymers bearing carboxyl and/or carboxylate groups, copolyester-amides, polyurethanes, organopolysiloxane and polyurethane block copolymers, and copolymers produced from a latex which comprises suitable functional groups, and, optionally, (3) conventional polyamides.

Abstract: There is disclosed a novel phtalic acid ester-modified organopolysiloxane having the general formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a group R.sup.1 or a group with the formula ##STR2## with the proviso that at least one of the groups R.sup.2 in each molecule is the group with the formula ##STR3## in which R.sup.3 is an alkyl group, R.sup.4 is an alkylene group, and m is a positive integer.The organosiloxane is useful as a co-reactant in the preparation of organic resins such as polyesters, polyamides and polyimides.

Abstract: Silicone semi-interpenetrating polymer networks are formed in thermoplastic polymer matrices by the vulcanization of a hydride group-containing silicon with a polymer containing unsaturated groups. The semi-IPN is then cross-linked by hydrolysis of SiOR groups on the polymer network, so that the OR groups are hydrolyzed to allow condensation of silanol groups to form SiOSi cross-links between the chains of the polymer network. Preferably, the polymer containing unsaturated groups in an alkoxysilyl-modified poly 1,2-butadiene. The resulting cross-linked products have improved chemical resistance, increased compressive or tensile strength and excellent temperature resistance and electrical properties for use in applications such as paper-making felts and wire and cable insulation.

Abstract: There is provided a siloxane-imide copolymer composition having at least one polymeric block with a low glass transition temperature and at least one polymeric block with a high glass transition temperature.

Abstract: A method of producing a united product composed of a glass plate and a vinyl chloride resin molded body, which comprises the steps of conducting a preliminary treatment of the periphery of the glass plate for enhancing adhesion; applying a polyamide resin adhesive including silane compound to the preliminarily treated periphery of the glass plate; disposing the glass plate within a cavity of an injection mold; injecting a molten vinyl chloride resin around the periphery of the glass plate within the cavity after clamping the injection mold; and cooling the injection mold, thereby bonding the glass plate and the vinyl chloride resin molded body. And a united product having excellent water resisting qualities, which comprises a glass plate; a vinyl chloride resin molded body; and an epoxidated polyamide adhesive.

Abstract: Thermally stable block copolymers, well adapted for the production of coating films, include recurring imide/amide blocks of the formula: ##STR1## and recurring urea/siloxane blocks of the formula:--NH--CO--NH--A--NH--CO--NH-- (II)wherein A is a divalent diorganosiloxane radical of the formula ##STR2##

Abstract: This invention relates to polyamides which have been modified with special silicone graft rubbers to render them impact resistant and are tough at low temperatures and have high processing stability even at high temperatures and good surface properties.The moulding compounds, which are distinguished by excellent mechanical properties even at low temperatures, consist of at least 40% by weight of polyamide and special graft rubbers with a multishell core/sheath structure having a silicone-based core.

Abstract: A surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of an additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts to the surface of the fiber or film at least one desired characteristic which otherwise would not be present, which composition includes at least one thermoplastic polymer and at least one defined additive. During formation of the fiber or film, the additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the polymeric material, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: A curable composition comprising (a) an amic acid compound and/or an imide compound each containing a silicon atom having at least one hydrolyzable group and (b) an organosilane compound represented by the formula (I): ##STR1## wherein R.sup.1 -R.sub.6, which may be the same or different, are alkyl groups of 1-10 carbon atoms or aryl groups of 6-10 carbon atoms. Said composition is suitably used for the formation of a protective film for a transparent substrate or a color filter in liquid crystal display devices.

Abstract: A stabilized surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of a siloxane-containing primary additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts hydrophilicity to the surface of the fiber or film, which composition includes at least one thermoplastic polymer, at least one siloxane-containing primary additive, and at least one siloxane-containing stabilizing additive. During formation of the fiber or film, the primary additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the primary additive, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000.

Abstract: There is disclosed a thermoplastic resin composition comprising a polyether imide resin (A) and an aromatic polyester-polyorganosiloxane block copolymer (B), the weight ratio of A to B (A/B) being 1/9 to 9/1.

Abstract: A semiconductor encapsulating material is obtained from a polyimide resin composition comprising (A) a polyaminobismaleimide resin, (B) a silicone monomer and/or oligomer having a hydroxyl or alkoxyl group bonded to a silicon atom and mixtures thereof, and (C) an inorganic filler wherein the weight ratio of polyaminobismaleimide resin (A) to silicone component (B) ranges from 99.5/0.5 to 70/30, and the weight ratio of polyaminobismaleimide resin (A) to inorganic filler (C) ranges from 100/50 to 100/1000.

