Dainippon Ink and Chemicals, Incorporated

Dai Nippon Printing Co., Ltd.

Hidenobu Ishikawa

Osamu Maruyama

Eiju Ichinose

Yohzoh Yamashina

Yoichi Abe

Hiroshi Kojima

Katsuji Takahashi

Noboru Okoshi

Hisatomo Yonehara

Toshikazu Nishio

Yoshinobu Sakurai

Hiroyuki Amemiya

Michiko Takeuchi

Shunji Arimoto

Hisanori Ishida

Fumio Yoshino

Masashi Kinoshita

Shigeru Sakakibara

Atsushi Miyakawa

Yozo Yamashina

Kazuko Etou

Eiji Ichinose

Youichi Abe

Masuyuki Sunada

Hirotugu Takanashi

Akikazu Takahashi

Nobuo Takahashi

A thermosetting polyimide resin composition is provided which comprises a polyimide resin and an epoxy resin, which has excellent heat resistance, low dielectric constant and low dielectric loss tangent and also yields a cured article having good mechanical properties such as tensile strength and tensile elongation. Also, a process for producing a polyimide resin used in the polyimide resin composition is provided. The thermosetting polyimide resin composition comprises a polyimide resin (X), which has a carboxyl group and a linear hydrocarbon structure having a number-average molecular weight of 300 to 6,000, and an epoxy resin (Y). The polyimide resin is obtained by reacting a prepolymer (A) having an isocyanate group at the end, which is obtained by reacting a polyisocyanate compound (a1) with a polyol compound (a2) having a linear hydrocarbon structure in which a number-average molecular weight of a linear hydrocarbon structure is from 300 to 6,000, with an anhydride (B) of polycarboxylic acid having three or more carboxyl groups in an organic solvent.

Thermosetting polyimide resin composition process for producing polyimide resin, and polyimide resin

Disclosed is an active energy ray-curable polyimide resin composition which comprises a polymerizable polyimide resin (I) having an isocyanurate ring, an alicyclic structure, an imide ring and a (meth)acryloyl group and being capable of patterning with a dilute alkali aqueous solution.

Active energy ray-curable polyimide resin composition

Active energy ray curable composition comprised of a maleimide derivative and a method for curing the said curable composition

The present invention provides a radiation curable resin composition and method of production therefor; the present composition has wide applications as an ink, coating or the like, is dilutable in water or an organic solvent, and forms a coating which has excellent hardening characteristics and adherence to a substrate, as well as superior resistance to heat, chemicals and boiling, this resin composition may be redissolved with water or an organic solvent prior to hardening; which have a number average weight of 500 to 50,000, characterized in that the aprotic ammonium salt represented by general formula 1 is contained in the resin in the amount of 0.1 to 4.0 mol/kg. ##STR1## (In the formula, X is an organic group which is bound to the main chain and includes a hydrocarbon of 0 to 3 carbon atoms, an ester and an amide; R1 and R2, which may be the same or different, represent a hydrocarbon of 1 to 8 carbons which may be substituted with a hydroxyl group, ester group, alkoxy group or halogen atom, wherein R1 and R2 may bond together, with bonding occurring between the nitrogen atoms of R1 and R2 to form a heterocyclic ring; R3 indicates a hydrogen atom or a hydrocarbon of 1 to 18 carbon atoms that has one or more polymerizable unsaturated double bonds and may be substituted with a hydroxyl group, ester group, alkoxy group, or halogen atom; and R4, R5 and R6, which may be the same or different, represent a hydrogen atom or a hydrocarbon of 1 to 18 carbons which may be substituted with a hydroxyl group, ester group, alkoxy group, or halogen atom, wherein R5 and R6 may bond together to form a heterocyclic ring.)

Radiation curable resin composition and method therefor

An ionizing radiation-curable resin composition which provides a cured product having no yield point in the stress-strain diagram in tension is disclosed. An optical article prepared from the ionizing radiation-curable resin composition and a surface light source using the optical article are also disclosed. The present invention provides an excellent ionizing radiation-curable resin composition, an excellent optical article comprising a cured product of the resin composition, and an excellent surface light source using the optical article, which have high surface hardness and a high refractive index and are free from deformation, permanent sets, and reduction in weather resistance after curing.

Ionizing radiation-curable resin composition for optical article,

A radiation-curing resin composition comprising (A) a resin having a carboxylic acid group and an unsaturated double bond and (B) a compound containing a cyclocarbonate group. The composition is excellent in stability and curing properties and provides a cured film excellent in water resistance, solvent resistance, chemical resistance, and heat resistance.

Radiation-curing resin composition

Polyurethane polyurea particles are obtained by an interfacial polymerization reaction between a hydrophobic phase which is capable of forming a three-dimensional crosslinked structure by reaction and is a mixture comprising a polyisocyanate compound and a polyhydroxy compound with the isocyanate groups being stoichiometrically excessive, and a polyamine in an amount not more than one equivalent of the stoichiometrically excessive isocyanate groups in the hydrophobic phase, and by polyurethanization reaction inside the particles.

Polyurethane polyurea particles and process for production thereof

A curable resin composition comprising an isocyanuric ring-containing urethane-modified radical-polymerizable compound. The composition can give a protective coating having excellent surface mar resistance and improved secondary adhesion.

Curable resin composition and its use

An activation energy-curable resin composition comprising as an essential ingredient a resin obtained by reacting (a) the reaction product of a novolac epoxy compound and an unsaturated monocarboxylic acid with (b) the reaction product of a diisocyanate and a poly(meth)acrylate having one hydroxyl group for each molecule.

Activation energy-curable resin composition

A composition for water-base paints, said composition comprising (I) a water-soluble resin, and (II) a water-dispersible polymer containing at least one group selected from the class consisting of hydroxyl and carboxyl groups, said water-soluble resin being obtained by polymerizing 50 to 99.5% by weight of an alkyl ester of an .alpha.,.beta.-monoethylenically unsaturated acid or an alkenyl benzene, 0.5 to 20% by weight of an .alpha.,.beta.-monoethylenically unsaturated acid and 0 to 30% by weight of a hydroxyalkyl ester of an .alpha.,.beta.-monoethylenically unsaturated acid in the presence of at least one unsaturated compound selected from the group consisting of alkyd resins containing a polymerizable unsaturated group, epoxy esters containing a polymerizable unsaturated group, drying oils, fatty acids of drying oils and diene polymers, and water-solubilizing the product with ammonia or an amine.

Composition for water-base paint comprising water-soluble resin and

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Ichihara, Japan

Hidenobu Ishikawa