Abstract: The disclosure provides a polyimide-containing layer suitable for being etched by an alkaline solution and a method for etching a polyimide-containing layer. The polyimide-containing layer suitable for being etched by an alkaline solution includes 20-50 parts by weight of a silica dioxide, and 50-80 parts by weight of a polyimide.

Abstract: The invention relates to a chain guide, respectively a chain tensioner for use in a lubricated sliding system, comprising a surface layer or bearing or comprising a sliding element comprising a surface layer, the surface layer being mainly made of a polymeric material containing a matrix polymer and optionally other components dispersed in said matrix polymer, wherein the matrix polymer consists of a semi-crystalline polyamide (SCPA) having a tensile modulus at 140° C. of at least 800 MPa (measured by the method according to ISO 527-1A). The invention also relates to a power train drive system comprising an engine, a transmission differential and a drive shaft system, a drive chain and a plastic component comprising a sliding element in contact with the lubricated drive chain, wherein the chain guide, the chain tensioner, respectively the sliding element has a coefficient of friction (Co F), measured in lubrication oil at 140° C. at a nominal contact pressure of 1 MPa and a speed of 1 m/s, of at most 0.07.

Abstract: The present disclosure, in one aspect, relates to a polyamide solution including an aromatic polyamide and a solvent, wherein the aromatic polyamide includes at least two types of constitutional units, and a change rate of coefficient of thermal expansion (CTE) of a cast film produced by casting the polyamide solution on a glass plate and CTE of the same cast film after being subjected to a heat treatment at temperature of 200° C. to 450° C. (=CTE after heat treatment/CTE before heat treatment) is 1.3 or less.

Abstract: The present invention is directed to polyamides that are crosslinkable in the presence of water having desirable properties including long open time, good adhesion and cold flexibility. Notably, the polyamides of the present invention are suitable for structural and semi-structural bonding applications utilizing a hot melt process, roll coater or bead extrusion process.

Abstract: The present invention relates to a film for a tire inner liner including a base film layer including a copolymer or a mixture of a polyamide-based resin and a polyether-based resin, and an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive, and having low shrinkage rate when elongated at a high temperature and then cooled to room temperature, and a method for manufacturing the same.

Abstract: A multi-layer film comprising a layer (a) and a layer (c), each layer comprising at least one propylene copolymer in a quantity of at least 30% by weight and at least one propylene homopolymer in a quantity of at least 20% by weight, in each case relative to the total quantity of the layer (a) or (c), at least one inner layer (b) based on at least one homo- and/or co-polyamide having isophorondiamine units as polyamide components, and further comprising adhesion promoter layers (d) and (e) arranged between the layers (a) and (b) and between the layers (b) and (c), respectively, each adhesion promoting layer being based on at least one modified thermoplastic olefin homopolymer or olefin copolymer; a sealing sheet comprising such a multi-layer film, and the use of such a multi-layer film for covering roofs.

Abstract: The present invention is related to 6,7-dihydrobenzimidazo[1,2-c]quinazolin-6-one derivatives of the general structural formula (I), the anisotropic optical film based on these derivatives with phase-retarding properties for displays, and method of producing thereof: where X is a carboxylic group COOH, m is 0, 1, 2 or 3; Y is a sulfonic group SO3H, n is 0, 1, 2 or 3; Z is an acid amide group L-NH2; p is 0, 1, 2 or 3; K is a counterion selected from the list comprising H+, NH4+, Na+, K+, Li+, Mg2+, Ca2+, Zn2+, and Al3+; s is the number of counterions providing neutral state of the molecule; R is a substituent selected from the list comprising CH3, C2H5, NO2, Cl, Br, F, CF3, CN, OH, OCH3, OC2H5, OCOCH3, OCN, SCN, NH2, and NHCOCH3; w is 0, 1, 2, 3 or 4; and R1 is a substituent selected from the list comprising H, CH3, C2H5, C3H7, i-C3H7, CH2CH2CH2CH3, CH(CH3)CH2CH3, CH2CH(CH3)CH3 and C(CH3)3 and L is a linking group.

Abstract: The present invention relates to thermoplastic high-Tg polycarbonates and molding materials which are distinguished by improved thermal properties and improved mechanical properties, in particular by reduced thermal expansion. The present invention furthermore relates to a process for the preparation of these polycarbonates. In particular, this invention relates to polycarbonates which the structural unit which derives from phthalimide of the formula (I) and polycarbonate compositions and molding materials therefrom as well as a process for the preparation of these polycarbonates, and the use thereof, in particular as reflectors and display substrates.

Abstract: A stable solution of a ring-opened polymer is provided. The stable solution can be prepared using the following steps: (d) adding an N,O-heterocyclic compound of formula I or II and a DOPO-based compound into an organic solvent to provide a reaction solution: wherein R1 to R3, W1, W2, m, n, p and q are as defined in the specification. (e) heating the reaction solution to carry out a ring-opening reaction to provide a polymer solution; and (f) cooling the polymer solution to obtain the stable solution, wherein the organic solvent is unreactive to the N,O-heterocyclic compound and the DOPO-based compound, and the amount of the DOPO-based compound is about 0.01 wt % to about 50 wt % based on the total weight of the N,O-heterocyclic compound and the DOPO-based compound. The stable solution is useful as a self-crosslinkable resin or a hardener for hardening epoxies.

