Takeda Chemical Industries, Inc.

Kohji Nasu

Michio Tanaka

Tetsuaki Kanemoto

Ichiro Minato

Fumihiro Doura

Masanori Okamura

Shoichi Fujita

A thermosetting resin which contains therein:

Thermosetting resins and electrodeposition coating compositions

A polyisocyanate having a biuret structure obtained by allowing .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-xylylene diisocyanate, a diisocyanate represented by the general formula:

Polyisocyanates and resin compositions thereof

A curable resin composition which comprises (1) a copolymer composed of an aminoalkyl acrylate and/or aminoalkyl methacrylate and an ethylenically unsaturated monomer and (2) a blocked polyisocyanate compound formulated therein. The curable resin composition undergoes curing at by far lowered temperatures as compared with the conventionally employed baking paints consisting of hydroxyl-containing resins and blocked polyisocyanate compounds, and are therefore useful, for example, as a low-temperature baking type paint or adhesive. Heating brings about the crosslinking through the reaction between isocyanate and amino groups, thus providing coating films with excellent flexibility, chemical resistance, water resistance, impact resistance, corrosion resistance, etc. The composition can be used to such substrates as metal, heat-resistant plastics and inorganic materials, and can be applied onto electrical appliances for household uses, automobiles, building materials and the like.

Curable resin compositions and their use

A urethane resin composition which comprises (i) a polyisocyanate component having 20/80 to 80/20 of a weight ratio on a solid basis of an .alpha., .alpha., .alpha.', .alpha.'-tetramethyl-xylylene diisocyanate derivative to a hexamethylene diisocyanate derivative and (ii) an acrylic polyol. The urethane resin composition can provide coating films with excellent drying property, mechanical properties, weathering resistance and chemical resistance, and are advantageously used, for example, as a paint for automobile repairing uses.

Urethane resin compositions

A precoat metal, which has been prepared by coating a metal plate with a composition comprising (i) at least one member selected from the group consisting of (a) bis(isocyanatomethyl)cyclohexane and/or its adduct blocked with a blocking agent and (b) an isocyanate blocked with ethyleneimine and (ii) a polyol resin, and heating the thus coated metal plate to cure the coating material. Such film, when applied as a coating to a metal plate is completely free from yellowing and thermal degradation, and also exhibits increased hardness as well as a high flexural strength, staining resistance and chemical resistance. The precoat metal is advantageously utilized in construction materials, for example, roof decking and wall panels; and materials for light electrical appliances such as refrigerators and radios and TV, vending machine cabinets etc.

Precoat metal and its production

A method of protecting cementware from frost-damage, which comprises coating the cementware with a moisture-cure type urethane resin coating impregnated with a web-like or three-dimensionally structured organopolysiloxane compound represented by the rational formula:

Composition for protecting cementware from frost-damage comprising

A method of protecting cementware from frost-damage, which comprises coating the cementware with a moisturecure type urethane resin coating impregnated with a weblike or three-dimensionally structured organopolysiloxane compound represented by the rational formula:

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Nishinomiya, Japan

Kohji Nasu