Nippon Shokubai Co., Ltd.

Nippon Shokubai Kagaku Kogyo Co., Ltd.

Yasumasa Tanaka

Naoki Tsunemine

Yoshinori Sano

Hideyuki Tahara

Koichi Yamamoto

Masatoshi Yoshida

Kenji Minami

Masuji Izubayashi

Hideyuki Nishibayashi

Hiroyuki Ishida

Kazutomo Takahashi

Osamu Konosu

Masaya Uchida

Akikazu Banba

Kouichi Tsuchitani

Shigehiro Nishimura

Masatoshi Kurahashi

Yugi Sugiura

The present invention provides an emulsion for pressure-sensitive adhesive, and a pressure-sensitive adhesive product which exhibits high water resistance and high adhesion properties. The emulsion for pressure-sensitive adhesive includes as essential components: a pressure-sensitive adhesive polymer (A) having a glass-transition temperature of &minus;80 to &minus;20&deg; C., a weight-average molecular weight of 150,000 or larger, and a carboxylic acid value of 30 or smaller; a rosin derivative (B) having a weight-average molecular weight of 100,000 or smaller, and containing at least part of the carboxyl groups being alkali salt with a carboxylic acid value of 190 or larger before alkalization; and a compound (C) having a weight-average molecular weight of 100,000 or smaller, and having no carboxyl group but having at least one functional group reactive with a carboxyl group in its molecule. The amount of the rosin derivative (B) is 2 to 30 mass percent when the total amount of the pressure-sensitive adhesive polymer (A) and the rosin derivative (B) in the emulsion is defined as 100 mass percent, and the compound (C) is contained in the emulsion so that the functional group of the compound (C) is in an amount of 0.05 to 10 equivalent with respect to one equivalent of the carboxyl groups of the rosin derivative (B) before alkalization.

Emulsion for pressure-sensitive adhesive

Water-dispersion type pressure-sensitive adhesive composition, method of

The present invention provides an acrylic polymer containing no surfactant, having little limitation in the polymer composition and being superior in heat resistance, processing operation performance and fluidity, and also provides use of the polymer and a production process. An acrylic polymer of present invention is obtained by the bulk polymerization, contains an acrylic acid-based monomer unit as a main component in its structure and has a Mn of 1,000 to 1,000,000, a glass transition temperature of -80.degree. C. or higher and a Mw/Mn ratio of 5 or less, and is appropriate for acrylic rubber, a pressure-sensitive adhesive, an alkali-soluble adhesive, an alkali-soluble film, an alkali-soluble injection molding or water ink. This polymer is produced by, in the presence of an inactive gas, carrying out the bulk polymerization of a starting material which contains a monomer component having an acrylic acid-based monomer as a main component and contains a sulfur compound of 0.001 to 20 parts by weight based on 100 parts by weight of the monomer component, and contains a polymerization initiator in the weight of one-third or less based on the sulfur compound.

Acrylic polymer, its use and process for producing it

An additive for paper production, comprising an amphoteric polymeric electrolyte having as an essential component thereof a structural unit represented by the following general formula I: ##STR1## wherein n is an integer in the range of 1 to 5, R.sup.1, R.sup.2, and R.sup.3 are independently hydrogen atom or an alkyl group, R.sup.4 is hydrogen atom, an alkyl group, or a hydroxyalkyl group, and a and b are jointly relative numerals such that the a/b ratio is in the range of 0.2 to 45.0), having at least part of the amino group of said amphoteric polymeric electrolyte neutralized, and possessing a cation equivalent amount (Cv) in the range of 1.0 to 15.0 meq/g, an anion equivalent amount (Av) in the range of 0.1 to 7.0 meq/g, and a Cv/Av ratio in the range of 0.2 to 45.0.

Additive for production of paper

A process for preparing 2-aminoethyl esters of methacrylic acid by the reaction of methacrylic acid with an aziridine compound in a reaction solvent consisting of water or an aqueous solvent.

Process for preparing 2-aminoethyl esters of methacrylic acid

Methods are disclosed for the production of (I) a cationic water-soluble resin by the reaction of a polyethylene glycol polyhalohydrin ether resulting from the reaction between polyethylene glycol and an epihalohydrin with an aziridine compound and (II) and (III) cationic water-soluble resins by the reaction of (I) the resin with an epihalohydrin and/or a polyfunctional epoxy compound in the presence or absence of a polyalkyleneimine. The resins (I), (II), and (III) are stable over a wide range of pH value and are useful as a water-treating agent.

Method for production of cationic water-soluble resin and water-treating

Growing community of inventors

Osaka, Japan

Yasumasa Tanaka