Sumitomo Chemical Company, Limited

Shigeru Ura

Hisao Takagishi

Haruo Tanaka

Shigenao Kawakami

Mikio Iwata

Naoyoshi Jinno

Terumasa Saka

Yoshiya Fukuyama, Deceased

Norio Kondo

Yoshiya Fukuyama

Yoshiharu Tokugawa

Makoto Nakahara

Hiroko Fukuyama

Wataru Tohoma

Shin-Ichi Isaoka

Takuya Fukuyama

Hiroko Fukuyama, Heir

Yuko Fukuyama

Hiroyuki Shiono

Takuya Fukuyama, Heir

Yuko Fukuyama, Heir

A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.

Paper coating composition

Process for producing resin for paper coating

A paper coating composition is disclosed, which comprises:

A paper coating composition is described, containing a pigment and an aqueous binder as major components, and further containing a mixture of a reaction product between (a) at least one alkylenediamine or polyalkylenepolyamine and (b) epihalohydrin, and (Y) a water-soluble resin obtained by reacting urea, polyalkylenepolyamine, and dibasic carboxylic acid and reacting the resulting polyamidopolyurea with formaldehyde, or containing these reaction products.

Coating composition for providing water and blister resistant,

A paper coating composition is described, containing a pigment and an aqueous binder as major components, and further containing a thermosetting resin in aqueous solution, obtained by reacting or mixing (Y) a water-soluble resin obtained by reacting urea, polyalkylenepolyamine, and dibasic carboxylic acid and reacting the resulting polyamidopolyurea with formaldehyde, (a) at least one alkylenediamine or polyalkylenepolyamine, and (b) epihalohydrin, or the reaction product between (Y) and (b) with (a).

Coating compositions for providing water and blister resistance to

An amphoteric polyelectrolyte which is useful as a paper additive capable of imparting dry strength to paper, a high molecular flocculant, a high molecular dehydrating agent or the like is prepared by copolymerizing a cationic vinyl monomer such as .beta.-methacryloxyethyl trimethylammonium chloride, an anionic vinyl monomer such as acrylic acid and a vinyl monomer such as acrylamide, optionally with a nonionic vinyl monomer such as acrylonitrile, in a solvent in the presence of a catalyst.

Amphoteric polyelectrolyte

A transparentizing composition for paper comprising a compound having the formula: ##STR1## or salts thereof and a solvent.

Transparentizing agent for paper

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Nara, Japan

Shigeru Ura