The invention aims to provide a crosslinked polymer having an excellent liquid absorption capacity and sufficient gel-pulverizability. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam-based monomer; and a structural unit derived from triallyl cyanurate, the N-vinyl lactam-based crosslinked polymer containing the structural unit derived from triallyl cyanurate in a ratio of 0.12 to 0.48 mol % to 100 mol % of all structural units.

The invention provides novel bromine-containing polymers which have excellent heat resistance and are capable of imparting flame retardance or novel flame-retardant, bromine-containing polymers which have excellent heat resistance and optical characteristics, and methods for producing such polymers. The invention relates to a polymer which includes structural units of the following general formula (1): ##STR00001##
wherein R.sub.1s, R.sub.2s, m, p and the asterisks are as defined in the specification and the claims, and
to a method for producing such polymers.

The invention provides novel bromine-containing polymers which have excellent heat resistance and are capable of imparting flame retardance or novel flame-retardant, bromine-containing polymers which have excellent heat resistance and optical characteristics, and methods for producing such polymers. The invention relates to a polymer which includes structural units of the following general formula (1): ##STR00001##
wherein R.sub.1s, R.sub.2s, m, p and the asterisks are as defined in the specification and the claims, and
to a method for producing such polymers.

The invention aims to provide a crosslinked polymer having excellent moisture retention properties, an excellent ethanol absorption capacity, excellent adhesiveness to the skin when applied to the skin as a cosmetic, and a high concentration of an effective component. The invention relates to a N-vinyl lactam-based crosslinked polymer including: a structural unit derived from a N-vinyl lactam; and a structural unit derived from a crosslinking agent, the N-vinyl lactam-based crosslinked polymer having an ethanol absorption capacity of 3 to 40 g per 1 g of the N-vinyl lactam-based crosslinked polymer, the N-vinyl lactam-based crosslinked polymer containing a particle having an aspect ratio determined by the following method of 1.15 to 10 in a proportion of 10% to 100% (by number) of the total number of the N-vinyl lactam-based crosslinked polymer and having a proportion of an extractable of 35 mass % or less in 100 mass % of the entire polymer, the method being method of measuring aspect ratio in which the aspect ratio is determined as a value obtained by measuring the major and minor axes of a primary particle of the N-vinyl lactam-based cross-linked polymer with an optical or electron microscope and dividing the major axis by the minor axis.

A cleaning solution that is used, inter alia, for removal of residue of a photoresist pattern or etching residue, and has exceptional anticorrosion properties with respect to silicon nitride; and a method for cleaning a substrate using the cleaning solution. In a cleaning solution containing a hydrofluoric acid and a solvent, a polymer that includes units derived from a compound of a specific structure having a carboxylic acid amide bond (CON<) and an unsaturated double bond is blended as an anticorrosive agent. Polyvinylpyrrolidone is preferred as the polymer used as the anticorrosive agent.

The invention aims to provide an absorbent composite having an excellent absorption capacity for various liquids. The invention relates to an absorbent composite including: a nonionic crosslinked polymer; and an absorbent base material, the absorbent composite having a mass ratio of the nonionic crosslinked polymer to the absorbent base material (nonionic crosslinked polymer/absorbent base material) of 0.1 or more and less than 2.

The invention aims to provide an absorbent composite having an excellent absorption capacity for various liquids. The invention relates to an absorbent composite including: a nonionic crosslinked polymer; and an absorbent base material, the absorbent composite having a mass ratio of the nonionic crosslinked polymer to the absorbent base material (nonionic crosslinked polymer/absorbent base material) of 0.1 or more and less than 2.

