Claims
- 1. A pigment composition comprising an organic pigment, from about 1 to 10%, by weight of a derivative of said pigment which acts on the surface of the organic pigment to improve the dispersion thereof and from about 3 to 20%, by weight of said pigment, of a substantially solvent-free, basic, nitrogen-containing copolymer of the polyurethane series.
- 2. The composition of claim 1, wherein said organic pigment is a quinacridone or a substituted quinacridone or a solid solution of quinacridones.
- 3. The composition of claim 2, wherein said quinacridone is gamma-quinacridone.
- 4. The composition of claim 1, wherein said organic pigment is a 1,4-diketo-pyrrolopyrrole.
- 5. The composition of claim 1, wherein said nitrogen-containing polymer of the polyurethane series is the product resulting from the reaction of a polyisocyanate with an average of 2.5-6 functional groups with
- (a) an aliphatic or cycloaliphatic monohydroxy compound or an ether- or carboxy-substituted aliphatic, cycloaliphatic or aromatic monohydroxy compound in a concentration sufficient to react with 15-50% of the NCO groups;
- (b) a polymeric hydroxy or amino compound of the formula
- G--(E).sub.n
- wherein
- E is --OH, --NH.sub.2 or --NH(C.sub.1 -C.sub.4 alkyl), n is 2 or 3, and G is an aliphatic, cycloaliphatic or aromatic group optionally containing --O--, --COO--, --CONH--, --S-- or --SO.sub.2 -- groups, in an amount to convert an additional 15-45% of the NCO groups; and
- (c) a compound of the formula
- Z--Q
- wherein
- Q is --OH, NH.sub.2, --NH(C.sub.1 -C.sub.4 alkyl) or --SH, and Z is a C.sub.2 -C.sub.10 aliphatic group with at least one tertiary amino group or a heterocyclic group with at least one basic ring nitrogen not attached to a hydrogen atom, optionally linked to Q through a C.sub.1 -C.sub.10 alkylene group, to the elimination of all NCO groups.
- 6. The composition of claim 5, wherein said copolymer has an amine value ranging from 5-15 mg. KOH/g.
- 7. The composition of claim 1, wherein said derivative is a phthalimidomethyl or sulfonic acid derivative of said pigment.
- 8. The composition of claim 2, wherein said dispersion improving derivative is a phthalimidomethyl or sulfonic acid derivative of said quinacridone.
- 9. The composition of claim 4, wherein said dispersion improving derivative is a sulfonic acid derivative of said 1,4-diketo-pyrrolopyrrole.
- 10. The composition of claim 1 which comprises gamma-quinacridone, 2 to 6% of a 2-phthalimidomethyl derivative of quinacridone and 5 to 10% of said copolymer having an amine value of from 10-12 mg. KOH/g, said percentages being based on the weight of pigment.
- 11. The composition of claim 1 which comprises gamma-quinacridone, 2 to 6% of a sulfonic acid derivative of quinacridone and 5 to 10% of said copolymer having an amine value of from 10-12 mg. KOH/g., said percentages being based on the weight of pigment.
- 12. A processfor improving the rheological and stability characteristics of an organic pigment dispersion and the gloss and distinctness properties of a finish prepared therefrom which comprises applying to the surface of said organic pigment from about 3 to 20% of a substantially solvent-free, basic, nitrogen-containing copolymer of the polyurethane series and from about 1 to 10% of a derivative of said pigment which acts on the surface of the organic pigment to improve the dispersion thereof, said percentages being based on the weight of pigment.
- 13. The process of claim 12, wherein said nitrogen-containing polymer of the polyurethane series is the product resulting from the reaction of a polyisocyanate with an average of 2.5-6 functional groups with
- (a) an aliphatic or cycloaliphatic monohydroxy compound or an ether- or carboxy-substituted aliphatic, cycloaliphatic or aromatic monohydroxy compound in a concentration sufficient to react with 15-50% of the NCO groups;
- (b) a polymeric hydroxy or amino compound of the formula
- G--(E).sub.n
- wherein
- E is --OH, --NH.sub.2 or --NH(C.sub.1 -C.sub.4 alkyl), n is 2 or 3, and G is an aliphatic, cycloaliphatic or aromatic group optionally containing --O--, --COO--, --CONH--, --S-- or --SO.sub.2 -- groups, in an amount to convert an additional 15-45% of the NCO groups; and
- (c) a compound of the formula
- Z--Q
- wherein
- Q is --OH, NH.sub.2, --NH(C.sub.1 -C.sub.4 alkyl) or --SH, and Z is a C.sub.2 -C.sub.10 aliphatic group with at least one tertiary amino group or a heterocyclic group with at least one basic ring nitrogen not attached to a hydrogen atom, optionally linked to Q through a C.sub.1 -C.sub.10 alkylene group, to the elimination of all NCO groups.
RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 849,338, filed Apr. 8, 1986, now abandoned.
US Referenced Citations (17)
Foreign Referenced Citations (3)
Number |
Date |
Country |
154678 |
Sep 1985 |
EPX |
8603762 |
Jul 1986 |
WOX |
8603763 |
Jul 1986 |
WOX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
849338 |
Apr 1986 |
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