Hot-melt ink composition

• US 5,954,865 A
• Filed: 03/24/1997
• Issued: 09/21/1999
• Est. Priority Date: 03/27/1996
• Status: Expired due to Term

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: Sawada, Hidemasa
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US08/823,207
• Time in Patent Office: 911 Days
• Field of Search: 106/31.29, 106/31.61
• US Class Current: 106/31.29
• CPC Class Codes: C09D 11/34 Hot-melt inks

Abstract

A hot-melt ink composition, which is solid at room temperature, used for hot-melt ink-jet recording, rises a wax component having a melting point of from to 50° C. to 150° C., an amide resin and a colorants and the wax component has at least one of a bisamide wax and a maleic anhydride modified wax.

Claims

1. A hot-melt ink composition which is solid at room temperature, used for hot-melt ink-jet recording;

said ink composition comprising a wax component having a melting point of from 50°

C. to 150°

C., an amide resin and a colorant;

said wax component comprises both of bisamide wax and a maleic anhydride modified wax.

2. The hot-melt ink composition according to claim 1, wherein said bisamide wax is at least one selected from the group consisting of methylenebisstearic acid amide, ethylenebisstearic acid amide, ethylenebisisostearic acid amide, ethylenebishydroxystearic acid amide, hexamethylenebisbehenic acid amide, hexamethylenebishydroxystearic acid amide, N,N'"'"'-distearyladipinic acid amide, N,N'"'"'-distearylsebacic acid amide, ethylenebisoleic acid amide, hexamethylenebisoleic acid amide, N,N'"'"'-dioleyladipic acid amide, and N,N'"'"'-dioleylsebacic acid amide.

3. The hot-melt ink composition according to claim 1, wherein said maleic anhydride modified wax is an α

-olefin maleic anhydride copolymer.

4. The hot-melt ink composition according to claim 1, wherein said bisamide wax is methylenebisstearic acid amide or ethylenebisoleic acid amide, and said maleic anhydride modified wax is an α

-olefin maleic anhydride copolymer.

5. The hot-melt ink composition according to claim 1, wherein said wax component is contained in an amount of from 20% by weight to 80% by weight, said amide is contained in an amount of from 5% to 60% by weight, and said colorant is contained in an amount of from 0.1% to 10% by weight.

6. The hot-melt ink composition according to claim 1, wherein said wax component is contained in an amount of from 30% to 70% by weight, said amide is contained in an amount of from 10% to 50% by weight, and said colorant is contained in an amount of from 0.5% to 8% by weight.

7. The hot-melt ink composition according to claim 1, wherein said bisamide wax is contained in an amount of from 5% to 60% by weight based on the total weight of the wax component.

8. The hot-melt ink composition according to claim 7, wherein said bisamide wax is contained in an amount of from 10% to 50% by weight based on the total weight of the wax component.

9. The hot-melt ink composition according to claim 1, wherein said maleic anhydride modified wax is contained in an amount of from 1% to 70% by weight based on the total weight of the wax component.

10. The hot-melt ink composition according to claim 9, wherein said maleic anhydride modified wax is contained in an amount of from 5% to 60% by weight based on the total weight of the wax component.

11. The hot-melt ink composition according to claim 1, wherein said amide resin has a weight average molecular weight of from 500 to 500,000.

12. The hot-melt ink composition according to claim 1, wherein said amide resin has a weight average molecular weight of from 600 to 400,000.

13. The hot-melt ink composition according to claim 1, wherein said amide resin has a weight average molecular weight of from 700 to 300,000.

14. The hot-melt ink composition according to claim 1, wherein said wax component further has a wax selected from the group consisting of a petroleum wax, a vegetable wax, an animal wax, a mineral wax, a synthetic hydrocarbon wax, a hydrogenated wax, a modified wax, a higher fatty acid wax, a higher alcohol wax, a hydroxystearic acid wax, a ketone wax, an amine wax, an ester wax and a polymer wax.

15. An ink-jet recording process comprising jetting a hot-melt ink composition to a recording medium in the form of droplets to make a record;

said hot-melt ink composition, which is solid at room temperature, comprising a wax component having a melting point of from 50°

C. to 150°

C., an amide resin and a colorant;

said wax component comprises both a bisamide wax and a maleic anhydride modified wax.

16. The ink-jet recording process according to claim 15, wherein said hot-melt recording ink composition is jetted by utilizing the vibration of a piezoelectric device.