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Stable reversible-coloured photochromic additive

An additive and chromic technology, applied in the field of stable reversible color photochromic additives, reversible color photochromic additives, and reversible color-changing cosmetics, which can solve the problems of organic pigments

Inactive Publication Date: 2020-10-20
科尔颜料私人有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, organic pigments are not a preferred option

Method used

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  • Stable reversible-coloured photochromic additive
  • Stable reversible-coloured photochromic additive
  • Stable reversible-coloured photochromic additive

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specific Embodiment approach

[0072] In the following description, embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments may be utilized and structural, logical, and other changes may be made without departing from the spirit and scope of the present invention. Therefore, the following detailed description should not be viewed in a limiting sense. The following detailed description begins with a Definitions section, followed by a description of various embodiments of the invention. A series of examples is provided thereafter, followed by a brief conclusion.

[0073] Most modern cosmetics contain titanium dioxide (TiO 2 ) and iron oxides, especially TiO 2 and iron oxide nanoparticles. These inorganic pigments blend more easily into the skin than their earlier used agglomerated forms. These are known photochromic pigments as well as SPF additives. Cosmetics containing them show a change in their darkness when exposed to sunlight. ...

Embodiment

[0112] We have exemplified in Table 1 the formulation of the stable reversible color photochromic additive of the present invention.

[0113] Table 1. Stable reversible color photochromic additive (i.e. RCPA) formulation:

[0114]

[0115] Process:

[0116] 1. Mix components A, B, C and D in various proportions as given in Table 1 by jet milling at 8 bar and maintaining the temperature at 8°C;

[0117] 2. Calcining the mixture at 840° C. for 4 hours;

[0118] 3. Cool the calcined product, the additive, and further jet mill at 8 bar and maintain the temperature at 8° C. to obtain additive (1) to additive (9).

[0119] Additives (1) to (9) were first tested for their SPF values ​​by COLIPA 2011, and tested for average particle size by ASTME2651-13 (particle size analysis). The results of the SPF and particle size analysis are shown in Table 2.

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Abstract

The application relates to a stable reversible-coloured photochromic additive. A stable and consistent reversible-coloured photochromic additive changes colour from an original buff colour to a desired colour shade, between pink to blue, when exposed to sunlight and restores to the original colour in the absence of the sunlight. The reversible-coloured photochromic additive may simultaneously havean SPF value of at least 3. The additive comprises titanium dioxide, psuedoboehmite, iron oxide hydroxide and tungsten oxide.

Description

[0001] The present invention relates generally to photochromic additives, and in particular to stable reversible-coloured photochromic additives. A stable reversible colored photochromic additive with an SPF of at least 3 may be an added advantage. [0002] The present invention also relates to a process for the preparation of stable reversible colored photochromic additives with consistent properties. [0003] The present invention also relates to the use of stable reversible colored photochromic additives in a variety of fields including cosmetics, personal care products, healthcare products, paints, inks, textiles, glass, optical lenses, Plastics, articles and the like. [0004] Background of the invention: [0005] Stable and safe cosmetics with varying colors are constantly being explored and have become an important aspect of expanding the global cosmetics business. [0006] Cosmetics are fantastic tools for changing or enhancing people's appearance for a variety of pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00A61K8/29A61K8/26A61K8/19A61Q19/00
CPCA61K8/19A61K8/26A61K8/29A61K2800/10A61K2800/438A61Q19/00C09K9/00A61Q1/02A61Q1/04A61Q1/08A61Q1/10A61Q3/02A61Q5/065A61Q17/04C01P2004/62C01P2006/62C01P2006/63C01P2006/64C08K9/12C09C1/0084C09D7/48C09D7/62A61K2800/45C01P2006/60
Inventor 德赛·德鲁拜·比库拜
Owner 科尔颜料私人有限公司