Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sunscreen formulations

A technology of absorbent and stabilizer, which is applied in the field of silicon dioxide and sunscreen compositions, and can solve the problems of sunscreen instability and collagen fiber damage

Active Publication Date: 2014-04-30
MARY KAY INC
View PDF20 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A problem with most of these compositions is that sunscreens that absorb ultraviolet A (UVA) radiation between 400 nm and 315 nm are unstable and cannot be fully absorbed in the composition
This results in compositions that are ineffective at protecting the skin from UVA radiation, which can cause damage to the collagen fibers in the skin

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sunscreen formulations
  • Sunscreen formulations
  • Sunscreen formulations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (test carrier)

[0100] Tables 1 and 2 describe typical skin test formulations in which sunscreens, solubilizers and stabilizers may be incorporated to determine the efficacy and stability of the compositions in protecting the skin from UVA and UVB.

[0101] Table 1 *

[0102] Element

Concentration (by weight)%

Phase A

water

Appropriate amount

xanthan gum

0.1

M-benzoate

0.15

P-benzoate

0.1

citric acid

0.1

Phase B

cetyl alcohol

4.0

Glyceryl Stearate+PEG100

4.0

Octyl palmitate

4.0

Polydimethylsiloxane

1.0

tocopheryl acetate

0.2

Phase C **

active substance

base on needs

total

100

[0103] * Procedure for preparing the composition: Sprinkle xanthan gum into water and mix for 10 minutes. Then, add all ingredients in Phase A and heat to 70 to 75°C. Add all items in Phase B to a ...

Embodiment 2

[0112] (sample preparation)

[0113] The compositions in Tables 3 and 4 are sample formulations that were found to be particularly effective in providing broad-band protection from UVA and UVB radiation. For example, the formulation of Table 3 was determined to have an SPF value of about 35 and a PVA value of at least 8, thereby classifying it as a PA+++ sunscreen product. In fact, this formulation falls within the protective range of a 3:1 ratio of UVB to UVA. For the formulation of Table 4, it was found to have an SPF value of about 50 and a PVA value of at least 8, thereby classifying it as a PA+++ sunscreen product. Additional testing confirmed that the formulations of Tables 3-4 are emulsions with long-term stability (i.e., the solubility of the sunscreen in the composition can be stored for 1 year at room temperature / about 20 to 25°C), as measured by standard thermal stability tests determined.

[0114] table 3 *

[0115] Element

Concentration (by weig...

Embodiment 3

[0123] (additional analysis)

[0124] Compositions of the invention, such as those disclosed in Tables 1 to 4, can be assayed to determine the ability of such compositions to treat other skin-related conditions.

[0125] Erythema Assay: An assay that measures reduction in skin redness can be assessed using the Minolta Chromometer. Skin erythema can be induced by applying a 0.2% sodium lauryl sulfate solution to the subject's forearm. The area is protected for 24 hours with an occlusive patch. After 24 hours, the patch is removed and a Minolta Chroma Meter can be used * Values ​​were evaluated for irritation-induced redness. a * The value measures the change in skin tone in the red area. Immediately after the measurement, the area is treated with the composition of the invention. Repeat measurements are taken periodically to determine the ability of the formulation to reduce redness and irritation.

[0126] Skin Moisture / Hydration Analysis: The benefits of skin moisture / ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed are stable sunscreen compositions and corresponding methods for their use that are effective in protecting skin from UVA and UVB radiation. The composition uses a combination of ingredients to effectively and stably solubilize sunscreen agents to create a stable formulation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 494,682, filed June 8, 2011, the contents of which are incorporated herein by reference. Background technique [0003] A.Technical field [0004] The present invention generally relates to sunscreen compositions. [0005] B. Related technical description [0006] Sunscreen compositions are known in the art. A problem with most of these compositions is that sunscreens that absorb ultraviolet A (UVA) radiation between 400 nm and 315 nm are unstable and cannot be fully absorbed within the composition. This results in compositions that are ineffective at protecting the skin from UVA radiation, which can cause damage to the collagen fibers in the skin. Damage to collagen fibers can in turn lead to the appearance of fine lines or wrinkles and loss of skin elasticity. Contents of the invention [0007] The present invention provides a solution to th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/34A61K8/31A61K8/30A61Q17/04A61Q19/00
CPCA61K8/35A61K8/37A61Q17/04A61K2800/5922A61K2800/49A61K8/40A61K8/375A61K8/86
Inventor 格雷格·诺曼
Owner MARY KAY INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com