IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0776860
(2004-02-11)
|
등록번호 |
US-7442725
(2008-10-28)
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발명자
/ 주소 |
- Kwan,Wing Sum Vincent
- Zhu,Jiandong
|
출원인 / 주소 |
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
59 |
초록
▼
An improved color changing correction fluid is provided which includes either a volatile base or a volatile acid in combination with a color changing pH indicator, all in a water based fluid or system. As the fluid dries, the volatile base or acid evaporates along with the water and the pH color ch
An improved color changing correction fluid is provided which includes either a volatile base or a volatile acid in combination with a color changing pH indicator, all in a water based fluid or system. As the fluid dries, the volatile base or acid evaporates along with the water and the pH color changing indicator changes from a colored state to a clear state. For white paper, a white pigment is utilized and therefore the fluid changes from a colored state to a white finished state as the solvent water and acid or base evaporates. Different color pigments can be utilized to match the color of the particular paper or substrate.
대표청구항
▼
What is claimed is: 1. A color changing correction fluid comprising: water; titanium dioxide in an amount from about 35 weight percent to about 60 weight percent; a volatile base; and a color changing pH indicator. 2. The color changing correction fluid of claim 1 wherein the volatile base is se
What is claimed is: 1. A color changing correction fluid comprising: water; titanium dioxide in an amount from about 35 weight percent to about 60 weight percent; a volatile base; and a color changing pH indicator. 2. The color changing correction fluid of claim 1 wherein the volatile base is selected from the group consisting of tri-ethylamine (TEA), 2-amino-2-methyl-1-propanol (AMP), dimethylaminopropylamine (DMAPA), N,N-dimethylethanolamine (DMEA), ammonia and mixtures thereof. 3. The color changing correction fluid of claim 1 wherein the color changing pH indicator is selected from the group consisting of phenolphthalein, thymolphthal, p-naphtholbenzein, 4-nitrophenol, 3-nitrophenol, o-cresolphthalein, m-cresol red, thymol blue, m-cresol purple and mixtures thereof. 4. The color changing correction fluid of claim 1 further comprising a film-forming polymer. 5. The color changing correction fluid of claim 4 wherein the film-forming polymer selected from the group consisting of styrene acrylic latex, vinyl acetate ethylene latex and mixtures thereof. 6. The color changing correction fluid of claim 5 may further comprise a coalescent aid. 7. The color changing correction fluid of claim 6 wherein the coalescent aid is selected from the group consisting of dipropylene glycol dibenzoate, isodecyl benzoate, ditridecyl phthalate, glycol ether and mixtures thereof. 8. The color changing correction fluid of claim 1 further comprising an extender pigment. 9. The color changing correction fluid of claim 8 wherein the extender pigment is selected from the group consisting of aluminum silicate, calcium carbonate, magnesium silicate, calcium silicate, potassium aluminum silicate and mixtures thereof. 10. A color changing correction fluid comprising: water; titanium dioxide in an amount from about 35 weight percent to about 60 weight percent; a volatile acid; and a color changing pH indicator. 11. The color changing correction fluid of claim 10 wherein the volatile acid is selected from the group consisting of acetic acid, formic acid and mixtures thereof. 12. The color changing correction fluid of claim 10 wherein the color changing pH indicator is selected from the group consisting of pentamethoxy red, methyl red, methyl yellow, phenolphthalein, thymolphthalein, p-naphtholbenzein, 4-nitrophenol, 3-nitrophenol, o-cresolphtha, m-cresol red, thymol blue, m-cresol purple and mixtures thereof. 13. The color changing correction fluid of claim 10 further comprising a film-forming polymer. 14. The color changine correction fluid of claim 13 wherein the film-forming polymer selected from the group consisting of styrene acrylate, styrene acrylic, acrylic, vinyl acetate ethylene polymers, vinylidene chloride and mixtures thereof. 15. The color changing correction fluid of claim 14 may further comprise a coalescent aid. 16. The color changing correction fluid of claim 15 wherein the coalescent aid is selected from the group consisting of dipropylene glycol dibenzoate, isodecyl benzoate, ditridecyl phihalate, glycol ether and mixtures thereof. 17. The color changing correction fluid of claim 10 further comprising an extender pigment. 18. The color changing correction fluid of claim 17 wherein the extender pigment is selected from the group consisting of aluminum silicate, calcium carbonate, magnesium silicate, calcium silicate, potassium aluminum silicate and mixtures thereof. 19. A method for correcting an error on a substrate, the method comprising: covering the error with a coating of a color changing correction fluid comprising water, titanium dioxide in an amount from about 35 weight percent to about 60 weight percent, a volatile base, and a color changing pH indicator; and, allowing the volatile base and water to evaporate thereby causing the color changing pH indicator of the fluid to change color as the fluid dries. 20. The method of claim 19 wherein the substrate is white and the color changing correction fluid is white after drying but is a non-white color when liquid. 21. A method for correcting an error on a substrate, the method comprising: covering the error with a coating of a color changing collection fluid comprising water, titanium dioxide in an amount from about 35 weight percent to about 60 weight percent, a volatile acid, and a color changing pH indicator; and, allowing the volatile acid and water to evaporate thereby causing the color changing pH indicator of the fluid to change color as the fluid dries. 22. The method of claim 21 wherein the substrate is white and the color changing correction fluid is white after drying but is a non-white color when liquid. 23. A color changing fluid comprising: water; titanium dioxide in an amount from about 35 weight percent to about 60 weight percent; a volatile base or a volatile acid; and a color changing pH indicator. 24. The color changing fluid of claim 23 wherein the volatile base is selected from the group consisting of tri-ethylamine (TEA), 2-amino-2-methyl-1-propanol (AMP), dimethylaminopropylamine (DMAPA), N,N-dimethylethanolamine (DMEA), ammonia and mixtures thereof. 25. The color changing correction fluid of claim 1 wherein the titanium dioxide is in an amount of about 35 weight percent to about 50 weight percent. 26. Th color changing correction fluid of claim 10 wherein the titanium dioxide is in an amount of about 35 weight percent to about 50 weight percent. 27. The method for correcting an error on a substrate of claim 19 wherein the titanium dioxide is in an amount of about 35 weight percent to about 50 weight percent. 28. The method for correcting an error on a substrate of claim 21 wherein the titanium dioxide is in an amount of about 35 weight percent to about 50 weight percent. 29. The color changing correction fluid of claim 23 wherein the titanium dioxide is in an amount of about 35 weight percent to about 50 weight percent.
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