Cyclic bisamides useful in formulating inks for phase-change printing
View Patent ↗Cyclic bisamides may be used to formulate inks for jet ink printing. The cyclic bisamide may be prepared from a cyclic diamine and acylic monocarboxylic acids. Conversely, the cyclic bisamide may be prepared from a cyclic diacid and acylic monoamines. The performance properties of the product may be enhanced by adding some additional difunctional reactant(s), e.g., diacid or diamine. A blend of bisamides may provide better performance properties than either of the component bisamides alone, where the blend includes at least one cyclic bisamide. The bisamides, in combination with an image-forming material, and optionally in combination with other materials, is taken to a molten form and then applied to a substrate to provide a printed substrate.
1. A non-aqueous composition comprising an image-forming material and a cyclic bisamide of formula (I)
wherein n is 0 or an integer from 1 to 10, m is 0 or 1 to provide a cyclopenty ring or cyclohexyl ring, respectively, and G is an amide-containing group.
2. The composition of claim 1 having a viscosity at 130° C. of less than 100 cPs.
3. The composition of claim 1 having a melting point of 100-130° C.
4. The composition of claim 1 having an acid number of 0.1-10 and an amine number of 0.1-10.
5. The composition of claim 1 wherein the cyclic bisamide constitutes at least 10 wt % of the composition.
6. The composition of claim 1 wherein the image-forming material is a pigment or a dye.
7. The composition of claim 1 wherein G is —NH—C(O)—R and R is a C1-C75 alkyl group independently selected at each occurrence.
8. The composition of claim 1 wherein the cyclic bisamide is described by formula (IIIa)
9. The composition of claim 8 wherein n is zero at each occurrence, G is —NH—C(O)—R at each occurrence, and R is a C8-C22 alkyl group independently selected at each occurrence.
10. The composition of claim 1 wherein the cyclic bisamide is described by formula (IIa)
11. The composition of claim 10 wherein n is zero at one occurrence, n is 1 at one occurrence, G is —NH—C(O)—R at each occurrence, and R is a C8-C22 alkyl group independently selected at each occurrence.
12. The composition of claim 1 comprising a second bisamide compound, where the second bisamide compound is not described by formula (I).
13. The composition of claim 12 wherein the second bisamide compound comprises a polyether moiety located between two amide groups.