Abstract: The invention relates to low-temperature curable photosensitive compositions containing a polyamic acid, which compositions are developable in aqueous alkaline solutions and are curable, at a temperature of at least 160° C. and up to 200° C., to low modulus polyimides suitable for use in electronic circuitry applications, and which are particularly suitable for use in flexible circuit applications where low curl, low temperature curing, and good adhesion is a significant advantage.

Abstract: The invention relates to low-temperature curable photosensitive compositions containing a polyamic acid, which compositions are developable in aqueous alkaline solutions and are curable, at a temperature of at least 160° C. and up to 200° C., to low modulus polyimides suitable for use in electronic circuitry applications, and which are particularly suitable for use in flexible circuit applications where low curl, low temperature curing, and good adhesion is a significant advantage.

Abstract: A method for preparing high resolution, negative-working, wash-off relief images, preferably using ink jet printing, comprising the sequential steps of: (a) providing a non-photosensitive layer comprising an acid-containing polymer; (b) applying an ink imagewise to the non-photosensitive layer to produce image areas and unimaged areas, said ink comprising an esterification agent which is capable of reacting with the acid groups in the polymer to form water-insoluble ester groups; (c) drying the non-photosensitive layer to induce or accelerate the esterification reaction between the acid groups and the esterification agent in the imaged areas; and (d) washing the non-photosensitive layer with an aqueous developer solution to remove the unimaged areas of the non-photosensitive layer is described.

Abstract: A process for esterifying a polymer containing carboxyl(ate) groups, by maintaining the polymer at 0.degree. C. to 200.degree. C. where the counterion for the carboxylate groups is a selected ammonium or sulfoxonium ions. Such processes are useful for preparing improved films and coatings, particularly automotive coatings.

Abstract: The polymeric pigment dispersants of this invention are polyester/acrylic comb polymers which are the reaction product of 20-85% of a carboxylic functional polyester copolymer, 10-50% of an oxirane substituted acrylic copolymer, and 2 to 20% of an imide compound. These materials disperse a wide variety of pigments and are useful in solvent borne coatings where they can provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.

Abstract: Processes are provided for making polycarbodiimides with high carbodiimide contents from isocyanates, and for selectively making mixed aryl-tertiary carbodiimides from isocyanates. Also provided are carbodiimides containing alpha-methylstyryl groups, and polymers made therefrom. All of these polymers and compounds are useful in coatings, and for other applications.

Abstract: Processes are provided for making polycarbodiimides with high carbodiimide contents from isocyanates, and for selectively making mixed aryl-tertiary carbodiimides from isocyanates. Also provided are carbodiimides containing alpha-methylstyryl groups, and polymers made therefrom. All of these polymers and compounds are useful in coatings, and for other applications.

Abstract: AB and ABA block copolymers of acrylics and acrylic amines are useful as oil additives to diminish sediment and color formation. The copolymers are preferably formed by group transfer polymerization.

Abstract: Acrylic AB block copolymers that are useful as pigment dispersants and which are resistant to yellowing and other color changes, characterized by aromatic substituents bonded to the A segment of the block copolymer.

Abstract: Block copolymers composed of similar monomers, but which exhibit subtantially different polarity, one of the blocks having cationic ammonium, phosphonium, or sulfonium moieties. The block copolymers, which are preferably prepared by group transfer polymerization techniques provide excellent performance as pigment dispersants, without the need for special salt-forming components.