Blended nacreous pigments, colorants and adjuvants

• US 5,885,342 A
• Filed: 05/09/1997
• Issued: 03/23/1999
• Est. Priority Date: 05/09/1997
• Status: Expired due to Term

• Current Assignee: Engelhard Corporation (BASF SE)
• Original Assignee: Engelhard Corporation (BASF SE)
• Inventors: Aucar, Betty F., Christie, James D., Gale, Jeannine M.
• Primary Examiner(s): Bell, Mark L.
• Assistant Examiner(s): Hertzog, Scott L.
• Application Number:
  US08/853,928
• Time in Patent Office: 683 Days
• Field of Search: 106/402, 106/415, 106/417, 106/418
• US Class Current: 106/417
• CPC Class Codes: A61K 2800/436 Interference pigments, e.g. Iridescent, Pearlescent
• CPC Class Codes: A61K 2800/621 by inorganic compounds
• CPC Class Codes: A61K 2800/651 The particulate/core comprising inorganic material
• CPC Class Codes: A61K 8/0262 Characterized by the central layer
• CPC Class Codes: A61K 8/26 Aluminium; Compounds thereof
• CPC Class Codes: A61Q 1/06 Lipsticks
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: C01P 2004/02 obtained by optical microscopy
• CPC Class Codes: C01P 2004/20 extending in two dimensions, e.g. plate-like
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2004/62 Submicrometer sized, i.e. from 0.1-1 micrometer
• CPC Class Codes: C01P 2004/84 one phase coated with the other
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/60 Optical properties, e.g. expressed in CIELAB-values
• CPC Class Codes: C01P 2006/80 Compositional purity
• CPC Class Codes: C09C 1/0015 Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
• CPC Class Codes: C09C 1/0021 comprising a core coated with only one layer having a high or low refractive index
• CPC Class Codes: C09C 1/0081 Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound C09C1/0015, C09C1/0078 take precedence
• CPC Class Codes: C09C 2200/102 the core consisting of glass or silicate material like mica or clays, e.g. kaolin
• CPC Class Codes: C09C 2200/403 Low molecular weight materials, e.g. fatty acids
• CPC Class Codes: C09C 2200/404 : comprising additional functional groups, e.g. -NH2, -C=C- or -SO3

Abstract

Colored lustrous pigments of superior quality are prepared by dry blending a metal oxide-coated mica nacreous pigment and a colorant lake with a blend adjuvant. The resulting blend exhibits a well dispersed, stable coloration, increased hydrophobicity and is particularly useful in cosmetic applications.

Claims

1. A colored lustrous pigment in the form of a free-flowing powder, which comprises a blend of platy substrate, colorant lake and an adjuvant which bonds the lake to the substrate, and which also provides the pigment with a contact angle of water of at least 90°

.

2. The colored lustrous pigment of claim 1 in which the platy substrate is a metal oxide coated mica pearlescent pigment.

3. The colored pearlescent pigment of claim 2 containing at least one adjuvant selected from the group consisting of a natural oil, synthetic oil, hydrolyzed protein, fatty acid, fatty acid ester, fatty acid-amino acid peptide dimer, hydroxybenzoic acid ester and phenoxy alcohol.

4. The colored pearlescent pigment of claim 3 in which the adjuvant is selected from the group consisting of phenyl trimethicone, hydrogenated soybean oil, hydrogenated polyisobutene, methyl paraben, propyl paraben, butyl paraben, palmitic acid, stearic acid, caprylic/capric triglyceride, octyldodecyl stearoyl stearate, hydrolyzed oat protein, lauroyl lysine, octyl palmitate and isopropyl isostearate.

8. The colored pigment of claim 2 in which the colorant is a FD&

C or D&

C aluminum or calcium lake.

9. The colored pearlescent pigment of claim 2 in which the contact angle of water is in excess of about 100°

.

10. The colored pigment of claim 1 in which the colorant is a FD&

C or D&

C aluminum or calcium lake.

11. The colored pearlescent pigment of claim 1 in which the contact angle of water is in excess of about 100°

.

5. A colored pearlescent pigment free-flowing powder which comprises a blend of titanium dioxide coated mica pearlescent pigment, colorant aluminum lake and an adjuvant which bonds the lake to the substrate, and which also provides the pigment with a contact angle of water of at least about 100°

.

6. The colored pigment of claim 5 in which the adjuvant is at least one member of the group consisting of palmitic acid, hydrogenated polyisobutene and paraben.

7. The colored pigment of claim 6 in which the colorant is a FD&

C or D&

C aluminum or calcium lake.

12. A method of preparing a colored pigment comprising dry blending platy substrate, colorant lake and at least one adjuvant selected from the group consisting of a natural oil, synthetic oil hydrolyzed protein, fatty acid, fatty acid ester, fatty acid-amino acid peptide dimer, p-hydroxybenzoic acid ester and phenoxy alcohol.

13. The method of claim 12 in which the platy substrate is a metal oxide coated mica pearlescent pigment.

14. The method of claim 13 in which the adjuvant is selected from the group consisting of phenyl trimethicone, hydrogenated soybean oil, hydrogenated polyisobutene, methyl paraben, propyl paraben, butyl paraben, palmitic acid, stearic acid, caprylic/capric triglyceride, octyldodecyl steroyl stearate, hydrolyzed oat protein, lauroyl lysine, octyl palmitate and isopropyl isostearate.

15. The method of claim 13 in which the metal oxide is titanium dioxide and the colorant lake is an aluminum or calcium lake.

16. The method of claim 13 in which the pearlescent pigment and colorant lake are first blended and thereafter the adjuvant is added and blended therewith.

17. The method of claim 16 in which the adjuvant is at least one member of the group consisting of palmitic acid, hydrogenated polyisobutene and paraben.

18. The method of claim 17 in which the colorant is a FD&

C or D&

C aluminum or calcium lake.

19. The method of claim 12 in which the metal oxide is titanium dioxide and the colorant lake is an aluminum lake.

20. The method of claim 19 in which the pearlescent pigment and colorant lake are first blended and thereafter the adjuvant is added and blended therewith.

21. The method of claim 12 in which the pearlescent pigment and colorant lake are first blended and thereafter the adjuvant is added and blended therewith.

22. The method of claim 12 in which the adjuvant is at least one member of the group consisting of palmitic acid, hydrogenated polyisobutene and paraben.