Nippon Paint Compnay, Ltd.

Nippon Oil Company

Yasuyuki Tsuchiya

Kenshiro Tobinaga

Hiroyuki Sakamoto

Yutaka Otsuki

Satoshi Urano

Yoshihiko Araki

Hiroyoshi Omika

Akio Oshima

Keizou Ishii

Noriyuki Tsuboniwa

Hirotoshi Umemoto

Shinichi Ishikura

Koichi Saito

Hisaichi Muramoto

Shinsuke Shirakawa

Hiroshi Tsushima

Yusuke Ninomiya

Koji Ito

Koichi Hagihara

Noriyuki Sakamoto

Akio Ichikawa

Kastuyoshi Yamasoe

Shigeo Nishikawa

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

The present invention provides a cationic electrocoating composition which cures at the preferred curing temperature range and provides superior curing properties and cured film properties. The cationic electrocoating composition of the present invention comprises a resinous component and an aqueous medium, wherein the resinous component is composed of one or more polymers and has as a whole an active hydrogen containing group, a cationic group and a substituted group and at least one of the polymers comprises a vinyl polymer which has 5 to 1,000 substituted acylamide groups.

Cationic electrocoating composition

Disclosed is a micro gel particle having an anionic charge for which it is electrodepositable by itself. The present invention provides a process for preparing an anionic micro gel particle dispersion comprising:

Anionic microgel particle dispersion and a coating composition therefrom

The present invention relates to polymerizable cyclic urea derivatives which can be thermally split to give rise to an isocyanate group; and to a polymer having cyclic urea pendant groups, which can be cured by heating without any additional curing agent such as an isocyanate blocked with a volatile lower molecular weight material, so that volatile material is not released in a thermal curing process.

Polymerizable cyclic urea derivatives and polymers having a pendant urea

Disclosed is a novel curing system which is not associated with decomposition or production of low molecular materials. The curing system employs an aqueous composition which comprises (a) a compound having in one molecule at least two carbonylcyclic urea groups represented by the following formula (1) ##STR1## [wherein n is an integer of 0 to 5, X which may be the same or different and represents oxygen atom, a sulfur atom or --NR.sub.1 -- in which R.sub.1 is a hydrogen atom, an alkyl, hydroxyalkyl or alkylene group having 1 to 5 carbon atoms.] and (b) a basic resin which has a functional group reactive with an isocyanate group and is water soluble or water dispersible by neutralizing. The present invention also provides an aqueous composition comprising a basic resin (c) which has a functional group reactive with an isocyanate group and has in one molecule at least two carbonylcyclic urea groups represented by the following formula (1) ##STR2## wherein n and X are the same as mentioned above, and which is water soluble or water dispersible by neutralizing.

Electrodepositable aqueous coating composition with a component having

The present invention provides a micro gel particle having a cationic charge, prepared by a radical polymerization. The micro gel particle is obtained in the form of an aqueous dispersion. The micro gel particle dispersion is prepared by dispersing or emulsifying in an aqueous medium (A) a cationic aqueous resin and (B) a resin having at least two polymerizable vinyl groups and a number average molecular weight of 400 to 20,000, followed by radical-polymerizing.

Aqueous dispersion of cationic crosslinked resin particles from resin

An electrodeposition coating composition containing polymer microparticles of 0.01 to 20 microns size is disclosed. The polymer microparticles have a predetermined range of softening point, solubility parameter, refractive index or crosslinking density.

Electrodeposition coating composition

Disclosed is a multiple electrocoating process comprising coating once or more on a substrate a first electrocoating composition, coating a second electrocoating composition on the uncured first electrocoating composition and then curing all electrodeposited coatings, characterized in that the first electrocoating composition is an aqueous dispersion containing micro gel particles having an electric charge which is specifically prepared; and the second electrocoating composition comprises an anionic or cationic film-forming aqueous resin (C) and a thermosetting crosslinking agent (D) which is self-crosslinked or crosslinked with said aqueous resin (C).

Multiple electrocoating process

Disclosed is a water-borne coating composition having improved pigment dispersibility. The water-borne coating composition comprises a pigment and a water dispersible or water soluble resin, wherein said pigment is preliminary ground with crosslinked resin particles having ionic groups on the surface.

Water-borne coating composition

Disclosed is a micro gel particle having a cationic charge, which is electrodepositable. The micro gel particle is obatined in the form of aqueous dispersion. The micro gel particle dispersion is prepared by a process comprising

Cationic micro gel particle dispersion and a coating composition

A cationic water-dispersible resin having quarternary ammonium groups is produced by reacting an acid-addition salt of a polymeric tertiary amine derived from a partially epoxidized polybutadiene-based polymer with an aliphatic secondary amine. The cationic water-dispersible resin is useful for preparing pigment paste and coating compositions to be used in cathodic electrodeposition coating systems.

Quarternary ammonium group-containing resins for use in cathodic

A water-based paint composition comprising:

Water-based paint composition

A cathode-depositing electrodeposition coating composition having excellent low-temperature curability comprising as essential ingredients (A) 100 parts by weight of a reaction product of (1) a high molecular compound having a molecular weight of 500 to 5,000 and containing carbon-carbon double bonds with an iodine number of 50 to 500 and 3 to 12% by weight of oxirane oxygen, and (2) 30 to 300 millimoles, per 100 g of the high molecular compound (1), of a specified amine compound, (B) 10 to 200 parts by weight of a reaction product of a specified diglycidyl compound with 1.9 to 2.1 moles, per molecule of the diglycidyl compound, of an alpha, beta-unsaturated carboxylic acid or an unsaturated fatty acid having a molecular weight of 100 to 350 and containing at least 10% by weight of a carbon-carbon double bond, or a mixture of both, (C) 0.5 to 10 parts by weight of a reaction product of a high molecular compound having a molecular weight of 500 to 5,000 and containing a carbon-carbon double bond with an iodine number of 50 to 500 and 40 to 400 millimoles, per 100 g of the high molecular compound, of a specified alpha, beta-unsaturated dicarboxylic acid and (D) 0.005 to 1.0 part by weight, as metal, of a water-soluble salt of an organic acid with a metal selected from manganese, cobalt, and copper.

Cathode-depositing electrodeposition coating composition

A cathode-depositing electrodeposition coating composition comprising an aqueous solution or dispersion containing

A cathode-precipitating electrodeposition coating having excellent low-temperature curability, said composition consisting essentially of

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Hirakata, Japan

Yasuyuki Tsuchiya