Flux and solder paste

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United States of America Patent

PATENT NO 11986910
APP PUB NO 20230321768A1
SERIAL NO

18036963

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Abstract

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The present invention employs a flux which contains rosin, a solvent, a thixotropic agent and an activator. The thixotropic agent contains a polyamide (PA2). The PA2 is a condensation product of an aliphatic carboxylic acid, a hydroxy group-containing aliphatic carboxylic acid and an aliphatic amine having from 3 to 10 carbon atoms; and the aliphatic carboxylic acid includes an aliphatic dicarboxylic acid having from 11 to 20 carbon atoms. With respect to the endothermic amount calculated from the peak area of the differential scanning calorimetry curve of PA2 as obtained by differential scanning calorimetry measurement, the ratio of the endothermic amount within the range of from 50° C. to 190° C. to the total endothermic amount within the range of from 50° C. to 200° C. is 90% or more.

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Patent Owner(s)

  • SENJU METAL INDUSTRY CO. LTD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inoue, Kenta Tokyo, JP 18 29
Miyagi, Nanako Tokyo, JP 4 5
Nagai, Tomoko Tokyo, JP 4 2
Takagi, Kazuyori Tokyo, JP 6 12
Takaki, Akiko Tokyo, JP 4 2

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