Abstract: A siloxane-amide block copolymer represented by formula (I): ##STR1## wherein the symbols are as defined in the specification, is disclosed. The polymer of formula (I) is produced by reacting a polycondensate of a diaminosiloxane and a dicarboxylic acid dihalide with an epoxysilane to induce ring-opening addition reaction between the terminal amino groups of the polymer and the epoxy group of the epoxysilane. The siloxane-amide block copolymer exhibits excellent processability and reactive curability due to the hydrolyzable silyl groups at the both terminals.

Abstract: Novel ionomeric silane coupling agents are disclosed and their use in bonding a matrix polymer to a mineral substrate is described. The coupling agents comprise amic acid-functional silanes which are partially neutralized with metal cations and are prepared by reacting a mixture of (I) an amine-functional silane, (II) a stoichiometric excess of a dicarboxylic organic acid and (III) an ionic compound containing a metal cation, wherein 10% to 80% of the excess carboxylic acid functionality is neutralized by the metal cations. The coupling agents greatly improve bonding to the matrix polymer in moist environments and are particularly suitable for use in formulating filled injection molding compositions.

Abstract: A novel ionomeric silane coupling agent is disclosed and its use in bonding a matrix polymer to a mineral substrate is described. The coupling agent is prepared by partially neutralizing the combined acid functionality present in a mixture of an acid-functional silane (or metal salt thereof) and an acid-functional film former with a metal ion. The coupling agent greatly improves bond strength in moist environments and is particularly suitable for use in formulating filled injection molding compositions.

Abstract: A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.

Abstract: Thermoplastic compositions and composites are produced which have fewer and smaller voids with more consistent dimensions compared to conventional unreinforced and fiber reinforced thermoplastics. The high modulus thermoplastic contains silicone semi-interpenetrating polymer networks which are formed by vulcanization within the thermoplastic and initiated during melt processing. Parts molded from the compositions are more homogeneous, with evenly distributed voids, thus reducing the possibility of strss fractures. The compositions are particularly useful in the molding in thick cross-section and variable thickness parts and have been found to have increased thermal stability.

Abstract: High modulus thermoplastic compositions and composites are produced which exhibit enhanced melt integrity and strength, allowing the composites to be melt-drawn to smooth surfaced, high tolerance profiles, such as thin-walled tubing, wire, coatings, films, etc. The melt integrity is improved by adding to the thermoplastic prior to or during thermoplastic melt processing a silicone component which will be vulcanized within the thermoplastic to form a silicone semi-interpenetrating polymer network initiated during the melt processing of the thermoplastic. The composition contains about 0.1 to 20, and preferably about 1 to 4 weight percent of the silicone network, and may also contain fibrous reinforcement and/or filler/modifiers.

Abstract: The invention relates to thermoplastic molding compositions showing improved properties, more especially improved dimensional stability and notched impact strength, particularly at low temperatures, in the form of a mixture of at least 35% by weight of a copolyamide containing polydiorganosiloxane carbonamide units and/or of a mixture of partly crystalline polyamides and (co)polyamides containing polydiorganosiloxane carbonamide units and from 1 to 65% by weight of graft products of vinyl polymers on rubbers.The invention also relates to the dimensionally stable molding compositions tough at low temperatures characterized above which additionally contain amorphous siloxane-free polyamides added in quantities of up to 64% by weight.

Abstract: Polyetherimide-silicone copolymer blends are provided having improved resistance to water absorption and a T.sub.g of at least 190.degree. C.

Abstract: A process for producing a silicon-containing polyamic acid of a specified inherent viscosity as a precursor affording polyimide resins having a considerable extent of heat resistance as adhesives or resins for multilayer laminated composite materials, and a good adhesion onto inorganic materials, metals or resins, and a crosslinked silicon-containing polyimide resin prepared from the polyamic acid are provided, which process comprises reacting a tetracarboxylic acid dianhydride of formula (1) (A mols), a diamine of formula (2) (B mols) and an aminosilicon compound of formula (3) (C mols), satisfying the expressions of (4) and (5): ##STR1## wherein R.sup.1 is a tetravalent carboxylic aromatic group; R.sup.2 is an aliphatic, alicyclic, aromatic aliphatic or carboyclic aromatic group each of a specified number of carbon atoms, a specified polysiloxane group, or a formula of ##STR2## wherein R.sup.8 is a specified hydrocarbon group or hydrogen atom; ##STR3## (s: 1 to 4); R.sup.

