Rosin-modified product, flux composition, liquid flux, flux cored solder and solder paste

Patent metadata

Field	Value
Publication number	US-2021101232-A1
Application number	US-202017018894-A
Country	US
Kind code	A1
Filing date	Sep 11, 2020
Priority date	Oct 3, 2019
Publication date	Apr 8, 2021
Grant date	—

Abstract

A rosin-modified product
being a reactant of a rosin or a rosin derivative and an alkanolamine represented by a following Formula (1)

NH 3-n —(R—OH) n ( n ≤3); or  (1)
being produced by a reaction of a rosin or a rosin derivative, an organic acid and an alkanolamine.

First claim

What is claimed is:

1 . A rosin-modified product
being a reactant of a rosin or a rosin derivative and an alkanolamine represented by a following Formula (1)
NH 3-n —(R—OH) n ( n≤ 3); or  (1)

being produced by a reaction of a rosin or a rosin derivative, an organic acid and an alkanolamine.

2 . A flux composition comprising the rosin-modified product according to claim 1 .

3 . The flux composition according to claim 2 further comprising
a reactant of two molecules of alkanolamine.

4 . The flux composition according to claim 2 , wherein
a mixing amount of the rosin-modified product is 5% by weight to 65% by weight based on a total amount of a flux.

5 . The flux composition according to claim 2 further comprising
a phosphoric acid ester or a phosphonic acid ester,
wherein a mixing amount of the phosphoric acid ester or the phosphonic acid ester is 1.0% by weight to 15% by weight based on a total amount of a flux.

6 . The flux composition according to claim 2 further comprising
an organic acid,
wherein a mixing amount of the organic acid is more than 0% by weight and 10% or less by weight based on a total amount of a flux.

7 . A liquid flux comprising:
the flux composition according to claim 2 ; and a solvent.

8 . A flux cored solder in which the flux composition according to claim 2 is filled.

9 . A solder paste comprising:
the flux composition according to claim 2 ; a thixotropic agent; a solvent; and solder powders.

10 . A liquid flux having an amount of current, which is measured by using 289Si manufactured by Fluke Corporation under conditions of 25° C. and humidity 50% after following process, being 100 μA or less,
wherein the process includes
50 μl of a flux is applied to a board being a comb type electrode board type 2 (FR-4),
then the flux is dried at 100° C. for 10 minutes,
then 10 μl of ion-exchange water is added dropwise on the flux, and
then a voltage (applied voltage: DC 5 V) is applied to the board for 3 minutes.

11 . The liquid flux according to claim 10 ,
wherein the amount of current is 10 μA or less.

Assignees

• Senju Metal Industry Co

Inventors

• Mizowaki Toshio

Classifications

• B23K35/262

  Sn as the principal constituent · CPC title

• B23K35/3613

  Polymers, e.g. resins · CPC title

• B23K35/362 Primary

  Selection of compositions of fluxes (B23K35/365, B23K35/368 take precedence) · CPC title

• B23K35/025

  Pastes, creams or slurries · CPC title

• B23K35/3615 Primary

  N-compounds · CPC title