Abstract: Polymerized fatty acid-based polyamides may be combined with low polarity and high polarity co-solvents to produce homogeneous water-in-oil emulsions. These emulsions have the appearance of white or translucent creams, with stiffnessranging from soft and greasy, to hard and able to support weight. These emulsions are stable in the presence or absence of surfactant, and are formed easily by mixing components with heat and then cooling. These emulsions are useful in applications favoring an oil base, such as skin creams and cosmetics with emulsions of low stiffness, and car polish with emulsions of greater stiffness.

Abstract: Polyetherpolyamide elastomer showing a low water absorption, a high stress relaxation, and a high elastic recovery percentage of elongation is obtainable by polymerizing an aminocarboxylic acid compound and/or a lactam compound, a triblock polyetherdiamine compound having the following formula, and a dicarboxylic acid compound: [x is a value of 1 to 20, y is a value of 4 to 50, z is a value of 1 to 20].

Abstract: The invention relates to modified polyamides, and more particularly to polyamides containing units of the type obtained by reacting a diacid with a diamine, modified with a multifunctional compound. The finished articles shaped from these polyamides or from compositions based on these polyamides have excellent mechanical properties and also a very good surface aspect. The modified polyamide according to the invention is obtained by melt-blending polyamides of different natures, in the presence of a multifunctional compound.

Abstract: Sulfonated condensation products that are stable in storage and have increased thermal stability are based on aminoplastic formers having at least two amino groups or naphthalene and formaldehyde and, optionally include organic nitrogen bases which additionally contain, as nitrogenous formulation auxiliary agents, compounds of general formula (I) R1—NH—X—Y—R2, wherein R1 and R2 independently represent H, —CH3, —C2H5, —C3H7, —(CH2)n—CH2—; X?—CH2, CO, CS; Y?S, NH, —(CH2)m—; n=0 to 9; m=1 to 4; and/or compounds of general formula (II), wherein Z?—OCH3, —SO3—H, —SO3Na+, —NO2, —NH2, —NH—NH2, —CO2—Na+, —CHO. The mole ratio of aminoplastic formers: formaldehyde: sulfite: nitrogenous formulation auxiliary agents rangin from 1:1.9 to 6.0:1.0 to 2.0:0.01 to 1.5 and/or the mole ratio of naphthalene sulfonic acid: formaldehyde; nitrogenous formulation auxiliary agents equals 1:0.7 to 3.0:0.01 to 1.5. Method for preparing these condensation products of using them, e.g.

Abstract: A polyimide is disclosed of the formula: CG1 and CG2 are independently electron-accepting and/or electron-donating groups; x is an integer from about 3 to about 3000; ODAH is any of a number of known dianhydride residues; ODAM is any of a number of known diamine residues; and m, n, o, and p cumulatively add to 1.0, with the sum of m and n ranging from about 0.05 to about 1.0, the sum of o and p ranging from about 0 to about 0.95, the sum of m and o being about 0.5 and the sum of n and p being about 0.5. In addition, a film structure comprising the polyimide and devices utilizing the film structure are disclosed.

Abstract: An organic polymer having a plurality of regions along the length of the polymer backbone and comprising two or more of the following a first region for transporting negative charge carriers and having a first bandgap defined by a first LUMO level and a first HOMO level; and a second region for transporting positive charge carriers and having a second bandgap defined by a second LUMO level and a second HOMO level; and a third region for accepting and combining positive and negative charge carriers to generate light and having a third bandgap defined by a third LUMO level and a third HOMO level, wherein each region comprises one or more monomers and the quantity arrangement of the monomers in the organic polymer is selected so that the first, second and third bandgaps are distinct from one another in the polymer.

Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.

Abstract: Anaerobically curable compositions comprising: (a) a polymerizable monomer having a functional group represented by the general formula: H2C=C(R)? (wherein R is a hydrogen atom or a methyl group) at a terminal of its molecule; (b) an organic peroxide; (c) o-benzoic sulfimide; and (d) a salt selected from the group consisting of sodium salts, potassium salts and calcium salts of weakly acidic substances, have a high curing rate and high bonding strength despite of having high storage stability. In particular, the composition can rapidly bond even adherends such as inactive metals and plastics, with which conventional anaerobically curable compositions are hardly cured.

Abstract: In a step of polymerizing polyamic acid by mixing tetracarboxylic acid dianhydride and diamine and polycondensating the tetracarboxylic acid dianhydride and diamine under the presence of a polymerization-use solvent, a tetracarboxylic acid dianhydride slurry in which a tetracarboxylic acid dianhydride is dispersed in a dispersion medium is used. According to this, it is possible to directly manufacture a polyamic acid solution having a high concentration of polyamic acid more than or equal to 10% by weight. Especially, even if a tetracarboxylic acid dianhydride having low solubility in the polymerization-use solvent, it is possible to effectively manufacture a polyamic acid solution having high solids content, by a simple process and in a short time.

Abstract: Copolyetherimides comprise phthalimide structural units comprising both 3- and 4-linkages, wherein the designations 3-linkage and 4-linkage refer to the isomeric positions on the phthalimide ring in the totality of phthalimide-comprising structural units in the copolymer. The products have excellent properties, including high glass transition and heat distortion temperatures, high ductility and good melt flow properties, and low polydispersity.

Abstract: The invention relates to a liquid initiator to be used in anionic lactam polymerization. Said liquid initiator contains a reaction product of carbodiimide with a protic compound and a base in an aprotic solvation agent.

