Nippon Paint Compnay, Ltd.

Yusuke Ninomiya

Shinichi Ishikura

Keizou Ishii

Hisaichi Muramoto

Hiroyuki Sakamoto

Yasuyuki Tsuchiya

Kenshiro Tobinaga

Tomohito Asai

Shinya Yamada

Method of preparing an acrylic copolymer having an acid anhydride group

Disclosed is a process for preparing crosslinked resin particles which comprises dispersing a resin having both a water-dispersible function and a self-crosslinkable function in one molecule in an aqueous medium and then three-dimensionally crosslinking.

Crosslinked resin particles and production thereof

Disclosed is a photosensitive resin composition which has improved water developability and storage stability. The composition comprises

Photosensitive resin composition

Disclosed is an improved process of the post-emulsion method capable of forming crosslinked resin particles which do not have fusion bonds between particles and which have good storage stability and good redispersibility in an aqueous medium. The process comprises (a) dispersing in an aqueous medium a resinous component comprising (I) a base resin having a glass transition temperature (Tg) of 0.degree. C. or less and a polymerizable double bond, (II) a monomer which, when polymerized, provides a resin of which Tg is 20.degree. C. higher than that of said base resin, or a resin of which Tg is 20.degree. C. higher than that of the base resin, and (III) a polyvinyl compound; (b) crosslinking inside the dispersed resin particles and; (c) removing the aqueous medium therefrom.

Process for preparing crosslinked resin particles

The invention concerns a process for preparing composite resin particles having the so-called semi-IPN (inter penetration network) structure, in which linear thermoplastic polymer chains get entangled with a crosslinked polymer core through partial or thorough penetration. This method is very important in that both of the chain polymer and core polymer are freely selected from various resins.

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Nishinomiya, Japan

Yusuke Ninomiya