The unsaturated dicarboxylic anhydride preferably is maleic anhydride.

A plasticizer which is comprised of a secondary alcohol alkoxylate ester of a dicarboxylic or polycarboxylic acid or anhydride.

It is preferable that the modified copolymer be a modified alternating copolymer of C4 olefin and an α,β-unsaturated dicarboxylic anhydride or a derivative thereof.

The resin composition comprises (A) a styrene resin, (B) an aliphatic polyester, and at least one member selected between (C) a compatibilizing agent and (D) a dicarboxylic anhydride.

An aqueous composition comprising an alkanol amine salt of an aliphatic dicarboxylic acid or anhydride, and alkanol amine, a chelating agent and water is described.

A C6-10 aliphatic monocarboxylic acid and/or an unsubstituted aliphatic dicarboxylic anhydride are used as the deprotecting agent (A) for the metal nanoparticles, and polyalkylene glycol is used as the organic solvent (B).

The unsaturated dicarboxylic anhydride preferably is maleic anhydride.

This copoylmer is reacted with a dicarboxylic acid anhdride comprising at least about 50% by weight of an alkyl hexahydrophthalic anhydride.

The second catalyst can include a dicarboxylic acid, an anhydride, a dihydroxybenzene, or any mixture thereof.

The amount of dicarboxylic acid anhydride present is such to provide between about 1.0 and 1.2 anhydride groups for each epoxide group on the acrylic copolymer.

A plasticizer which is comprised of a secondary alcohol alkoxylate ester of a dicarboxylic or polycarboxylic acid or anhydride.

They are derived from polyols and a dicarboxylic acid or carboxylic acid anhydride.

These are derived from polyols and a di-carboxylic acid or carboxylic acid anhydride.

These are derived from polyols and a dicarboxylic acid or carboxylic acid anhydride.

Disclosed is a process for producing water-insoluble cellulose fibers having high carboxyl content by reacting cellulose fiber in suspension with dicarboxylic acid anhydride or chloride in the presence of a basic catalyst.