Hyperbranched Silicone MDTQ Tack Promoters

Zheng, Sijia; Liang, Shuai; Chen, Yang; Brook, Michael A.

doi:10.3390/molecules24224133

Cited by 9 publications

(9 citation statements)

References 23 publications

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“…This property has been useful for the formulation of sun protection products. The use of PSA in anti-aging products is due to its ability to temporarily keep the skin moisturized and fill in fine lines, giving the skin a plumper appearance, and decreasing inflammatory phenomena [78][79][80].…”

Section: New Trends In Cosmeticsmentioning

confidence: 99%

Applications of Natural, Semi-Synthetic, and Synthetic Polymers in Cosmetic Formulations

et al. 2020

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Cosmetics composed of synthetic and/or semi-synthetic polymers, associated or not with natural polymers, exhibit a dashing design, with thermal and chemo-sensitive properties. Cosmetic polymers are also used for the preparation of nanoparticles for the delivery of, e.g., fragrances, with the purpose to modify their release profile and also reducing the risk of evaporation. Besides, other cosmetically active nutrients, dermal permeation enhancers, have also been loaded into nanoparticles to improve their bioactivities on the skin. The use of natural polymers in cosmetic formulations is of particular relevance because of their biocompatible, safe, and eco-friendly character. These formulations are highly attractive and marketable to consumers, and are suitable for a plethora of applications, including make-up, skin, and hair care, and as modifiers and stabilizers. In this review, natural synthetic, semi-synthetic, and synthetic polymers are discussed considering their properties for cosmetic applications. Their uses in conventional and novel formulations are also presented.

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Section: New Trends In Cosmeticsmentioning

confidence: 99%

Applications of Natural, Semi-Synthetic, and Synthetic Polymers in Cosmetic Formulations

et al. 2020

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“…Silicones are very sensitive to acids/bases, which makes routes to precise silicones, such as dendrons, normally difficult. However, the Piers-Rubinsztajn (PR) reaction [ 28 ] is particularly conducive to the preparation of highly branched silicones with spatial control [ 29 ], including dendrimers [ 30 , 31 ] ( Figure 1 c).…”

Section: Introductionmentioning

confidence: 99%

Chelating Silicone Dendrons: Trying to Impact Organisms by Disrupting Ions at Interfaces

2022

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The viability of pathogens at interfaces can be disrupted by the presence of (cationic) charge and chelating groups. We report on the synthesis of silicone dendrimers and linear polymers based on a motif of hexadentate ligands with the ability to capture and deliver metal ions. Mono-, di- or trialkoxysilanes are converted in G1 to analogous vinylsilicones and then, iteratively using the Piers-Rubinsztajn reaction and hydrosilylation, each vinyl group is transformed into a trivinyl cluster at G2. The thiol-ene reaction with cysteamine or 3-mercaptopropionic acid and the trivinyl cluster leads to hexadentate ligands 3 × N–S or 3 × HOOC–S. The compounds were shown to effectively capture a variety of metals ions. Copper ion chelation was pursued in more detail, because of its toxicity. On average, metal ions form chelates with 2.4 of the three ligands in a cluster. Upon chelation, viscous oils are converted to (very) soft elastomers. Most of the ions could be stripped from the elastomers using aqueous EDTA solutions, demonstrating the ability of the silicones to both sequester and deliver ions. However, complete ion removal is not observed; at equilibrium, the silicones remain ionically crosslinked.

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“…We previously reported the use of this process combined with hydrosilylation reactions to synthesize precise silicone dendrimers with molar mass of up to 13,500 g mol −1 using iterative reactions of PR and platinum-catalyzed hydrosilylation in the absence of degradation ( Figure 2 A,C) [ 23 ]. Well-defined silicone resins with tunable branching degrees could also be prepared using this pair of reactions [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

“… The preparation of ( A , C ): well-defined silicone dendrons via an iterative process [ 24 ]. ( B ) Higher branched polymers from random SiH precursors.…”

Section: Introductionmentioning

confidence: 99%

Spatially Controlled Highly Branched Vinylsilicones

2021

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Branched silicones possess interesting properties as oils, including their viscoelastic behavior, or as precursors to controlled networks. However, highly branched silicone polymers are difficult to form reliably using a “grafting to” strategy because functional groups may be bunched together preventing complete conversion for steric reasons. We report the synthesis of vinyl-functional highly branched silicone polymers based, at their core, on the ability to spatially locate functional vinyl groups along a silicone backbone at the desired frequency. Macromonomers were created and then polymerized using the Piers–Rubinsztajn reaction with dialkoxyvinylsilanes and telechelic HSi-silicones; molecular weights of the polymerized macromonomers were controlled by the ratio of the two reagents. The vinyl groups were subjected to iterative (two steps, one pot) hydrosilylation with alkoxysilane and Piers–Rubinsztajn reactions, leading to high molecular weight, highly branched silicones after one or two iterations. The vinyl-functional products can optionally be converted to phenyl/methyl-modified branched oils or elastomers.

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Hyperbranched Silicone MDTQ Tack Promoters

Cited by 9 publications

References 23 publications

Applications of Natural, Semi-Synthetic, and Synthetic Polymers in Cosmetic Formulations

Applications of Natural, Semi-Synthetic, and Synthetic Polymers in Cosmetic Formulations

Chelating Silicone Dendrons: Trying to Impact Organisms by Disrupting Ions at Interfaces

Spatially Controlled Highly Branched Vinylsilicones

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