Resin composition for soldering use, solder composition, flux cored solder, flux, and solder paste

Patent metadata

Field	Value
Publication number	US-2022127445-A1
Application number	US-202017429724-A
Country	US
Kind code	A1
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Apr 28, 2022
Grant date	—

Abstract

Provided are: a resin composition for soldering use, which has excellent compatibility with a rosin-based resin and excellent temperature cycle reliability and is therefore suitable for a flux for soldering use; and a soldering composition and a flux cored solder, in each of which the resin composition for soldering use is used. The resin composition for soldering use comprises: an acrylic resin having a number average molecular weight of 500 or more and less than 2000 as determined by mass spectrometry using a time-of-flight mass spectrometer; and a rosin-based resin, a polyethylene-based resin or a polypropylene-based resin. Alternatively, the resin composition for soldering use comprises: an acrylic resin having a weight average molecular weight of 500 or more and less than 2000 as determined by mass spectrometry using a time-of-flight mass spectrometer; and a rosin-based resin, a polyethylene-based resin or a polypropylene-based resin.

First claim

1 . A soldering resin composition comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a number average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; and a rosin-based resin, wherein an amount of the acrylic resin is 14% by weight to 60% by weight.

2 . A soldering resin composition comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a weight average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; and a rosin-based resin, wherein an amount of the acrylic resin is 14% by weight to 60% by weight.

3 . The soldering resin composition according to claim 1 ,
wherein a ratio of a weight of one kind of the acrylic resin or a total weight of two or more kinds of the acrylic resins to a weight of one kind of the rosin-based resin or a total weight of two or more kinds of the rosin-based resins is 0.2 to 2.0.

4 . The soldering resin composition according to claim 1 ,
wherein an amount of the rosin-based resin is 30% by weight to 80% by weight.

5 . The soldering resin composition according to claim 1 , further comprising:
other resins.

6 . The soldering resin composition according to claim 5 ,
wherein an amount of the other resins is less than or equal to 35% by weight.

7 . The soldering resin composition according to claim 1 , further comprising:
at least one selected from the group consisting of organic acids, amines, organic halogen compounds, amine hydrohalides, organic phosphorus compounds, silicones, and solvents.

8 . The soldering resin composition according to claim 7 ,
wherein an amount of the organic acids is 0% by weight to 20% by weight, an amount of the amines is 0% by weight to 10% by weight, an amount of the organic halogen compounds is 0% by weight to 15% by weight, an amount of the amine hydrohalides is 0% by weight to 5% by weight, an amount of the organic phosphorus compounds is 0% by weight to 10% by weight, an amount of the silicones is 0% by weight to 5% by weight, and an amount of the solvents is 0% by weight to 13% by weight.

9 . A solder composition comprising:
a soldering resin composition of claim 1 .

10 . A flux cored solder obtained by filling a linear solder with a soldering resin composition of claim 1 .

11 . A solder composition obtained by coating a solder with a soldering resin composition of claim 1 .

12 . A flux comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a number average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; a rosin-based resin; an activator; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight and an amount of the rosin-based resin is greater than 0% by weight and less than or equal to 30.0% by weight, and a ratio of a weight of one kind of the acrylic resin or a total weight of two or more kinds of the acrylic resins to a weight of one kind of the rosin-based resin or a total weight of two or more kinds of the rosin-based resins is greater than or equal to 0.7.

13 . A flux comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a weight average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; a rosin-based resin; an activator; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight and an amount of the rosin-based resin is greater than 0% by weight and less than or equal to 30.0% by weight, and a ratio of a weight of one kind of the acrylic resin or a total weight of two or more kinds of the acrylic resins to a weight of one kind of the rosin-based resin or a total weight of two or more kinds of the rosin-based resins is greater than or equal to 0.7.

14 . A flux comprising:
an acrylic resin consisting of either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a number average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; an activator; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight and an amount of the rosin-based resin is 0% by weight to 30.0% by weight.

15 . A flux comprising:
an acrylic resin consisting of either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a weight average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; an activator; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight and an amount of the rosin-based resin is 0% by weight to 30.0% by weight.

16 . The flux according to claim 14 ,
wherein, in a case where the flux comprises the rosin-based resin, a ratio of a weight of one kind of the acrylic resin or a total weight of two or more kinds of the acrylic resins to a weight of one kind of the rosin-based resin or a total weight of two or more kinds of the rosin-based resins is greater than or equal to 0.7.

17 . The flux according to claim 12 , further comprising:
0% by weight to 10.0% by weight of other resins.

18 . The flux according to claim 12 , wherein the activator comprises at least one selected from the group consisting of organic acids, amines, organic halogen compounds, and amine hydrohalides.

19 . A flux comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a number average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; either a polyethylene-based resin or a polypropylene-based resin or both a polyethylene-based resin and a polypropylene-based resin; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight.

20 . A flux comprising:
an acrylic resin comprising either an acrylic acid ester or a methacrylic acid ester or both an acrylic acid ester and a methacrylic acid ester and has a weight average molecular weight of greater than or equal to 500 and less than 2,000 obtained through mass spectrometry using a time-of-flight mass spectrometer; either a polyethylene-based resin or a polypropylene-based resin or both a polyethylene-based resin and a polypropylene-based resin; and a solvent, wherein an amount of the acrylic resin is 7.0% by weight to 50.0% by weight.

21 . The flux according to claim 19 ,
a ratio of a weight of one kind of the acrylic resin or a total weight of two or more kinds of the acrylic resins to a weight of one kind of the polyethylene-based resin or the polypropylene-based re

Assignees

• Senju Metal Industry Co

Inventors

• Kawasaki Hiroyoshi
• Shiratori Masato
• Kurasawa Yoko
• ONITSUKA Motohiro
• Kitazawa Kazuya
• TAKAKI Akiko

Classifications

• C08L23/06

  Polyethylene · CPC title

• B23K35/262

  Sn as the principal constituent · CPC title

• B23K35/3613 Primary

  Polymers, e.g. resins · CPC title

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• B23K35/362

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