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

Patent metadata

Field	Value
Publication number	US-11794288-B2
Application number	US-202017018894-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Oct 3, 2019
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

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 flux composition comprising:
a rosin-modified product being a reaction product of a rosin or a rosin derivative and an alkanolamine represented by a following Formula (1)
NH 3-n —(R—OH) n ( n≤ 3);  (1)

a phosphoric acid ester or a phosphonic acid ester; and
a sebacic acid,
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 the flux composition,
wherein a mixing amount of the sebacic acid is more than 0% by weight and 2% or less by weight based on a total amount of the flux; and
wherein the flux composition has an effect to suppress an occurrence of migration.

2. The flux composition according to claim 1 further comprising a reaction product of two alkanolamines.

3. The flux composition according to claim 1 , wherein a mixing amount of the rosin-modified product is 5% by weight to 65% by weight based on a total amount of the flux composition.

4. A liquid flux comprising:
the flux composition according to claim 1 ; and
a solvent.

5. A flux cored solder in which the flux composition according to claim 1 is filled.

6. A solder paste comprising:
the flux composition according to claim 1 ;
a thixotropic agent;
a solvent; and
solder powders.

7. The flux composition of claim 1 , wherein the rosin-modified product is produced by a reaction of the rosin or the rosin derivative, the alkanolamine and an organic acid , wherein the organic acid comprises succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, sebacic acid, azelaic acid, dimer acid, propionic acid, 2,2-bishydroxymethyl propionic acid, tartaric acid, malic acid, glycolic acid, diglycolic acid, thioglycolic acid, dithioglycolic acid, stearic acid, 12-hydroxystearic acid, palmitic acid, or oleic acid.

8. The flux composition of claim 7 , wherein contents of rosin or the rosin derivative, the organic acid, and the alkanolamine for the reaction are 40% to 80% by weight, 1% to 15% by weight, and 1% to 30% by weight, respectively.

Assignees

• Senju Metal Industry Co

Inventors

• Mizowaki Toshio

Classifications

• B23K35/362 Primary

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

• B23K35/025

  Pastes, creams or slurries · CPC title

• C09F1/04

  Chemical modification, e.g. esterification (resin soaps C11D) · CPC title

• B23K35/3615 Primary

  N-compounds · CPC title

• B23K35/3613

  Polymers, e.g. resins · CPC title