This invention relates to end-functionalized living polymers or copolymers having a structure represented by the general formula 1 or 2, wherein R.sub.1 is a hydrogen atom, a methyl group, or a radically non-polymerizable organic group containing 1 to 20 carbon atoms. R.sub.2 is a functional end group of a vinyl hetero monomer selected from the group consisting of hydroxy, epoxy, silyl, NH.sub.2, NH(C.sub.1-C.sub.6alkyl), N(C.sub.1-C.sub.6alkyl).sub.2, CHCH.sub.2, CCH, C(CH.sub.3)CH.sub.2, OCHCH.sub.2, (OCH.sub.2CH.sub.2).sub.1-10OH, OR.sub.20, COOR.sub.20, CONHR.sub.20, OCONHR.sub.20, OCOR.sub.20 and NHCOR.sub.20, wherein R.sub.20 is linear or branched C.sub.1-C.sub.20 alkyl or linear or branched C.sub.1-C.sub.20 alkyl substituted with hydroxy, epoxy, silyl, NH.sub.2 or N(C.sub.1-C.sub.6alkyl).sub.2; or R.sub.20 is phenyl, benzyl, CHCH.sub.2, CCH or C(CH.sub.3)CH.sub.2, or R.sub.2 is a residue of an acrylic acid (CH.sub.2CHCOO*), methacrylic acid, (CH.sub.2C(CH.sub.3)COO*) or CH(CH.sub.3)CHCOO* or R.sub.2 is a residue of a dicarboxylic acid HOOCR.sub.cCOO* or C.sub.1-C.sub.6alkyl-OOCR.sub.cCOO* wherein R.sub.c is C.sub.1-C.sub.20 alkylene, C.sub.1-C.sub.20alkenylene or phenylene; or R.sub.2 is a residue derived from the reaction of an isocyanate R.sub.aNCO with the hydroxy group or with the amine group of the vinyl hetero monomer, said residue being R.sub.aNHCOO* or R.sub.aNHCONH* wherein R.sub.a is unsubstituted C.sub.1-C.sub.20alkyl, C.sub.1-C.sub.20cycloalkyl or C.sub.1-C.sub.20alkyl substituted with hydroxy, epoxy, silyl, NH.sub.2, NH(C.sub.1-C.sub.6alkyl) or N(C.sub.1-C.sub.6alkyl).sub.2; or R.sub.2 is a residue derived from the reaction of a diisocyanate residue OCNR.sub.bNCO with the hydroxy group or with the amine group of the vinyl hetero monomer, said residue being *OOCNHR.sub.bNCO or *HNOCNHR.sub.bNCO or *OOCNHR.sub.bNHCOR.sub.30 wherein R.sub.b is C.sub.1-C.sub.20 alkylene or C.sub.1-C.sub.20cycloalkylene or phenylene and R.sub.30 is a residue of hydroxyethylacrylate (CH.sub.2CHCOO(CH.sub.2).sub.2O*), hydroxyethylmethacrylate (CH.sub.2C(CH.sub.3)COO(CH.sub.2).sub.2O*), hydroxybutylacrylate (CH.sub.2CHCOO(CH.sub.2).sub.4O*) or hydroxybutylmethacrylate (CH.sub.2C(CH.sub.3)COO(CH.sub.2).sub.4O*), A is the hetero atom of the vinyl hetero monomer selected from the group consisting of oxygen, nitrogen, sulfur and silicon; and if R.sub.2 is silyl and M is a direct bond, A is a direct bond; M is a bond or a divalent group linking the heteroatom of the vinyl hetero monomer and the functional end group of the vinyl hetero monomer said M being selected from the group consisting of C.sub.1-50 alkylene, C.sub.1-50 (hetero)alkylene, arylene and heteroarylen

The present application relates to an amphiphilic polymer and a method of preparing the same. Furthermore, the present application relates to a micelle including a drug encapsulated by the amphiphilic polymer and a composition including the same. The amphiphilic polymer according to the present application has excellent drug encapsulation properties as well as good dispersion properties in an aqueous solution.

The present application relates to an amphiphilic polymer and a method of preparing the same. Furthermore, the present application relates to a micelle including a drug encapsulated by the amphiphilic polymer and a composition including the same. The amphiphilic polymer according to the present application has excellent drug encapsulation properties as well as good dispersion properties in an aqueous solution.