Described herein are ortho-dimethyl-substituted and tetramethyi-substituted triptycene-containing diamine monomers and microporous triptycene-based poiyimides and poiyamides, and methods of making the monomers and polymers.

The invention aims to provide a photosensitive colored resin composition and a heat resistant colored resin film produced therefrom that has the function of absorbing light in the shorter visible wavelength range with high sensitivity to serve effectively as planarizing film, insulation layer, and barrier rib used in organic luminescence apparatuses and display elements and the function of reducing external light reflection. The photosensitive colored resin composition includes an alkali-soluble resin (a), a photosensitive compound (b), and a compound (c) having an absorption maximum in the wavelength range of 400 nm or more and less than 490 nm, the photosensitive compound (b) containing a photosensitive compound (b1), the photosensitive compound (b1) being such that its maximum absorption wavelength in the range of 350 nm or more and 450 nm or less is located within the wavelength range of 350 nm or more and 390 nm or less.

A salt composition includes at least one ammonium carboxylate salt obtained from: (a) at least one aromatic compound comprising 2 anhydride functional groups and/or its carboxylic acid and/or ester derivatives; and (b) one or more aliphatic diamines in which said aliphatic diamine or diamines are chosen from the diamines of formula (I) NH.sub.2RNH.sub.2 with R being a saturated aliphatic divalent hydrocarbon radical, the two amine functional groups of which are separated by 4 to 6 carbon atoms and 1 or 2 hydrogen atoms of the divalent radical of which are replaced by 1 or 2 methyl and/or ethyl groups; and optionally the diamines of formula (II) NH.sub.2RNH.sub.2 with R being a saturated or unsaturated and aliphatic, cycloaliphatic or arylaliphatic divalent hydrocarbon radical, which optionally comprises heteroatoms; and at least one chain-limiting compound chosen from monoamines, monoacids or diacids in the , positions.

A method of producing a joined body includes: providing a composition for transient liquid phase sintering to at least one of a portion of a first member to which a second member is to be joined and a portion of the second member to which the first member is to be joined, so as to form a composition layer; bringing the portion of the first member to which the second member is to be joined and the portion of the second member to which the first member is to be joined into contact with each other via the composition layer; and sintering the composition layer by heating, and the composition for transient liquid phase sintering includes metal particles capable of transient liquid phase sintering and a thermoplastic resin.

A polyimide resin including a structural unit A derived from a tetracarboxylic dianhydride and a structural unit B derived from a diamine compound, wherein the structural unit A includes a structural unit (A-1) derived from a compound represented by the following formula (a-1), and the structural unit B includes a structural unit (B-1) derived from a compound represented by the following formula (b-1):

##STR00001##

wherein m and n in the formula (b-1) each independently are an integer of 0 or 1.

This invention relates to a (meth)acrylate-functionalized poly(meth)acrylate-block-polyimide-block-poly(meth)acrylate copolymer, preparation method and use thereof. The (meth)acrylate-functionalized poly(meth)acrylate-block-polyimide-block-poly(meth)acrylate copolymer according to the present invention exhibits outstanding thermal stability and excellent optical properties.

A liquid crystal aligning agent which contains a polymer (A) and a polymer (B). Polymer (A): A polymer which has at least one structural unit U1 selected from the group consisting of structural units represented by formula (1) and structural units represented by formula (2), and a structural unit U2 derived from at least one monomer selected from the group consisting of styrene monomers and (meth)acrylic monomers. Polymer (B): At least one polymer selected from the group consisting of polyamic acids, polyamic acid esters and polyimides. In the formulae, R.sup.7 represents a monovalent organic group having one or more carbon atoms; R.sup.8 represents a monovalent organic group having one or more carbon atoms; and R.sup.9 represents a hydrogen atom or a monovalent organic group having one or more carbon atoms.

An alignment film composition includes a copolymer of a dianhydride-based compound and a diamine-based compound, and a cross-linker. The copolymer has a structure represented by Chemical Formula Ia or Chemical Formula Ib, and the cross-linker is represented by Chemical Formula IIa or Chemical Formula IIb: ##STR00001##

A purpose of the present invention is to provide a binder composition for a secondary battery which can impart excellent battery characteristics, even when the heat treatment temperature is low. The binder composition for a secondary battery according to the present invention is characterized by comprising a polyamic acid comprising a repeating unit represented by chemical formula (1) and an aromatic compound comprising an electron donating group and an organic acid group,

##STR00001##

wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.

Problem: The invention provides a polyimide precursor as well as a resin composition thereof that is excellent in coating properties of slit coating as well as productivity and also excellent in optical properties that are required for applications of flexible substrates.

Solution: The polyimide precursor comprises a structure unit derived from a fluorene backbone and a silicon-containing structure unit, and a weight-average molecular weight of the polyimide precursor is 90,000 to 250,000.