Patent US5310778A successfully refreshed from Google Patents.
US5310778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing ink jet inks having improved properties
Assignee: EIDP Inc
•
Filing: 1992-08-25
•
Granted: 1994-05-10
•
Expires: 2012-08-25
Abstract
Abstract A process for preparing aqueous pigmented ink jet inks with improved properties, comprising the steps of (a) charging a rubber two-roll milling apparatus with a pigment and a polymeric dispersant; (b) milling to obtain a dispersion of pigment with polymeric dispersant; and (c) dispersing the dispersion in an aqueous carrier medium.
Inventors
- 👤 Arthur Shor
- 👤 Harry J. Spinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:54
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; B; B01; B01F; B01F23/00; B01F23/50; B01F23/51; B01F33/00; B01F33/80; B01F33/834; B01F33/836; B01F33/8361; B01F33/83613; B02; B02C; B02C4/00; B02C4/28; B02C4/44; D; D06; D06P; D06P5/00; D06P5/30; B01F2101/00; B01F2101/35; B01F23/56
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
In a process for preparing aqueous pigmented ink jet inks wherein a dispersion of pigment and a polymeric dispersant is dispersed in an aqueous carrier medium, the improvement comprising: (a) charging a two-roll milling apparatus with a pigment and a polymeric dispersant, wherein said polymeric dispersant consists essentially of a random or block polymer having a molecular weight below 10,000 prepared from monomers selected from the group consisting essentially of substituted or unsubstituted acrylates or methacrylates and mixtures thereof; (b) milling to obtain a dispersion of pigment with polymeric dispersant; and (c) dispersing the pigment dispersions from step (b) in an aqueous carrier medium.
Claim 2
Dependent Claim
104 words
In a process for preparing aqueous pigmented ink jet inks wherein a dispersion of pigment and a polymeric dispersant is dispersed in an aqueous carrier medium, the improvement comprising: (a) charging a two-roll milling apparatus with a pigment and a polymeric dispersant, wherein said polymeric dispersant consists essentially of a random or block polymer having a molecular weight below 10,000 prepared from monomers selected from the group consisting essentially of substituted or unsubstituted acrylates or methacrylates and mixtures thereof; (b) milling to obtain a dispersion of pigment with polymeric dispersant; and (c) dispersing the pigment dispersions from step (b) in an aqueous carrier medium.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the pigment and polymeric dispersant are premixed prior to step (a).
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein a solvent or plasticizer is present in step (a).
Claim 5
Dependent Claim
15 words
The process of claim 3, wherein the solvent has a boiling point below 150° C.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein the solvent is present in the amount of 0-10 times the weight of the pigment.
Claim 7
Dependent Claim
17 words
The process of claim 3, wherein the solvent or plasticizer has a boiling point above 150° C.
Claim 8
Dependent Claim
23 words
The process of claim 6, wherein the solvent or plasticizer is present in the amount of 0-5 times the weight of the pigment.
Claim 9
Dependent Claim
25 words
The process of claim 1, wherein step (b) is carried out at a temperature in the range of from 25° C. to about 250° C.
Claim 10
Dependent Claim
17 words
The process of claim 8, wherein both rolls in said two-roll mill are at the same temperature.
Claim 11
Dependent Claim
16 words
The process of claim 8, wherein the rolls in said two-roll mill are at different temperatures.
Claim 12
Dependent Claim
16 words
The process of claim 1, wherein step (b) is carried out from 2 to 120 minutes.
Claim 13
Dependent Claim
17 words
The process of claim 1 or 2, wherein the pigment has a particle size of 0.005-1 micron.
Claim 14
Dependent Claim
25 words
The process of claim 1 wherein the polymeric dispersant is a block interpolymer selected from the group consisting of AB, BAB and ABC block interpolymers.
Claim 15
Dependent Claim
25 words
The process of claim 1, wherein the aqueous carrier medium is water or a mixture of water and at least one water soluble organic solvent.
Claim 16
Dependent Claim
25 words
The process of claim 14, wherein the aqueous carrier medium is present in the amount of 65-99.5% based on the total weight of the ink.
Claim 17
Dependent Claim
25 words
The process of claim 1, wherein the pigment is present in the amount of up to 30% based on the total weight of the ink.
Claim 18
Dependent Claim
24 words
The process of claim 1, wherein the polymeric dispersant is present in the amount of 0.1-30% based on the total weight of the ink.
References Cited (Backward Citations)
US4148779A
Cited
US4597794A
Cited
US4704309A
Cited
JPH01301760A
Cited
US5039339A
Cited
US5085698A
Cited
US5006598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-09 | 1997-11-08 | 1998-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-09 | 2001-11-08 | 2002-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-09 | 2005-11-08 | 2006-05-10 | $7700.00 | Window Closed / Lapsed |