US5166257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified rosin esters and their use in printing inks
Assignee: WestRock MWV LLC
•
Filing: 1991-11-04
•
Granted: 1992-11-24
•
Expires: 2011-11-04
Abstract
Abstract A binder for use in gravure printing ink formulations comprising a modified rosin ester resinate prepared by forming a rosin-dienophile adduct, reacting the adduct with a polyfunctional hydroxy compound to form an ester and reacting with an acrylic-containing polymer to form a hard rosin ester. The polymer-modified rosin ester resinate is formed by reacting the prepared hard rosin ester with a rosin-dienophile adduct and an acrylic-containing polymer, reacting the product thereof with reactive zinc, followed by a reaction with lime, dehydrating the resinate product by refluxing, and adjusting its viscosity with a hydrocarbon solvent.
Inventors
- 👤 Henry G. Boswell
- 👤 John H. Thomas
- 👤 Richard C. Houser
- 👤 Joseph W. LeVine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:37
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/48; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102; C09D11/104
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A polymer-modified rosin ester resinate comprising the reaction product of: a rosin-dienophile adduct prepared as the product of a reaction of a rosin selected from the group consisting of tail oil rosin, wood rosin, and gum rosin and a dienophile selected from the group consisting of fumaric acid, maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, and itaconic acid; an acrylic polymer a selected from the group consisting of mixtures of a polymer of acrylic acid, organic ester derivatives of acrylic acid, methacrylic acid, organic ester derivatives of methacrylic acid, mixtures thereof, and a member selected from the group consisting of styrene, alpha methyl styrene, ethylene vinyl acetate, and a combination thereof and a polymer-modified rosin ester comprising the reaction product of the rosin-dienophile adduct, a polyfunctional hydroxy compound, and the acrylic-containing polymer; a member selected from the group consisting of reactive zinc, magnesium oxide, lime, and mixtures thereof; and a hydrocarbon solvent.
Claim 2
Dependent Claim
155 words
A polymer-modified rosin ester resinate comprising the reaction product of: a rosin-dienophile adduct prepared as the product of a reaction of a rosin selected from the group consisting of tail oil rosin, wood rosin, and gum rosin and a dienophile selected from the group consisting of fumaric acid, maleic acid, maleic anhydride, acrylic acid, methacrylic acid, citraconic acid, and itaconic acid; an acrylic polymer a selected from the group consisting of mixtures of a polymer of acrylic acid, organic ester derivatives of acrylic acid, methacrylic acid, organic ester derivatives of methacrylic acid, mixtures thereof, and a member selected from the group consisting of styrene, alpha methyl styrene, ethylene vinyl acetate, and a combination thereof and a polymer-modified rosin ester comprising the reaction product of the rosin-dienophile adduct, a polyfunctional hydroxy compound, and the acrylic-containing polymer; a member selected from the group consisting of reactive zinc, magnesium oxide, lime, and mixtures thereof; and a hydrocarbon solvent.
Claim 3
Dependent Claim
31 words
The polymer-modified rosin ester resinate of claim 1 wherein the reactive zinc is present in an amount from about 2% to about 10% by weight based on the polymer-modified rosin ester.
Claim 4
Dependent Claim
25 words
The polymer-modified rosin ester resinate of claim 1 wherein the hydrocarbon solvent is selected from the group consisting of benzene, toluene, xylene, and mixtures thereof.
Claim 5
Dependent Claim
38 words
The polymer-modified rosin ester resinate of claim 1 wherein the resinate has a melting point greater than 170° C., an acid number between 40 and 70 and a Brookfield viscosity at 25° C. of 2000 to 4000 cps.
References Cited (Backward Citations)
US4002585A
Cited
US4322326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |