Novel aromatic polyimides, both thermoplastic and thermosettable, are disclosed based on use of asymmetric diamines and symmetric dianhydrides with either a functional endcap for further thermosetting or a non-functional endcap for retention of thermoplastic properties. Both aromatic polyimides have sufficient physical properties to be useful in 3D printing.

The present invention provides a polyimide precursor that serves to produce a cured film that has high light permeability in combination with low birefringence and low linear thermal expansion. The polyimide precursor includes at least an acid dianhydride residue as represented by Formula (1), a diamine residue as represented by Formula (2), and one or more diamine residues as represented by Formula (3), the acid dianhydride residue as represented by Formula (1) accounting for 50 mol % or more of the total quantity of acid dianhydride residues in the polyimide precursor, the diamine residue as represented by Formula (2) accounting for 50 mol % or more of the total quantity of diamine residues in the polyimide precursor, and the diamine residue as represented by Formula (3) accounting for 15 mol % or less of the total quantity of diamine residues in the polyimide precursor.

A poly(etherimide) includes repeating units derived from polymerization of a biphenol dianhydride and an organic diamine. A method of making the poly(etherimide) includes contacting the biphenol dianhydride and the organic diamine under conditions effective to provide a poly(etherimide). The poly(etherimide) can be useful in a variety of articles, for example in an optoelectronic component.

A method for producing a polyimide resin film, including: a coating step of forming a coated film by coating a polyimide resin composition containing a polyimide resin, an antioxidant, and a solvent on a substrate; and a drying step of drying the coated film in air at 180° C. or more, the antioxidant being a phenol-based antioxidant, and a content of the phenol-based antioxidant being 0.05 part by mass or more per 100 parts by mass of the polyimide resin.

A varnish includes an isolated as-synthesized polyetherimide having a glass transition temperature of 180° C. or more, a solvent in an amount effective for the polyetherimide to remain in solution at a selected temperature, and an inorganic particulate composition wherein the amount of polyetherimide, inorganic particulate composition, and solvent total 100 wt %. Also disclosed is a method of manufacturing the varnish, articles prepared from the varnish, and methods of manufacturing such articles.

The present invention is a substrate for a display, the substrate having a film B including a polysiloxane resin on at least one surface of a film A including a polyimide resin, wherein the film B contains inorganic oxide particles therein, and the present invention has an object to provide a substrate for a display: being able to be applied to a color filter, an organic EL element, or the like without the need to carry out any complex operations; allowing high-definition displays to be manufactured; and being provided with a low CTE, a low birefringence, and flexibility.

A photo-aligning liquid crystal alignment layer formed by using a photo-aligning liquid crystal aligning agent containing polyamic acid or a derivative thereof which is synthesized by using tetracarboxylic acid dianhydride having no photoreactive structure having a specific structure and diamine having no photoreactive structure having a specific structure together with at least one of tetracarboxylic acid dianhydride having a photoreactive structure and diamine having a photoreactive structure can reduce storage of residual DC in a liquid crystal display device. Further, the above alignment layer can shorten the relaxation time and can prevent afterimages from being generated.

A polyimide precursor comprising at least one repeating unit represented by the following chemical formula (5): ##STR00001##
in which A.sub.3 is a divalent group of an aromatic diamine or an aliphatic diamine, from which amino groups have been removed; and X.sub.3 and Y.sub.3 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms, and/or at least one repeating unit represented by the following chemical formula (6): ##STR00002##
in which A.sub.3 is a divalent group of an aromatic diamine or an aliphatic diamine, from which amino groups have been removed; and X.sub.4 and Y.sub.4 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms.

A polymer, a composition, and a polysiloxane-polyimide material thereof are provided. The polymer includes a first repeat unit and a second repeat unit. The first repeat unit has a structure represented by Formula (I) and the second repeat unit has a structure represented by Formula (II) ##STR00001##
wherein A.sup.1 and A.sup.3 are independently tetravalent moiety; A.sup.2 is a divalent moiety; n≥1; m≥1; R.sup.1 is independently hydrogen, C.sub.1-8 alkyl, C.sub.1-8 fluoroalkyl, C.sub.1-8 alkoxy, or C.sub.6-12 aryl; and R.sup.2 is independently hydrogen, C.sub.1-8 alkyl, C.sub.1-8 fluoroalkyl, C.sub.1-8 alkoxy, C.sub.6-12 aryl, or a reactive functional group.

Provided are a solid electrolyte composition containing an inorganic solid electrolyte (A) having a conductivity of an ion of a metal belonging to Group I or II of the periodic table and a binder (B), in which the binder (B) is a polymer having at least one bond of a urethane bond, a urea bond, an amide bond, an imide bond, or an ester bond in a main chain and having a graft structure, a solid electrolyte-containing sheet and a manufacturing method therefor, an all-solid state secondary battery and a manufacturing method therefor, and a polymer having a specific hard segment and a graft structure and a non-aqueous solvent dispersion thereof.