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Structural colorants with carbon

A technology of colorants and photonic structures, applied in the direction of instruments, silicon compounds, optical components, etc., can solve problems such as limited color range

Pending Publication Date: 2021-11-12
BASF COATINGS GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A problem with structured colorants is the limited range of colors obtainable due to the limitation of the refractive index of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0087] Embodiment 1: Synthesis of PEG-terminated polystyrene (PS) colloids

[0088]Materials used in this example include: styrene (99%, Sigma-Aldrich Reagent Plus, stabilized with 4-tert-butylcatechol); 4-methoxyphenol (BISOMER S 20W, GEO Specialty Chemicals); acrylic acid (Sigma-Aldrich); and ammonium persulfate (APS, OmniPur, Calbiochem).

[0089] A 500 ml three necked round bottom flask equipped with a water condenser, thermometer, nitrogen inlet and magnetic stirrer was placed in an oil bath. 129 ml of deionized water (18.2 Macm) were added and nitrogen was purged through a needle inserted into the reaction mixture while stirring at 300 rpm for 15 minutes. Styrene (8.84 g, 84.8 mmol) was added with stirring and the flask was heated to 80°C. The nitrogen delivery needle was removed from the reaction mixture but left in the flask to allow nitrogen to flow through the flask during the reaction. Once the bath equilibrated at 80°C, BISOMER S 30W (895.5mg, 7.2mmol) was added...

Embodiment 2

[0090] Example 2: Synthesis of carboxylate-terminated PS colloids

[0091] Carboxylate-terminated colloids were synthesized using a procedure similar to that described above with the following modifications:

[0092] 1L three-necked flask, 480ml deionized water, 48g styrene, 200mg acrylic acid (instead of BISOMER), 200ml APS. This process produces a 320nm colloid.

Embodiment 3

[0093] Embodiment 3: the synthesis of polymethyl methacrylate (PMMA) colloid

[0094] Materials used in this example included: ammonium persulfate (APS) - free radical initiator; methyl methacrylate (MMA) - monomer; ethylene glycol dimethacrylate (EGDMA) - crosslinker; and 1-Dodecanethiol - chain transfer agent.

[0095] Using the same setup as shown in (1), 200 mg APS was added to 90 ml deionized water and stirred for at least one hour. The temperature was closely monitored to maintain a steady 90°C throughout the reaction. In a separate container, 10.5 ml of MMA, 189.6 pL of EGDMA, and 47.3 pL of dodecanethiol were mixed and sonicated for 5 minutes before being rapidly added to the flask. Monitor the reaction temperature to ensure it returns to 90°C. The solution was stirred for 3-6 hours, then the heat was turned off and allowed to cool. The product was filtered through a kimwipe into dialysis tubing and purified for 10 cycles with daily water changes.

[0096] This pr...

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Abstract

Disclosed in certain embodiments is a composition comprising a structural colorant comprising photonic particles comprising a metal oxide and from about 0.1% to about 50% w / w of an organic material.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to U.S. Provisional Patent Application No. 62 / 817,182, filed March 12, 2019, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] Structural colorants comprising photonic particles comprising metal oxides and organic materials, methods of their preparation and uses thereof are disclosed. Background technique [0004] Traditional pigments and dyes rely on chemical structures to exhibit color through light absorption and reflection. Structural colorants rely on physical structure rather than chemical structure to exhibit color through light interference effects. Structural colorants are found in nature, such as in bird feathers, butterfly wings, and certain gemstones. Structural colorants are materials that contain a microstructured surface small enough to interfere with visible light and produce color. [0005] Structura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02B1/04
CPCG02B5/223C09D11/037C09D11/322C09D7/62C09D7/61C09D7/70C09D5/29C08K3/013C09D5/36C01B33/193C01P2004/20C01P2004/61C01P2006/16C01P2006/60C08K9/02C09C1/3054C09C3/063
Inventor Z·P·佐尔尼C·L·塔兹亚P·坦基E·谢尔曼T·凯J·艾森伯格
Owner BASF COATINGS GMBH
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