Abstract: An ink composition comprising (a) water, (b) pigment particles, (c) at least one humectant, (d) at least one polyurethane having an average molecular weight of at least about 10,000 and a sufficient number of acid groups to provide an acid number from 60 to about 130, and being present at a weight concentration of greater than 0.7%, and (e) at least one water soluble acrylic polymer comprising carboxylic acid groups, present at a weight concentration of greater than 0.6%, wherein the acid groups on the polyurethane and acrylic polymers are at least partially neutralized only with a monovalent inorganic base.

Abstract: An ink composition comprising (a) water, (b) pigment particles, (c) at least one humectant, (d) at least one polyurethane having an average molecular weight of at least about 10,000 and a sufficient number of acid groups to provide an acid number from 60 to about 130, and being present at a weight concentration of greater than 0.7%, and (e) at least one water soluble acrylic polyiner comprising carboxylic acid groups, present at a weight concentration of greater than 0.6%, wherein the acid groups on the polyurethane and acrylic polymers are at least partially neutralized only with a monovalent inorganic base.

Abstract: This invention relates to a PET-based photographic multilayer film base having improved properties with regard to cutting, stiffness and post-process curl. In particular, the polyester film base comprises a biaxially-stretched multilayer film structure, in which layers a specified amount of monomeric units derived from 1,4-cyclohexanedimethanol (CHDM), sulfonic-acid-substituted aromatic dicarboxylic acid and poly(alkylene glycol) is present.

Abstract: A method for blending poly(ether imide)s with polyesters comprising: (a) adding polyester monomers and poly(ether imide) in a polymerization reactor at any point during a polyester polymerization process; and (b) polymerizing the polyester monomers in the presence of the poly(ether imide) under standard conditions to produce a blend.

Abstract: A method for blending poly(ether imide)s with polyesters comprising: (a) adding polyester monomers and poly(ether imide) in a polymerization reactor at any point during a polyester polymerization process; and (b) polymerizing the polyester monomers in the presence of the poly(ether imide) under standard conditions to produce a blend.

Abstract: A copolyester is synthesized by reacting a dialkyl ester of an aromatic dicarboxylic acid (e.g., dimethyl terephthalate) with ethylene glycol, low molecular weight poly(ethylene glycol) and a salt of a sulfonic acid-substituted aromatic dicarboxylate (e.g., sodium sulfoisophthalic acid) simultaneously in a first stage reaction in the presence of a phosphite or phosphate stabilizer. The intermediate product of the first stage is further reacted in a second stage in the presence of a polycondensation catalyst to obtain a random copolyester of the desired molecular weight. The copolyester is extruded to form a film which, after orientation and heat setting, has excellent clarity and is useful as a photographic film support. Aqueous processing of the film relaxes any core set or curl.