Abstract: A polymer blend containing a polycarbonate and a siloxane-polyetherimide copolymer. The blends of the invention have improved impact strength, particularly thick section impact strength, over the unmodified polycarbonates. In addition the blends have good physical properties, relatively low flammability and are resistant to environmental stress cracking and crazing.

Abstract: A solid phase N-hydroxysuccinimide reagent having the general formula: ##STR1## where X is particulate silica gel or controlled pore glass; n=3-7; Y is either (CH.sub.2).sub.n' or (CH.sub.2).sub.n' --NH--CO--CH.sub.2 wherein n'=2-6; Z may be in the form of OCOR, OSO.sub.2 R and OCO.sub.2 R, and Z' may be either Z or OH, wherein R is a chromophore, fluorophore or electrophore capable of detection in chromatographic separation technology is disclosed. Also disclosed is the method for making compounds of this type and the method for using these compounds to identify and quantitate analytes having primary or secondary amine or thiol functionalities.

Abstract: The modification of thermoplastic polymers with a combination of azidosilanes and monolefinically unsaturated monomers and subsequent crosslinking by moisture.

Abstract: Curable thermosetting resin compositions comprise a continuous phase of a curable thermosetting organic or a curable thermosetting silicone resin containing dispersed finely divided particles of a cured composition prepared by reacting 1) an organopolysiloxane, 2) a curing agent for the organopolysiloxane, 3) an alkoxy group-containing organosilicon compound and 4) a compound of aluminum or zirconium where this compound is an alkoxide, phenoxide, carboxylate or a derivative of a beta- dicarbonyl compound or o-hydroxyketone. Ingredients 3) and 4) can be prereacted and the cured composition optionally contains a filler. The presence of ingredients 3) and 4) imparts improved adhesion between the continuous an dispersed phases of the composition.

Abstract: A polyetherimide/epoxyimide resin composition prepared by mixing a polyetherimide having a repeating unit represented, for example, by the formula of: ##STR1## with an epoxyimide represented by the following general formula of: ##STR2## wherein R is, for example, selected from the group consisting of diphenyl ether, diphenylmethane, diphenyl sulfone, m-phenylene, p-phenylene and 1,6-hexamehtylene;in a mixing ratio, by weight, of preferably from 6:1 to 1:1. The resin composition is mixed in a solvent to form a solution from which a film may be formed through a flow-coating method. The film made of the polyetherimde/epoxyimide resin composition of the invention, after being removed of the solvent followed by thermal treatment at a temperature of 150.degree. C. to 220.degree. C. for 1 to 3 hours, has improved thermal resistance, adaptability for adhesive, and low moisture permeability.

Abstract: Disclosed herein is a polyamide resin composition comprising a polyamide resin, from 0.1 to 1% by weight of fine silica based on the polyamide resin and from 1 to 99% by weight of a silane coupling agent based on the fine silica. The packaging material obtained from the polyamide resin composition of the present invention has uniform and satisfactory transparency and is excellent in the blocking resistance.

Abstract: Polyimide-siloxanes are provided resulting from the intercondensation of organic diamines with organosiloxanes having terminal silyl-substituted aromatic organic anhydride groups. Semiconductor devices and composites using such polyimidesiloxanes as dielectric or passivating layers, films, adhesives and composites are also provided.

Abstract: A process for the preparation of moulded bodies of thermoplastic polyamides, which comprises intensively mixing a polyamide and a masterbatch, converting the mixture by conventional thermoplast processing to moulded bodies and, before use, conditioning the bodies by contact with ambient moisture or, briefly, with water, in which the masterbatch contains at least 5% by weight of a silane substituted by one, 2 or 3 hydrolysable radicals and a functional group which can undergo a chemical reaction, to form a bond, with amino groups and/or carboxyl groups and/or amide groups in the polyamide chain.

Abstract: A melt processable pseudointerpenetrating network of silicones in thermoplastic matrices and a method of producing same is provided by vulcanizing the silicones within the matrices. In a preferred embodiment a two part silicone comprising silicon hydride groups and silicon vinyl-containing groups are reacted in the presence of a platinum complex. Depending on certain parameters chain-extended (thermoplastic) or cross-linked (thermosetting) compositions are produced.