Abstract: The polyamide resin of the present invention is produced by polycondensation of a diamine component comprising 70 mol % or more of m-xylylenediamine and a dicarboxylic acid component comprising 70 mol % or more of a C4-C20 ?, ?-straight-chain aliphatic dicarboxylic acid in the presence of at least one phosphorus compound selected from the group consisting of phosphinic acid compounds and phosphonous acid compounds and in the presence of an alkali metal compound of a weak acid. The weak acid has a dissociation constant lower than a first dissociation constant of a dicarboxylic acid mainly constituting the polyamide resin. The polyamide resin satisfies the following requirements (A), (B) and (C): 14000?a?40000??(A) b?1.000??(B) 0.9930?b?1.1a2×10?11+3.2a×10?7?0.9980??(C) wherein a and b are as defined in the disclosure.

Abstract: An aromatic polyimide film for producing an electro-conductive sealing element of a packaged semi-conductor device, has a thickness of 20 to 60 ?m, a moisture vapor transmission coefficient of 0.05 to 0.8 g/mm/m2·24 hrs, a water absorption ratio of 2.0% or less, and an elastic modulus in tension of 5,000 MPa or more, in which a surface of the polyimide film has been treated with reduced-pressure plasma discharge.

Abstract: A method for preparing a nylon 6 copolymer containing dimeric acid comonomers. The method includes reacting 80.0˜99.9 mol % of caprolactam, 0.1˜3.0 mol % of dimeric acid and 0.1˜3.0 mol % of 2-methyl-1,5-pentadiamine in a polymerization reaction. Moreover, the invention provides a method for preparing a nylon 66 copolymer containing dimeric acid comonomers, which comprising reacting 60.0˜90 mol % of hexadiacid and hexadiamine, 0.1˜3.0 mol % of dimeric acid and 0.1-3.0 mol % of 2-methyl-1,5-pentadiamine in a polymerization reaction. The reaction temperature for both of the methods are at 200˜280° C.

Abstract: A reinforced polyamide molding composition is disclosed. Characterized in that its viscosity at a shear velocity of 10 s−1 is greater than 1000 Pas and a shear velocity of 1000 s−1 is less than 300 Pas, at processing temperatures of 40 to 80° C. above its melting point, the composition is particularly suitable for thermoforming applications.

Abstract: A photoactive polymer from the class of polyimides, polyamide acids and esters thereof comprises as a side-chain a photocrosslinkable group of the general formula (I) wherein the broken line indicates the point of linkage to the polyimide main chain and wherein: B is a straight-chain or branched alkyl residue which is optionally substituted, wherein one or more non-adjacent CH2 groups may independently be replaced by a group Q; D represents an oxygen atom or —NR1— wherein R1 represents a hydrogen atom or lower alkyl; and S3 represents a spacer unit. The polymers may be used as orientation layers for liquid crystals and in the construction of unstructured and structured optical elements and multi-layer systems.

Abstract: The present invention is directed to a process for making an absorbable polylactone copolymer prepared in part from about 2 to about 80 mole percent glycolide, which process utilizes a combination of a monofunctional polymerization initiator and a di-functional polymerization initiator, to achieve rates of crystallization of the copolymer of at least about 2 times faster than the rate of crystallization of a copolymer made by a similar process utilizing either the mono-functional or the di-functional polymerization initiator alone. Absorbable polylactone copolymers prepared by such processes and medical devices containing such copolymers are also disclosed.

Abstract: The invention relates to a process for the preparation of a polyamide comprising at least a step in which a composition that comprises at least (a) a primary aminocarbonamide and (b) an aminocarboxylic acid and/or a lactam is polymerised, said composition comprising at least (a) 10-90 wt. % primary aminocarbonamide; (b) 10-90 wt. % aminocarboxylic acid and/or lactam; (c) 0-4 wt. % water; the amounts being relative to the sum of the compounds (a+b+c). Preferably the sum of the compounds (a+b+c) is at least 75 wt. % of the total composition, more preferably 85 wt. %, most preferably 90 wt. %. The polyamide obtained with the process has a &eegr;rel of more than 2.2. The process is eminently suitable for the preparation of polyamide-6 (polycapronamide) from a composition comprising 6-aminocapronamide, 6-aminocaproic acid and/or &egr;-caprolactam. This composition is preferably obtained via the reductive amination of a 5-formylyalerate ester, preferably 5-formylmethylvalerate in water.

Abstract: An aromatic polyimide ester having a small coefficient of linear expansion, small water absorbing property, and excellent heat resistance. The aromatic polyimide ester comprising: a repeating unit represented by a following formula (I), a repeating unit represented by a following formula (II), (n represents 0 or 1) a repeating unit represented by a following formula (III), and a repeating unit represented by a following formula (IV), (-A- represents —O— or —CO—, and is located in para-position or meta position to imido group, and X represents direct coupling, —O—, —S—, or —SO2—) and the repeating units are mutually bonded with each other through ester-bonds.

Abstract: A host-guest polymer system including a polymer with an isoimide group and an organic chromophore and capable of converting into a side-chain polymer system, a side-chain nonlinear optical polymer derived from the host-guest polymer system, and a method for synthesizing the side-chain nonlinear optical polymer are provided. The method for synthesizing the side-chain nonlinear optical polymer involves forming a nonlinear optical polymer film based on a host-guest system in which an organic chromophore having a reactive group capable of nucleophilic reaction with an isoimide group is dispersed in a matrix including a polymer with the isoimide group having the following formula: Next, the nonlinear optical film is poled at a first temperature in an electric field; and the organic chromophore is reacted with the polymer while poling at a second temperature which is higher than the first temperature, to synthesize the side-chain nonlinear optical polymer.