Abstract: A physical property-improving reagent which comprises an alkenoylcarbamate compound of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group, X is an oxygen atom (--O--), a sulfur atom (--S--) or a substituted or unsubstituted imino group (--NR'--), R' being a hydrogen atom or a lower alkyl group, and Y is the residue of an active hydrogen atom-containing compound excluding --X-H therefrom dissolved in an organic solvent having a solubility parameter of not less than 8, which can impact excellent physical properties to a polymer produced with the same.

Abstract: A polymer comprising a carbon-carbon backbone chain and at least one N-(substituted oxalyl)carbamoyl group of the formula: --CO--NH--CO--CO--OR wherein R is a hydrocarbon group as a side chain attached to said backbone chain.

Abstract: A curable composition which comprises a polymerizable compound having an acylurethane group of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group and ##STR2## is the residue of a hydroxyl group-containing compound excluding a hydroxyl group therefrom, at least 1/10 of the total hydroxyl groups in the hydroxyl group-containing compound being substituted with said acylurethane group.

Abstract: A reactive acrylic resin micro-particle comprising a particulate body resin and a number of linear segments attached to said body resin and extending outwardly therefrom, said particulate body resin being composed of an internally gellated acrylic resin and having a mean grain diameter of 0.01 to 20 .mu. and said linear segments each being composed of a linear carbon chain of 1 to 100 carbon atoms, which may be interrupted by an oxygen, sulfur or nitrogen atom, which is connected at one end to said particulated body resin through a urethane, acyl urethane, urea or acyl urea bond and possessed of at the other end an ethylenically unsaturated bond. The invention also includes the preparation of said microparticles and a curable acrylic composition containing said microparticles, at least one polymerizable monomer or oligomer and a polymerization initiator.

Abstract: A curable composition which comprises as the essential components (A) a polymer having a main chain comprising carbon-carbon bonds and an isocyanatocarbonyl group as a pendant to the main chain, the content of the isocyanatocarbonyl groups present in the molecule of the polymer being from 0.1 to 72.2% by weight, and (B) an active hydrogen atom-containing compound which has one or more active hydrogen atoms in the molecule.

Abstract: A process for preparing alkenoyl isocyanates of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group which comprises subjecting an oxazolinedione hydrohalide of the formula: ##STR2## wherein X is a halogen atom and R is as defined above to decomposition under an ordinary pressure, in the presence of a hydrogen halide-eliminating agent and/or in a liquid medium having a dielectric constant of not more than 4.

Abstract: A functional polymer having a main chain of carbon-carbon bonds and at least one functional group appended to the main chain with intervention of a carbonyliminocarbonyl linkage, the functional group being any one chosen from the group consisting of a fluorinated group, an aminotriazine group, a photosensitive group and a bicyclo or spiro structure group and the content of the functional groups including the carbonyliminocarbonyl linkage in the molecule of the functional polymer being from 0.1 to 99.9% by weight.