Arakawa Chemical Industries Ltd.

Tsurumi ku, Japan

Arakawa Chemical Industries Ltd.

Tsurumi ku, Japan
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Patent
Arakawa Chemical Industries Ltd. | Date: 2013-08-20

The polymerized rosin compound of the invention includes a rosin dimer component (A) including a bifunctional rosin dimer component (a1) represented by formula (1): ROOCXCOOR, wherein X represents a rosin dimer residue, and R represents hydrogen, an alkyl group of 1 to 5 carbon atoms, or a benzyl group, wherein the rosin dimer component (A) contains a content of the bifunctional rosin dimer component (a1) of 80% by weight or more and the polymerized rosin compound contains a content of the rosin dimer component (A) of 80% by weight or more. The polymerized rosin compound contains a large amount of the bifunctional rosin dimer component and makes it possible to obtain linear polymer with a high molecular weight.


Patent
Arakawa Chemical Industries Ltd. | Date: 2017-01-18

An object of the present invention is to provide an adhesive composition that is substantially odorless and has an extremely good color and excellent adhesive properties or tack at low temperatures of about 5C and in which deterioration over time caused by heat or light is suppressed. The present invention relates to an adhesive composition comprising a liquid rosin ester compound, the liquid rosin ester compound being obtained by reacting a rosin compound with a C_(1-10) monohydric alcohol compound and having a Gardner color of 1 or less, a glass transition temperature of -20C or less, a degree of esterification of 93 wt% or more, and a ratio (Y/Y) of the total area of peaks in 16- to 22-min retention time region (Y) to the total area of all the peaks (Y) measured by gas chromatography under the following conditions of 200 ppm or less.


Patent
Pomiran Metalization Research Co., Taimide Technology Incorporation and Arakawa Chemical Industries Ltd. | Date: 2016-04-08

The present disclosure relates, according to some embodiments, to a method of fabricating a flexible metal-clad laminate comprising forming a metal layer on a surface of a polyimide film, wherein the metal layer and the polyimide film are contacting each other and forming a laminate, and heating the laminate at a temperature of about 80 C. to about 140 C. until a weight loss of the laminate reaches about 1% or higher.


Patent
Arakawa Chemical Industries Ltd. | Date: 2015-07-01

The polymerized rosin compound of the invention includes a rosin dimer component (A) including a bifunctional rosin dimer component (a1) represented by formula (1): ROOC-X-COOR, wherein X represents a rosin dimer residue, and R represents hydrogen, an alkyl group of 1 to 5 carbon atoms, or a benzyl group, wherein the rosin dimer component (A) contains a content of the bifunctional rosin dimer component (a1) of 80% by weight or more and the polymerized rosin compound contains a content of the rosin dimer component (A) of 80% by weight or more. The polymerized rosin compound contains a large amount of the bifunctional rosin dimer component and makes it possible to obtain linear polymer with a high molecular weight.


The present invention provides a method for manufacturing light-colored purified tall oil rosin comprising a distillation process of distilling unpurified tall oil rosin in a presence of activated carbon. The present invention further provides a method for manufacturing a tall oil rosin ester comprising a rosin production process of producing light-colored purified tall oil rosin by this method for manufacturing, an esterification process of carrying out an esterification reaction of the purified tall oil rosin obtained in the rosin production process and alcohols, and an antioxidant-addition-process of adding at least one antioxidant selected from the group consisting of a sulfur-based organic compound, a thiophosphite-based organic compound and a phosphorus-based antioxidant during or after the esterification process.


Patent
Arakawa Chemical Industries Ltd. and Pelnox Co. | Date: 2015-01-07

The present invention provides a heat dissipating coating composition in a liquid or paste form for application to a heat generating article, comprising an infrared absorbing binder resin (A), infrared absorbing inorganic particles (B), and an organic solvent, having such proportions of the component (A) and the component (B) that the component (A) is 10 to 70 vol% and the component (B) is 90 to 30 vol% based on the total of both components being 100 vol%, and satisfying conditions 1, 2, and 3 specified herein, and also provides a heat dissipating coating film obtained by applying the heat dissipating coating composition to a heat dissipating article and then thermally curing the composition.


Patent
Arakawa Chemical Industries Ltd. | Date: 2015-03-25

The object of the present invention is to provide a soldering-flux-oriented novel base resin that enhances the fluidity of a soldering flux and both the visco-stability and adhesion of a solder paste, while improving the color tone and anti-crack property of the flux residue. The present invention is directed to a base resin for a soldering flux, the base resin comprising a rosin (A) containing at least 15 wt% of a pimarane-type resin acid (a-1), at least 1 wt% of a labdane-type resin acid (a-2), and at least 50 wt% of an abietane-type resin acid that has no conjugated double bond (a-3).


Patent
Arakawa Chemical Industries Ltd. | Date: 2015-03-11

An object of the present invention is to provide an adhesive composition that is substantially odorless and has an extremely good color and excellent adhesive properties or tack at low temperatures of about 5 C. and in which deterioration over time caused by heat or light is suppressed. The present invention relates to an adhesive composition comprising a liquid rosin ester compound, the liquid rosin ester compound being obtained by reacting a rosin compound with a C_(1-10 )monohydric alcohol compound and having a Gardner color of 1 or less, a glass transition temperature of 20 C. or less, a degree of esterification of 93 wt % or more, and a ratio (Y/Y) of the total area of peaks in 16- to 22-min retention time region (Y) to the total area of all the peaks (Y) measured by gas chromatography under the following conditions of 200 ppm or less.


Patent
Arakawa Chemical Industries Ltd. | Date: 2015-01-14

The present invention provides a hot melt adhesive composition comprising (A) an ethylene copolymer obtained by copolymerizing ethylene and -olefin using a single-site catalyst and (B) a rosin ester, in a hydrolyzate of which a dehydroabietic acid content is 30 wt% or less and an abietic acid content is 10 wt% or less, and in a methylated product of the hydrolyzate of which a content of components having a molecular weight of 320 is equal to or greater than 10 wt% of a total amount of components having a molecular weight of 314 to 320.


A method for manufacturing light-colored purified tall oil rosin includes a distillation process of distilling unpurified tall oil rosin in a presence of activated carbon. A method for manufacturing a tall oil rosin ester includes a rosin production process of producing light-colored purified tall oil rosin by this method for manufacturing, an esterification process of carrying out an esterification reaction of the purified tall oil rosin obtained in the rosin production process and alcohols, and an antioxidant-addition-process of adding at least one antioxidant selected from a sulfur-based organic compound, a thiophosphite-based organic compound and a phosphorus-based antioxidant during or after the esterification process.

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