Sumitomo Chemical Company, Limited

Toshiyuki Hasegawa

Akira Kawamura

Akira Tanikawa

Yoshifumi Yoshida

Shigeki Naitoh

Fujiko Kumei

Yujiro Kawaguchi

Yutaka Shibata

Hisao Takagishi

Haruo Tanaka

Hiroshi Horiuchi

Akira Tanigawa

Toshishige Hamaguchi

Sonoe Sato

A photosemiconductor encapsulating resin composition, excellent in light transmittance, ultraviolet resistance and heat resistance, comprising the following component (A) and component (B): wherein Rto Rrepresent each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, Rand Rmay be bonded to form an alkylene group having 1 to 8 carbon atoms; Rrepresents an alkylene group; a methylene group contained the alkylene group and the alkyl group represented by Rto Rmay be substituted by an ether group and/or carbonyl group; Yand Yrepresent each independently an oxygen atom, or sulfur atom, is provided.

Encapsulant of epoxy group-containing (meth)acrylic polymer, anhydride and (meth)acrylic monomer

Photosemiconductor encapsulant of epoxy group-containing (meth) acrylic polymer and alicyclic anhydride

A resin composition for paper-coating, which comprises (A) a cross-linked amine compound which is a reaction product of (a) an aliphatic amine, (b) a glycidyl compound having at least two glycidyl groups in the molecule and (c) a compound selected from &agr;,&bgr;-unsaturated carbonyl compounds, &agr;,&bgr;-unsaturated nitrile compounds and &agr;-halocarboxylic acid groups; and (B) at least one selected from a group consisting of (B1) non-polymer nonvolatile substances and (B2) polyhydric alcohols, is provided, and the resin composition for paper-coating can realize high quality of coated paper by being mixed with a pigment and an aqueous binder and being coated on paper, which does not cause generation of formaldehyde and which does not tend to produce disadvantages such as thickening and deterioration in flowing property, and for paper using the resin composition and a coated paper produced by using the coating composition are also provided.

Resin composition for paper-coating, coating composition for paper and coated paper

A paper coating composition which comprises:

Paper coating composition

A water soluble resin obtainable by reacting at least two reactants comprising a polyamine and a urea compound, or at least four reactants comprising a polyamine, a urea compound, a dibasic carboxylic acid compound and a lactam; and then reacting the reaction product with at least one compound selected from among epihalohydrins, .alpha.,.gamma.-dihalo-.beta.-hydrins, glycidyl compounds and isocyanates. The resultant the water soluble resin is useful for making a paper coating composition, such as by being mixing that resin with a pigment and an aqueous binder. The paper coating composition does not generate formaldehyde and can be used to manufacture coated papers exhibiting improved properties including excellent water resistance.

Water soluble resins and application thereof to paper coating

A paper coating composition comprising (I) a pigment, (II) an aqueous binder, and (III) a water-soluble resin obtainable by the reaction of at least (a) an alkylenediamine or a polyalkylenepolyamine, (b) an urea compound, and (c) a compound selected from aldehydes, epihalohydrins and is further improved by incorporating therein, (IV) a compound selected from the group consisting of (f) amines selected from the group consisting of monoamines, diamines and their salts each having at least 4 carbon atoms, (g) quaternary organic ammonium salts, and (h) polyamides obtainable by the reaction between a dibasic carboxylic compound and a polyamine. The water-soluble resin of the component (III) may be further allowed to react with a dibasic carboxylic compound, an alicyclic amine and/or an alicyclic epoxy compound in addition to the above three ingredients. Paper coated by using the above composition is especially excellent in ink receptivity and water resistance.

An aqueous solution of a cationic thermosetting resin containing a very small amount of organic halogen compounds is prepared by adjusting a reaction temperature in a reaction of polyamidopolyamine with epihalohydrin and a molar ratio of the polyamidopolyamine and epihalohydrin.

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Nara, Japan

Toshiyuki Hasegawa