Nitto Boseki Co., Ltd.

Nitto Boseki

Keizo Ogihara

Kiyoshi Shimizu

Ikuo Hayashi

Hajime Serizawa

Tadao Itikawa

Susumu Harada

Koichi Ojima

A functional resin derived from a polyallylamine or polyvinylamine and having unsaturated C.dbd.C bonds such as allyl groups at terminals of side chains has good coating properties and strong adhesiveness to a substrate, thus can be used as protective films for various substrates, coating compositions and adhesives.

Functional polymers derived from polyamines and process for producing

A process for producing a novel photosensitive resin having cinnamic groups, comprising reacting a polyallylamine represented by the general formula (I) ##STR1## (wherein n is at least 10) or an inorganic acid salt thereof with a compound having a cinnamic group in the presence of a solvent. The process is free from drawbacks as experienced in the production of a conventional photosensitive resin (e.g. polyvinyl cinnamate), such as formation of by-products during the polymerization of a monomer (e.g. vinyl cinnamate).

Process for producing novel photosensitive resins

This invention relates to a novel acylation process which comprises using as the acylating agent an o-hydroxy-substituted aromatic oxime ester represented by the general formula (I) ##STR1## and mixing said acylating agent with an amine substance represented by the general formula (III) ##STR2## to form a compound represented by the general formula (IV) ##STR3##

Process for acylation with novel acylating agent

A sequential polyamino acid resin having a remarkably high molecular weight and special amino acid sequence as repeating unit in the resin can be produced by conducting polycondensation of a dipeptide active ester acid salt in an aprotic polar solvent in the presence of a tertiary amine and phosphorus pentoxide.

Growing community of inventors

Sukagawa, Japan

Keizo Ogihara