Abstract: The present disclosure is directed to a base film having a chemically converted polyimide, a particulate polyimide matting agent and a low conductivity carbon black. The particulate polyimide matting agent is present in an amount from 1.6 to 20 weight percent of the base film.

Abstract: An intermediate transfer member that includes biaryl polycarbonates, an optional polysiloxane, and an optional conductive filler component.

Abstract: Powder compositions and articles and methods of forming articles from powder compositions are provided. The powder compositions include at least one powder that preferably includes an amount of one or more branched polymers such as, for example, one or more branched polyamide polymers. The powder composition is preferably capable of being formed, via a layer-by-layer sintering process such as, for example, selective laser sintering, into a three-dimensional article.

Abstract: A polyamic acid solution includes a polyamic acid, a solvent (C) in which the polyamic acid (PAA1) is dissolved, and a substance (M) that can release at least one metal selected from groups 1 and 2 of the periodic table as a metal ion, or a substance (m) that contains the substance (M). A polyimide composite is produced from the polyamic acid solution. The polyimide composite can provide a greatly improved glass transition temperature without impairing the intrinsic physical properties of the polyimide.

Abstract: In a pneumatic tire containing as an inner liner material a laminate of a film of a thermoplastic resin or a thermoplastic elastomer composition and a layer of a rubber composition for improving the adhesive strength between the film and the rubber composition, the rubber composition comprises 100 parts by weight of a rubber component, 0.5 to 20 parts by weight of a condensate between a compound expressed by formula (1): wherein R1, R2, R3, R4 and R5 are hydrogen, a hydroxyl group or a C1 to C8 alkyl group, and formaldehyde, 0.25 to 200 parts by weight of a methylene donor, and a vulcanizing agent; and a weight ratio of the methylene donor content to the condensate content is 0.5 to 10.

Abstract: The present invention relates to aqueous-based primer composition, comprising at least one thermosetting, self-emulsifying epoxy resin composition; at least one thermosetting, non-self-emulsifying resin composition; water; and at least one curative.

Abstract: Provided are a polyamide resin composition for inner layer of a delamination container which includes a laminate of at least two layers including an outer layer (1) composed of a thermoplastic resin (A) and an inner layer (2) composed of a polyamide resin composition and capable of being delaminated from the outer layer (1) to perform volume reduction deformation and in which an outside air introduction hole for introducing the outside air into between the outer layer (1) and the inner layer (2) is formed in the outer layer (1), the polyamide resin composition containing specified polyamide resin (a) and polyamide resin (b), having a tensile modulus of elasticity of 2,000 MPa or less at a temperature of 23°C. and a humidity of 50% RH, and having a content of the polyamide resin (a) in the polyamide resin composition of 20 to 75% by mass; and a delamination container using the same as an inner layer.

Abstract: Provided herein are a phenolic hydroxyl group-containing aromatic polyamide resin and a resin composition containing the resin, such as an epoxy resin composition containing an epoxy resin. The phenolic hydroxyl group-containing aromatic polyamide resin has a structure represented by the following formula (1): wherein m and n are average values satisfying the following formula: 0.005?n/(m+n)<0.05, m+n is a positive value of 2 to 200, Ar1 is a bivalent aromatic group, Ar2 is a phenolic hydroxyl group-containing bivalent aromatic group, and Ar3 is a bivalent aromatic group. Such a phenolic hydroxyl group-containing aromatic polyamide resin has a low ionic impurity content and improved adhesive properties as well as excellent properties inherent in conventional phenolic hydroxyl group-containing aromatic polyamide resins, such as the ability to allow a cured epoxy resin composition to have excellent flexibility, electrical properties, flame retardancy, and the like.

Abstract: An endless belt comprising a polyimide-based substrate layer. The polyimide-based substrate layer is made by curing a mixture comprising a polyimide precursor and a polyalkylene glycol silicone phosphate. A method of making the polyimide-based substrate layer and a coating composition for making the endless belt are also disclosed.

Abstract: The present invention is directed toward transparent films prepared from soluble aromatic copolyamides with glass transition temperatures greater than 300 C. The copolyamides, which contain pendant carboxylic groups are solution cast into films using N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidinone (NMP), or other polar solvents. The films are thermally cured at temperatures near the copolymer glass transition temperature. After curing, the polymer films display transmittances >80% from 400 to 750 nm, have coefficients of thermal expansion of less than 20 ppm, and are solvent resistant. The films are useful as flexible substrates for microelectronic devices.

Abstract: A process is disclosed for producing moldings, in which a pigmented coating composition (P) and a free-radically crosslinkable coating composition (K), which after crosslinking to completion produces a transparent coating (KE) are applied to a support sheet, wherein a dried but as yet not completely crosslinked coating (KT) is produced from the coating composition (K), the coated support sheet is shaped and is injection backmolded or foam-backed, and the coating (KT) is cured or aftercured; the crosslinkable coating composition (K) comprising a free-radically crosslinkable component (KK) which contains hydrogen bond forming structural elements.