US9873806B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9873806-B2 |
| Application number | US-201414495471-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 24, 2014 |
| Priority date | Sep 30, 2013 |
| Publication date | Jan 23, 2018 |
| Grant date | Jan 23, 2018 |
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Provided are an ink composition for an aqueous ink ball point pen, which contains modified polyvinyl alcohol and at least one selected from boric acid and salts thereof, and an aqueous ink ball point pen charged with the ink composition, wherein the boric acid and the salts thereof are preferably at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid.
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What is claimed is: 1. An ink composition for an aqueous ink ball point pen, wherein the ink composition comprises modified polyvinyl alcohol and at least one selected from boric acid and salts thereof. 2. The ink composition for an aqueous ink ball point pen as described in claim 1 , wherein a content of the modified polyvinyl alcohol is 0.1 to 8% by mass based on the total amount of the ink composition for an aqueous ink ball point pen. 3. The ink composition for an aqueous ink ball point pen as described in claim 1 , wherein a content of at least one selected from the boric acid and the salts thereof is 0.01 to 3% by mass based on the total amount of the ink composition for an aqueous ink ball point pen. 4. The ink composition for an aqueous ink ball point pen as described in claim 2 , wherein a content of at least one selected from the boric acid and the salts thereof is 0.01 to 3% by mass based on the total amount of the ink composition for an aqueous ink ball point pen. 5. The ink composition for an aqueous ink ball point pen as described in claim 1 , wherein the boric acid and the salts thereof are at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid. 6. The ink composition for an aqueous ink ball point pen as described in claim 2 , wherein the boric acid and the salts thereof are at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid. 7. The ink composition for an aqueous ink ball point pen as described in claim 3 , wherein the boric acid and the salts thereof are at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid. 8. The ink composition for an aqueous ink ball point pen as described in claim 4 , wherein the boric acid and the salts thereof are at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid. 9. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 1 . 10. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 2 . 11. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 3 . 12. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 4 . 13. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 5 . 14. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 6 . 15. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 7 . 16. An aqueous ink ball point pen charged with the ink composition for an aqueous ink ball point pen as described in claim 8 .
Borates · CPC title
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
for low viscosity liquid ink · CPC title
specially adapted for ball-point writing instruments · CPC title
Boron-containing compounds · CPC title
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